Studies on the effect of rice husk ash as cement admixture. This makes fly ash suitable as a prime material in blended cement, mosaic tiles, and hollow blocks, among other building materials. Unprocessed rice husk ash as a partial replacement of cement. May 09, 2015 the technical and economic advantages of incorporating rice husk ash in concrete should be exploited by the construction and rice industries, more so for the rice growing nations of asia. Studies on the effect of rice husk ash as cement admixture 1m. The main objective is therefore to encourage the use of these aseeminglya waste. Studies on the effect of rice husk ash as cement admixture m. Eightkilogram soil bricks with fourkilogram half brick as increments were loaded in. In riceproducing countries rice husk asha material naturally high in.
Effect of rice husk ash on hightemperature mechanical. Effect of rice husk ash on workability and strength of concrete. A study on the engineering properties of sandcrete blocks. Single block size 225 x 225 x 450 mm, is produced with a vibrating machine. The chemical analysis of the rice husk ash revealed high amount of silica 68. Air quality index, ambient air quality, air monitoring. Concrete is a widely used construction material for various types of structures due to its structural stability and strength. Rha based sand cement block can significantly reduce room temperature. Ash obtained from waste materials, rice husk ash and broiler bed ash, was considered as partial replacement for portland cement. Mixes with 20% and 40% cement replacement with rha the latter contained a wr were selected for further testing. Efficiency of rice husk ash as cementitious material in high.
Properties of the material used must be better understood first. Compared to condensed silica fume csf concrete at similar wcm and workability, the strength of rha concrete is about 6% lower. The water was clean and free from any visible impurities. New building materials are used to accelerate the construction work, in which the. This is a suitable biomass source for energy production. Reducing cement content in masonry with rice husk ash, a. Uses, benefits, and drawbacks of fly ash in construction. Thank you for asking rice husk ash is used in concrete construction as an alternative of cement. Water requirement decreases as the fineness of rha increases. The rice husk ash possesses a chemical composition similar to many of the organic fibers. Semaan, nelson, mix design of rice husk ash concrete.
This superpozzolan can be used in a big way to make special concrete mixes. Concrete technology rice husk ash as partial replacement for cement manaswini m m. Effective utilization of rice husk ash by partial replacement of cement g m institute of technology, davanagere 577006 page 2 concrete. Rice husk ash is environmental polluting material and is the best supplementary material for cement replacement. Objective of this work is to study the effects of rice husk ash as an admixture on workability, strength, durability of cement concrete and cement mortar. Efficiency of rice husk ash as cementitious material in. Burning the rice husk ash is a highly siliceous material that can be used as an admixture in concrete if the rice husk is burnt in a specific manner. The compressive strength of the concrete with partial replacement of rice husk ash increases with increase in the percentage of rice husk.
Malleswara rao 2 1 department, civil engineering, gitam university, 2 department of civil engineering, andhra university, visakhapatanam, a. 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. 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. Effect of partial replacement of cement by rice husk ash in. Development of high strength concrete using rice husk ash and slag written by sravan kumar guruvu, lakshmi kumar.
So, the use and practical application of rice husk ash for concrete manufacturing are important. Rice husk ash as an admixture for concrete hollow blocks in extreme conditions free download as word doc. The types, properties, advantages and uses of rice husk in construction is discussed. In this condition rh will not affect the free water content of a. The increase the water demand for rice husk ash concrete is due to the amount of silica in the mixture. Malleswara rao 2 1 department, civil engineering, gitam university, 2 department of civil engineering, andhra university. Pdf rice husk and fly ash concrete blocks julio salas.
Optimum use of rice husk ash rha, obtained by open field burning method, is decided for improving workability, strength and durability of concrete. Development of high strength concrete using rice husk ash. Its use can reduce the environmental impact of the cement industry. Nsesheye susan msinjili from bam federal institute for materials research and testing in germany presents insight into her research on rice husk as a byproduct for concrete production. Rice husk ash which is an agrowaste and known to be a super pozzoland have. Cost analysis showed that the cost of ingredients k. Rice husk ash rha is an agricultural waste product, and how to dispose of it is a problem to waste mangers. The effect of grinding on the particle size and the surface area was first investigated, then the xrd analysis was conducted to verify the presence of amorphous silica in the ash. Rice husk ash, concrete, opc, compressive strength, admixture.
