Research on Early Warning System for Plastic Shrinkage Cracking of Cement Mortar Based on Constitutive Equations

Abstract:

Aiming at the plastic shrinkage cracking of cement mortar, the constitutive equations of it in laboratory were established by testing plastic tensile strength, plastic capillary shrinkage stress and water loss evaporation rate of mortar under different composition parameters, environmental parameters, initial structural parameters and constraints condition parameters. And the early warning system of it was explored. The results showed that the seven-element constitutive equation of plain mortar and the nine-element constitutive equation of mortar with polyvinyl alcohol (PVA) fiber can effectively predict the plastic shrinkage cracking state of mortar outdoors. An early warning system for it was initially established.

• Periodical: Key Engineering Materials (Volume 861)
• Pages: 438-445
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.861.438
• Online since: September 2020
• Authors: Yi Ping Ma*, Jie Fu, Han Zhang, Zheng Hang Ma, Shao Tong Yu, Lu You, Le Zhang, Guo You Li, Qiong Qiong Wang, Xiao Jie Yang
• Keywords: Cement Mortar, Constitutive Equation, Early Warning System, Plastic Shrinkage Cracking, Polyvinyl Alcohol Fiber

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