Concrete Mix Design.pptx
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The document describes the DOE (Department of Environment) method for concrete mix design. It involves 10 steps: 1) collecting data on materials, 2) determining target mean strength, 3) calculating water-cement ratio, 4) determining water content, 5) determining cement content, 6) calculating total aggregate weight, 7) determining fine aggregate weight, 8) determining coarse aggregate fractions, 9) determining proportions, and 10) adjusting for field conditions. An example is provided where the final mix design proportions are cement: 410 kg/m3, fine aggregate: 728 kg/m3, coarse aggregate: 1029.1 kg/m3, and water: 205 kg/m3.
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Aci mix design very good
This document discusses the process of concrete mix design. The goal of mix design is to select ingredients and determine their proportions to produce concrete of a certain minimum strength and durability as economically as possible. The key steps involve determining the target mean strength based on site conditions, selecting a water-cement ratio based on strength and durability requirements, choosing the maximum aggregate size and desired workability, and then calculating the cement content, coarse aggregate weight, fine aggregate weight, and final mix proportions. Field conditions like surface moisture must also be accounted for in the final design.
aci-mix-design-example-1.pdf
The document provides details on designing a concrete mix using the ACI method. It includes 8 steps: 1) choosing slump, 2) maximum aggregate size, 3) estimating water content and air content, 4) selecting water-cement ratio, 5) calculating cement content, 6) estimating coarse aggregate content, 7) estimating fine aggregate content, and 8) adjusting for moisture. An example is provided where the target is a 35 MPa compressive strength concrete with 50 mm slump. The method results in a mix with 190 kg of water, 395 kg of cement, 1020 kg of coarse aggregate, and 690 kg of fine aggregate per cubic meter of concrete.
Concrete Mix Design.pptx
This document outlines the Indian standard method for concrete mix design according to IS 10262-2009. The method involves 10 steps: 1) collecting data on design requirements, 2) determining target mean strength, 3) selecting water-cement ratio, 4) calculating water content, 5) determining cement content, 6) calculating coarse aggregate weight, 7) calculating fine aggregate weight, 8) combining coarse aggregate fractions, 9) determining mix proportions, and 10) adjusting for field conditions. An example is provided showing the application of these steps to design a concrete mix with a target mean strength of 38.25 MPa.
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This document discusses concrete mix design, including classifications, factors affecting design, and the step-by-step process for mix design as outlined in IS 10262-2009. It covers selecting a water-cement ratio based on strength and exposure requirements, estimating water content based on aggregate size and slump, calculating cementitious material content, and determining aggregate proportions to achieve the target mix. The final section notes that trial mixes should be tested to validate workability and strength before use in the field.
CONCRETE MIX DESIGN AS PER IS 10262:2009
This document provides details on concrete mix design according to Indian Standard IS 10262:2009. It discusses determining proportions of cement, water, fine aggregate, and coarse aggregate to produce concrete with specified properties like strength and durability at lowest cost. The key steps in mix design include: selecting water-cement ratio based on strength requirements; determining water content based on workability and aggregate type; calculating cement quantity based on water-cement ratio; estimating coarse and fine aggregate proportions; and conducting trial mixes to verify mix meets requirements. The end of document shows an example mix design calculation and results.
Abhishek khandelwal
This document discusses concrete mix design methods according to Indian standards. It describes the key steps in mix design as outlined in IS 10262:2009, including determining the target mean strength, selecting the water-cement ratio, calculating water and cement contents, selecting the coarse aggregate volume proportion, and reporting the final mix ratios. The example mix design provided has a water-cement ratio of 0.38, 518 kg of cement and 197 kg of water per cubic meter of concrete, with coarse and fine aggregate volumes of 0.664 m3 and 0.336 m3 respectively.
Mix design procedure road note 4
The document describes the Road Note No. 4 method for concrete mix design. It involves selecting proportions of ingredients including cement, water, fine aggregate and coarse aggregate to produce an economical concrete with sufficient workability, strength and durability. The method is based on extensive laboratory investigations of how factors like aggregate-cement ratio, water-cement ratio, grading and aggregate properties influence workability and strength. A six step procedure is outlined for mix design including determining compressive strength, selecting water-cement ratio, workability, grading aggregates, aggregate-cement ratio, and final mix proportions. An example problem demonstrates applying the method to design a mix meeting given requirements.
