The performance of hardened wet-process sprayed mortars

摘要

This paper, which reports on part of a three-year research project into wet-process sprayed mortars and concretes for repair, investigates the hardened performance of wet-process sprayed mortars. Seven commercially available preblended repair mortars were pumped and sprayed through a worm pump. Three through a piston pump and two through a dry-spray machine. A laboratory-designed mortar was also worm and piston pumped. The properties measured included compressive and flexural strength, tensile bond strength, hardened density, modulus of elasticity, air permeability, sorptivity, and drying and restrained shrinkage.