河海大学
国家自然科学基金项目（面上项目，重点项目，重大项目）,
Hohai University
The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
基于水热固化技术，以淤泥、电石渣、硼泥等固废为原料，制备固废基人工骨料，替代部分天然骨料运用于混凝土制备；分析人工骨料的水热固化微观机理及基本指标，探讨人工骨料对混凝土抗压强度和体积稳定性的影响机制.试验结果表明，人工骨料部分替代天然骨料并运用于混凝土具有可行性；人工骨料替代率25%、饱和度100%、w/c=0.55/0.40的人工骨料混凝土28d时的抗压强度分别达到32.0MPa/38.3MPa；人工骨料有利于改善混凝土的体积稳定性、促进水化进程，人工骨料替代率100%时的混凝土28d自收缩率降低了73.9%（w/c=0.40）.
Based on hydrothermal solidification, artificial aggregate was manufactured with solid waste such as silt, carbide slag and boron mud, which replaced part of natural aggregate in concrete. The micro-mechanism and the basic indexes of artificial aggregate were analyzed. Meanwhile, the influence mechanism of artificial aggregate on compressive strength and volume stability of concrete were discussed. The test results show that it is feasible to apply the artificial aggregate to concrete partly instead of natural aggregate. The compressive strength of artificial aggregate concrete with 25% replacement rate, 100% saturation and w/c=0.55/0.40 at 28d reached 32.0MPa/38.3MPa, respectively. Artificial aggregate is beneficial to improve the volume stability and promote the hydration process, and the 28d self-shrinkage with 100% replacement rate is reduced by 73.9% (w/c=0.40).
