The effect of Dolomite powder and Fly ash on durability properties of self-compacting concrete

Abstract This study aims to assess the effectiveness of dolomite mineral admixture in the production of self-compacting concrete (SCC). The characteristics of concrete at 7 and 28 days of hardening were evaluated. SCC mixtures with different amounts of dolomite powder and fly ash (FA) at a constant composition were made. It has been noted that the flow ability of SCC mixes gets better with increasing percentages of dolomite. In addition to its mechanical characteristics, the durability of mixes containing SCC has been studied, including water absorption, sorptivity, and permeability to chloride ions and acid attack. After 28 days, a strength of 61 MPa was achieved with a 20% DP replacement level mixture, which is 31.38% higher than the control SCC mix. Along with the compressive strength of SCC, parameters affecting the durability of SCC such as Rapid chloride penetration test (RCPT), Sorptivity, water absorption and hydrochloric acid attack were also studied at 28 days. The utmost resistance to permeability of chloride ions was attained.