compaction test poster presentation
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this is a poster presentation by group 9 students of university of maiduguri, department of civil and water resources engineering. under the course Soil mechanics on the topic compaction test.
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Proctor compaction test
The document describes the standard Proctor compaction test procedure. The test is used to determine the maximum dry density and optimum moisture content of soils. It involves compacting soil samples at incrementally increased moisture contents using a specified compaction method. A compaction curve is plotted showing the relationship between dry density and moisture content. The peak of the curve indicates the optimum moisture content and maximum dry density achieved for that soil. The test uses a cylindrical metal mold, rammer, balance, oven and other equipment to compact and analyze the soil samples according to steps that sieve, mix, compact and weigh the soil at different moistures.
Proctor Compaction Test: A Basic Guide
This presentation focuses on the significance of soil compaction (particularly the Proctor Test), how the test is performed, necessary equipment and helpful tips.
Proctor Compaction Test
Determination of water content-dry density relation using light compaction (Standard Proctor Test).
Soil Specimen (Compositions of Dhanauri Clay and Delhi Silt).
It is seen that as the proportion of clay is increased in the soil mix the Optimum Moisture Increases and the Maximum Dry Density Decreases.
Compaction test of soil ASTM-D698
The document discusses soil compaction testing. There are two main types of compaction tests - standard and modified proctor. The standard proctor test uses a 4 inch diameter mold compacted in 3 layers with 25 blows per layer. The modified proctor uses a 6 inch mold compacted in 5 layers with 25 blows per layer. The test determines the optimum moisture content for compaction by measuring dry unit weight at different moisture contents. Testing involves compacting soil samples, determining dry unit weights and moisture contents, and plotting a curve showing maximum dry unit weight corresponds to optimum moisture content.
Proctor compaction test
proctor compaction test for laboratory
this test is used to determine the relationship between water content and dry unit weight of soils.
Standard proctor test
This document summarizes a standard Proctor compaction test conducted on a soil sample. The test involves compacting the soil at different moisture contents in layers using a standardized hammer and measuring the dry unit weight. The maximum dry unit weight of 1.74 g/cm3 was found at an optimum moisture content of 13.7% based on the graph, however one data point exceeded the theoretical zero-air void curve, invalidating the test. The test will need to be redone to get accurate and dependable results.
7 a soil properties determination
This document describes various laboratory methods for determining soil properties, including liquid limit, plastic limit, and field density. The liquid limit can be found using a Casagrande apparatus or cone penetrometer, which measure the number of blows or penetration depth required for a soil sample to close a groove at different water contents. The plastic limit is the water content at which a soil thread crumbles. Field density is measured using a core cutter method or sand replacement method.
Compaction tests
The document discusses compaction tests for soil. It defines compaction as packing soil particles more closely together through dynamic loading, reducing air voids without changing water content. Compaction improves soil engineering properties like strength and permeability. Laboratory tests establish relationships between dry density and moisture content under controlled conditions. The standard Proctor test uses a 2.6 kg hammer and the modified Proctor test uses a 4.89 kg hammer, transmitting more energy to achieve higher compaction. Both tests yield curves showing maximum dry density occurs at optimum moisture content.
Recommended
Proctor compaction test
The document describes the standard Proctor compaction test procedure. The test is used to determine the maximum dry density and optimum moisture content of soils. It involves compacting soil samples at incrementally increased moisture contents using a specified compaction method. A compaction curve is plotted showing the relationship between dry density and moisture content. The peak of the curve indicates the optimum moisture content and maximum dry density achieved for that soil. The test uses a cylindrical metal mold, rammer, balance, oven and other equipment to compact and analyze the soil samples according to steps that sieve, mix, compact and weigh the soil at different moistures.
Proctor Compaction Test: A Basic Guide
This presentation focuses on the significance of soil compaction (particularly the Proctor Test), how the test is performed, necessary equipment and helpful tips.
Proctor Compaction Test
Determination of water content-dry density relation using light compaction (Standard Proctor Test).
Soil Specimen (Compositions of Dhanauri Clay and Delhi Silt).
