Investigation of slag cement quality through the analysis of its efficiency coefficient

The research efforts on the strength development of slag cements have seen a great progress. Such evolution prediction constitutes a major concern of the construction engineers interested in predicting the removing of the framework or the application of the pre-stressing at suitable ages. The slag concrete strength prediction, using some models, has been studied using the equivalent binder concept. This has led to define an efficiency coefficient of slag which determines the latter according to the cement. Results of this investigation indicates that this coefficient characterizes well the slag and enables to predict the slag cement strength at different ages and replacement rate from the reference cement made without slag. This coefficient has been identified according to the age, the replacement rate, the specific surface area of the slag and the curing temperature.