fly ash,silicafume,blast furnace etc
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This document discusses different types of mineral admixtures that can be used in concrete, including fly ash, blast furnace slag, silica fume, rice husk ash, and volcanic ash. Mineral admixtures are fine ground materials like fly ash, silica fume, and slag that are either pozzolanic, cementitious, or both. Fly ash is a byproduct of coal combustion in power plants that reduces the heat of hydration in concrete. Blast furnace slag is prepared through metallurgical processes and reacts with cement. Silica fume is produced from silicon metal production and increases concrete strength and durability. Rice husk ash comes in black or white forms and increases cement strength and
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Fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), Metakaolin (MK), and rice husk ash (RHA)
Possess certain characteristics through which they influence the properties of concrete differently.
Effect of mineral admixtures on the properties of fresh concrete is very important as these properties may affect the durability and mechanical properties of concrete.
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Dr. J D Bapat gave a presentation at a workshop on concrete mix design organized by Sanjivani College of Engineering. The presentation discussed the durability of concrete when using mineral admixtures like fly ash. Over 120 students and faculty attended the workshop and asked questions about topics like internal curing, converting rice husk to ash, translucent concrete, and reasons for stickiness when fly ash replacement is high. Dr. Bapat also announced a two-day training course on durable, high performance cement and concrete with mineral and chemical admixtures regularly held in Pune and other locations.
Using tyres wastes as aggregates in concrete to form rubcrete – mix for engin...
Abstract This paper presents the results, obtained after replacement of fine and coarse aggregates, in concrete mix, with tyre rubber. The tyre rubber, which has been used in the present study, is obtained after the mechanical trituration process of post – consumed tyres from trucks. Researchers have investigated, over the years, the use of recycled tyre rubber waste as a replacement for aggregate in concrete and its effectiveness. “Rubcrete-Mix” which would result from such replacement is found to have many engineering applications and holds promise in future. Rubcrete also possesses good mechanical properties and is considered to be one of the best and economical ways of recycling the used tyres. The present experimental study has the aim of arriving at the optimum quantity of the replacement material for the aggregates in concrete mixtures, for various engineering applications. For achieving a proper bond with the surrounding concrete paste, the recycled aggregates have been designed with respect to their size, shape and gradation. With the water – cement ratio being kept constant fine and coarse aggregate has been replaced with tyre rubber powder and chipped rubber and also cement has been replaced with silica fume. In preparing the concrete, Portland slag cement has been used along with super plasticizer less than 1% by weight of cement to achieve required workability of the resulting concrete. Furthermore, durability studies have been conducted and mixes have been designed for M30 grade concrete. Keywords: Concrete Mix, Mechanical Properties, Rubber Powder, Chipped Rubber, Silica fume.
Effect of robo sand on strength characteristic of recycled aggregate concrete
Abstract
With increased depletion of natural construction materials, alternative means must be sought for substitution of the same. Excessive energy consumption in the production of construction materials, environmental setbacks and debris disposal are some of the other burning issues fuelling the need for reuse of the raw materials. With the need of natural sand, there is an urgent need for a product that matches the properties of natural sand in concrete. Construction- Demolition waste and ROBO Sand are some of the upcoming resources which enables effective replacement of the materials of mineral origin. In the present work, natural coarse aggregate was replaced with recycled coarse aggregate and river sand was replaced with ROBO Sand in different percentages in plain cement concrete. Different strength test were conducted with combination of ROBO Sand and recycled aggregate to study the effect of these two materials on strength Concrete with a characteristic compressive strength of 30 N/mm2 (M30 grade), was used for our study. In total, 16 sets of 6 cubes each were cast and tested.
Keywords: ROBO Sand, recycled aggregate
An Experimental Study on Durability of Concrete Using Fly Ash & GGBS for M30 ...
Concrete when subjected to severe environments its durability can significantly decline due to
degradation. Degradation of concrete structures by corrosion is a serious problem and has major economic
implications. In this study, an attempt has been made to study the durability of concrete using the mineral
admixtures like Fly Ash & Ground Granulated Blast Furnace Slag (GGBS) for M30 grade concrete.Cube
Specimens were casted and are immersed in normal water, sea water, H2SO4 of various concentrations and were
tested after 7 days, 28 days & 60 days.