It is seen that as the proportion of clay is increased in the soil mix the Optimum Moisture Increases and the Maximum Dry Density Decreases.
Compaction test of soil ASTM-D698
The document discusses soil compaction testing. There are two main types of compaction tests - standard and modified proctor. The standard proctor test uses a 4 inch diameter mold compacted in 3 layers with 25 blows per layer. The modified proctor uses a 6 inch mold compacted in 5 layers with 25 blows per layer. The test determines the optimum moisture content for compaction by measuring dry unit weight at different moisture contents. Testing involves compacting soil samples, determining dry unit weights and moisture contents, and plotting a curve showing maximum dry unit weight corresponds to optimum moisture content.
Proctor compaction test
proctor compaction test for laboratory
this test is used to determine the relationship between water content and dry unit weight of soils.
Standard proctor test
This document summarizes a standard Proctor compaction test conducted on a soil sample. The test involves compacting the soil at different moisture contents in layers using a standardized hammer and measuring the dry unit weight. The maximum dry unit weight of 1.74 g/cm3 was found at an optimum moisture content of 13.7% based on the graph, however one data point exceeded the theoretical zero-air void curve, invalidating the test. The test will need to be redone to get accurate and dependable results.
7 a soil properties determination
This document describes various laboratory methods for determining soil properties, including liquid limit, plastic limit, and field density. The liquid limit can be found using a Casagrande apparatus or cone penetrometer, which measure the number of blows or penetration depth required for a soil sample to close a groove at different water contents. The plastic limit is the water content at which a soil thread crumbles. Field density is measured using a core cutter method or sand replacement method.
Compaction tests
The document discusses compaction tests for soil. It defines compaction as packing soil particles more closely together through dynamic loading, reducing air voids without changing water content. Compaction improves soil engineering properties like strength and permeability. Laboratory tests establish relationships between dry density and moisture content under controlled conditions. The standard Proctor test uses a 2.6 kg hammer and the modified Proctor test uses a 4.89 kg hammer, transmitting more energy to achieve higher compaction. Both tests yield curves showing maximum dry density occurs at optimum moisture content.
Sand replacement
The sand replacement test determines the in situ density of natural or compacted soils using sand pouring cylinders. The test involves excavating a soil sample, measuring its mass, and replacing the excavated volume with sand of a known density to find the sample volume. This allows calculating the dry density based on the sample mass and volume. The test establishes a relationship between dry density and moisture content. It is used to evaluate compaction levels in the field according to acceptance criteria for different depths.
Ex 8 standard proctor test
The standard Proctor test is conducted to determine the optimum water content and maximum dry density of soil for compaction. Soil samples are compacted in layers in a standardized metal mold at different water contents using a rammer. The bulk density of each compacted sample is calculated and a curve is plotted of dry density versus water content. The water content corresponding to the highest dry density is the optimum water content. A penetration resistance test is also conducted using a Proctor needle to obtain the relationship between penetration resistance and water content.
Field compaction methods
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Subgrade soil test, by Micotol
Sieve analysis
Atterberg limit test (liquid limit & Plastic limit)
Compaction test (Standard and modified proctor test)
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Proktor compaction
1) The Proctor compaction test is used to determine the optimal moisture content and maximum dry density of soil. It involves compacting soil in layers in a mold using controlled blows and measuring the dry density at different moisture contents.
2) The test procedure involves weighing equipment, sieving dry soil, compacting soil in layers using blows from a ram, weighing the compacted soil, determining moisture content, and repeating at different moisture contents.
3) A compaction curve is made by plotting dry density against moisture content. The peak of the curve indicates the optimum moisture content which produces the highest dry density.
