Mixture design of high performance recycled liquid crystal glasses concrete (HPGC)

This study investigated the best mixture design of high performance recycled liquid crystal glasses concrete (HPGC) using waste liquid crystal glass sand to replace part of the fine aggregate. The design of experiment (DOE) method was adopted to design the specimen variables. Fresh properties were examined, including slump, flowing slump and unit weight and hardened properties were examined, including compressive strength, elastic modulus, impact-echo, ultrasonic pulse velocity and surface resistance. Range analysis and analysis of variance (ANOVA) were conducted to determine the relationships between these properties and W/B, replacement ratios and n values. The results demonstrated that the ultrasonic pulse velocity and surface resistance of HPGC was higher than those of the control group. For the three n values, higher than ultrasonic pulse velocity was found at a replacement ratio of 30%. The replacement ratios, W/B, and relationships between n values were analyzed. F statistics indicated significant impact on the replacement ratio of 4.97 and W/B of 3.87, indicating that the main properties of the HPGC are determined by the replacement ratio and W/B. The range analysis results showed that the interaction between various factors with W/B = 0.28:1 and n = 1.4 has the most significant impact on compressive strength.

► The mixture design of high performance in concrete using recycled liquid crystal glasses to replace part of the fine aggregate.
► The ultrasonic pulse velocity and surface resistance of HPGC was higher than those of the control group.
► W/B and n values have significant effects on the compressive strength, thus validating the interaction effect of W/B × n found in the range analysis.
► Interaction between various factors with W/B = 0.28:1 and n = 1.4 has the most significant impact on compressive strength.