Pdf replacement of cement in concrete with rice husk ash. In the investigation described in this study rice husk ash rha has been used to partially replace cement in both concrete and sandcrete block manufacture. Malleswara rao 2 1 department, civil engineering, gitam university, 2 department of civil engineering, andhra university, visakhapatanam, a. Rice husk ash rha used as partial replacement for ordinary portland cement opc in concrete. These are prominent in countries where the rice production is abundant. It was frequently reported that compressive strength of rha based blocks increases with. This paper reports an investigation at the university of malaya to produce high strength rice husk ash concrete hsrhac of 80 mpa at 28 days. The rice husk ash has been taken for this present study due to its easy availability and effective pozzolonic properties that are expected to improve the mechanical strength properties of concrete. The compressive and flexural strengths of self compacting concrete scc produced by the.
Contribution of rice husk ash to the properties of mortar and concrete. Unprocessed rice husk ash as a partial replacement of cement. This is because rice husk ash contains 85% to 95% weight percent of amorphous silica. Effect of rice husk and rice husk ash to properties of bricks core. Characteristics of rice husk ash concrete workability. This paper evaluates how different contents of rice husk ash added to concrete may influence its properties. Effect of rice husk ash and saw dust ash blend on the. Alternative stabilizer for mud concrete intechopen.
Rice husk ash as a pozzolanic reactive material can be used to improve surface area of transition zone between the microscopic structure of cement paste and. Rice husk ash rha is obtained by the combustion of rice husk and has been found to be super pozzolanic. Rice husk ash and pumice in lightweight concrete of. Three types of lightweight concrete presenting equivalent workability were produced table 2, control concrete ctl with 100% of portland cement cem i, class 42. In 8 was carried out a research work on the use of rice husk ash in concrete. Properties of the material used must be better understood first. The variables of study include rha content, method of incorporating rha into the concrete mix, superplasticizer dosage to maintain workability of 100150 mm slump, water binder ratio and types of curing. The results of the mechanical properties of the rice husk ash at 28 days have shown.
Effect of rice husk ash on cement mortar and concrete. Studies on the effect of rice husk ash as cement admixture. Study on strength characteristics of high strength rice husk ash. Properties of blended cements made from rice husk ash. Husk ash as partial replacement for ordinary portland cement in concrete. New building materials are used to accelerate the construction work, in which the mixture plays an. Ash obtained from waste materials, rice husk ash and broiler bed ash, was considered as partial replacement for portland cement. Water requirement decreases as the fineness of rha increases. Study on properties of rice husk ash and its use as cement. Use of rice husk ash in sandcrete blocks for masonry units. In riceproducing countries rice husk asha material naturally high in silicacan be used as a.
Also it is an attempt made to develop the concrete using rice husk ash as a source material for partial replacement of cement, which satisfies the various structural properties of concrete like. The rice husk ash has good reactivity when used as a partial substitute for cement. Studies on the effect of rice husk ash as cement admixture m. Effect of rice husk ash on fresh and hardened properties. It also includes any possible barriers to the wide. Efficiency of rice husk ash as cementitious material in. The compressive strength of some commercial sandcrete blocks in minna, nigeria was investigated. In this study, cement was replaced by waste rha as 5%,10% and 15% by weight for m25 mix. The rice husk ash is a green supplementary material that has applications in small to large scale. This combination material sinter with brick kiln for rigidity and. The high volume fly ash self consolidating concrete having 28day compressive strength level of 28. As the rice husk ash is piling up every day, there is a pressure on rice industries to find a solution for its disposal.
Aggregates of well graded type and free from impurities were checked and certain standards were compiled in the course of this study. Coarse aggregate of 20 mm graded nominal size, river sand zone iii type and 53 grades pozzolana portland cement ppc were. Rice husk ash, pozzolan, compressive strength, permeability, durability 1. Rice husk ash rha is an agricultural waste product, and how to dispose of it is a problem to waste mangers. By adding 2 % of rice husk ash by weight is the best of bricks properties which 6.
Rice husk ash percentage was gradual increased from 7. Thank you for asking rice husk ash is used in concrete construction as an alternative of cement. Rice husk ash rha is an agricultural waste which is a pozzolanic material that can be. In this paper, the detailed experimental investigation was done to study the effect of partial replacement of cement by fly ash fa and. The higher the percentage of rha contents, the lower the compressive. The compressive strengths developed by the scc mixes with rha were comparable to the control concrete. Ahmad2 1department of civil engineering, southern university bangladesh, chittagong, bangladesh 2department of civil engineering, chittagong university of engineering and technology, chittagong, bangladesh corresponding author. Cost analysis showed that the cost of ingredients k. The ash was then allowed to be cool and collected and made to pass through 150 micron sieve. The use of rice husk ash in low cost sandcrete block production e. This research uses saw dust ash sda and rice husk ash rha to partially replace opc in the production of sandcrete blocks. Rha can be used in concrete to improve its strength and other durability factors. Fly ash, slag, silicam fume and rice husk ash in concrete. Rice husk ash rha was prepared using charcoal from burning.
