Title:
Hydration, Rheology, and Strength of Ordinary Portland Cement (OPC)-Cement Kiln Dust (CKD)-Slag Binders
Author(s):
Kejin Wang, Maria S. Konsta-Gdoutos, and Surendra P. Shah
Publication:
Materials Journal
Volume:
99
Issue:
2
Appears on pages(s):
173-179
Keywords:
blended cement; heat of hydration; rheology; slag; strength.
DOI:
10.14359/11710
Date:
3/1/2002
Abstract:
This study investigates the characteristics of a binder system containing cement kiln dust (CKD), blast-furnace slag, and ordinary portland cement (OPC). The system consists of 0 to 50% CKD and 0 to 75% slag replacement for Type I cement, with a total amount of supplementary cementitious materials equal to or less than 75%. The study evaluates the heat of hydration, rheological behavior, and flexural and compressive strengths of pastes and mortars made with these binders. It also examines the effects of binder proportions on concrete properties. Tests demonstrate that properly designed OPC-CKD-slag binders display properties comparable to pure OPC or an OPC-CKD blend. A CKD-slag specimen made without portland cement also displays satisfactory compressive and flexural strength. This indicates that alkalis released from CKD may activate slag hydration.