Sulfate Resistance of Cement-stabilized Materials Incorporating Recycled Brick-concrete Aggregate with Different Particle Sizes

Abstract

This study meticulously examined the compaction and sulfate erosion resistance of cement-stabilized materials incorporating recycled brick-concrete aggregate (RBCA). To explore the effects of recycled brick aggregate (RBA) with varying particle sizes, three size ranges (4.75–9.5 mm, 9.5–19 mm and 19–31.5 mm) were used to replace 20% of the corresponding particle sizes of recycled concrete aggregate (RCA) in cement-stabilized materials. The findings indicated that cement-stabilized materials utilizing RBA and RCA exhibited a lower maximum dry density and a higher optimum moisture content than natural aggregate cement-stabilized materials. The use of RBA with a particle size of 4.75–9.5 mm resulted in a lower maximum dry density and a higher optimum moisture content than 9.5–19 mm and 19–31.5 mm. Furthermore, the 7-day unconfined compressive strength of RBCA cement-stabilized materials with RBA of 4.75–9.5 mm demonstrated superior results compared to those with larger particle sizes. Regarding sulfate erosion resistance, the mass loss and unconfined compressive strength loss of the RBCA cement-stabilized materials at 56 days were highest for the 19–31.5 mm particle size of the RBA. In terms of compaction and sulfate resistance, it is recommended to use 4.75–19 mm RBA in RBCA cement-stabilized materials.

RIGHTS & PERMISSIONS

Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature