Epoxy resin can enhance the compressive strength of high-porosity cement foam. This is one of the findings of a study that Chinese researchers from Southwest University of Science and Technology have undertaken.
Different dosages of waterborne epoxy resin were added to cement slurries, which were used to prepare high-porosity cement foam via the pre-foaming method.
The results revealed that the resin resulted in improved workability and reduced yield stress and plastic viscosity of the cement foam slurries. Although the resin yielded increased air-void sizes, the mechanical properties of the cement foam improved. A compressive strength and thermal conductivity of 0.77 MPa and 0.069 W/m·K, respectively, at a porosity of 89.4%, were obtained for the resin-modified cement foam. Moreover, resin addition also resulted in a decrease in the water absorption and a slight increase in the thermal conductivity of the cement foam.
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