Soil Compaction
It's about soil compaction. Here only laboratory compaction methods have been described and the effect different parameters have been discussed,
Atterberg limits
The document discusses three soil tests: the liquid limit test determines the moisture content needed for a soil pat to close a groove after 25 drops from 10 mm; the plastic limit test finds the moisture content where a 3 mm soil thread will crumble; and the shrinkage limit test measures the volume and mass of wet and dried soil in a dish to determine moisture loss.
proctor test and compaction
The Proctor compaction test is used to determine the optimal moisture content and maximum dry density of soils. It involves compacting soil samples in a mold using a standardized compactive effort at different moisture contents. The dry density is measured for each sample to create a compaction curve showing the relationship between dry density and moisture content. The peak of the curve indicates the optimum moisture content and maximum dry density, which represent the conditions when the soil is most dense and has the highest load-bearing capacity. The test is important for determining how to properly compact soils in the field.
Laboratory soil compaction test
The document discusses laboratory soil compaction tests. It defines compaction as increasing the bulk density of soil by removing air through external compactive effort. An optimum water content exists where soil achieves maximum density. The document outlines standard and modified Proctor compaction tests and describes how to conduct the tests by compacting soil in layers using specified hammers and measuring dry density at different water contents. Compaction increases soil strength, stability and resistance to erosion while decreasing permeability and compressibility.
Goetechnical lab tests, atterberg limits tests
The document discusses various methods used to characterize soils, including Atterberg limits, Proctor compaction testing, and field density testing.
The Atterberg limits—liquid limit, plastic limit, and shrinkage limit—describe the critical water content ranges where a fine-grained soil transitions between solid, semi-solid, plastic, and liquid states.
Proctor compaction testing involves compacting soil samples at different moisture contents to determine the optimum moisture content and maximum dry density for compaction.
Field density testing uses core cutter and sand replacement methods to directly measure the dry density of compacted soils in construction projects like embankments, highways, and railways.
Atterberg limit test
This document presents information on determining the Atterberg limits of soils, which are important properties used to characterize soils in engineering. It discusses the purpose and procedures for determining the liquid limit and plastic limit through laboratory tests. The liquid limit is the moisture content where a soil changes from plastic to liquid state, while the plastic limit is where it changes from semi-solid to plastic. Factors like clay content and type, organic matter, and exchangeable cations can affect the Atterberg limits. The document describes the apparatus used and discusses the meaning and applications of these tests.
Field control of compaction and compaction Equipment
This document discusses field compaction control and compaction equipment. It notes that field compaction depends on placement water content, compaction equipment type, and soil type. Placement water content should be within 2% of optimum moisture content from lab tests. Different soils require different moisture levels - cohesive soils are compacted dry of optimum while earth dam cores are compacted wet of optimum. Compaction can be measured using methods like core cutting or nuclear gauges. Common compaction equipment includes smooth drum rollers, pneumatic rubber-tired rollers, sheepfoot rollers, and vibratory rollers, each suited to different soil types. Relative compaction is used to check compaction levels in the field.
Compaction
This document provides information about soil compaction, including definitions, general principles, objectives, laboratory compaction testing methods (standard and modified Proctor tests), and field compaction. It defines soil compaction as increasing the density of soil by reducing the volume of air through mechanical means. The key objectives of compaction are increasing bearing capacity, reducing settlement, and controlling volume change. It describes the standard and modified Proctor tests for determining optimum moisture content and maximum dry density in a lab setting. Finally, it discusses different types of field compaction equipment like smooth drum, pneumatic rubber tired, and vibratory rollers.
Liquid limit & plastic limit test
This document summarizes the liquid limit and plastic limit tests conducted on a soil sample. The liquid limit was found to be 51.679% using two different methods that produced similar results. The plastic limit was 24.525%. Based on these Atterberg limits, the soil was classified as clay with high plasticity. The limits help characterize the soil's engineering properties and behavior when wet or dry. The experiment showed the soil behaves plastically when wet and becomes hard when dry, typical of clays.
