【摘要】 为探究再生混凝土骨料应用于路面半刚性基层时的收缩性能与抗冻性能，开展了不同掺量的再生混凝土骨料和磨耗再生混凝土骨料对水泥稳定碎石击实性能、温缩性能、干缩性能和抗冻性能影响的试验研究。试验结果表明：再生混凝土骨料显著提升了水泥稳定碎石的温缩系数，在50%、100%再生混凝土骨料掺量条件下，平均温缩系数较天然骨料分别提升了58.73%、89.38%；而掺入50%、100%磨耗再生混凝土骨料时，平均温缩系数较相同掺量的再生混凝土骨料分别降低了16.35%、19.42%。在干缩性能方面，掺入50%、100%再生混凝土骨料使水泥稳定再生碎石的干缩系数较天然骨料分别提升了10.53%、25.16%；而掺入50%、100%磨耗再生混凝土骨料时，干缩系数较相同掺量的再生混凝土骨料分别降低了9.47%、12.13%。此外，随着再生混凝土骨料掺量的增加，水泥稳定再生碎石冻融循环后的无侧限抗压强度逐渐下降。其中，掺入50%、100%再生混凝土骨料的水泥稳定再生碎石，在冻融循环20次后，其无侧限抗压强度较掺入相同掺量的磨耗再生混凝土骨料分别降低了2.62%、20.57%。更多还原

【Abstract】 To investigate the shrinkage and frost resistance performance of recycled concrete aggregates applied to semi-rigid pavement base, experimental studies were conducted on the effects of different dosages of recycled concrete aggregates and abrasion recycled concrete aggregates on the compaction performance, thermal shrinkage performance, dry shrinkage performance, and frost resistance of cement stabilized crushed stone. The experimental results showed that recycled concrete aggregates significantly improved the thermal shrinkage coefficient of cement stabilized crushed stone. Under the conditions of 50% and 100% recycled concrete aggregate content, the average thermal shrinkage coefficient was increased by 58.73% and 89.38% respectively than natural aggregates; When 50%and 100% abrasion recycled concrete aggregates were added, the average thermal shrinkage coefficient was reduced by 16.35% and 19.42% respectively than the recycled concrete aggregates with same dosage. In terms of dry shrinkage performance, the addition of 50% and 100% recycled concrete aggregates increased the dry shrinkage coefficient of cement stabilized recycled crushed stone by 10.53% and 25.16% respectively than natural aggregates; When 50%and 100% abrasion recycled concrete aggregates were added, the dry shrinkage coefficient was reduced by 9.47%and 12.13% respectively than the recycled concrete aggregates with same dosage. In addition, with the increase of recycled concrete aggregate content, the unconfined compressive strength of cement stabilized recycled crushed stone gradually decreased after freeze-thaw cycles. Among them, cement stabilized recycled crushed stone mixed with 50% and 100% recycled concrete aggregates showed a decrease of 2.62% and 20.57% in unconfined compressive strength than the worn recycled concrete aggregates with same dosage after 20 freeze-thaw cycles.更多还原