Temperature Control and Crack Suppression of Microencapsulated Phase Change Material-Modified Grout for Detachment Repair
ZOU Jiahua
MAO Xiaofei
LI Dongbo
SU Junxiang
WANG Wenzhe
Abstract：To address the detachment of mural plaster layers induced by temperature gradients and the limitations of conventional grout in temperature control,a microencapsulated phase change material(MPCM)-modified grout was developed.Its temperature control performance and crack inhibition mechanism were systematically analyzed through experiments and numerical simulations.The results show that MPCM exhibits good thermal stability,with a mass loss rate of only 0.65%after 200 phase change cycles.When the MPCM content is 15%,the compressive strength of the MPCM-modified grout specimen reaches 1.34 MPa,demonstrating good compatibility with the strength of the mural plaster layer.MPCM improves the temperature response behavior of the grout.Compared to the unmodified specimen,the grout with 15%MPCM shows a reduction in peak temperature by 4.9℃and a decrease in the heating rate by 5.2℃/h,effectively alleviating internal gradient stresses caused by rapid temperature changes.The incorporation of 15%MPCM reduces the crack tip stress in the grout by 9.3%to 12.1%,significantly inhibiting crack extension.The research findings provide a new approach for the study of detachment grout in murals and heritage site plasters.
Keywords：detachmentgroutmicroencapsulated phase change materialtemperature control propertycrack extension
Publication Date：2026-02-28
Online Publishing Date：2026-04-07(First online date of this platform, not the publication date of the document)
Pages：11( 270-280 )