Effect of Rice Husk Ash on Compressive Strength of Concrete (original) (raw)

Effect of Rice Husk Ash and Water-Cement Ratio on Strength of Concrete

In present status quo, number of researcher are working on waste materials as potential supplement for any of the constituent of concrete to cope with sustainable development. As, the ingredients which constitute the body and give strength to concrete are natural available limited material and has to deplete one day. Thus, there is desperately need of alternate that may replace the limited natural resources. In this regard, this study focuses the rice husk ash (waste stuff) as partial replacement of cement and its possible impact on strength of concrete. In addition, this research work also this research work is conducted to investigate the effect of water-cement ratio on the strength of concrete at 10% partially replacement of Rice husk ash (RHA) by the weight of cement. RHA is a mineral admixture obtained by burning husk at certain temperature. Since as per pervious researches, the physical and chemical properties of RHA are very reactive Pozzolans and possess binding properties so can be used as cement supplement. Therefore, for laboratory experimental work, total 144 cubical and 72 cylindrical. In this research, number of concrete specimens were cast and tested at 1:2:4 mix ratio with various w/c ratios i.e. 0.45, 0.50 and 0.60. Further, at each specified water-cement ratio, two mechanical properties (compressive and splitting tensile strength) were determined in Universal Testing Machine (UTM). These physical properties of concrete were investigated at 7, 14, 28 and 56 days curing period. The experimental results show that the compressive strength gets increased up to 14.51% and tensile splitting test strength increased up to 10.71% at the w/c ratio of 0.45. The workability of plain fresh concrete at all w/c ratios is slightly greater than the workability of concrete blended with 10% RHA. Thus, RHA improves the properties of concrete when used in specific amount. As a result, it can reduce the overall cost of construction and it will reduce the adverse environmental effect.

Strength Performance of Concrete Produced with Rice Husk Ash as Partial Replacement of Cement

African Journal of Environmental Sciences & Renewable Energy, 2022

Concrete is the most common construction material with its major constituent being cement. The production of this Cement results in a lot of environmental issues which include the constant emission of CO2 gas. Reduction of this gas, preservation of natural resources needed in the production of the constituent of cement and subsequent sustainability of concrete structures have fueled the search for alternative cementing material to produce environment-friendly construction materials. Recently, supplementary cementitious materials like the agricultural by-products are used to replace a portion of the cement in concrete mixtures. The use of such CSM in concrete not only prevents these products from being land-filled which causes pollution but also enhances the properties of concrete in the fresh and hardened states. These supplementary cementitious materials with pozzolanic action react with hydration products in cement to form calcium silicate hydrate (CSH) thus enhancing and improving concrete quality and consequently reducing the cost of concrete production. One of such material is Rice Husk Ash (RHA). The study investigated the chemical composition of RHA as well as the specific gravity, workability, compressive strength, split tensile strength and flexural strength properties, with varying percentage of blended cement concrete and 100% cement concrete of mix ratio 1:2:4 and water-cement ratio of 0.5 were examined and compared. Slump test and compacting factor test was carried out to check the effect of RHA on the workability of fresh concrete. RHA partially replace cement in the order of 0%, 5%, 10%, 15%, 20%, 25% and 30% were cast. The concrete specimens were tested at the ages of 7, 14, 21 and 28 days. The optimal cement replacement was found to be at 10% RHA. This combination gave a compressive strength of 26.8 N/mm2. This is close to the control concrete with compressive strength of 26.9 N/mm2 at 28days hydration period. Therefore, rice husk ash can be used as a replacement for cement in concrete.

A Study on Compressive Strength of Cement with Rice Husk ASH

In this Research work ,the investigation was carried to find the effect of partial substitution of cement by rice husk ash (RHA) in proportion starting from 15% mix together in concrete by substitution of cement with the moderate increase of RHA 5%, last proportion was taken 15% RHA .The test on hardened concrete were destructive in nature which includes compressive test on cube for size (150*150*150) at 3,7 and 28 days of curing done as per IS 10269 2009,the work performed in this research reports the effect on the behavior of concrete produced from cement with RHA at different proportion on the mechanical properties of concrete such as compressive strength. Investigation reported that compressive strength increases by 32% were obtained at different combinations at 5% ,10% and 15% RHA partial replacement of RHA produces the environmental effects , so this replacement is ecofriendly and improves its strength.

Study on concrete with rice husk ash

Innovative Infrastructure Solutions, 2018

Rice husk ash (RHA) possesses high pozzolanic activities and very suitable as partial replacement of cement in concrete. This paper presents a comparative study on use of RHA as partial replacement of cement in concrete specimens. Review of the researches on physical, mechanical and structural properties of concrete containing RHA as partial replacement of ordinary Portland cement was included in this paper. Simultaneously, concrete specimens were tested with different percentages of RHA as replacement of cement content and with different w/c ratio. Compressive strength, flexural strength, tensile strength and slump test were carried out to evaluate the appropriateness of using RHA in concrete. The replacement of cement by RHA in structural concrete represents a good alternative in as economical as strength consideration of concrete, even without any kind of processing and found environmental benefits related to the disposal of waste. Review of researches shows that RHA-used concrete can resist chloride penetration more than normal ordinary Portland cement concrete.

