Research on the law of linear expansion rate of mortar with magnesium-based expansive sources under different temperature conditions
LI Li
ZHAO Jue
GE Bing
BIAN Xuejun
MA Yu
YIN Hang
SUN Jun
Abstract：Based on the measured data of mortar linear expansion rate under different temperatures and magnesia content,a hyperbolic prediction model of mortar linear expansion rate under temperatures was established.The chemical reaction kinetics the-ory and model fitting regression analysis were used to determine the reaction rate constant and the final linear expansion rate of mortar specimens,and the relationship between the reaction rate constant and temperature was established by Arrhenius equation,and the equivalent time was deduced by using the maturity function.Finally,the study established the prediction of linear expan-sion rate of mortar with magnesia expansive source at room temperature by rapid curing method,and verified the feasibility and accuracy of the prediction model.It can provide reference for the prediction of linear expansion rate of mortar with magnesia ex-pansive source in practical engineering,and also provide technical support for evaluating the potential hazard degree of magnesia on the volume of mortar.
Keywords：magnesium-based expansive sourcelinear expansion rate of mortarArrhenius equationequivalent time
Publication Date：2026-02-25
Online Publishing Date：2026-03-25(First online date of this platform, not the publication date of the document)
Pages：4( 16-19 )