Summary
The results of dolomite powder on the sulfate resistance of cement-based supplies with water-binder ratio (w/b) of 0.55 and 0.36 have been investigated on this manuscript. Scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP) and strain testing machine have been used to find out the obvious morphology, micro-morphology, mass enhance charge, flexural energy and compressive energy of cement-based supplies containing dolomite powder. The sulfate resistance of mortars was improved with rising dolomite powder dosage. Usually, the flexural energy and compressive energy of mortars in Na2SO4 answer have been greater than these in water. Inside 150 days of immersion, the corrosion resistance coefficient and compressive corrosion resistance coefficient of mortars elevated with rising dolomite powder dosage. The pore construction of cement-based supplies grew to become extra compact with the addition of dolomite powder. Accordingly, the sulfate resistance was improved by controlling the dynamics stage on account of the truth that the pore construction of cement-based supplies was refined with the addition of dolomite powder. The 150-day compressive corrosion resistance coefficients of mortars with a w/b of 0.55 within the case of dolomite powder at 0 and 30 wt% substitute ranges have been lower than 1, suggesting that long-term immersion in sulfate answer elevated the deterioration charge of cement-based supplies.