Vidhi seminar
This document discusses different types of concrete admixtures, including air entraining admixtures, plasticizers, superplasticizers, retarders, accelerators, and coloring admixtures. Concrete admixtures are added to concrete mixes to impart desirable properties. Air entraining admixtures introduce tiny air bubbles that increase frost and scaling resistance. Plasticizers and superplasticizers reduce the water content needed for workability or increase workability at the same water content. Retarders slow hydration for longer workability, while accelerators speed strength development. Coloring admixtures are used for aesthetics and safety. Admixtures can modify properties like workability, strength, permeability and curing time.
Partial replacement of Fine aggreggate by Copper Slag and Cement by Fly Ash
The document summarizes research on replacing fine aggregate with copper slag and cement with fly ash in concrete. It provides background on copper slag and fly ash, including their composition and how they are produced. It then reviews several previous studies that investigated replacing fine aggregate with copper slag at levels from 5-100% and cement with fly ash at 20-60%. The studies found that compressive, tensile and flexural strength generally increased up to around 40% replacement. The document aims to further study the effects of these replacements on concrete strength and properties.
11 1 wan-brief intro use of mineral admixture in concrete
This document presents information on the use of mineral admixtures in concrete. It discusses various mineral admixtures including fly ash, blast furnace slag, silica fume, and rice husk ash. Fly ash and blast furnace slag are byproducts that have pozzolanic or cementitious properties. When used as partial replacements for cement in concrete, mineral admixtures can improve workability, reduce heat of hydration, and increase long-term strength and durability. The document also notes that combining different mineral admixtures, such as fly ash and silica fume, can further optimize concrete properties.
BUILDING CONSTRUCTION SPECIAL CONCRETE
BUILDING CONSTRUCTION SPECIAL CONCRETEHamzah Meraj, Faculty of Architecture, Jamia Millia Islamia, New delhi
SPECIAL CONCRETE-Lightweightconcretehasstrengthscomparabletonormalweightconcrete,yetistypically25%to35%lighter.
•Madewithlightweightaggregates.
•FormedasaresultofreactionofAluminiumona
1.Proportionateblendoflime,
2.Cement&Flyash,
3.ThehydrogengasthatescapescreatesmillionsoftinyaircellsgivingitastrongCellularstructurewhichisfurtherstrengthenedbyhighpressuresteamcuring
Lightweightaggregatesusedinlightweightconcretearetypicallyexpandedshale*,clayorslatematerialsthathavebeenfiredinarotarykilntodevelopaporousstructure....
TYPES OF SPECIAL CONCRETE
1.High Volume Fly Ash Concrete.
2.Silica fume concrete.
3.GGBS, Slag based concrete.
4.Ternary blend concrete.
5.Light weight concrete.
6.Polymer concrete.
7.Self Compacting Concrete.
8. Coloured Concrete.
9.Fibre-reinforced Concrete.
10. Pervious Concrete.
11.Water-proof Concrete.
12.Temperature Controlled Concrete.ACID RESISTANCE CONCRETE USING SILCA FUME
This document outlines a study on developing an acid-resistant concrete mix using silica fume. The objectives are to evaluate the optimum silica fume content to control compressive strength, investigate the effect of sulfuric acid environments on strength at different silica fume replacements, and conduct experiments to determine changes in weight, strength and appearance of specimens exposed to acid. Three concrete mixes with silica fume replacements of 4%, 8% and 15% will be tested for compressive strength in acid and normal curing conditions at various ages. The results will determine the effect of silica fume on strength in acid, optimum silica fume content for different grades of concrete in acid environments.
Recycled concrete aggregate
This document discusses recycled concrete aggregate (RCA) which is obtained from construction and demolition waste such as broken concrete, bricks, and road pavement. Using RCA provides benefits such as conserving natural resources, reducing construction waste, and saving money. The process of making RCA involves breaking, crushing, sorting, and stockpiling waste concrete. Tests on RCA show properties similar to natural aggregate, including lower strength reductions of only 2-14% compared to natural aggregate concrete. While RCA can be a viable construction material, more research is still needed to fully implement its use.
Ground floor
The document discusses different types of flooring materials and construction methods. It describes the purposes of floors and factors to consider when selecting materials, such as cost, appearance, durability, moisture resistance, sound insulation and fire resistance. Various flooring materials are then outlined, including brick, flagstone, concrete, terrazzo, mosaic, tile and marble flooring. Construction techniques are provided for each type of flooring.
