Influence of temperature rising inhibitor on temperature and stress field of mass concrete

Abstract

As a new type of concrete admixture, concrete temperature rising inhibitor (TRI) can slow down the heat release rate of the initial hydration reaction of concrete. However, due to the lack of a clear feasibility analysis, its application in engineering is limited. In this paper, the thermodynamic parameters of concrete with different TRI are obtained by fitting the experimental data. At the same time, taking the sluice as an example, the influence of TRI on the temperature and stress field of mass concrete is studied by numerical simulation. The results show that when the content of TRI reaches 0.6% of the cementitious material, the temperature and stress peak value are obviously reduced, and the temperature control effect is obvious. Furthermore, the effect of TRI is inversely proportional to structure thickness, and its temperature control effect is more noticeable for mass thin-walled concrete structures. Compared with other temperature control measures, such as lowering the peak value of adiabatic temperature rise and the pouring temperature, the effect of TRI is more effective. It can be used as a means of temperature control in engineering and combined with other measures to put forward a more reasonable and economical temperature control scheme.