STUDIES ON STRENGTH CHARACTERISTICS OF NORMAL CONCRETE WITH DOLOMITE AND GGBS AS ADMIXTURES
Keywords:
Dolostone mineral, Dolomite powder, GGBS, supplementary cementitious material, Compressive strength, Flexural strength, Split tensile strength.Abstract
Concrete is the most widely used construction material in civil engineering construction because of its good
compressive strength and stability. Concrete industry is now looking for the supplementary cementitious materials and
the industrial by-products with the objectives to reduce the CO2 emission which is harmful to the environment. Dolomite
powder is one of the suitable supplementary cementitious materials, which is obtained by powdering the „Dolostone
„mineral. Present investigations are carried out to study the feasibility of applications of Dolomite powder in effective
manner to replace cement partially in concrete. Presently, the mechanical properties of M30 grade concrete are studied
with the partial replacement of cement by Dolomite powder which ranges from 0 to 25 percent. The optimum Dolomite
powder percentages in concrete to ascertain maximum compressive strength as well as tensile strength were determined.
Keeping the optimum percentage dosage of Dolomite as constant in referred concrete, cement is further replaced with
GGBS percentage which ranges from 5 to 20 percent. Test results reveal that the maximum strength (compressive and
tensile) were attained for the mix with 10 % Dolomite powder in combination with 10% GGBS powder as partial
replacement of cement.
