Properties of blended cements made from rice husk ash. Thus, due to growing environmental concern and the need to conserve energy and resources, utilization of industrial wastes as supplementary cementing materials has become an integral part of concrete construction. Rice husk ash percentage was gradual increased from 7. Special attention is paid to its efficiency for increasing the strength by partial cement. Effect of rice husk ash on fresh and hardened properties. In the ancient period, construction work was mostly carried out with help of mudstone from industry. Rice husk ash cvbt, center for vocational building. Department of civil engineering, federal university of technology, p. Rice husk ash rha used as partial replacement for ordinary portland cement opc in concrete.
Rice hull ash brick formula with no cement natural. Pdf concrete blocks containing rice husk ash should be promoted as a new construction material to replace the existing blocks in market. Isaia, concrete incorporating ricehusk ash without. The main applications of rice husk ash in the construction are. Structural properties of rice husk ash concrete article pdf available in international journal of advances in engineering sciences and applied mathematics 32 january 20 with 5,742 reads. Rice husk ash as a partial replacement of cement in high strength concrete. By using rice husk ash in concrete, we can improve the properties of concrete. Structure and properties of mortar and concrete with rice husk ash. Comparison of two processes for treating rice husk ash for use in high performance concrete. This paper evaluates how different contents of rice husk ash added to concrete may influence its properties. The intemational journal of cement composites and lightweight concrete, volume 9, number3 august 1987 rice husk and fly ash concrete blocks julibn salas, marina alvarez and janer veras synopsis this paper forms part of a project on materials, technology and prototypes of very low cost housing, carried out at the i nstituto eduardo torroja spain.
In this study, cement was replaced by waste rha as 5%,10% and 15% by weight for m25 mix. Rice husk ash rha the rice husk used was obtained from ile ife, nigeria. The rice husk ash concrete aims to prepare light weight structural concrete which may reduce considerably the self load of structures and permits large precast units to be handled. Properties of the material used must be better understood first.
Unprocessed rice husk ash as a partial replacement of cement. Rice husk ash sandcrete block as low cost building material ijera. In many cases depending on the nature of husks and burningcooling conditions the total silica of rha exceeds 90%. Rice husk ash rha effectiveness in cement and concrete. The variation of setting time with the variation of rice husk ash amount in concrete. In 8 was carried out a research work on the use of rice husk ash in concrete. Modified nansu method has been used for design mix as the study was carried out for medium strength of concrete. It is also used as the admixture to make the concrete resistant against chemical penetration. Pdf rice husk and fly ash concrete blocks julio salas. Compared with conventional mineral admixtures such as fly ash fa and slag, rha has a huge specific surface area and high ac. Use of rice husk ash in sandcrete blocks for masonry units. Compressive strengths of concrete hollow blocks using rice.
Study on strength characteristics of high strength rice husk ash. The compressive strength of some commercial sandcrete blocks in minna, nigeria was investigated. The researchers investigated the possibility of using rice husk ash in reducing the amount of cement in making concrete hollow blocks. The resulted concrete blocks provided resistances and densities similar to the control samples and reduced water absorption significantly. Pdf structural properties of rice husk ash concrete. Malleswara rao 2 1 department, civil engineering, gitam university, 2 department of civil engineering, andhra university, visakhapatanam, a. Rice husk ash and pumice in lightweight concrete of. Pdf replacement of cement in concrete with rice husk ash. The use of rice husk ash as a partial replacement of cement has been carried out, among others 3, 4, 5 making concrete by adding rice husk ash and superplasticizer can increase the strength. Thus the use of rice husk ash in concrete in a large scale will help to lessen. Different mix proportions of sand, cement and rice husk ash rha were studied for use in sandcrete blocks.
This is justified by the reason higher water absorbing demand and larger surface area. Rice husk ash rha was prepared using charcoal from burning. Air quality index, ambient air quality, air monitoring. Rice hull ash bricks are highly insulating and often used in refractories. Rice husk ash rha is obtained by the combustion of rice husk and has been found to be super pozzolanic. Effect of rice husk ash on workability and strength of concrete avinash babu srinivasreddy 1, timothy j mccarthy 2 and eric lume 3 1masters student of civil engineering, university of wollongong 2professor of structural engineering, university of wollongong 3honorary fellow, university of wollongong abstract. Using wood fiber waste, rice husk ash, and limestone powder waste as cement replacement materials for lightweight concrete blocks. Characteristics of rice husk ash concrete workability. Concrete block materials consist of cement, filler, and rice husk.
