Experimental investigation on concrete subjected to direct shear test

Abstract

A Structure may be subjected to various environmental and loading condition however, in general the properties determined under one set of condition may not be used to determine the behavior of the material under a different set of conditions.The construction and manufacturing industry nowlacking asatisfactory and practical test on materialswhich demonstrates the relative brittleness of the material and direct shear tests of several concrete mixes &alike construction materials. To perform that function, a simple and practical test has been developed. The drop weight direct shear test done by the ACI committee for concrete is often criticized for large variation within the results. This paper recognizes the route and the source of this huge variation.Accordingly suggesting the modification to the ACI test. The evaluation of the proposed modification were made. These values were compared to the current ACI test, by performingdirect shear tests on 14 specimens.Studies were carried out on different materials like GGBS (Ground Granulated Blast Furnace Slag), RHA(Rice Husk Ash) and Silica Fume, with replacement of cement and plastics were replaced for fine aggregates. Two types of steel fiber that is crimped and hooked having 30 mm length and 0.1 mm diameter.Tests were carried on m25 mix with various materials volume fracture to determine the direct shear resistance for 28 days. The test is exclusively suitable to the latest and tougher construction materials into the industries such as plastic concrete, fibrous concreteetc.Other material properties such as toughness, stands capacity and fatigue performances also can be predicted with the initial data. Result shows that average number of drops for first crack and ultimate further is observed. It is clear that GS 10/1 and RS 10/1 have higher direst shear resistance from other mixtures. This is due to the addition of steel fibers in concrete mixtures.