Investigation of the water resistance of non-sintered wrap-shell lightweight aggregates with high content solid waste and its application in water permeable bricks

Xue, Kairu; Su, Meizhong; Yang, Xuechun; Qi, Jianquan; Liu, Mingyuan; Ju, Chenggong; Peng, Xiao; Yan, Wei

doi:10.1016/j.conbuildmat.2023.132612

Cited by 4 publications

(1 citation statement)

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“…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 ]. However, the effect of brick aggregate content on the mechanical performance of mixed recycled aggregates is still unclear.…”

Section: Introductionmentioning

confidence: 99%

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

Zhu,

Ding,

et al. 2024

Materials

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In road engineering, road construction requires a large amount of natural aggregate; its substitution with recycled construction-solid-waste aggregate not only saves resources but also reduces the burden on the environment. The main components of construction solid waste are concrete blocks and brick slag; the breakability of the latter can affect the performance of mixed recycled aggregate, which hinders the use of construction solid waste in road engineering applications. To analyze the applicability of recycled construction-solid-waste aggregate containing brick slag aggregate in the subgrade layer, the effect of brick aggregate content on the CBR (California bearing ratio) and crushing value of mixed recycled aggregates was evaluated based on laboratory tests, and the field compaction quality of the recycled aggregates was analyzed. The results show that the 9.5–19 mm mixed recycled aggregate samples were crushed to a higher degree during the compaction process. A brick aggregate content less than 40% had little effect on the performance of mixed recycled construction-solid-waste aggregate. It is recommended to use a 22 t road roller for five passes (two weak vibrations + two strong vibrations + one weak vibration) at a speed of 3 km/h in the main compaction stage of the subgrade filling.

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