Mechanical properties and energy absorption characteristics of basalt fiber plain woven fabric constrained building solid waste particles

In order to explore a new way of recycle use of building solid waste, a composite structure with building waste particles constrained by basalt fiber plain woven fabric was proposed. Its mechanical properties and energy absorption characteristics were investigated through quasi-static uniaxial compression test. The impact of the type of building solid waste particles, the size grade of the building solid waste particles, and the number of constrained layers of basalt plain woven fabric on the response process, failure mode, load transfer, and energy absorption was discussed, respectively. The results show that the peak load of waste brick particles (16.54 kN-27.89 kN) and waste concrete particles (17.99 kN-32.33 kN) under the constraint of single-layer basalt fiber plain woven fabric decrease with increasing particle size. Compared with waste concrete particles, although the waste brick particles provide lower peak load at each particle size grade, the latter exhibits a stable plateau stage (the plateau stress range is 0.87 MPa-1.26 MPa) and obvious densification strain (about 0.3), which is an ideal energy-absorbing structure. Increasing the number of constrained layers of basalt plain woven fabric for waste brick particles is able to significantly increase the peak load and specific energy absorption, however, it is not an ideal energy absorption structure due to the lack of plateau stage and obvious densification strain.