Compaction of soil (for civil engineering)
i have made all the slide according to poly diploma civil and also for civil engineering
my gmail account - laxmans227@gmail.com
these are 100% correct but in case of some error comment down or contact me
follow me for all updates
if u have any doubt fell free to ask on comment section
software - power point presentation 2015
Min and Max Density of soil
This report summarizes an experiment to determine the minimum and maximum dry density of a Badarpur sand soil specimen. Testing was conducted according to Indian Standards and involved compacting sand in a vibratory compactor and measuring the dry density. The average minimum dry density was found to be 1.469 g/cm3 and the average maximum was 1.679 g/cm3. These values were 11-15% higher than a Yamuna River sand sample. The Badarpur sand was also observed to be more angular in shape compared to the Yamuna River sand. The report discusses how dry density values can depend on testing methods and compaction energy applied.
GT Lab Manual
The document provides instructions for conducting 12 geotechnical engineering experiments in the geotechnical engineering lab at B.V. Raju Institute of Technology. The experiments include determining Atterberg limits, field density via core cutter and sand replacement methods, grain size analysis, constant and variable head permeability tests, unconfined compression test, direct shear test, compaction tests, and CBR testing. Students must complete 8 of the 12 experiments listed. Instructions are provided for each experiment, including the aim, theory, apparatus required, and procedures to follow.
Lecture soil compaction
The document discusses soil compaction, including definitions of compaction and consolidation. It provides details on quantifying compaction through dry unit weight measurements and explains how moisture content affects compaction. The optimal moisture content that achieves maximum dry unit weight is described. Common compaction tests like the Standard Proctor and Modified Proctor tests are summarized. Finally, methods for compaction in the field like rollers and dynamic compaction are briefly explained.
Compactionfield method and interpretation of lab method
Compaction is a ground improvement technique that densifies soil through external effort like rolling, ramming, or vibration. Rolling uses heavy cylinders to compact soil surfaces like sports pitches. Ramming involves dropping a heavy block or mechanical rammer onto soil. Vibration compactors include vibratory rollers, plates, and tampers used in confined areas. Laboratory tests determine optimum water content and maximum dry density for different soils and compactive efforts like standard and modified Proctor tests.
Soil compaction
This document discusses soil compaction, including the standard Proctor test used to determine optimum moisture content and maximum dry unit weight of soils. The standard Proctor test involves compacting soil in 3 layers in a standardized mold using a hammer dropped from a specific height. Compaction curves relate dry unit weight to water content, with the peak indicating optimum conditions. Key factors that affect compaction are water content, compactive effort, soil type, and compaction method. Field tests verify compaction using methods such as nuclear gauges, which are faster than destructive sand cone and balloon tests.
Soil Compaction slide.pptx
Here are the steps to solve this numerical problem:
1) Plot the dry density vs water content data points on a graph. Draw a smooth curve through the points to obtain the compaction curve.
2) The maximum dry density from the curve is 1.95 g/cc at a water content of 13.75%.
3) Draw the 100% saturation line using the equation: Dry density = Specific gravity / (1 + water content).
4) Draw the 80% saturation line by using 80% of the specific gravity in the saturation line equation.
5) 95% relative compaction corresponds to a dry density of 1.95 * 0.95 = 1.85 g/cc.
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Sand replacement
The sand replacement test determines the in situ density of natural or compacted soils using sand pouring cylinders. The test involves excavating a soil sample, measuring its mass, and replacing the excavated volume with sand of a known density to find the sample volume. This allows calculating the dry density based on the sample mass and volume. The test establishes a relationship between dry density and moisture content. It is used to evaluate compaction levels in the field according to acceptance criteria for different depths.
Ex 8 standard proctor test
The standard Proctor test is conducted to determine the optimum water content and maximum dry density of soil for compaction. Soil samples are compacted in layers in a standardized metal mold at different water contents using a rammer. The bulk density of each compacted sample is calculated and a curve is plotted of dry density versus water content. The water content corresponding to the highest dry density is the optimum water content. A penetration resistance test is also conducted using a Proctor needle to obtain the relationship between penetration resistance and water content.
Field compaction methods
In this presentation various field methods of compaction along with their practical applications are discussed
Subgrade soil test, by Micotol
Sieve analysis
Atterberg limit test (liquid limit & Plastic limit)
Compaction test (Standard and modified proctor test)
California bearing ratio test (CBR)
Proktor compaction
1) The Proctor compaction test is used to determine the optimal moisture content and maximum dry density of soil. It involves compacting soil in layers in a mold using controlled blows and measuring the dry density at different moisture contents.