The compressive and flexural strength of self compacting concrete using rice husk ash and limestone m. The performance of rice husk ash in concrete is of factors influencing the amount of silica added. The main applications of rice husk ash in the construction are. Introduction in this century, the utilization of rice husk ash rha as cement replacement is a new trend in concrete technology. This result, therefore, indicated that rha can be used as cement substitute.
This is justified by the reason higher water absorbing demand and larger surface area. The variation of setting time with the variation of rice husk ash amount in concrete. Research paper effect of rice husk ash on properties. Comparison of two processes for treating rice husk ash for use in high performance concrete. Use of rice huskbark ash in producing selfcompacting. 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. So, the use and practical application of rice husk ash for concrete manufacturing are important. 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. The types, properties, advantages and uses of rice husk in construction is discussed. Investigation of rice husk ash rha as a supplement in cement. Effect of nigerian rice husk ash on some engineering. Rice husk ash rha the rice husk used was obtained from ile. 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.
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. The chemical analysis of the rice husk ash revealed high amount of silica 68. 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. Effect of rice husk ash on hightemperature mechanical. Concrete blocks containing rice husk ash should be promoted as a new construction material to replace the existing blocks in market. 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. The three types of rha were added into concrete at a 20% replacement level. Special attention is paid to its efficiency for increasing the strength by partial cement. Combine effect of rice husk ash and fly ash on concrete by. Rice husk has also been used as a fuel in cement manufacturing to substitute for fossil fuels.
Lowtech methods of grinding the ash were also investigated and were found to drastically increase the compressive strength of rhacement mortars in comparison to mortars made with unground rha. Compressive strength, porosity, chloride penetration, and corrosion of scc were determined. Sandcrete blocks have been in use in many nations of the world including nigeria for a long time, playing a major role in the building and construction industry. Rice husk ash rha, pozzolanic constituents, cement masonry blocks, compressive strength. Rice husk ash as a partial replacement of cement in high. Effect of rice husk ash on workability and strength of. Rice husk ash as a partial replacement of cement in high strength concrete. Experimental studies on concrete with rice husk ash as a. Unprocessed rice husk ash as a partial replacement of. The use of rice husk ash in low cost sandcrete block. 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.
Strength development of concrete with ricehusk ash. Characteristics of masonry blocks manufactured with rice husk ash. The strength and durability properties of concrete with or without three types of rice husk ash rha, namely, amorphous, partial crystalline, and crystalline rha, were investigates. Study on properties of rice husk ash and its use as cement replacement material. A natural stabilizer such as tree resins, latex rubber stabilizer, waste ash, rice husk ash and many other ashes can be developed to chemically stabilize the earth. It is also used as the admixture to make the concrete resistant against chemical penetration.
The use of alternative cementing materials that are cheaper than ordinary portland cement opc is a welcome development. Pdf study on properties of rice husk ash and its use as. The use of rice husk ash as a pozzolanic admixture in concrete. Rice husk ash and pumice in lightweight concrete of engineering materials to improve mechanical strength portland cement composites moh azhar1,a, azwar manaf2,b, bambang soegijono3,c 1faculty of maths and science, university of indonesia, depok 16424. A series of unconfined compression tests on cementrhastabilized clay are conducted to investigate the influence of rha on the mixture properties. Rice husk and fly ash concrete blocks sciencedirect. The compressive and flexural strength of self compacting. Rice husk ash is a good superpozzolan which can be used to make special concrete mixes. It invoved the determination of workability and compressive strength of the concrete at different level of replacement. Murray and price 2008 reported that the use of biomass including rice husk as a substitute fuel for fossil fuel in cement kilns had been widely used in countries like india, malaysia and thailand. Selfcompacting concrete, rice husk ash, fly ash, rheological properties. Reducing cement content in masonry with rice husk ash, a. Compressive strength evolution of high strength concrete with. Nwachukwu department of materials and metallurgical engineering, federal university of technology owerri abstract.
Air quality index, ambient air quality, air monitoring. Ct was partially replaced with ground rice huskbark ash grhba at the dosage levels of 0%40% by weight of binder. Material properties of high strength concrete containing. This paper presents the use of blend of portland cement with rice huskbark ash in producing selfcompacting concrete scc. Effective utilization of rice husk ash by partial replacement of cement g m institute of technology, davanagere 577006 page 2 concrete. Concrete technology rice husk ash as partial replacement. Different mix proportions of sand, cement and rice husk ash rha were studied for use in sandcrete blocks. Abdullahi 60 in 6 was worked on rice husk as a stabilizing agent in clay bricks. A 20% replacement of unprocessed cambodian rice husk ash was deemed appropriate for use in smallscale, rural structural applications. Pdf properties of concrete block containing rice husk ash.
Department of civil engineering, federal university of technology, p. Compressive strengths of various mix proportions at 7, 28 and 60 days were also determined. It is most essential to develop ecofriendly concrete from rha. The rice paddy milling industries give the byproduct rice husk. The use of coconut fibre ash as a partial replacement for.