Concrete mix design
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Aci mix design very good
This document discusses the process of concrete mix design. The goal of mix design is to select ingredients and determine their proportions to produce concrete of a certain minimum strength and durability as economically as possible. The key steps involve determining the target mean strength based on site conditions, selecting a water-cement ratio based on strength and durability requirements, choosing the maximum aggregate size and desired workability, and then calculating the cement content, coarse aggregate weight, fine aggregate weight, and final mix proportions. Field conditions like surface moisture must also be accounted for in the final design.
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The document provides details on designing a concrete mix using the ACI method. It includes 8 steps: 1) choosing slump, 2) maximum aggregate size, 3) estimating water content and air content, 4) selecting water-cement ratio, 5) calculating cement content, 6) estimating coarse aggregate content, 7) estimating fine aggregate content, and 8) adjusting for moisture. An example is provided where the target is a 35 MPa compressive strength concrete with 50 mm slump. The method results in a mix with 190 kg of water, 395 kg of cement, 1020 kg of coarse aggregate, and 690 kg of fine aggregate per cubic meter of concrete.
Concrete Mix Design.pptx
This document outlines the Indian standard method for concrete mix design according to IS 10262-2009. The method involves 10 steps: 1) collecting data on design requirements, 2) determining target mean strength, 3) selecting water-cement ratio, 4) calculating water content, 5) determining cement content, 6) calculating coarse aggregate weight, 7) calculating fine aggregate weight, 8) combining coarse aggregate fractions, 9) determining mix proportions, and 10) adjusting for field conditions. An example is provided showing the application of these steps to design a concrete mix with a target mean strength of 38.25 MPa.
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This document discusses concrete mix design, including classifications, factors affecting design, and the step-by-step process for mix design as outlined in IS 10262-2009. It covers selecting a water-cement ratio based on strength and exposure requirements, estimating water content based on aggregate size and slump, calculating cementitious material content, and determining aggregate proportions to achieve the target mix. The final section notes that trial mixes should be tested to validate workability and strength before use in the field.
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This document provides details on concrete mix design according to Indian Standard IS 10262:2009. It discusses determining proportions of cement, water, fine aggregate, and coarse aggregate to produce concrete with specified properties like strength and durability at lowest cost. The key steps in mix design include: selecting water-cement ratio based on strength requirements; determining water content based on workability and aggregate type; calculating cement quantity based on water-cement ratio; estimating coarse and fine aggregate proportions; and conducting trial mixes to verify mix meets requirements. The end of document shows an example mix design calculation and results.
Abhishek khandelwal
This document discusses concrete mix design methods according to Indian standards. It describes the key steps in mix design as outlined in IS 10262:2009, including determining the target mean strength, selecting the water-cement ratio, calculating water and cement contents, selecting the coarse aggregate volume proportion, and reporting the final mix ratios. The example mix design provided has a water-cement ratio of 0.38, 518 kg of cement and 197 kg of water per cubic meter of concrete, with coarse and fine aggregate volumes of 0.664 m3 and 0.336 m3 respectively.
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The document describes the Road Note No. 4 method for concrete mix design. It involves selecting proportions of ingredients including cement, water, fine aggregate and coarse aggregate to produce an economical concrete with sufficient workability, strength and durability. The method is based on extensive laboratory investigations of how factors like aggregate-cement ratio, water-cement ratio, grading and aggregate properties influence workability and strength. A six step procedure is outlined for mix design including determining compressive strength, selecting water-cement ratio, workability, grading aggregates, aggregate-cement ratio, and final mix proportions. An example problem demonstrates applying the method to design a mix meeting given requirements.
Concrete mix design
This document provides details on the steps involved in cement concrete mix design. It begins by defining cement concrete mix design as determining the proportions of cement, water, fine aggregate, and coarse aggregate to produce concrete with specified properties like workability, strength, and durability at minimum cost. It then outlines 14 steps to conduct a mix design including determining material properties, selecting trial water-cement ratios, casting test cubes, and selecting the final mix based on compressive strength results. An example mix design is then shown for M30 grade concrete with 20mm maximum aggregate size and moderate exposure achieving a compressive strength of 390 kg/cm2.
