Abstract
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.
Highlights
Conventional materials of construction like cement, sand and granite are highly pre-requisites in construction industry, of which concrete is the basic and widely used cementitious material in civil engineered structures
Apart from other alternatives which utilize waste, conserving natural resources and safeguarding the essence of life- environment, the rice husk ash is widely used as cement replacement in concrete because it has pozzolanic properties which enhance the strength of concrete [1]
Results of flow of concrete gets maximum at 0.60 w/c ratio which is 55% and 34% in plain and concrete with 10% Rice husk ash (RHA) respectively as compared to 0.45 w/c ratio
Summary
Conventional materials of construction like cement, sand and granite are highly pre-requisites in construction industry, of which concrete is the basic and widely used cementitious material in civil engineered structures. Are the only viable and available sources to substitute, and their apt and suitable use would ward away the eco-system deterioration altogether with preservability of sources of cement production. As this waste is available in great abundance with no commercial value and very meagre cost of transportation. Apart from other alternatives which utilize waste, conserving natural resources and safeguarding the essence of life- environment, the rice husk ash is widely used as cement replacement in concrete because it has pozzolanic properties which enhance the strength of concrete [1]. This research focuses on the use of rice husk ash (waste stuff) in concrete to replace cement partially
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