Interface Bonding Mechanism of Basic Magnesium Sulfate Cement-Based Resin Light-Transmitting Concrete
XU Xun
SUN Yongtao
LI Yingjiang
WANG Zonghao
YOU Panli
Abstract：Resin light-transmitting concrete(RLTC)was prepared using basic magnesium sulfate cement(BMSC).Interfacial shear strength testing,ultra-deep field 3D microscopy,and scanning electron microscopy(SEM)were used to analyze the interfacial bonding performance between the BMSC matrix and resin.The results indicate that there are few interface cracks between the BMSC matrix and the resin,with relatively narrow crack widths.A large number of needle-like 5·1·7 phase(5Mg(OH)2·MgSO4·7H2O)structure are observed at the interface,where micro-scale 5·1·7 phase crystals fill the pores between the matrix and resin,enhancing the mechanical interlocking effect.Compared to RLTC prepared with ordinary Portland cement,the interfacial bonding performance between the BMSC matrix and resin are significantly improved after curing,with a 59.2%increase in interface shear strength at 28 d.
Keywords：interface bondingbasic magnesium sulfate cementresinlight-transmitting concreteshear strength
Publication Date：2024-11-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1039-1046 )