An experimental investigation on properties of high strength self compacting concrete mixes

Abstract

Concrete is widely used material in various construction works, due to its excellent performance by means of durability low cost easily mould into any shape and size etc to fulfill the increasing requirements in the construction industries Self -Compacting Concrete SCC has the property to place and compact under its own self weight without any vibration and segregation SCC gives better compactioneffectively covers reinforcement reduces the cost on machinery and formwork by this it is extensively minimizing the noise pollution The method of preparing high strength concrete is a flourishing technology in construction industry especially in precast construction In India, industries discharge large quantities of waste materials during the production of various productsThe safe disposal of these waste materials from industry needs more land area and simultaneously it is affecting the environment Such type of waste materials from the industries can be effectively used in making concrete. In the earlier research industrial waste materials as by products are utilized to form mineral admixtures in replacement of the cement in various applications of concrete structures In present days there is a greatest shortage for getting natural river sand to meet out the construction needs It has made a novel attempt to replace the fine aggregate by using mineral admixtures The literature evidences that the SCC is made by adding various mineral admixtures as a substitute for cement and also maintain low water cement ratio for getting early strength The current study has made an attempt in High Strength Self Compacting Concrete HSSCC to obtain the optimum mix proportion of various mineral admixtures that can be used as a replacement for fine aggregate This research work is covered from material properties and influence of mineral admixtures in fresh and hardened concrete properties and mechanical properties of HSSCC The durability performance was also vi observed to find the feasibility of HSSCC The investigation was carried out to study the properties of HSSCC prepared with different mineral admixtures including fly ash silica fume and Ground Granulated Blast Furnace Slag GGBSwith water cement ratios of 0point3 0point35 and 0point4 The M60 grade high strength concrete was prepared in four steps of replacement with 5 10 15 and 20percentage of GGBS and silica fume and five steps of replacement by fly ash 5 10 15 20 and 25 a percentage s partial replacement of fine aggregate The fresh properties were determined by conducting various tests like slump flow Vfunnel Lbox and Ubox test Scanning Electron Microscopy SEM and Energy Dispersive Xray Diffraction Study EDSwere used to find the elemental analysis and chemical composition of the ingredients used in making HSSCC newline