Stabilization of Earth Block Using Rice Husk Ash as Partial Replacement in Cement

The most outstanding problem militating the production of earth block in Nigeria, is the exorbitant prices of cement, rice ash replaced with cement, stabilized compressed earth block to carry load. The main objective of this study was to investigate the sustainability of earthen construction block with a partial replacement of cement using Rice Husk Ash (RHA). RHA is a bye-product material obtained from the combustion of rice husk which consists of non-crystalline silicon dioxide with high specific surface area and high pozzolanic reactivity using a set of sieves 3.35um - 63um, weigh balance, oven maintained at a temperature of 105°C and 110°C, six meta trays, a bucket, a soap, wire brushes, and a mechanical shaker. It is used as pozzolanic material in earth block. Testing specimen were determined and examine in structural composition by means of unconfined compressive strength hydraulically compressed for crushing the composition of mix with RHA content ranges from 10% to 50% to respectively. The result of the compressed earth block shows a significant resistance of shear strength of 30 to 90 kg/mm2, proving that stabilized earth block can satisfactorily carry load when structurally loaded and can resist tensile and compressive stresses.

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Mix Design of Grade M35 by Replacement of Cement with Rice Husk Ash in Concrete

International Journal of Engineering and Management Research ◽

10.31033/ijemr.8.3.11 ◽

2018 ◽

Vol 8 (03) ◽

Author(s):

Savita Chaudhary ◽

Aditya Pratap Singh

Keyword(s):

Rice Husk ◽

Carbon Dioxide Emissions ◽

Rice Husk Ash ◽

Strength Properties ◽

Environmental Benefits ◽

Partial Replacement ◽

Pozzolanic Material ◽

Concrete Production ◽

Cement And Concrete ◽

Strength And Durability

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

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Physical Properties of Cement Mortar Containing Waste Ash

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.804.129 ◽

2015 ◽

Vol 804 ◽

pp. 129-132

Author(s):

Sumrerng Rukzon ◽

Prinya Chindaprasirt

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Rice Husk ◽

Rice Husk Ash ◽

Cement Mortar ◽

Ash Content ◽

Water Requirement ◽

Test Results ◽

Pozzolanic Material ◽

Materials Used

This research studies the potential for using waste ash from industrial and agricultural by-products as a pozzolanic material. Classified fly ash (FA) and ground rice husk ash (RA) were the materials used. Water requirement, compressive strength and porosity of cement mortar were investigated. Test results indicated that FA and RA (waste ash) have a high potential to be used as a good pozzolanic material. The water requirement of mortar mix decreases with the increases in fly ash content. For ground rice husk ash (RA), the water requirement of mortar mix increases with the increases in rice husk ash content. In addition, the reduction in porosity was associated with the increase in compressive strength.

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Determination of Creep Behavior of Concrete Beams Made with Rice Husk Ash

The Open Civil Engineering Journal ◽

10.2174/1874149502115010339 ◽

2021 ◽

Vol 15 (1) ◽

pp. 339-346

Author(s):

Winfred Mutungi ◽

Raphael N. Mutuku ◽

Timothy Nyomboi

Keyword(s):

Prediction Model ◽

Rice Husk ◽

Creep Behavior ◽

Rice Husk Ash ◽

Concrete Beams ◽

Plain Concrete ◽

Reinforced Concrete Beams ◽

Partial Replacement ◽

Design Strength ◽

Concrete Production

Background: Creep in concrete is a long-term deformation under sustained loading. It is influenced by many factors, including constituent materials, environmental conditions, among others. Whenever there is an alteration in the convectional concrete preparation process, the creep characteristics need to be realistically assessed. In the present construction, rice husk ash has been used for partial replacement of cement in concrete production. This is because its properties of both tensile and compressive strength in concrete have been tested and found comparable with plain concrete. However, durability characteristics such as creep, which take place in the long run, have not been realistically assessed. Therefore, it is important to study the creep of rice husk ash concrete, which will further help in the development of a creep prediction model for such concrete for use by design engineers. Objectives: Rice husk ash was used as supplementary cementitious material in concrete, and the creep behavior was studied with the aim of producing a creep prediction model for this concrete. Methods: The cement was replaced with 10% of rice husk ash in concrete with a design strength of 30MPA. Reinforced concrete beams were cast and loaded for flexural creep 35 days after casting. The loading level was 25% of the beam’s strength at the time of loading. The creep observation was done for 60 days. The rice husk used was obtained locally from Mwea irrigation scheme in Kenya. The experiments were carried out in our school laboratory at Jomo Kenyatta university of Agriculture and Technology. Results: The creep strain data of rice husk ash concrete beams was obtained with the highest value of 620 micro strain for 60 days. The results were used to develop a creep prediction model for this concrete. Conclusion: A creep prediction model for rice husk ash concrete has been developed, which can be adopted by engineers for class 30 of concrete containing rice husk ash at a 10% replacement level.

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