CHEMICAL ADMIXTURES FOR CONCRETE
The document discusses various types of chemical admixtures used for concrete, including plasticizers, superplasticizers, retarders, accelerators, and air-entraining admixtures. It explains that admixtures can modify the properties of fresh and hardened concrete by altering workability, strength development, permeability, and durability. Superplasticizers in particular are highlighted as they can significantly reduce water content and increase workability and strength. The document concludes that superplasticizers and air-entraining admixtures are most commonly used, and that superplasticizers allow for reduced cement and increased construction of large structures.
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Using tyres wastes as aggregates in concrete to form rubcrete – mix for engin...
Using tyres wastes as aggregates in concrete to form rubcrete – mix for engin...
Effect of robo sand on strength characteristic of recycled aggregate concrete
Effect of robo sand on strength characteristic of recycled aggregate concrete
An Experimental Study on Durability of Concrete Using Fly Ash & GGBS for M30 ...
An Experimental Study on Durability of Concrete Using Fly Ash & GGBS for M30 ...
Partial replacement of Fine aggreggate by Copper Slag and Cement by Fly Ash
Partial replacement of Fine aggreggate by Copper Slag and Cement by Fly Ash
11 1 wan-brief intro use of mineral admixture in concrete
11 1 wan-brief intro use of mineral admixture in concrete
Similar to fly ash,silicafume,blast furnace etc
CON 123 - Session 1 - Introduction
This document provides an introduction to cementitious materials. It defines cementitious materials as any material with cementing properties that contributes to the formation of hydrated calcium silicate compounds. It then discusses the main types of cementitious materials including Portland cement, blended cements, performance cements, slag cement, fly ash, and silica fume. The document provides brief overviews of the manufacturing processes and typical compositions and uses of these materials. It concludes with a brief historical overview of the development of cement from ancient times through the modern Portland cement.
coke and metallurgical coal
Coke is a porous, high-strength carbon material produced by heating coal in ovens without oxygen. It is a key material used in blast furnaces for ironmaking. Metallurgical coke is made specifically from bituminous coal that can withstand high heat and pressures. The coking process involves heating coal to around 2000°F for 12-36 hours to drive off impurities. Coke is then used as both a fuel and reducing agent in blast furnaces, where its combustion produces carbon monoxide to reduce iron ore into molten iron. High quality coke is necessary to support blast furnace operations and produce quality iron.
Cement industry
This document provides an overview of the cement manufacturing process. It discusses the key raw materials used like limestone, clay, and iron oxide. The manufacturing process involves mixing and crushing raw materials, burning the mixture at high temperatures to form clinker, and grinding the clinker along with gypsum. The functions of various constituents in cement are also described. Finally, common applications and advantages/disadvantages of cement are summarized.
Cement
The document discusses the manufacturing process of cement. It begins with crushing and mixing of raw materials such as limestone, clay, and iron ore. The raw materials are then heated in a kiln to form clinker. Clinker is ground into a fine powder to produce cement. When mixed with water, cement undergoes chemical reactions that result in hardening over time as it hydrates. The hydration process involves calcium silicates and aluminates reacting with water to form compounds like calcium silicate hydrate and calcium aluminate hydrates.
types and manufacturing of cement
Cement is topic;like and give credit for my free work
cement
cement and its types
Manufacturing of cement
uses of cement
wet process
dry process
portland cement
raw materials used in cement
field tests for cement
project report bsl
The document provides information about Bokaro Steel Plant in India. It was established in 1965 in collaboration with the Soviet Union. The plant produces flat steel products like hot rolled coils, sheets, and galvanized sheets. It has a raw material handling plant, sinter plant, coke oven plant, 5 blast furnaces, and steel making and continuous casting facilities. The raw material handling plant receives and stores raw materials. The sinter plant agglomerates iron ore fines for use in the blast furnaces. Coke ovens convert coal into coke fuel for blast furnaces. The blast furnaces produce molten pig iron, which is then processed into steel in the steel making shop and cast into slabs in the continuous casting
Pretreatment of hot metal
Pre-treatment of hot metal involves removing silicon, phosphorus, and sulfur to produce high quality steel. It is done between the blast furnace and basic oxygen furnace. Desiliconization removes excess silicon using oxidizing agents and fluxes to produce a neutral slag. Dephosphorization requires oxidizing conditions and a basic slag to remove phosphorus after silicon removal. Desulphurization uses reagents like lime, calcium carbide, and magnesium injected through lances to convert sulfur to slag. Dip lance injection is a reliable method to reduce sulfur levels to 0.001%. Proper removal of sulfur-rich slag and refractory development are areas of ongoing work.
