基于基本的力学方法和耐久性方法研究了再生混凝土的抗压强度、抗碳化性能和抗冻性能.并采用压汞法对再生混凝土的孔结构进行研究.结果表明:再生混凝土的抗压强度比普通混凝土的抗压强度略有降低,孔隙率相比普通混凝土的孔隙率增加了49.5%;其抗碳化能力小于普通混凝土的抗碳化能力;再生混凝土的抗冻性远远小于普通混凝土的抗冻性,180次循环之后其质量损失率接近普通混凝土质量损失率的3倍.
The compressive strength,carbonation resistance and freezing resistance of recycled concrete were studied based on the basic mechanical method and the durability methods.And the pore structure of recycled concrete was analyzed by mercury intrusion porosimetry (MIP).The results show that the compressive strength of recycled concrete is slightly lower than that of ordinary concrete.The porosity of the recycled concrete is 49.5% higher than that of ordinary concrete.The carbonation resistance of recycled concrete is less than that of ordinary concrete.The freezing resistance of recycled concrete is much less than that of ordinary concrete, and its mass loss rate is 3 times of that of ordinary concrete after 180 cycles.
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