Experimental Study on a GGBFS Activator Using a By-Product Salt

Abstract

The activator is very important for the use of high volume fraction slag in cement so that the compressive strength of cement complying with the requirements of codes. A new slag activator, which is from the by-product of magnesium chloride industry, is investigated experimentally. The test results show that the addition of the new activator increases the compressive strength of cement containing 69% slag effectively. Compared to the compressive strength of the reference cement (no activator added), the compressive strength of the cement with the new activator increases about 40%. The new activator has the similar performance as calcium chloride, which is a conventional slag activator. With the new activator, the compressive strength of cement containing 69% slag meets the requirements of standard GB1344-1999.