Reducing cement content in masonry with rice husk ash, a. The rice husk ash is a green supplementary material that has applications in small to large scale. Rice husk ash in concrete properties, advantages and uses. Mechanical properties and durability of high strength. In this investigation, a feasibility study is made to use rice husk ash as an. Studies on the effect of rice husk ash as cement admixture. Products made of fly ash and rice hull ash are typically lower cost than portland cement.
The rice husk ash will result in the decrease of setting time. A series of unconfined compression tests on cementrhastabilized clay are conducted to investigate the influence of rha on the mixture properties. Durability study on compressive strength of concrete using rice husk ash as a partial replacement using magnesium sulphate solution. This type of concrete can achieve high strength of 80 nmm2 at 28 days, irrespective of method of inclusion of rice husk ash or curing conditions. One of these is rice husk ash rha which has been found suitable by. Pdf properties of concrete block containing rice husk ash. Strength development of concrete with ricehusk ash.
The potential and efficiency of using rice husk ash rha to add up or partially replace portland cement in deep cement mixing technique are examined. Visit for more related articles at journal of industrial pollution control. Rice husk and fly ash concrete blocks sciencedirect. Pdf rice husk ash rha possesses high pozzolanic activities and very suitable as partial replacement of cement in concrete. The potentials of rice husk ash rha as a cement replacement material in concrete and mortar is well proven. The paper assesses the use of rice husk ash rha as an admixture in concrete in normal environment by determining the effect of addition of rha of 0%, 5%, 10% and 15% respectively to concrete. Concrete blocks containing rice husk ash should be promoted as a new construction material to replace the existing blocks in market. Compared to condensed silica fume csf concrete at similar wcm and workability, the strength of rha concrete is about 6% lower. Effect of rice husk ash on cement mortar and concrete. Lots of ways are being thought of for disposing them by making commercial use of this rha.
Effect of rice husk ash on hightemperature mechanical. Rice husk ash rha is an agricultural waste which is a pozzolanic material that can be. Generally the rice husk ash is used while burning the raw clay bricks in the brick. The use of rice husk ash in low cost sandcrete block. Pdf sustainable building blocks from rice husk ash deepa nair. This superpozzolan can be used in a big way to make special concrete mixes. Effect of partial replacement of cement by fly ash, rice husk ash with using steel fiber in concrete r. Effect of rice husk ash on workability and strength of.
Fly ash, slag, silicam fume and rice husk ash in concrete. Pdf durability study on compressive strength of concrete. Rice husk ash hereafter rha, is the solid residue derived from burning rice husks. The use of rice husk ash in lowcost sandcrete block production.
Rice husk from local rice mills was burnt completely in open field condition and sieved with 150 micron is sieve. Comparative strength and cost of rice husk concrete block. Hamid, rice husk ashan alternativematerial in producing high strength concrete,international conference onengineering materials, june 811, 1997, ottawa, canada, pp. Air entrainment additives create tiny air spaces in concrete and geopolymer to reduce weight, increase insulation value and resist damage from freezing. Pdf using wood fiber waste, rice husk ash, and limestone. The addition of rice husk ash to a concrete mixture has been proven to increase corrosion resistance. Pdf the use of rice husk ash in low cost sandcrete block. The rice husk ash rha contain near about 85 % to 90 % amorphous silica.
Effective utilization of rice husk ash by partial replacement of cement g m institute of technology, davanagere 577006 page 3 1. The use of rice husk ash in low cost sandcrete block production e. After collection, the rice husk was burnt under guided or enclosed place to limit the amount of. Efficiency of rice husk ash as cementitious material in. It has a higher early strength than concrete without rice husk ash. Rha, the product of burning raw rice husk, has a greater content of sio 2 by more than 90 %. Water requirement decreases as the fineness of rha increases.
847 1200 1558 31 1118 1007 1385 1211 1311 1337 84 279 1465 1234 1293 216 801 408 1470 1437 1293 536 406 740 1432 1487 211 1402 843 424 1030 1367 614 354 1154 1143 1426 1156 821