Preparation and performance of repair cement mortar modified by epoxy resin emulsion
ZHONG Huirong
JIANG Chengcheng
ZHA Yagang
YU Jianying
YAN Shilin
Abstract：Sulphoaluminate cement repair mortar was modified by epoxy resin emulsion.Effects of the ratio of polymer to cement on setting time,non-dispersion underwater and flexural bond strength was investigated and the microstructure of epoxy resin emulsion modified mortar was observed by scanning electron microscope (SEM).It was showed that setting time of the modified mortar increased with the increase of the ratio of polymer to cement.Non-dispersion underwater and the flexural bond strength of the repair mortar based with sulphoaluminate cement is greatly increased when the ratio of polymer to cement is not more than 0.l,but when the ratio of polymer to cement was increased regularly,flexural bond strength decreased.SEM observation showed that epoxy resin can form a continuous polymer film in the cement hydration products and sand surface,however,when the ratio of polymer to cement reached 0.2,the polymer film formed is too thick,which affects the bonding strength between the repair mortar and the old base.
Keywords：epoxy resin emulsionsulphoaluminate cementrepair mortarnon-dispersive underwaterbonding strength
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 33-35,57 )