2000 to assess the expansion of mortar bars made with different levels of cement replacement with rice husk ash rha revealed that a partial replacement of cement with rha of between 12 and 15 may be sufficient to control deleterious expansion due to alkali silica reaction in concrete depending.
Replacement of cement in concrete with rice husk ash.
This study attempts to make an evidence based evaluation of the sustainability and benefits of rha.
Weight of concrete blocks is considerably reduced with increase in the amount of rice husk ash.
The rice husk ashes in the concrete react with the calcium hydroxide to bring more hydration products.
This is because rice husk ash contains 85 to 95 weight percent of amorphous silica.
The rice husk ash is a green supplementary material that has applications in small to large scale.
Rice husk ash rha has been found as a potential partial replacement for cement in concrete.
Investigation conducted by hasparyk et al.
Cement replacement with rice husk ash were done in proportions of 10 20 30 40 and 50 in volume of concrete.
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 aggregate in the high performance concrete.
With this research work the problem of waste management of this agro waste.
Rice husk ash rha has been used as a highly reactive pozzolanic material to improve the microstructure of the interfacial transition zone itz between the cement paste and the aggregate in high performance concrete biu et al 2005 rice husk ash has also been reported to improve the properties of concrete or cement paste due to the pozzolanic reaction and its role as a micro filler.
The consumption of calcium hydroxide will enable lesser reactivity of chemicals from the external environment.
The main objective of this paper is to study rice husk ash rha it s property and potential to be used both as partial and full replacement of cement in concrete production.
Various strength parameters like compressive strength flexural strength and water absorption were determined.
Abstract this research work was experimentally carried out to investigate the effects of partially replacing ordinary portland cement opc with our local additive rice husk ash rha which is known to be super pozzolanic in concrete at optimum replacement percentage.
Applications of rice husk ash.