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

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.

Use of Marble Powder and Tile Powder as Cementitious Materials in Concrete

“…Many methods have been proposed on the use of industrial or agricultural waste as partial cement substitutes [10]. Industrial waste includes waste from marble powder, blast furnace slag, tile powder [11], fly ash and silica fume, while agricultural waste includes rice husk ash [12,13], corn cob ash [14], wheat straw ash, ground coal bottom ash [15,16], coconut waste, and bagasse ash, which are used to replace partially the cement in concrete [17,18]. The use of these wastes as substitutes for cement not only reduces the cost of concrete, but it also minimizes the negative environmental impacts associated to their disposal, and the release of CO 2 during cement production [19,20].…”

Effect of Sugarcane Bagasse Ash and Lime Stone Fines on the Mechanical Properties of Concrete

“…Many CRMs are commercially available and can be used in concrete. Some of the most common materials are sugarcane bagasse ash (SCBA) [12,13], limestone fines (LSF), rice husk ash (RHA) [14][15][16], silica fume (SF), etc. [17,18].…”

Rice Husk Ash and Fly Ash Effects on the Mechanical Properties of Concrete

“…According to [8], human activity produces more than 5,000 tons of solid waste per year, which include ingredients such as silica fumes, RHA [9,10], FA, and corncob ash. Considerable savings in cost and energy consumption could be achieved by utilizing these by-products as partial cement replacements [11].…”