Fly ash used is of type class c with a specific gravity of 2. Mechanical and durability properties of bricks were studied. Class c and f fly ash having intermediate lime class f fly ash having low lime use of fly ash according to is. Fly ash bricks and comparison with clay bricks composition, uses. As the manufacture of clay fly ash bricks and lime fly ash bricks need higher investment, the manufacture of falg bricks can be well accepted by small scale entrepreneurs. Those cements were made near the small italian town of pozzuoli which later gave its name to the term pozzolan. Production of sustainable clay bricks using waste fly ash. There are basically four types, or ranks, of coal, each of which varies in terms of its heating value, its chemical composition, ash content, and geological origin. It is produced when the combustion temperature is below 900o c.
Fly ash bricks can be extensively used in all building constructional activities similar to that of common burnt clay bricks. The object of this project is to represent the information regarding fly ash bricks and plant, properties and their uses in a most concise, compact and to the point manner. Pdf characteristics of compacted fly ash bricks and fly ash brick. Influence of fly ash on brick properties and the impact of. This paper presents fly ash brick properties, manufacturing process material required for preparing the clay bricks and fly ash bricks as per indian standard code provisions, inspection and. The physical and chemical properties of fly ash are tabulated below. In this research, the consumption of fly ash in burnt clay bricks was investigated for the manufacturing of sustainable bricks. So the demand for this product will increase in the future. Studies of the properties of paver block using fly ash. The properties of fly ash can greatly affect the properties for both fresh concrete and hardened concrete. Fly ash based building blocks are suitable for use in masonry similar to burnt clay bricks.
Use of fly ash as a raw material for the production of building bricks is not only viable alternative to. Fly ash booklet for pdf federal highway administration. Fly ash bricks are hitech wellimproved quality bricks used for construction of brick masonry structures. Table 1 shows the chemical composition of fly ash from two different sites. Thermal properties of fly ash bricks lingbawan the. Fly ash bricks are made of waste materials which come from the combustion of coal in thermal power plants. In the united states, astm c 6181, standard specification for coal fly ash and. Currently, over 20 million metric tons 22 million tons of fly ash are used annually in a variety of engineering applications. In this study, the thermal conductivity, specific heat capacity, and thermal.
Ubco engr 325 project presentation on fly ash in concrete. Moreover, fly ash bricks have been produced with a naturally occurring reddish colour similar to that of normal clay bricks. Environmental properties of fly ash bricks ash library. Chapter 1 fly ash an engineering material fly ash facts. Coal fly ash is a coal combustion product that has numerous applications in highway construction. The calcium content of the fly ash is perhaps the best indicator of how the fly ash will behave in concrete thomas 1999, although other compounds such as the alkalis. Advantages and disadvantage of fly ash bricks online civilforum. Tests on bricks made of 100% fly ash manufactured using a technology similar to those used in normal clay bricks, has shown that their mechanical properties exceed those of the best clay bricks in the australian market. Fly ash properties and uses monolithic dome institute. Fly ash has a much lower density than cement, therefore samples with a higher percentage of fly ash had lower densities and subsequently lower thermal conductivities. The fly ash bricks are comparatively lighter in weight and stronger than. Fly ash is a fine grey amorphous powder, rich in silica and alumina. Studies of the properties of paver block using fly ash ritesh mall1 sharda shrama2 prof. Bricks of different clay and fly ash mixing proportions were molded.
How ever this unit is basically bas on fly ash and cement. Since the first edition of fly ash facts for highway engineers in 1986, the use of fly ash in. I fired bricks from fly ash university of illinois. The chemical properties of fly ash are influenced to a great extent by those of the coal burned and the techniques used for handling and storage. The fly ash bricks are comparatively lighter in weight and stronger than common clay bricks. It is nowadays used in cement, concrete and other cement based applications in india. Compressive strength of fly ash brick with addition of lime, gypsum and quarry dust a. The new bricks and process have been given the name fly ash bricks. Utilization of fa in brick production can lead towards economical and sustainable construction. These can be extensively used in all building constructional activities similar to that of common burnt clay bricks. In modern era, geopolymer fly ash based bricks are abundantly utilized in numerous constructional projects instead of normal clay bricks from last few years. And also in this project various laboratory experiments were carried out on fly ash bricks samples.
