Han Jae-Woong, Jeon Ji-Hong, Park Chan-Gi
Department of Bio-Industry Engineering, Koungju National University, Yesan 340-702, Korea.
Department of Environmental Engineering, Andong National University, 1375 Gyeongdong Street, Andong 760-749, Korea.
Materials (Basel). 2015 Oct 1;8(10):6728-6737. doi: 10.3390/ma8105339.
We evaluated the strength and durability characteristics of latex-polymer-modified, pre-packed pavement repair concrete (LMPPRC) with a rapid-set binder. The rapid-set binder was a mixture of rapid-set cement and silica sand, where the fluidity was controlled using a latex polymer. The resulting mix exhibited a compressive strength of ¥21 MPa and a flexural strength of ¥3.5 MPa after 4 h of curing (i.e., the traffic opening term for emergency repairs of pavement). The ratio of latex polymer to rapid-set binder material was varied through 0.40, 0.33, 0.29, and 0.25. Mechanical characterization revealed that the mechanical performance, permeability, and impact resistance increased as the ratio of latex polymer to rapid-set binder decreased. The mixture exhibited a compressive strength of ¥21 MPa after 4 h when the ratio of latex polymer to rapid-set binder material was ¤0.29. The mixture exhibited a flexural strength of ¥3.5 MPa after 4 h when the ratio of latex polymer to rapid-set binder material was ¤0.33. The permeability resistance to chloride ions satisfied 2000 C after 7 days of curing for all ratios. The ratio of latex polymer to rapid-set binder material that satisfied all conditions for emergency pavement repair was ¤0.29.
我们评估了采用速凝粘结剂的乳胶聚合物改性预包装路面修复混凝土（LMPPRC）的强度和耐久性特性。速凝粘结剂是速凝水泥和硅砂的混合物，其流动性通过乳胶聚合物进行控制。养护4小时后（即路面紧急修复的通车期限），所得混合料的抗压强度为21MPa，抗弯强度为3.5MPa。乳胶聚合物与速凝粘结剂材料的比例分别为0.40、0.33、0.29和0.25。力学特性表明，随着乳胶聚合物与速凝粘结剂比例的降低，力学性能、渗透性和抗冲击性均有所提高。当乳胶聚合物与速凝粘结剂材料的比例≤0.29时，混合料养护4小时后的抗压强度为21MPa。当乳胶聚合物与速凝粘结剂材料的比例≤0.33时，混合料养护4小时后的抗弯强度为3.5MPa。所有比例的混合料在养护7天后对氯离子的抗渗性均满足2000C。满足路面紧急修复所有条件的乳胶聚合物与速凝粘结剂材料的比例≤0.29。