Variation in % of Rice Husk Ash with Cement for Improvement in Properties of Concrete

The Rice Husk Ash can be used as an alternative material instead of ordinary Portland cement. This technology could reduce the CO2 emission to the atmosphere caused by the cement industries. In the present investigation, a feasibility study is made to use Rice Husk Ash as an admixture to replace Portland cement in Concrete, and an attempt has been made to investigate the strength parameters of concrete (Compressive and Flexural). For control concrete, IS method of mix design is adopted and considering this a basis, mix design for replacement method has been made. Five different replacement levels namely 5%, 7.5%, 10%, 12.5% and 15% are chosen for the study concern to replacement method with range of curing periods starting from 7days and 28days are considered in the present study. Therefore, this paper aims at experimental study of variation of percentage of rice husk ash with cement for improvement in properties of concrete.

Effects of Rice Husk Ash on Properties of Cement Concrete

Worldwide consumption ofconventional cement concrete is estimated to be more than 1000kg/person. Cement material presently is not in a position to cope this high demand. Hence, overstressing the reserves of traditional building materials. The wide spread need for conserving resources and environment will reflect major emphasis on the use of wastes and by-products like, saw mill waste, blast furnace slag or Rice husk etc. In the present investigation, effects on various properties like workability, initial and final setting time and compressive strengths are considered by replacing 20% of cement with RHA. The compressive strength test sales of dimension 15x15x15 cm were tested by replacing 20% of cement by weight. The results indicated that RHA can be used as a substitute for cement(around 20% replacement) after 3, 7 and 28 days of curing.

A Study and Implementation of Rice Husk Ash in Concrete

The optimized RHA, by controlled burn or grinding, has been used as a pozzolanic material in cement and concrete. Using it provides several advantages, such as improved strength and durability properties, and environmental benefits related to the disposal of waste materials and to reduced carbon dioxide emissions. Up to now, little research has been done to investigate the use of RHA as supplementary material in cement and concrete production. The main objective of this work is to study the suitability of the rice husk ash as a pozzolanic material for cement replacement in concrete. However, it is expected that the use of rice husk ash in concrete improve the strength properties of concrete. 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 structural properties of concrete like compressive strength. From the entire experimental work & studies it is concluded that mix M20 with the replacement of 20% is the best combination among all mixes, which gives the maximum compressive strength.

Mechanical Properties of Rice Husk Ash (RHA) - High strength Concrete

High strength and high performance concrete are being widely used all over the world. Most of the applications of high strength concrete have been found in high rise buildings, long span bridges etc. The potential of rice husk ash as a cement replacement material is well established .Earlier researches showed an improvement in mechanical properties of high strength concrete with finely ground RHA as a partial cement replacement material. A review of literature urges the need for optimizing the replacement level of cement with RHA for improved mechanical properties at optimum water binder ratio. This paper discusses the mechanical properties of RHA-High strength concrete at optimized conditions.

IJERT-Effect of Rice Husk Ash (RHA) as Partial Replacement of Cement on Concrete Properties

International Journal of Engineering Research and Technology (IJERT), 2014

https://www.ijert.org/effect-of-rice-husk-ash-rha-as-partial-replacement-of-cement-on-concrete-properties https://www.ijert.org/research/effect-of-rice-husk-ash-rha-as-partial-replacement-of-cement-on-concrete-properties-IJERTV1IS6098.pdf Cement is widely noted to be most expensive constituents of concrete. The entire construction industry is in search of a suitable and effective the waste product that would considerably minimize the use of cements and ultimately reduces the construction cost. Rice husk ash (RHA) which has the pozzolanic properties is a way forward. The possibility of using RHA as a construction material need to be investigates. Three grades of ordinary Portland cement (OPC) namely; 33, 43 and 53 as classified by Bureau of Indian Standard (BIS) are commonly used in construction industry. A comparative study on effects of concrete properties when OPC of varying grades was partially replaced by RHA is discussed in this paper. Percentage replacement of OPC with RHA was 0, 10, 20, 30 and 40% respectively. The compressive strength, water absorption, shrinkage and durability of concrete were mainly studied. The study suggests that up to 20% replacement of OPC with RHA has the potential to be used as partial cement replacement, having good compressive strength performance and durability.

Effect of Rice Husk Ash (RHA) on Physical Property and Mechanical Strength of Concrete

Advanced Materials Research, 2015

Fast depleting natural resources, huge consumption of energy, and environmental hazards involved in the production of cement has inspired researchers to find partial replacement of cement using other or similar materials. Rice husk ash (RHA), an agricultural waste, is classified as “a highly active pozzolan” because it contains a very high amount of amorphous silica and a large surface area. Rice husk is natural fiber that has the advantages of low density, low cost and biodegradable. In Malaysia paddy is grown locally especially in northern states of Peninsular Malaysia. Rice husk is a by-product of paddy being process into rice. These make it a natural candidate for cement replacement agent especially in Paddy producing countries. In this paper, RHA was introduced as the micro filler in concrete mixtures. The replacement of RHA which is lighter as compared to the Ordinary Portland Cement results in decreasing density of cement fiber composite and less permeable concrete.