Two types of fly ash cement bricks are used in the study which differs on the basis of their composition and the source of fly ash used. Fly ash concrete block are lighter in weight because of partial replacement of fine aggregate and fully replacement coarse aggregate. Fly ash is an industrial waste of thermal power station using pulverized coal. Comparative analysis on aac, clc and flyash concrete blocks 1ashish kurweti, 2ruchi chandrakar. Owing to the high concentration of calcium oxide in class c fly ash, the brick is described as. This book draws together a large quantity of research that has been carried out on pulverised fuel ash pfa over the past 30 years.
Difference between red bricks and fly ash bricks youtube. They are used as replacement for normal clay bricks and has better properties than it. Brick production using fly ash fa was investigated. Thermal properties of fly ash bricks lingbawan the unsw.
Three types of fly ash bricks in the different percentage of cement such as 3%, 5% and without cement are designed and then various tests such as compressive strength test, water. Tech structural engineering 3associate professor 1,2,3department of civil engineering 1,2,3madan mohan malviya university of technology, gorakhpur, uttar pradesh, india abstract in these days the use of concrete paver block in. Advantages and disadvantage of fly ash bricks online. The optimum ratio of fly ash and billet scale, quarry dust and billet scale is found to be 1.
The fly ash brick in more stronger and long life than other. Fly ash consists primarily of oxides of silicon, aluminum iron and calcium. Fly ash bricks are now widely used in construction of buildings, pavements, boundary wall etc. The process for making these types of blocks eliminates the requirement of.
Guidelines for manufacturing quality fly ash bricks prepared by fly ash resource centre, state pollution control board. Effect on the physicochemical properties of fly ash sand. Evaluation of the physical and chemical properties of fly ash. Request pdf on aug 1, 2011, deepankar ashish and others published properties of fly ash bricks find, read and cite all the research you. This makes fly ash suitable as a prime material in blended cement, mosaic tiles, and hollow blocks, among other building materials. Other important characteristics of the fly ash bricks have been evaluated. Also fly ash bricks in quality is much better clay brick. Density and thermal conductivity are often positively correlated. Effect on the physicochemical properties of fly ash. Fly ash bricks vs clay bricks which is best for house. Many countries have their own national standards and specifications regulating the use of fly ash in concrete. Low density and lowheat conductivity of fly ashclay bricks appears to be their main selling point.
Again, it has been observed that fly ash bricks have several superior properties compared to burnt clay bricks like better surface finish, more compressive strength, less weight, less mortar consumption for laying etc. Pdf fly ash is used for the manufacture of masonry units such as fly ash bricks and concrete blocks. Fly ash is a pozzolan, a substance containing aluminous and siliceous material that forms cement in the presence of water. Evolution of properties of fly ashlime bricks with soil. Abstractthe aim of this study is to evaluate the chemical and physical properties of clay and rha as firedclay brick materials. Fly ash bricks competitive in comparison to the conventional clay bricks and provide enormous indirect benefits. Fly ash generally contains about 5% to 6% unburnt carbon. Chemical properties of fly ash the properties of fly ash bricks depend mainly on two factors. To study the structural properties of clay and fly ash. Engineering properties, fly ash bricks, compressive strength, volumetric shrinkage, density. Ashikuzzaman, tarif uddin ahmed, zahidul alam and md. The xray powder diffraction xrd method was used to determine the fly ash chemical.
A passive solar house was designed and constructed using fly ash bricks. Four materials with different type rice husk ash, i. Fly ash addition in clayey materials to improve the quality of solid bricks giuseppe cultrone, eduardo sebastian department of mineralogy and petrology, faculty of science, granada university, avda. Study of engineering properties of fly ash bricks for.
Additives such as sand, lime and sodium silicate of various proportions were used in the mixes. Properties and use of coal fly ash ice virtual library. In fly ash based blocks although the initial strength development in the. Fuel ash and fly ash are produced as waste from burining coal or waste materials and have many uses within the construction industry such as in concrete land reclamation, treating oil and sewage wastes, bricks and blocks and grouting voids in the ground. Properties of fly ash products for use in portland cement concrete xiuping feng, boyd clark. Since fly ash is being accumulated as waste material in large quantity near thermal power plants and. This produces a strong product with good insulation properties and environmental benefits.
Compressive strength of fly ash brick with addition of lime. Leading manufacturers use an industrial standard known as pulverized fuel ash for limepozzolana mixture using over 75% postindustrial recycled waste, and a compression process. Tests were carried out to determine the strength characteristics and water absorption properties of the bricks. Fly ash brick fab is a building material, specifically masonry units, containing class c or class f fly ash and water.
