A STT]DY OF TESING MATERIALS FOR MEAST]RMENT OF CONCRETE STRENGTH

Abstract

Hardened concrete is a brittle composite materials characterized by non-homogeneous internal structure. A review of literature regarding the requirements of ingredient-materials for producing high strength c,oncrete (HSC) along with the results of an experimental study on achieving HSC has been reported in this thesis paper. Use of quality materials, smaller water-binder ratio, larger ratio of coarse aggregate (CA) to fine aggregate (FA). smaller size of coarse aggregate, and suitable admixtures with their optimum dosages are found necessary to produce HSC. In the experimental study. the targeted strengths of concretes were from 60 MPa to 130 MPa. Trvo different ratio (C: FA:CA:1:1.5:3 and l:2:4) were considered for determining concrete strength. Water cement ratio was considered 0.45 for the concrete mix. Test results are found to suppoft the reviewed information on HSC production. Also the water-binder ratio and the suitable admixtures with the.ir optimum dosages are found to be the most important parameters for producing HSC.