Bm cement ppt
The document discusses the history and development of Portland cement. It notes that John Smeaton discovered that a mixture of lime, clay and iron slag produced a mortar that hardened under water in 1759. Joseph Aspdin patented "Portland Cement" in 1824, calling it such because the concrete resembled Portland stone. Isaac Johnson further developed modern Portland cement in 1845 by firing chalk and clay at higher temperatures. Key later developments included the use of rotary kilns, addition of gypsum to control setting, and ball mills for grinding. The document then discusses the chemical and physical properties of cement, different cement grades, and testing and storage of cement.
Cement class 12 notes of cement chapter.pdf
Cement is produced through a process involving crushing and grinding raw materials such as limestone and clay, heating the materials in a kiln to form clinker, cooling and grinding the clinker, and adding gypsum. The main raw materials used are limestone, clay, iron oxide, and aluminum oxide. During the heating process in a rotary kiln, the raw materials undergo chemical reactions to form calcium silicates and calcium aluminates which fuse together to form clinker. Gypsum is added to the ground clinker to regulate the setting time of cement.
Cement
Gypsum and cement are important building materials. Gypsum naturally occurs as the mineral calcium sulfate dihydrate (CaSO4·2H2O) and is used to make plaster of Paris, Keene's plaster, and estrich plaster. When heated, gypsum undergoes dehydration and produces hemihydrate and anhydrite. Plaster of Paris is made from hemihydrate and sets quickly when mixed with water. Keene's plaster contains anhydrite and sets more slowly. Cement is produced by heating limestone and clay at high temperatures, resulting in compounds like dicalcium silicate that harden when mixed with water.
Brick - " GOOD for construction but BAD for environment "
Building material, BRICKS as per is codes. it basically covers all the aspects of brick right from manufacturing to finishing and stats to improvement can or needed to be done.
This is all u need to go through to understand the concept of bricks. 2k17
Cement
Cement is a powdery material that binds other materials together when mixed with water. It is made through a process of crushing raw materials like limestone, mixing them into a slurry or powder, burning the mixture in a kiln, and finely grinding the resulting clinker. The most common type is Portland cement, which is a finely ground powder that sets and hardens through chemical reactions with water. Cement is widely used in construction for buildings, infrastructure, and other applications due to its ability to form strong structures and conform to various shapes.
cement.pptx
Cement is produced through a six phase process: (1) Raw material extraction from quarries, (2) Grinding and blending the materials, (3) Pre-heating the materials in a cyclone pre-heater, (4) Baking the materials in a kiln at over 1450°C to form clinker, (5) Cooling and final grinding of the clinker, (6) Packing the cement in bags or shipping in bulk. The presentation provides details on each phase of the cement production process from raw material extraction to final packing and shipping.
Manufacturingofbricks 140421135303-phpapp02
Clay is a key ingredient in making structural clay products like bricks. It consists mainly of kaolinite along with other minerals. Good brick earth contains 20-30% alumina, 50-60% silica, and small amounts of lime, iron oxide, and magnesia. Harmful ingredients to avoid include alkalis, limestone, iron pyrites, pebbles, and organic matter. Bricks are manufactured by preparing the earth, moulding, drying, and burning in kilns. Common brick bonds used in construction include stretcher bond, header bond, English bond, and Flemish bond.
Iron and steel industry 2008
This document summarizes an exam question from a past paper on the iron and steel industry in Pakistan. The question asks the student to: 1) Identify raw materials and inputs shown in a diagram of inputs to Pakistan Steel; 2) Describe two human inputs to production; 3) Explain why over 50% of Pakistan Steel's output is sent north to Punjab; and 4) Identify features showing it is a formal sector industry. The question tests the student's understanding of the key raw materials, processes, outputs and location factors of Pakistan's iron and steel industry.
