Research on the performance of mechanically sprayed modified acrylic emulsion mortar and its application in thin-layer repair
FENG Jiarui
WANG Dong
SHI Mingjian
ZHU Yeran
CHEN Guoxin
DU Zhiqin
XU Yiwen
Abstract：By optimizing critical factors such as the dosage of latex modifying agent,modified latex,and water-cement ratio,a systematic study was conducted on the mechanical properties,bond performance,workability,and construction process parameters of mechanically sprayed modified acrylic emulsion mortar.The results demonstrate that the optimal dosages of the modifying agent and modified latex are 1.0%and 15%,respectively.The 28-day compressive strength and flexural strength of the prepared mortar were increased by 18.1%and 11.4%,respectively.Additionally,the optimal process parameters for mechanical spraying were determined:the initial consistency of the mortar should be controlled at(110±5)mm,the substrate treatment should involve sufficient water sat-uration combined with an acrylic emulsion paste(cement to acrylic emulsion mass ratio of 1∶0.8),and the thickness for one-time spraying should be 10 mm.Compared to manual application of acrylic emulsion mortar,mechanically sprayed modified acrylic emul-sion mortar exhibits higher construction efficiency,mechanical performance,and interfacial bond strength.Furthermore,the mechanical spraying process reduces labor and machinery costs by over 54%per square meter for the same construction thickness.
Keywords：acrylic emulsionrepair mortarmechanical spraying construction
Publication Date：2025-08-25
Online Publishing Date：2025-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 29-33,40 )