Title: Effects of Pre-Hydration on Compressive Strength of Quaternary Binders

Author(s): Suguru Goto, Thomas A. Bier, Keisuke Takahashi, and Tetsuhiro Sakai

Publication: Symposium Paper

Volume: 320

Issue:

Appears on pages(s): 30.1-30.112

Keywords: Anhydrite ; Blast furnace slag; Calcium-aluminate cement; Calcium sulfate; Compressive strength; Portland cement ; Pre-hydration ; Quaternary binders

DOI: 10.14359/51701068

Date: 8/1/2017

Abstract:
In order to reduce the total carbon footprint and the energy consumption in sustainable construction, cementitious materials are produced by increasing amounts of alternative secondary raw materials such as ground granulated blast-furnace slag. However, significant degradation of physical properties at early age can be occasionally observed since the clinker content is reduced with the utilization of alternative binders. Degradation at the early age can be compensated by the addition of materials containing calcium-aluminate phases and calcium sulphates. This study describes and explains the influence on compressive strength of moisture up-take in the dry state for a quaternary binder. The quaternary binder is composed of ordinary portland cement, ground granulated blast-furnace slag, calcium-aluminate cement and anhydrite. The results show that compressive strength of samples pre-hydrated at high moisture conditions was 1.2–1.6 times higher than that of the samples pre-hydrated under lower moisture conditions.