Cement
Cement is a binder made from limestone and clay that sets and hardens after mixing with water. It is used in construction to bind materials like bricks, stones, and tiles. There are two main types of cement: non-hydraulic cement which hardens through a carbonation reaction with carbon dioxide in air, and hydraulic cement like Portland cement which hardens through a hydration reaction with water. Hydraulic cements include natural cement, pozzolana cement, slag cement, high alumina cement, and Portland cement which is the most common type used today. Portland cement is made by heating a mixture of limestone and clay to nearly 1400°C.
Cement- presentation
This document provides information about cement, including its history, definition, manufacture, and composition. It discusses the four main processes used to manufacture cement: wet, semi-wet, semi-dry, and dry. The wet and dry processes are described in more detail. It also summarizes the classification of cements as hydraulic or non-hydraulic, and provides examples of their applications. Finally, it outlines the key functions of cement and its main constituent materials like lime, silica, alumina, and others.
Steel making process
The steel making process involves three main stages:
1) Preparing iron ore by removing impurities through washing, crushing, and sieving.
2) Using a blast furnace to heat iron ore, coke, and limestone above 1500°C to produce pig iron.
3) Further processing pig iron in a converter to reduce its carbon content and remove impurities by adding oxygen and scrap, producing the final liquid steel.
Ceramic industries
Ceramic industries
Cement
Manufacturing Process of Portland Cement
Crushing
Mixing wet process
Grinding
Kiln
Grinding
Storage and packaging
Silicon carbide
Silicon carbide, also known as carborundum, is a compound of silicon and carbon that occurs naturally as the mineral moissanite. It was first produced synthetically in 1891 by Edward Acheson while attempting to make diamond. Silicon carbide exists in many crystalline forms called polytypes, with alpha silicon carbide being the most common. It has excellent physical properties like high hardness, thermal conductivity, resistance to acids and alkalis. Silicon carbide is produced commercially by heating quartz sand and carbon in an electric resistance furnace above 2000°C. It has many applications due to its properties, including use as an abrasive, in automotive brakes and clutches, semiconductors, heating elements
Similar to fly ash,silicafume,blast furnace etc (20)
Brick - " GOOD for construction but BAD for environment "
Brick - " GOOD for construction but BAD for environment "
fly ash,silicafume,blast furnace etc
- 2. Mubashir shaheryar Roll no#15 Section A Assignment# 1 Mineral Admixtures; Silica Fume, Fly ash ; Blast Furnace Slag, Rice husk ash; Volcanic ash
- 3. MINERAL ADMIXTURES • Mineral admixtures are fine grinded materials like fly ash, silica fume, slag etc. The mineral admixtures are: Pozzolanic (Low-calcium ) • -Cementitious (Granulated iron blast-furnace slag) • -Both pozzolanic and cementitious (Highcalcium) • -Natural materials (Volcanic Ash)
- 4. FLY ASH • DEFINITION: Fly ash is a by-product of the combustion of coal in thermal power plants. The dust system removes the fly ash,as a fine residue, from the combustion gases before they are discharged into the atmosphere. EFFECT ON HEAT OF HYDRATION: Replacement of cement by fly ash results in a reduction in the temperature rise in fresh Concrete. This is particular importance in mass concrete where cooling, following a large temperature rise, can lead to cracking
- 5. BLAST FURNACE SLAG • PREPARATION: Blast furnace slag is basically prepared in blast furnace by metallurgical process in which iron ore ,coke, flux [limestone or dolomite] is added.In slag formation lime in the flux chemically reacted with aluminates and silicates present in ore to a non metallic product called blast furnace slag.
- 7. SILICON FUME • DEFINITION: silicon fume is by product of producing silicon metal.It is produced in electric arc furnace. USES: It is used in concrete to increase its strength and durability.It is very reactive form of pozzolan.
- 9. RICE HUSK ASH • Rice husk ash is a pozzolanic material.It gives strenght to cement and increases the durability of concrete.Rice husk ash has different form black ,white.Black rice husk ash is formed by incomplete combustion of carbon while white rice husk ash is formed by complete combustion of carbon.
- 10. VOLCANIC ASH • DEFINITION: It is very small solid particles ejected from volcano during the blast which have intermediate axes 2mm or less. USES: It is used in making portland cement by mixing with quicklime . Volcanic ash is used as admixture in concrete and cement