Rice Husk Ash

----------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - The objective of our project is to study the effect between rice husk and rice husk ash to the properties of unburnt brick. Manufactured the brick with the different proportions of rice husk (2%, 5%, 10%, 15%, 20% by weight), rice husk ash (2%, 5%, 10%, 15%, 20% by weight) and the combination of rice husk and rice husk ash (1-1%, 1-2%, 5-5%, 5- 10%). The result shows that rice husk and rice husk ash increases the compressive strength. By adding 10% rice husk, 10% rice husk ash, 1-1% combination shows the maximum compressive strength. Rice husk and rice husk ash can be used as construction materials so as to reduce the cost of materials, for the manufacture of bricks. The aim of our project is to study the compressive strength variations with different proportions of rice husk, rice husk ash and its combination.

This paper summarizes the research work on the properties of Rice Husk Ash (RHA) when used as partial replacement for Ordinary Portland Cement (OPC) in concrete.OPC was replaced with RHA by weight at 5%, 10% and 15%. 0% replacement served as the control. Compressive Strength test was carried out on hardened 150mm concrete cubes after at 1,3,7,28,45 & 56 days curing in water. The results revealed that the Compacting factor decreased as the percentage replacement of OPC with RHA increased. The compressive strength of the hardened concrete also decreased with increasing OPC replacement with RHA. It is recommended that further studies be carried out together more facts about the suitability of partial replacement of OPC with RHA in concrete.

DOI: http://dx.doi.org/10.21172/1.103.27 e-ISSN:2278-621X Abstract: Due to the discharge of large amounts of heavy metal-contaminated wastewater, industries bearing heavy metals are the most hazardous. Heavy metal removal can be achieved by conventional treatment processes but they have significant disadvantages, Adsorption has become one of the alternative treatments, in recent years; the search for low-cost adsorbents that have metal-binding capacities has intensified. One of which is the rice husk, a product of the rice industry. Rice husk ash from raw rice husk and chemically treated rice husk is used in the study for removal of heavy metals from industrial effluent.

Under graduate student, civil engineering department, Panimalar Engineering College, Poonamalle, Chennai-123 ABSTRACT: Soil is a complex material. Recycled and waste materials like fly ash, bagasse ash, rice husk ash can be used to soil stabilization to improve physical and chemical properties of soil. In addition to that properties which can improved by soil stabilization are CBR, shear strength of soil, UCS and bearing capacity etc. The objective of this study to check the amount of fly ash at which sample of soil and fly ash gives optimum values of CBR and UCS and after that rice husk ash is added in different proportions in the sample of soil and optimum quantity of fly ash to achieve the optimum value of CBR.

ABSTRACT: Soil is a complex material. Recycled and waste materials like fly ash, bagasse ash, rise husk ash can be used to soil stabilization to improve physical and chemical properties of soil. In addition to that properties which can improved by soil stabilization are CBR, shear strength of soil, UCS and bearing capacity etc. The objective of this study to check the amount of fly ash at which sample of soil and fly ash gives optimum values of CBR and UCS and after that rice husk ash is added in different proportions in the sample of soil and optimum quantity of fly ash to achieve the optimum value of CBR.

temperature of 900°C to get the activated carbon. The filtered solution that containing the activating agent is titrated with acid to precipitate silica powder. The temperature at which the rice husk is carbonized is very very important since the surface area characteristic of the ash depends upon the temperature of formation of ash. The ash which is obtained as follows rice husk is cleaned up from dirt by sieving it with 20 mesh sieve. The rice husk ash obtained by this produces a lot of smoke if it is kept directly in the furnace. So in order to avoid this scenario, the husk is first charred or combust to black mass on a Bunsen burner. This mass is then heated and oxidized in an electric or normal furnace at controlled temperature to obtain the required ash. The ash now obtained is finely ground and sieved through a 150 mesh sieve. The fraction ha is passing through this sieve is then used for experimental procedure. The charred husk fraction is then further carbonized at 700°C for about 3 hours.

Abstract: This research project focuses on utilization of rice husk ash for the production of porcelain. Due to the fast polluting environment there is an increasing demand for durable construction materials. Rice (Oryzasativa) is a great example of alternate material. Rice husk is a byproduct of rice milling industry. It constitutes about 50% cellulose, 25? 30% lignin, and 15? 20% of silica. This rice husk can be used as great source of fuel. When it is burnt under specific set of temperature and conditions lignin and cellulose are removed and only rice husk ash which is also known as RHA is obtained. This obtained RHA contains approximate 95% of silica. This silica can be used for the production of porcelain. Production of porcelain through RHA is not only eco friendly but it also increases the strength and durability as compared to ordinary porcelain. These RHA produced porcelain proves to be more effective supplementary material as it is economical, less costlier, strong and durable. Also the bulk density of vis reduced by the use of RHA.

partial rice husk ash on the cement in order to mitigate the availability, affordability, quality and pollution issues. Solid masonry blocks size 150*150*15 of M20 grade were casted by replacement of cement to RHA by weight at 0%,5%,10%,15%,20%,25%. Cubes were made ready for testing after 7, and 28 days curing in water served as the control. Testing was included for the strength (compressive, flexure and split tensile), workability (water binding ratio and setting time), costing analysis. The test results revealed that the workability and strength are slightly better than the standard concrete by satisfying the limits initiated endorsed by standard. The reduction on cost by 3.08% relative to the initial values.