2) The test procedure involves weighing equipment, sieving dry soil, compacting soil in layers using blows from a ram, weighing the compacted soil, determining moisture content, and repeating at different moisture contents.
3) A compaction curve is made by plotting dry density against moisture content. The peak of the curve indicates the optimum moisture content which produces the highest dry density.
Soil Compaction
It's about soil compaction. Here only laboratory compaction methods have been described and the effect different parameters have been discussed,
Atterberg limits
The document discusses three soil tests: the liquid limit test determines the moisture content needed for a soil pat to close a groove after 25 drops from 10 mm; the plastic limit test finds the moisture content where a 3 mm soil thread will crumble; and the shrinkage limit test measures the volume and mass of wet and dried soil in a dish to determine moisture loss.
proctor test and compaction
The Proctor compaction test is used to determine the optimal moisture content and maximum dry density of soils. It involves compacting soil samples in a mold using a standardized compactive effort at different moisture contents. The dry density is measured for each sample to create a compaction curve showing the relationship between dry density and moisture content. The peak of the curve indicates the optimum moisture content and maximum dry density, which represent the conditions when the soil is most dense and has the highest load-bearing capacity. The test is important for determining how to properly compact soils in the field.
Laboratory soil compaction test
The document discusses laboratory soil compaction tests. It defines compaction as increasing the bulk density of soil by removing air through external compactive effort. An optimum water content exists where soil achieves maximum density. The document outlines standard and modified Proctor compaction tests and describes how to conduct the tests by compacting soil in layers using specified hammers and measuring dry density at different water contents. Compaction increases soil strength, stability and resistance to erosion while decreasing permeability and compressibility.
Goetechnical lab tests, atterberg limits tests
The document discusses various methods used to characterize soils, including Atterberg limits, Proctor compaction testing, and field density testing.
The Atterberg limits—liquid limit, plastic limit, and shrinkage limit—describe the critical water content ranges where a fine-grained soil transitions between solid, semi-solid, plastic, and liquid states.
Proctor compaction testing involves compacting soil samples at different moisture contents to determine the optimum moisture content and maximum dry density for compaction.
Field density testing uses core cutter and sand replacement methods to directly measure the dry density of compacted soils in construction projects like embankments, highways, and railways.
Atterberg limit test
This document presents information on determining the Atterberg limits of soils, which are important properties used to characterize soils in engineering. It discusses the purpose and procedures for determining the liquid limit and plastic limit through laboratory tests. The liquid limit is the moisture content where a soil changes from plastic to liquid state, while the plastic limit is where it changes from semi-solid to plastic. Factors like clay content and type, organic matter, and exchangeable cations can affect the Atterberg limits. The document describes the apparatus used and discusses the meaning and applications of these tests.
Field control of compaction and compaction Equipment
This document discusses field compaction control and compaction equipment. It notes that field compaction depends on placement water content, compaction equipment type, and soil type. Placement water content should be within 2% of optimum moisture content from lab tests. Different soils require different moisture levels - cohesive soils are compacted dry of optimum while earth dam cores are compacted wet of optimum. Compaction can be measured using methods like core cutting or nuclear gauges. Common compaction equipment includes smooth drum rollers, pneumatic rubber-tired rollers, sheepfoot rollers, and vibratory rollers, each suited to different soil types. Relative compaction is used to check compaction levels in the field.
Compaction
This document provides information about soil compaction, including definitions, general principles, objectives, laboratory compaction testing methods (standard and modified Proctor tests), and field compaction. It defines soil compaction as increasing the density of soil by reducing the volume of air through mechanical means. The key objectives of compaction are increasing bearing capacity, reducing settlement, and controlling volume change. It describes the standard and modified Proctor tests for determining optimum moisture content and maximum dry density in a lab setting. Finally, it discusses different types of field compaction equipment like smooth drum, pneumatic rubber tired, and vibratory rollers.