Rice husk ash rha was prepared using charcoal from burning. Pdf structural properties of rice husk ash concrete. Oct 29, 2014 nsesheye susan msinjili from bam federal institute for materials research and testing in germany presents insight into her research on rice husk as a byproduct for concrete production. Concrete blocks containing rice husk ash should be promoted as a new construction material to replace the existing blocks in market.
Pdf sustainable building blocks from rice husk ash deepa nair. Apr, 2010 rice is a major crop in many world regions, accounting for an estimated production of rice husk as an agricultural residue of about 650 million tones in 2007. Partial replacement of cement with quarry dust and rice. The use of rice husk ash in low cost sandcrete block.
Rice husk is an agricultural byproduct worldwide in large quantities available. Burning the rice husk ash is a highly siliceous material that can be used as an admixture in concrete if. The main objective of this paper is to study rice husk ash rha, its property and potential to be used both as partial and full replacement of cement in concrete production. By adding 2 % of rice husk ash by weight is the best of bricks properties which 6.
This study examined the feasibility of using rice husk ash as partial replacement for concrete. Characteristics of rice husk ash concrete workability. This paper presents a comparative study on use of rha as partial. Incorporation of untreated rice husk ash and water treatment sludge.
The rice paddy milling industries give the byproduct rice husk. Effect of rice husk ash on workability and strength of concrete abstract rice husk ash rha is an agricultural waste which is a pozzolanic material that can be blended with the cement for manufacturing concrete. The use of rice husk ash as a pozzolanic admixture in concrete marc smajila on. 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 this study, cement was replaced by waste rha as 5%,10% and 15% by weight for m25 mix. Rice husk ash sandcrete block as low cost building material ijera. Rice husk ash classification and chemical composition. The higher the percentage of rha contents, the lower the compressive.
A small addition of rha lesser than two to three by weight of the cement, to a given water cement ratio, is sufficient and helpful to. Hence, after the combustion, onefifth to onequarter of the rice husk will change into ash. 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. Compared to other agricultural byproducts, the burned rice husk presents a high yield of ash about 20% mainly composed of silica that will be mostly amorphous when properly incinerated. Lots of ways are being thought of for disposing them by making commercial use of this rha. Strength development of concrete with rice husk ash. The potentials of rice husk ash rha as a cement replacement material in concrete and mortar is well proven. Ratnam3 published on 20160627 download full article with reference data and citations. Experimental studies on concrete with rice husk ash as a. Pdf properties of concrete block containing rice husk ash. The compressive strengths developed by the scc mixes with rha were comparable to the control concrete. Pdf huge demand of building materials lead to excessive utilization of natural resources and adversely affect the. Results show that the addition of rha produces blocks of lower density. This paper evaluates how different contents of rice husk ash added to concrete may influence its properties.
Rice husk ash rha hollow sandcrete blocks were conducted to confirm their suitability for. The materials used for the production of the blocks were sand, rice husk ash rha, water and cement burham cement. The use of rice husk ash in low cost sandcrete block production e. Rice husk ash rha possesses high pozzolanic activities and very suitable as partial replacement of cement in concrete. Abstract this research deals with the effects of using rice husk ash rha as a partial weight of cement replacement in concrete roof tile production. Rice husk is difficult to ignite and does not burn easily with an open flame, unless air is blown through the husk. The rice husk ash possesses a chemical composition similar to many of. W amount of free water in a concrete mix wc weight of the free water. It is formed from hard materials, including silica and lignin, to protect the seed during the growing season. Department of civil engineering, federal university of technology, p.
The properly rice husk ashes are found to be active within the cement paste. Study on properties of rice husk ash and its use as cement. The rice husk, also called rice hull, is the coating on a seed or grain of rice. The use of rice husk ash in low cost sandcrete block production. 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.
This paper investigates the properties of rice husk ash rha produced by using a ferrocement furnace. Thus the scope of the project can be summarized as. Different levels of cement replacement with rha were investigated in terms of compression strength and workabiliy. Addition of rice husk ash to portland cement does not only. Rice husk ash rha is an agricultural waste which is a pozzolanic material that can be. Rice husk ash cvbt, center for vocational building.
