Mortar Cracking Reduction Method Based on Material Composition and Constraints
WANG Qiongqiong
TANG Liang
LI Guoyou
WANG Qingxuan
WANG Deng
Abstract：Based on the prediction equation for mortar cracking,a new crack-reduction method for mortar by considering material composition and constraints was proposed.The effectiveness of this new method under different environmental conditions was validated both theoretically and experimentally.To enhance the practical value of the crack-reduction method,various constraint-reducing techniques were investigated,including applying grease lubricant on the sides and base of wooden molds,laying plastic film on the base of wooden molds,and placing a 3 mm-thick layer of retarding-type neat paste between the plastic films on the mold base.The effects of these methods on crack reduction were also evaluated.The results demonstrate that the new crack-reduction method by reducing the water-to-binder ratio,decreasing constraint intensity,and increasing the sand-to-cement ratio significantly improves the crack resistance of mortar.Among the constraint-reducing techniques,placing a 3 mm-thick layer of retarding-type neat paste between the plastic films on the mold base reduced the constraint intensity of mortar specimens by 66%,showing a notable crack-reduction effect.
Keywords：mortarcracking prediction equationnew crack-reduction methodconstraint
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 559-564 )