Experimental Study on Uniaxial Compressive Strength of Cement Mortar with Recycled Lightweight Aggregate

摘要

In order to study uniaxial compressive strength of the recycled lightweight aggregate cement mortar test cubes, replacement rate of recycled lightweight aggregate was selected as variables factors, uniaxial compression test of cement mortar was carried out with the use of five different recycled lightweight aggregate replacement rates (respectively 100%, 75%, 50%, 25%, 0%). The destruction process and failure mode was observed, the ultimate compressive strength value of test cubes was recorded, the cube compressive strength-recycled lightweight aggregate replacement rate curve was obtained, it analyzes the impact of factor on compressive strength test cubes. The results showed when the recycled lightweight aggregate replacement rate of lightweight aggregate cement mortar is 0%, its compressive strength is the highest; when the recycled lightweight aggregate replacement rate of lightweight aggregate cement mortar is 75%, its compressive strength is the ideal state; failure mode is similar to ordinary cement mortar, it occurred at the interface between lightweight aggregate concrete and cementations materials.