Title: The Effect Of Various Reagents On The Heat Liberation Characteristics Of Portland Cement
Author(s): L. R. Fobrich
Publication: Journal Proceedings
Appears on pages(s): 161-184
The temperature rise of concrete caused by the hydration of the cement and the resulting tendency to crack due to subsequent cooling, have long been recognized. In this paper a method is described of controlling the heat evolution of cements by the addition of small quantities of active reagents. Data are presented showing the effects of a dispersing agent, an inorganic accelerator, an organic catalyst, and various combinations of these reagents, on the heat liberation characteristics of several cements. Data also are presented showing the effects on strength, durability, and shrinkage of concrete, of three combinations of the reagents which appeared to have practical value. One of these combinations was designed specifically for concrete in which heat evolution, particularly at the early ages, is important, and the other two were designed for use in ordinary concrete.