Rice husk ash center for vocational building technology. The use of rice husk ash in lowcost sandcrete block production. Rice husk ash rha used as partial replacement for ordinary portland cement opc in concrete. Rice husk ash is one of the promising pozzolanic materials that can be blended with portland cement for the production of durable concrete and at the same time it is a value added product. Effect of rice husk ash on cement mortar and concrete.
As the production rate of rice husk ash is about 20% of the dried rice husk, the amount of rha generated yearly is about 20 million tons worldwide hwang, 185. Development of high strength concrete using rice husk ash and. Characteristics of rice husk ash concrete workability and. The technical and economic advantages of incorporating rice husk ash in concrete should be exploited by the construction and rice industries, more so for the rice growing nations of asia. Effect of rice husk ash on fresh and hardened properties of.
Effect of rice husk and rice husk ash to properties of bricks core. The high volume fly ash self consolidating concrete having 28day compressive strength level of 28. Comparative strength and cost of rice husk concrete block. Feasibility of using rice husk ash as partial replacement for concrete i. Pdf replacement of cement in concrete with rice husk ash. The compressive strength of some commercial sandcrete blocks in minna, nigeria was investigated.
Mechanical properties and durability of high strength. 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. Ahmad2 1department of civil engineering, southern university bangladesh, chittagong, bangladesh 2department of civil engineering, chittagong university of engineering and technology, chittagong, bangladesh corresponding author. Rice husk is an agricultural residue widely available in major rice producing countries. Effect of rice husk ash on fresh and hardened properties. Feasibility of using rice husk ash as partial replacement. When used in concrete mixes, fly ash improves the strength and segregation of the concrete and makes it easier to pump.
Mix proportions of rice husk ash concrete 5% replacement 77 8. Based on the above, optimum dose of rha is determined to enhance the desired properties of concrete without causing any adverse result on other properties. Most of the evaporable components of rice husk are slowly lost during burning and the primary residues are the silicates. The concrete specimens were tested for compressive. Effect of rice husk ash on workability and strength of. Feasibility of using rice husk ash as partial replacement for. Comparison of two processes for treating rice husk ash for use in high performance concrete. Pdf sustainable building blocks from rice husk ash sustainable. Commonly kiln fired clay bricks and ordinary portland cement opc concrete blocks are used as masonry units. Special attention is paid to its efficiency for increasing the strength by partial cement. When applied as biomass for energy production, this amount of rice husk would yield about million tones of ash with silica contents typically above 90%. Properties of blended cements made from rice husk ash.
The compression strength of the concrete mix increases with replacement of rice. In 8 was carried out a research work on the use of rice husk ash in concrete. Sources of rice husk ash rha will be in the rice growing regions of the world, as for example china, india, and the fareast countries. Rice husk ash as an admixture for concrete hollow blocks. 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. May 09, 2015 replacement of cement with rice husk ash by 20% 1.
Aliu3 1,2,3 civil engineering department, rufus giwa polytechnic, pmb 1019, owo, ondo state. Test results indicate that the most convenient and economical temperature required for conversion of rice husk into ash is 500c. Rha in concrete blocks apart from using high quality rice husk ash with amorphous silica in high strength concrete, rice. Rice husk ash in concrete properties, advantages and uses. The work is based on an experimental study of roof tiles produced with ordinary portland cement. Jul 05, 2017 thank you for asking rice husk ash is used in concrete construction as an alternative of cement. Concrete block materials consist of cement, filler, and rice husk. When mixed with lime and water, fly ash forms a compound similar to portland cement. Strength development of concrete with ricehusk ash. Rice husk and fly ash concrete blocks sciencedirect. Following parameters influences behavior of the rice husk ash concrete, so these parameters are kept constant for the experimental work. Isaia, concrete incorporating ricehusk ash without processing. Rice husk ash and pumice in lightweight concrete of.
Numerous studies have been conducted on rice husk ash concrete in the last century. Fly ash, slag, silicam fume and rice husk ash in concrete. Also, it has a high average calorific value of 3410 kcalkg. A series of unconfined compression tests on cementrhastabilized clay are conducted to investigate the influence of rha on the mixture properties. Effect of partial replacement of cement by rice husk ash.