Liquid limit & plastic limit test
This document summarizes the liquid limit and plastic limit tests conducted on a soil sample. The liquid limit was found to be 51.679% using two different methods that produced similar results. The plastic limit was 24.525%. Based on these Atterberg limits, the soil was classified as clay with high plasticity. The limits help characterize the soil's engineering properties and behavior when wet or dry. The experiment showed the soil behaves plastically when wet and becomes hard when dry, typical of clays.
Compaction of soil (for civil engineering)
i have made all the slide according to poly diploma civil and also for civil engineering
my gmail account - laxmans227@gmail.com
these are 100% correct but in case of some error comment down or contact me
follow me for all updates
if u have any doubt fell free to ask on comment section
software - power point presentation 2015
Min and Max Density of soil
This report summarizes an experiment to determine the minimum and maximum dry density of a Badarpur sand soil specimen. Testing was conducted according to Indian Standards and involved compacting sand in a vibratory compactor and measuring the dry density. The average minimum dry density was found to be 1.469 g/cm3 and the average maximum was 1.679 g/cm3. These values were 11-15% higher than a Yamuna River sand sample. The Badarpur sand was also observed to be more angular in shape compared to the Yamuna River sand. The report discusses how dry density values can depend on testing methods and compaction energy applied.
GT Lab Manual
The document provides instructions for conducting 12 geotechnical engineering experiments in the geotechnical engineering lab at B.V. Raju Institute of Technology. The experiments include determining Atterberg limits, field density via core cutter and sand replacement methods, grain size analysis, constant and variable head permeability tests, unconfined compression test, direct shear test, compaction tests, and CBR testing. Students must complete 8 of the 12 experiments listed. Instructions are provided for each experiment, including the aim, theory, apparatus required, and procedures to follow.
Lecture soil compaction
The document discusses soil compaction, including definitions of compaction and consolidation. It provides details on quantifying compaction through dry unit weight measurements and explains how moisture content affects compaction. The optimal moisture content that achieves maximum dry unit weight is described. Common compaction tests like the Standard Proctor and Modified Proctor tests are summarized. Finally, methods for compaction in the field like rollers and dynamic compaction are briefly explained.
Compactionfield method and interpretation of lab method
Compaction is a ground improvement technique that densifies soil through external effort like rolling, ramming, or vibration. Rolling uses heavy cylinders to compact soil surfaces like sports pitches. Ramming involves dropping a heavy block or mechanical rammer onto soil. Vibration compactors include vibratory rollers, plates, and tampers used in confined areas. Laboratory tests determine optimum water content and maximum dry density for different soils and compactive efforts like standard and modified Proctor tests.
Soil compaction
This document discusses soil compaction, including the standard Proctor test used to determine optimum moisture content and maximum dry unit weight of soils. The standard Proctor test involves compacting soil in 3 layers in a standardized mold using a hammer dropped from a specific height. Compaction curves relate dry unit weight to water content, with the peak indicating optimum conditions. Key factors that affect compaction are water content, compactive effort, soil type, and compaction method. Field tests verify compaction using methods such as nuclear gauges, which are faster than destructive sand cone and balloon tests.
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Field control of compaction and compaction Equipment
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Soil Compaction slide.pptx
Here are the steps to solve this numerical problem:
1) Plot the dry density vs water content data points on a graph. Draw a smooth curve through the points to obtain the compaction curve.
2) The maximum dry density from the curve is 1.95 g/cc at a water content of 13.75%.
3) Draw the 100% saturation line using the equation: Dry density = Specific gravity / (1 + water content).
4) Draw the 80% saturation line by using 80% of the specific gravity in the saturation line equation.
5) 95% relative compaction corresponds to a dry density of 1.95 * 0.95 = 1.85 g/cc.
