Experimental investigation on Quartz Powder effect on Compressive Strengths of High Strength Concrete (HSC)
Subject Areas : Analysis of Structure and Earthquake
javad javadi
1
,
Masoud Pourbaba
2
1 - civil,Engineering,azad shabestar.shabestar.iran
2 - Civil Engineering Department, Maragheh Branch, Islamic Azad University
Keywords: silica fume, high performance concrete, quartz powder, super plastisizer, HSC (High strength concrete),
Abstract :
HSC has great mechanical properties and durability and is one of technology developments in concrete. This type of concrete has high cohesion, compressive strength and low water to cement ratio and permeability which results to high durability. HSC is a cemental composite product that contains optimum amount of fines and with a water to cement ratio (W/C) less than 0.25.High performance concrete compared with normal concrete has a structure with discontinous pores that results to high performance and minimum water permeation to concrete. HSC’s admixture contains water, silica fume, cement, fine sand, super plastisizer and rock powder like quartz that in this study are used of Iran’s local materials. In this study 10x10x10 cube specimens were made and evaluated. Compressive leads to failure were applied to concrete specimens. The purpose of this study is investigation of quartz powders increase in HSC.Results shows that concrete compressive strength with 11% quartz powder is the highest and increase in quartz powder lead to brittle pre failure and explossive failure of concrete specimens.Other considerations shows that increase of quartz powder leads to more crack on concrete and it is suggested to use fibers to prevent more crack in this type of concretes.
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