The effect of the source of cement SO 3 on the expansion of mortars

Sayed Horkoss, Gilles Escadeillas, Toufic Rizk, Roger Lteif
2016 Case Studies in Construction Materials  
A B S T R A C T In order to evaluate the risk of the source and quantity of cement SO 3 on the expansion properties of mortars, this paper studied the influence of Gypsum, Bassanite and clinker sulfate on the cement paste expansion and the formation of delayed ettringite. The investigation covers the mortar cured at 20 C and 80 C and stored in water. In contradiction to many studies, the results showed that the cement produced with high sulfur clinker had lower expansion than that produced with
more » ... classical gypsum or high soluble Bassanite. In addition to that, we have detected that the percentage of SO 3 , in the cement, could increase the risk of DEF if it surpasses the level of 3.5%. Also, the curing temperature at 80 C affects the microstructure of concrete by generating cracks in the cement paste.
doi:10.1016/j.cscm.2015.12.004 fatcat:twjzolt3zvd4lapfuvqeyavdcu