In this paper, efforts has been made to study the behavior of fly ash bricks by taking different proportions of fly ash, cement, lime, gypsum and sand. When mixed with lime and water, fly ash forms a compound similar to portland cement. Uses, benefits, and drawbacks of fly ash in construction. Fly ash bricks are lightweight material compared to clay bricks, so it is suitable for multistorey building, less weight means less stress on the building, safety assured. Fly ash bricks vs clay bricks which is best bricks for home construction as we decide to build a new home, there are many question and queries comes in mind. Fly ash bricks are lighter in weight and less costly than clay bricks. It has been observed that lesser the fly ash content and higher compressive strength i. Effect of brick forming load on mechanical properties of flyash. The main objective is to illustrate the silent feature regarding fly ash chemical property.
In this paper, we have studied the composition of highstrength fly ash lime bricks using a fine pulverized fuel ash classf. The utilization of fly ash bricks results in conservation of natural resources as well as protection of environment. The physical and chemical properties of fortynine different fly ash products from. Evaluate properties of fly ash based geopolymer bricks. Pdf comparative study on fly ash bricks and normal clay. This paper reports the effects of fly ash on properties of clay bricks that can improve the thermal performance of buildings. In bricks 60, 70 and 80% fly ash are used with 0,3,5,8 and 10% of soil and remaining percent of lime. Fly ash lime bricks are chemically bonded bricks manufactured by utilizing 80 82% of fly ash, which is a major waste byeproduct of pulverised coal fired in thermal power stations, 910% of lime, 910% of sand and 0. But fly ash based building blocks enjoy certain advantages. Since 60% of countrys electricity comes from coal based power station, the country has a huge stock of fly ash amounting to 60 million tones annually. Compressed at 28 mpa 272 atm and cured for 24 hours in a 66 c steam bath, then toughened with an air entrainment agent, the bricks last for more than 100 freezethaw cycles. In this paper, we have studied the composition of highstrength fly ashlime bricks using a fine pulverized fuel ash classf.
In india, fly ash bricks are used for construction. Presented by dylan kennedy, clayton murray, and eric sandberg. Properties of bricks made using fly ash, quarry dust and. The compacted fly ash bricks also pass astm c62 requirements for clay bricks used for buildings in severe weather. Fly ash closely resembles volcanic ashes used in production of the earliest known hydraulic cements about 2,300 years ago. Its a proven fact that fly ash bricks which is made with the bis standards are 100 % reliable and longlasting than normal red clay bricks of any other conventional. The tests were part of the nsf phase 2 project on fly ash bricks 20, under t ask 6 test possible environmental concerns. Prior to exhausting the flue gas, fly ash is removed by particulate emission control devices, such as electrostatic precipitators or filter fabric baghouses see figure 11. To have better utilization of this fly ash as per nations policy on fly ash, trial have been made for making of bricks using fly ash, lime, gypsum and sand or quarry dust.
Compressive strength of fly ash brick with addition of. Fly ash bricks and comparison with clay bricks composition. The proposed unite will be using both type of fly ash depends upon the availbality 4. Properties of fly ash bricks request pdf researchgate. Pdf comparative study on fly ash bricks and normal clay bricks. Determining the thermal properties of fly ash concrete. A pozzolan is a siliceousaluminous material that, when mixed with lime and water, forms a cementitious compound. Fired bricks from fly ash manufacturing commercial brick with flu ash from illinois coals the overall goal of the brick manufacturing project at the illinois state geological survey isgs and university of illinois uiuc is to develop processes for making fired bricks commercially using illinois coal fly ash as one of the raw materials. Optimum percentage of fly ash using various combinations of material in the brick like lime, cement and clay are studied and their effect on different properties of bricks have been discussed. Introduction fly ash bricks are made of fly ash, lime, gypsum cement and sand. Fly ash addition in clayey materials to improve the quality. Type f fly ash is produced from the combustion of bituminous or an anthracite coal contains cao below 10 percent and possesses pozzolanic properties.
Jul 25, 2017 fly ash bricks are lighter in weight and less costly than clay bricks. The specific gravity of fly ash is ranging between 2. These included water absorption capacity, compressive strength and efflorescence test. The values of these characteristics for fly ash bricks are excellent and have exceeded those pertaining to clay bricks. To study the structural properties of clay and fly ash brick. Comparative analysis on aac, clc and flyash concrete blocks.
136 531 481 1083 581 1317 1512 930 1371 875 1519 710 401 97 853 686 262 345 737 1388 21 587 775 1223 213 1368 697 793 787 318 432 343 285 44 128 236 109 93 467 868 1478 984 754 1128 165