An Experimental study on Self curing concrete by partial replacement of cement with flyash and ricehusk ash and sand with copper slag
Shaik Hydrali,  P Sowjanya
As important as water for life, the same way concrete for engineering structures. The ingredients of concrete are binding material (Cement), aggregates (Sand & HBG metal) and water. Present era; the cement and sand are now became a non-renewable materials because of lack of limestone deposits and sand in rivers or streams. Even though, while the production of cement (OPC) a lot of CO2 emission causes to global warming and air pollution. Although, the necessity of concrete increasing year by year. In-spite of alarming water scarcity, concrete production needs considerable amount of water, since water is needed for 28 days curing of concrete members. Reduction in water content (like arid areas, negligence in watering, presence of salts, etc.) leads to loss in strength and deterioration of concrete structures. The main scope of this project is to reduce the cement and sand content replacing with fly ash(FA) and Rice husk ash (RHA) to cement, and Copper slag (CS) to sand for M25 grade of cement concrete and instead of traditional curing method, a new method of curing is adopted i.e. Self-Curing by using Polyethylene glycol 400 (PEG-400). The adopted methodology is the cement is replaced by FA & RHA in equal proportion i.e. 5, 7.5, 10, 12.5 & 15% by weight of cement and sand is replaced by CS as 20, 40, 60, 80 & 100%. The PEG-400 is added to the concrete by 1.0% by weight of binding material. The casted cubes, cylinders and beams are tested for Compressive strength, Split tensile strength and Flexural strength respectively. From the laboratory results, the Trial-4 (20% binding material & 60% FA) showed the optimum values for the above mentioned tests.
Keywords- Self-curing concrete, Fly ash, Ricehusk ash, Copper slag and PEG-400
Cite this Article
Shaik Hydrali,  P Sowjanya,   "An Experimental study on Self curing concrete by partial replacement of cement with flyash and ricehusk ash and sand with copper slag"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.7, Issue 3, pp.329-335, July 2019, Available at :http://www.ijedr.org/papers/IJEDR1903056.pdf