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This document provides details on conducting a California Bearing Ratio (CBR) test to determine the bearing strength of soil in a lab. It describes the apparatus needed, including molds, a collar, spacer disc, rammer, and loading machine. It outlines two methods for compacting soil specimens in the molds: static compaction and dynamic compaction. For the dynamic compaction method, it explains how to mix the soil, weigh and compact the mold in layers, and prepare additional specimens for soaking and testing. The CBR test results provide a measure of soil strength that can be used for pavement design.
pavementmaterialsandtesting-190731090243.pdf
The document discusses various types of soils used in subgrade for road construction. It describes desirable properties of subgrade soil including stability, drainage, and ease of compaction. It also discusses different soil types commonly used in India and their classification. Various laboratory tests conducted on soil include shear tests, bearing tests, penetration tests, and California Bearing Ratio tests. The document also covers soil compaction and evaluation of soil strength.
Pavement materials and testing
The document discusses various types of soils used in subgrade for road construction. It describes desirable properties of subgrade soil including stability, drainage, and ease of compaction. It also discusses different soil types commonly used in India and their classification. Various laboratory tests conducted on soil are outlined including shear tests, bearing tests, and penetration tests like the California Bearing Ratio test. The test procedures for CBR and plate bearing tests are summarized.
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compaction test poster presentation
- 1. INTRODUCTION OBJECTIVES COMPACTION TEST PROCTOR MOULD PROCTOR RAMMER WEIGHING BALANCE/ SENSITIVE EXTRUDER TRAY, SCOOP, AND MIXING TOOLS DRYING OVEN GRADUATED CYLINDER ✓ To increase strength and stability. ✓ To decrease permeability. ✓ To enhance resistance to erosion. ✓ Decrease compressibility under load and minimize settlement. ▪ Compaction is the process of increasing the bulk density of a soil or aggregate by driving out air only. ▪ For any soil at a given compactive effort, the density depends on the moisture content. ▪ For any soil, an “optimum water content” exist at which it will achieve its maximum density. ▪ Reduced proctor, RP, 15blows, 2.5kg, 3layers. ▪ Modified proctor, MP, 25blows, 4.5kg, 5layers. ▪ Standard proctor, SP, 25blows, 2.5kg, 3layers. MEMBERS ▪ The most common laboratory test for soil compaction is the Proctor compaction test. ▪ The Proctor test was invented in the 1930s by R. R. Proctor, a field engineer for the Bureau of Waterworks and Supply, in Los Angeles, California. CONCLUSION Prepare about 3kg of your soil. And pass it through No. 4 sieve. Step 1 Place the soil in the mixer and gradually add water to reach the desired moisture content (w) Step 2 Weigh the proctor mould without base plate and collar. Fix the collar and base plate. Place the soil in the Proctor mould and compact it in 3 layers giving 25 blows per layer with the 2.5 kg rammer falling through. Step 3 Then we remove the collar; trim the compacted soil even with the top of mould using a straight edge and weigh. Step 4 Extrude the soil from the mould using a metallic extruder, making sure that the extruder and the mould are in- line. Step 5 Measure the water content from the top, middle and bottom of the sample. Step 6 15/05/03/020 16/05/03/115 17/05/03/028 17/05/03/033 17/05/03/010 17/05/03/019 18/05/03/210 18/05/03/211 ▪ Because of the difference between lab and field compaction methods, the maximum dry density in the field may reach 90% to 95% APPARATUS RECOMMENDATION ✓ Take water content of the soil after each compaction. ✓ Repeat the steps until the moist density of the soil decrease. ✓ The blows should be uniformly distributed over the surface of each layer. ▪ Is the compaction of soil layer to a specified standard by means of compaction equipment COMPUTATIONS ✓ The compaction water content (w) of the soil sample is calculated using the average of the three measurements obtained (top, middle and bottom part of the soil mass). ✓ The dry unit weight is calculated as; W = the weight of the mould and the soil mass (kg) Wm = the weight of the mould (kg) w = the water content of the soil (%) V = the volume of the mould (m3) Compaction of soil is an important process which helps in achieving various physical properties required for proper soil behaviour under loading. PROCEDURES Reference: Hajong, A. (2017). Laboratory Soil Compaction Test. India: www.slideshare.net. 18/05/03/213