Associate Professor, Department of Civil and Environmental Engineering, Temple University, Philadelphia 19122. ABSTRACT The objective of this paper is to upgrade expansive soil as a construction material using rice husk ash (RHA) and flyash, which are waste materials. Remolded expansive clay was blended with RHA and flyash and strength tests were conducted. The potential of RHA-flyash blend as a swell reduction layer between the footing of a foundation and subgrade was studied. In order to examine the importance of the study, a cost comparison was made for the preparation of the sub-base of a highway project with and without the admixture stabilizations.

Furthermore, the effect of RHA average particle size and percentage on concrete workability, superplasticizer content and the compressive strength influence the properties of cement. Although grinding RHA would reduce its average particle size. Incorporation of RHA in concrete increased water demand and gave excellent improvement in strength. Another interesting observation from this paper is the relationship that exists among water absorption and chloride penetration. Increasing RHA fineness enhanced the strength of blended concrete compared to coarser RHA and control OPC mixtures. The rice husk ash is an agricultural waste has plenty of used. It is hope this paper statement will improve the cement industry properties and strength using rice husk ash as blended cement.

Sabat (2013), [8] had studied the effect of lime sludge (from paper manufacturing industry) on compaction, CBR, shear strength parameters, coefficient of compression, Ps and durability of an expansive soil stabilized with optimum percentage of RHA after 7days of curing. The optimum proportion soil: RHA: lime sludge was found to be 75:10:15. Ms. Aparna (2014), [9] Roy has presented a study which gives details about soil which is stabilized with different percentages of Rice Husk Ash and a small amount of cement. The results obtained show that the increase in RHA content increases the Optimum Moisture Content but decreases the Maximum Dry Density. Also, the CBR value and Unconfined Compressive Strength of soil are considerably improved with the Rice Husk Ash content.

KEYWORDS: Rice Husk Ash, Eco Friendly Concrete, Sustainable Development I. I NTRODUCTION Sustainable development of cement and concrete industry requires the utilization of industrial and agricultural waste components. At present for a variety of reasons the construction industry is not sustainable. Firstly it consumes huge quantity of virgin materials which can remain for upcoming generations. Secondly, the production of Portland cement is a major contributor to greenhouse gas emissions that are implicated in global warming and climate change. Thirdly, many concrete structures suffer from lack of durability which may waste the natural resources. So, finding the solution to substitute a particle recycled product for part of the cement seems to be desirable for sustainable development. [1-4]

Assistant Professor, Department of Civil Engg, Mother Teresa Institute of Science and Technology Abstract- The research has shown that every one ton of cement produce releases half ton of carbon dioxide, so there is an instantaneous need to manage the usage of cement. On the hand materials wastes such as Rice husk Ash (RHA) is difficult to dispose. The Rice husk Ash imparts high early strength to concrete and also condense the permeability of concrete. Therefore the use of Rice husk Ash in concrete not only reduces the ecological pollution but also enhances the properties of concrete and also reduces the cost. This project mainly deals with the replacement of cement with Rice husk Ash. The concrete mix designed by varying the proportions of Rice husk Ash for 0%, 5%, 10%, 20%, 30% the cubes are been casted and cured in normal water for ages of 3, 7 and 28, the properties like slump cone test and compaction factor test for fresh concrete and compressive strength and split tensile strength for hardened concrete are verified and results are analysed.

During the production of cement, a large amount of carbon dioxide (greenhouse gas) releases which effects the environment badly. This work is carried out by using Rice Husk Ash (RHA) in concrete as a partial replacement of Ordinary Portland Cement (OPC). RHA is a byproduct of farming scum. RHA contains a bulky amount of silicon dioxide. The pozzolanic reactivity of RHA boost to use it as a cementious material in concrete. OPC was replaced with RHA at 0%, 5%, 10% and 15%. Addition of RHA in concrete is a sustainable approach, it reduces the pollution and provides strength and reduces the cost as well. Tests were performed on fresh as well as hardened concrete after 7, 14 and 28 days of curing in water, Hydrochloric acid and in sulfuric acid. The value of compressive strength of incorporated sample is more as compared to controlled sample. Results indicates that the addition of RHA improves the properties of concrete which includes packing density. It increases the strength and durability of concrete in term of sulphate and chloride resistance.