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The document discusses concrete mix design. It defines concrete mix design as determining the proportions of ingredients like cement, fine and coarse aggregates to produce concrete with required strength, durability and workability at minimum cost. It discusses factors to consider in mix design like compressive strength, workability, water-cement ratio, maximum aggregate size. It also describes different types of mixes and methods of mix design. An example is given of designing a M40 concrete mix with fly ash suitable for pumping.
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The document provides definitions and test procedures for determining properties of concrete materials. It discusses tests to determine SSD bulk specific gravity and water absorption of coarse and fine aggregates, fineness modulus of fine aggregate, and rodded bulk density of coarse aggregate. It also outlines the steps to calculate a design mix for M25 grade concrete using test data for materials' properties and strengths. The design mix calculation involves selecting water-cement ratio, determining cement and aggregate contents, and quantities of materials for 1 cubic meter of concrete.CONCRETE Design mix
1. The document discusses mix design procedures for concrete.
2. Key steps include selecting a water-cement ratio of 0.5 based on the target compressive strength of 26.6 MPa, and choosing a water content of 191.6 kg/m3 and fine aggregate content of 31.5% of total aggregate based on tables.
3. Cement content is calculated as 383 kg/m3 based on the selected water-cement ratio of 0.5.
Concrete mix design
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2. An example mix design is provided for a 10-inch thick unreinforced pavement slab, following the 8 steps of the ACI method. This includes determining batch weights of 191.75 lbs of water, 625 lbs of cement, 1,936.2 lbs of coarse aggregate, and 1,188.3 lbs of fine aggregate.
3. The British Standard method of mix design is also briefly outlined, with steps including selecting target mean strength, water
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The American Concrete Institute (ACI) mix design method is a widely accepted approach for designing concrete mixes that ensure desired strength, workability, and durability for various construction applications. This method is detailed in the ACI Committee 211 documents, particularly ACI 211.1, "Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete." Here’s an overview of the ACI mix design method: Objectives of ACI Mix Design
Strength: Achieve the required compressive strength.
Workability: Ensure the mix is workable enough for proper placement and compaction.
Durability: Provide sufficient durability for the specific environmental conditions.
Steps in ACI Mix Design Method
1. Determine the Required Mix Parameters
Specified Compressive Strength (
𝑓
𝑐
′
f
c
′
): The strength that concrete is expected to achieve at 28 days.
Exposure Conditions: Evaluate conditions like freeze-thaw, sulfate exposure, and corrosion, which influence the durability requirements.
Maximum Aggregate Size: Decide based on the structure's size and reinforcement spacing.
Slump: Based on the type of construction and placement method.
2. Select the Water-Cement Ratio (W/C)
Use empirical relationships from ACI tables to select the water-cement ratio based on the required compressive strength and durability considerations.
3. Estimate the Water Content
Estimate the amount of water required per unit volume of concrete for the chosen slump and maximum aggregate size. ACI provides tables for this.
4. Calculate the Cement Content
Determine the amount of cement required by dividing the estimated water content by the selected water-cement ratio.
5. Estimate Coarse Aggregate Content
Estimate the volume of coarse aggregate based on the maximum aggregate size and the fineness modulus of the fine aggregate using ACI tables.
6. Calculate Fine Aggregate Content
Fine aggregate content is determined by subtracting the volume of cement, water, and coarse aggregate from the total volume of concrete.
7. Adjust for Aggregate Moisture
Adjust the batch weights of aggregates to account for their moisture content. This ensures that the water added to the mix is the actual water needed for the mix design, not water absorbed by aggregates.
8. Trial Batches and Adjustments
Prepare trial batches to verify that the mix meets the required workability, strength, and durability. Adjust the mix proportions if necessary based on trial results.
Example Calculation
Here is an example to illustrate the ACI mix design process:
Required Parameters:
Specified Compressive Strength: 4000 psi (28 MPa)
Exposure Condition: Moderate exposure
Maximum Aggregate Size: 1 inch (25 mm)
Slump: 3 inches (75 mm)
Water-Cement Ratio:
For 4000 psi, use a W/C ratio of 0.50 (from ACI tables).
