A Study of Mechanical Properties of High Strength Concrete

Abstract

High strength concrete is widely used for construction of high rise structures like bridges and dams so on. But using high strength concrete cost us more. Alternatively we can use some admixtures which can increase strength indirectly. In this project we have used GGBS, MICROSILICA AND ALCCOFINE and CRYSO is 1% in chemical admixture. On conducting different trail mixes we have come to know that by using 0%, 5%,10%,15%,20% and 25% is tested in normal water for 3, 7, 28 days. The results showed the suitability of concrete improvement in strength in normal water. In this paper reports from few researchers have been studied on strength and durability performance of alccofine as a partial replacement of cement in concrete. The efforts made by the researchers for enhancing the performance of concrete over the last few years proved that supplementary cementitious materials with mineral and chemical admixtures can improve the strength and durability of concrete. Alccofine is one among the supplementary cementious materials. Alccofine is new pozzolanic material which is bringing technical revolution in the construction industry. From the survey it is found the alccofine can achieve high strength when is replaced by cement at 0% - 20% compared to the traditional concrete. Micro silica is an amorphous type of silica dust mostly collected in bag house filters as by-product of the silicon and ferro-silicon production. The paper summarizes important physical and chemical properties of micro silica and uses those results for an evaluation of micro silica from a Health Safety and Environment (HSE) standpoint. Micro silica consists of spherical particles with an average particle size of 150 nm and a specific surface area of typically 20 m3/g. The chemical and physical properties of this inorganic product are different as compared to other amorphous and crystalline silica poly morphs. More than 500.000 MT of micro silica are sold to the building industry world-wide and are used in fibre cement, concrete, oil-well drilling, refractories, and even in polymers.