摘   要：通过单掺、复掺无机材料和有机材料对再生大骨料进行改性处理，研究了改性再生大骨料混凝土(MAC)与天然骨料混凝土(NAC)、再生骨料混凝土(RAC)的耐久性能差异。结果表明：相同龄期下，NAC的抗渗性能、抗氯离子渗透性能及抗碳化性能均最好，MAC次之，RAC最差；随着龄期的延长，RAC碳化深度的增幅最大，MAC次之，NAC最小。 Abstract: The recycled big aggregate was modified through the single admixture and compound admixture of inorganic materials and organic materials, the difference in durability between modified recycled big aggregate concrete(MAC), natural aggregate concrete(NAC) and recycled aggregate concrete(RAC) was studied. The results show that at the same age, NAC has the best anti-permeability, anti-chloride ion permeability and anti-carbonization properties, followed by MAC, and RAC is the worst. With the extension of age, the increase in RAC carbonization depth is the largest, followed by MAC, and NAC is the smallest.

黄卓杰，陈建国，陈德伟,等.改性再生大骨料混凝土耐久性能研究[J].混凝土与水泥制品,2021(7):93-97. HUANG Z J,CHEN J G,CHEN D W,et al.Study on the Durability of Modified Recycled Big Aggregate Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):93-97.

摘   要：研究了不同掺量的废玻璃粉混凝土在1.5 m和2.0 m落锤高度下的动态力学性能，并提出了一种表征废玻璃粉混凝土动态力学响应的动态损伤本构方程。结果表明：废玻璃粉混凝土的抗压强度随着废玻璃粉掺量的增加而降低；利用MATLAB程序计算得到的分形维数来表征废玻璃粉混凝土的损伤因子是完全可行的；修正后的ZWT非线性率型本构方程的理论曲线与试验曲线吻合较好。 Abstract: The dynamic mechanical properties of waste glass powder concrete with different content under 1.5 m and 2.0 m drop weight height were studied, and a dynamic damage constitutive equation was put forward to characterize the dynamic response of waste glass powder concrete. The results show that the compressive strength of the waste glass powder concrete gradually decreases with the increase of the waste glass powder content. It is completely feasible to use the fractal dimension calculated by MATLAB program to characterize the damage factor of waste glass powder concrete, and the theoretical curve of the modified ZWT nonlinear rate constitutive equation is in good agreement with the experimental curve.

柯国军,许欣,方耀楚,等.废玻璃粉混凝土的动态损伤本构方程[J].混凝土与水泥制品,2021(7):98-101. KE G J,XU X,FANG Y C,et al.Dynamic Damage Constitutive Equation of Waste Glass Powder Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):98-101.

摘   要：研究了不同掺量的可再分散乳胶粉、纤维素醚、聚羧酸高效减水剂单掺对钼尾矿砂抹面砂浆力学性能的影响，并通过正交试验确定了3种外加剂对砂浆性能影响的顺序，得出了钼尾矿砂抹面砂浆最佳配合比为胶砂比1∶3，减水剂0.8%，羟丙基甲基纤维素醚0.15%，可再分散乳胶粉1%。 Abstract: The effects of three admixtures, redispersible latex powder, cellulose ether and polycarboxylate superplasticizer on the mechanical properties of molybdenum tailing mortar were studied. The order of the effects of the three additives on the performance of the mortar was determined through orthogonal experiments, and the best ratio of molybdenum tailings plastering mortar was found to be 1∶3,  the water reducing agent was 0.8%, and the hydroxypropyl methyl fiber was 15% and redispersible latex powder was 1%.

马挺,张美香,田崇霏,等.外加剂对钼尾矿砂抹面砂浆力学性能的影响[J].混凝土与水泥制品,2021(7):102-104. MA T,ZHANG M X,TIAN C F,et al.Effects of Additives on the Performance of Molybdenum Tailings Plastering Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):102-104.