Water Content:
For 1-inch aggregate and 3-inch slump, estimated water content is 305 lb/yd³ (180 kg/m³).
Cement Content:
Cement content = Water content / W/C ratio
Cement content = Water content / W/C r
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The document provides definitions and test procedures for determining properties of concrete materials. It discusses tests to determine SSD bulk specific gravity and water absorption of coarse and fine aggregates, fineness modulus of fine aggregate, and rodded bulk density of coarse aggregate. It also outlines the steps to calculate a design mix for M25 grade concrete using test data for materials' properties and strengths. The design mix calculation involves selecting water-cement ratio, determining cement and aggregate contents, and quantities of materials for 1 cubic meter of concrete.CONCRETE Design mix
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The document discusses concrete mixing and proportioning. It describes the components of concrete including cement, aggregates, and water. It provides proportions for different classes of concrete mixtures using volumetric measurements of cement, sand, gravel, and water. Guidelines are given for ensuring workability, strength, durability, and economy in concrete mixes. Conversion tables from inches to meters are also included.
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This document discusses concrete mix design and provides definitions, considerations for placeability and design purposes. It outlines several methods for proportioning mixes, including the DOE method. An example is given to demonstrate the DOE method, showing steps to determine water-cement ratio, cement and aggregate contents based on given design criteria like strength, slump and aggregate properties. Tables and figures provide additional data on compressive strengths, water needs for workability, durability requirements and aggregate proportions.
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Lecture4 ACI MIX DESIGN and Steps in.pdf
The American Concrete Institute (ACI) mix design method is a widely accepted approach for designing concrete mixes that ensure desired strength, workability, and durability for various construction applications. This method is detailed in the ACI Committee 211 documents, particularly ACI 211.1, "Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete." Here’s an overview of the ACI mix design method: Objectives of ACI Mix Design
Strength: Achieve the required compressive strength.
Workability: Ensure the mix is workable enough for proper placement and compaction.
Durability: Provide sufficient durability for the specific environmental conditions.
Steps in ACI Mix Design Method
1. Determine the Required Mix Parameters
Specified Compressive Strength (
𝑓
𝑐
′
f
c
′
): The strength that concrete is expected to achieve at 28 days.
Exposure Conditions: Evaluate conditions like freeze-thaw, sulfate exposure, and corrosion, which influence the durability requirements.
Maximum Aggregate Size: Decide based on the structure's size and reinforcement spacing.
Slump: Based on the type of construction and placement method.
2. Select the Water-Cement Ratio (W/C)
Use empirical relationships from ACI tables to select the water-cement ratio based on the required compressive strength and durability considerations.
3. Estimate the Water Content
Estimate the amount of water required per unit volume of concrete for the chosen slump and maximum aggregate size. ACI provides tables for this.
4. Calculate the Cement Content
Determine the amount of cement required by dividing the estimated water content by the selected water-cement ratio.
5. Estimate Coarse Aggregate Content
Estimate the volume of coarse aggregate based on the maximum aggregate size and the fineness modulus of the fine aggregate using ACI tables.
6. Calculate Fine Aggregate Content
Fine aggregate content is determined by subtracting the volume of cement, water, and coarse aggregate from the total volume of concrete.
7. Adjust for Aggregate Moisture
Adjust the batch weights of aggregates to account for their moisture content. This ensures that the water added to the mix is the actual water needed for the mix design, not water absorbed by aggregates.
8. Trial Batches and Adjustments
Prepare trial batches to verify that the mix meets the required workability, strength, and durability. Adjust the mix proportions if necessary based on trial results.
Example Calculation
Here is an example to illustrate the ACI mix design process:
Required Parameters:
Specified Compressive Strength: 4000 psi (28 MPa)
Exposure Condition: Moderate exposure
Maximum Aggregate Size: 1 inch (25 mm)
Slump: 3 inches (75 mm)
Water-Cement Ratio:
For 4000 psi, use a W/C ratio of 0.50 (from ACI tables).
Water Content:
For 1-inch aggregate and 3-inch slump, estimated water content is 305 lb/yd³ (180 kg/m³).
