Experimental Study and Mathematical Modeling of Mechanical Properties of Basalt Fiber-Reinforced Recycled Concrete Containing a High Content of Construction Waste

Abstract

Herein, we conducted an experimental test on basalt fiber-reinforced concrete with a high content of construction and demolition waste and then established some mathematical models based on Taylor’s formula. The concrete was prepared by using recycled clay brick powder in place of cement and recycled coarse aggregates as a substitution for natural coarse aggregates. The basalt fiber in weight dosages of 0, 0.1, 0.3, and 0.5% was used for reinforcement. The results showed that the compressive strength of concrete declined as the content of recycled aggregates increased, while the compressive strength first increased and then decreased as the basalt fiber dosage lifted. Regarding the splitting tensile strength, the reinforcement effect of basalt fiber in concrete with a high content of recycled aggregate is more significant when compared to its to its counterpart, which contains no or fewer recycled aggregates. The concrete with 0.5% basalt fiber dosage and 100% recycled aggregate content retains an equivalent compressive strength as to that of natural aggregate concrete and has about a 90% splitting tensile strength. In addition, the cubic function in comparison to the quadratic function has a higher fitting accuracy.

Effect of Brick Aggregate Content on Performance of Recycled Construction-Solid-Waste Aggregate

“…There are bottlenecks in the development of technology for the separation of the two; therefore, the recycling and utilization of brick–concrete mixed aggregates are particularly important [ 13 , 14 ]. The hardness of recycled brick aggregate from broken brick slag is low, which affects the strength and stability of mixed recycled construction-solid-waste aggregate [ 15 , 16 ]. Previous research studies have shown that brick aggregate content has a significant impact on the volume index of mixed recycled aggregate [ 17 ]; specifically, with the increase in brick aggregate content, the apparent density increases, and the maximum dry density decreases [ 18 , 19 ].…”

Impact of basalt fiber reinforced concrete in protected buildings: a review

“…To evaluate changes in the mechanical properties of recycled concrete, basalt fiber dosages of 0, 0.1, 0.3, and 0.5% are incorporated into the reinforced recycled concrete with basalt fibre (Chen and Chen, 2023). The findings indicated that concrete with 0.5% basalt fiber and 100% recycled aggregates exhibited the best compressive strength and a 90% improvement in tensile strength.…”