In this research work the nearby existing materials were used it include ordinary portland cement (OPC), river sand, coarse aggregate, water, FA and RHA. The OPC 43 grade with specific gravity 3.13 was used in all composition of concrete mix conforming to IS: 4031 (1988) [11]. The nearby existing river sand with specific gravity 2.61 and Zone II was used as a fine aggregate. The 20mm maximum size of coarse aggregate was used with specific gravity 2.64 conforming to IS: 383(1970). The FA was arranged from a power plant situated at Bhilai, Chhattisgarh, India. The processed RHA was arranged from the nearby merchant, the rice husk ash was collected from boiled rice mill and it re- burned in the furnace at controlled temperature, after the burning the ash was cooled and ground it in powder form. The details of the physical and chemical properties of FA and RHA are summarized in Table 1. To examine the effects of autogenous healing of concrete the process was used in this research consists of four stages first, to create controlled crack in the specimens, second, to calculate of the revival of certain properties, such as ultrasonic pulse velocity (UPV) test and ER, third, the environmental contact needed to attain better healing results and, finally, the assessment of the revival of the same property determined in the second stage.

Abstract. Rice husk ash is a kind of volcanic ash material with high silicon. This also provides a feasibility for rice husk ash as cement-based auxiliary cementing material. China is rich in rice husk resources, and the rice husk ash is stacked. Using rice husk ash ( RHA ) instead of traditional cementitious materials can effectively solve the environmental pollution caused by the accumulation of rice husk ash. Domestic and international scholar have added rice husk ash as mineral admixture to concrete, but the utilization rate is very low. In order to increase the added value of rice husk ash, the high silicon property of rice husk ash was used to solidify soil. The application range of solidified soil is wide, the requirements for materials are not high, and the functions are different, which can realize the extensive use of rice husk ash. This paper summarizes the literature on comprehensive utilization of rice husk ash at home and abroad, systematically expounds the physicochemical properties and production process of rice husk ash, introduces the application of rice husk ash in solidified soil, and points out the unsolved problems in this field, which provides a direction for the further development.

ABSTRACT Rice husk ash (RHA) has long been known to possess high silica content. The abundance of rice husk as agricultural waste makes it the most promising to be used as a supplementary cementations and ceramic material. In this study RHA was used as an additive material on porcelain body. The rice husk was subjected to the chemical pre- treatment with 2M HCL, 25 0 C before calcinations to increase silica content of the husk ash. The pressed pellets were sintered at the temperature of 1200 0 C and soaked for 2 hours. It was found that progressive addition of RHA in a porcelain body resulted in early vitrification of the mixture. The compressive strength was the highest at 40wt% addition of RHA. Porosity was the least at 40wt%. It can therefore be concluded that 40wt% addition of RHA into the porcelain body is the best composition.

3.0 Methodology: The soil sample and the perspective stabilizing sample is collected and sieved through 0.075mm aperture before use. Then its oxide composition is found out. And then, preliminary test are done on the soil sample and the stabilizing material to analyze the similarities in the geotechnical properties. The laboratory tests done to determine the properties include Particle size distribute on, Consistency Limits (Atterberg Limits), Insitu soil tests etc. The Standard Compaction test was done to find the optimum moisture content needed for the CBR test specimens. In the second phase of work, the Rice Husk ash is added to the soil from2.5% to 10% at an interval rate of 2.5% and lime is added at constant percentage rate of 2%. By this partial replacement being done in the soil, California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) of the natural soil and soil mixed with RHA and soil mixed with RHA + lime is comparatively studied by this experimental work and result is analyzed for effective strength increment and reduction in construction cost and to provide green environment.

Received December 13, 2009; revised January 16, 2010; accepted February 10, 2010 Abstract Experimentations have been carried out to characterize the adsorption of Methylene Blue (MB) and Congo Red (CR) dyes in the aqueous phase onto Rice Husk Ash (RHA). Theoretically analyses are also made for describing the sorption and diffusion processes. The effective pore diffusivities of the dye molecules studied in RHA are determined by a suitable global optimization technique. The depth of penetration, on the other hand, has been estimated for various initial concentrations of dyes. Theoretically predicted concentration pro- files are compared with the experimental values at different initial concentrations of these dyes. Such com- parative studies indicate that the predicted values are in excellent agreement with the experimental values.

Short Communication Res Dev Material Sci http://www.crimsonpublishers.com Abstract Durability of concrete is defined as its ability to resist deterioration after exposure to the environment of its use. This work examined the performance of Rice Husk Ash (RHA) concrete in sodium sulfate (Na 2 SO 4 ), magnesium sulfate (MgSO 4 ) and combined Na 2 SO 4 and MgSO 4 solutions. Concrete bar specimens and cubes were prepared for elongation and strength deterioration tests respectively using RHA replacement at the 7.5% replacement by volume, which had achieved the highest compressive strength from a previous study, as well as at the 30% replacement by volume, which was the highest replacement for the study. Strength deterioration tests were performed on the 7.5% replacement by the weight of cement. From the elongation findings, it was concluded that at the 7.5% replacement, RHA could be used with an advantage over 100% cement concrete in MgSO 4 environments, whereas at the 30% replacement, RHA could be used with an advantage over 100% cement concrete in both the Na 2 SO 4 and mixed sulfate environments.