Cement Content:
Cement content = Water content / W/C ratio
Cement content = Water content / W/C r
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- 2. DOE Method ⦁ The DOE method was first published in 1975 and then revised in 1988. ⦁ While Road Note No 4 or Grading Curve Method was specifically developed for concrete pavements, the DOE method is applicable to concrete for most purposes, including roads. ⦁ Since DOE method presently is the standard British method of concrete mix design, the procedure involved in this method is described instead of out dated Road Note No 4 method.
- 3. Step 01: Data to be collected ⦁ Fineness modulus of selected F .A. ⦁ Unit weight of dry rodded coarse aggregate. ⦁ Sp.gravity of coarse and fine aggregates in SSD condition ⦁ Absorption characteristics of both coarse and fine aggregates. ⦁ Specific gravity of cement. Example:
- 4. Step 01: Data to be collected ⦁ Grade Designation = M 30 ⦁ T ype of cement = O.P .C- 43 grade ⦁ FineAggregate = Zone-II ⦁ Sp.Gravity Cement = 3.15 ⦁ FineAggregate = 2.61 ⦁ CoarseAggregate (20mm) = 2.65 ⦁ CoarseAggregate (10mm) = 2.66
- 5. Step 02: Target Mean Strength ⦁ Find the target mean strength from the specified characteristic strength Target mean strength = specified characteristic strength + Standard deviation x risk factor ⦁ (risk factor is on the assumption that 5 percent of results are allowed to fall less than the specified characteristic strength). 𝑓𝑚= 30 + 1.65 𝑥 5.0 𝑓𝑚= 38.25 𝑀𝑃𝑎
- 6. Step 03: Water/cement ratio ⦁ Calculate the water/cement ratio. This is done in a rather round about method,usingT able 11.11 and Fig.11.3
- 7. Step 03: Water/cement ratio Referring to T able 11.11, for OPC, uncrushed aggregate, for W/C ratio of 0.5, 28 days compressive strength is 49 MPa. In Fig. 11.3 find an intersection point for 42 MPa and 0.5 W/C ratio. Draw a dotted line curve parallel to the neighbouring curve. From this curve read off the W/C ratio for a target mean strength of 39 MPa. TheWater/cement ratio is = 0.58 Check this W/C ratio from durability consideration from T able 9.20. The maximum W/C ratio permitted is 0.50. Adopt lower of the two Therefore adoptW/C ratio of 0.50
- 8. Step 03: Water/cement ratio
- 9. Step 04: Calculation of Water Content 2 1 2 1 ⦁ Next decide the water content for slump of 75 mm (assumed) 20 mm uncrushed aggregate fromT able 11.12. ⦁ In case of CA & FA are different ⦁ Water demand for natural fine aggregate = 195 lit ⦁ Water demand for crushed coarse 20mm max size aggregate = 225 lit 𝑊𝑎𝑡𝑒𝑟 𝐶𝑜𝑛𝑡𝑒𝑛𝑡 = 3 × 𝑊𝑓 + 3 × 𝑊 𝑐𝑎 𝑊𝑎𝑡𝑒𝑟 𝐶𝑜𝑛𝑡𝑒𝑛𝑡 = 3 × 195 + 3 × 225 = 205.0 𝑘𝑔/𝑚3
- 10. Step 04: Calculation of Water Content
- 11. Step 05: Cement Content ⦁ Mixing water content is 205 kg/m3 of concrete. 𝐶𝑒𝑚𝑒𝑛𝑡 𝐶𝑜𝑛𝑡𝑒𝑛𝑡 = 205 0.50 𝐶𝑒𝑚𝑒𝑛𝑡 𝐶𝑜𝑛𝑡𝑒𝑛𝑡 = 410.0 𝑘𝑔/𝑚3 ⦁ Which is more than 350 kg (As perT able No. 9.2 of BS 8110 : Part I :1985 ) Hence o.k.
- 12. Step 06: Weight of Total Aggregate ⦁ This requires an estimate of the wet density of the fully compacted concrete. This can be found out from Fig. 11.4 for approximate water content and specific gravity of aggregate. ⦁ Next, find out the density of fresh concrete from Fig.11.4 for water content of 205 kg/m3, 20 mm uncrushed aggregate of sp.gr .2.65 𝑇𝑒 𝑤𝑒𝑡 𝑑𝑒𝑛𝑠𝑖𝑡𝑦 = 2375.0 𝑘𝑔/𝑚3
- 13. Step 06: Weight of Total Aggregate
- 14. Step 06: Weight of Total Aggregate ⦁ T otalWeight of aggregate is find out ⦁ 𝑊𝑒𝑖𝑔𝑡 𝑜𝑓 𝑇𝑜𝑡𝑎𝑙 𝐴𝑔𝑔𝑟𝑒𝑔𝑎𝑡𝑒 = 𝑇𝑒 𝑤𝑒𝑡 𝑑𝑒𝑛𝑠𝑖𝑡𝑦 − 𝑊𝑒𝑖𝑔𝑡 𝑜𝑓 𝐶𝑒𝑚𝑒𝑛𝑡 + 𝑊𝑒𝑖𝑔𝑡 𝑜𝑓 𝐹𝑟𝑒𝑒 𝑊𝑎𝑡𝑒𝑟 ⦁ 𝑊𝑒𝑖𝑔𝑡 𝑜𝑓 𝑇𝑜𝑡𝑎𝑙 𝐴𝑔𝑔𝑟𝑒𝑔𝑎𝑡𝑒 = 2375 − 410 + 205 = 1760 kg/m3
- 15. Step 07: Weight of Fine Aggregate ⦁ Then, proportion of fine aggregate is determined in the total aggregate using Fig. 11.5. Fig. 11.5(a) is for 10 mm size, 11.5(b) is for 20 mm size and Fig. 11.5(c) is for 40 mm size coarse aggregate. ⦁ The parameters involved are maximum size of coarse aggregate, the level of workability, the water/cement ratio, and the percentage of fine spassing 600 μ seive. ⦁ For 20 mm aggregate size, W/C ratio of 0.50, Slump of 75 mm, for 50% fines passing through 600 μ sieve,the percentage of % 𝐹𝑖𝑛𝑒 𝐴𝑔𝑔𝑟𝑒𝑔𝑎𝑡𝑒 = 41 %
- 16. Step 07: Weight of Fine Aggregate
- 17. Step 07: Weight of Fine Aggregate
- 18. Step 07: Weight of Fine Aggregate
- 19. Step 07: Weight of Fine Aggregate 𝑊𝑒𝑖𝑔𝑡 𝑜𝑓 𝐹 𝐴. = 1760 × 41 100 = 721.6 𝑘𝑔/𝑚3 And 𝑊𝑒𝑖𝑔𝑡 𝑜𝑓 𝐶 𝐴. = 1760 × 59 100 = 1038.4 𝑘𝑔/𝑚3
- 20. Step 08: Combination of Different Coarse Aggregate Fractions ⦁ Course aggregate can be further divided into different fractions depending on the shape of aggregate. As a general guidance the figures given inT able 11.14 can be used.
- 21. Step 09: Proportions Ingredients Cement Fine Aggregate Coarse Aggregate Water Chemical Quantity 𝑘𝑔/𝑚3 410.0 721.6 1038.4 205.0 NM Ratio 1.00 1.76 2.54 0.50 NM 1 Bag Cement 50.0 88.0 127.0 25.0 NM
- 22. Step 10: Adjustment for Field Condition ⦁ The proportions are required to be adjusted for the field conditions. FineAggregate has surface moisture of 2 % Weight of F .A.= 721.6 + 2 100 721.6 = 736.03 kg/m3 ≅ 738.00 kg/m3 ⦁ CourseAggregate absorbs 1% water Weight of C.A. = 1038.4 − 1 100 1038.4 = 1028.00 kg/m3 ≅ 1029.10 kg/m3
- 23. Step 10: Final Design Proportions Ingredients Cement Fine Aggregate Coarse Aggregate Water Chemical Quantity 𝑘𝑔/𝑚3 410.0 728.0 1029.1 205 NM Ratio 1.00 1.80 2.51 0.50 NM 1 Bag Cement 50.0 90.0 125.5 25.0 NM