摘   要：研究了盐雾侵蚀环境下不同掺量铁尾矿砂再生混凝土的抗氯离子侵蚀性能。结果表明：相同条件下，未掺铁尾矿砂再生混凝土的氯离子侵蚀深度远高于普通混凝土的氯离子侵蚀深度；随着铁尾矿砂掺量的增加，氯离子侵蚀深度先降后增，当铁尾矿砂掺量为30%~40%时，试件的氯离子侵蚀深度小于普通混凝土和未掺铁尾矿砂再生混凝土的氯离子侵蚀深度；相同侵蚀深度处的自由氯离子含量随铁尾矿砂掺量的增加先降后增，当铁尾矿砂掺量为40%时，自由氯离子含量总体上达到最低；总氯离子含量随侵蚀时间的延长变化不大，结合氯离子含量随侵蚀时间的延长而降低，同时自由氯离子含量随侵蚀时间的延长而增加。 Abstract: The chloride ion corrosion resistance of recycled concrete with different iron tailings content in salt spray environment was studied. The results show that the chloride ion erosion depth of recycled concrete without iron tailings is much higher than that of ordinary concrete under the same conditions. With the increase of the content of iron tailings, the chloride ion erosion depth decreases first and then increases, and when the content of iron tailings is 30%~40%, the chloride ion erosion depth is less than those of ordinary concrete and recycled concrete without iron tailings. The free chloride ion content at the same erosion depth decreases first and then increases with the increase of the content of iron tailings, and when the content of iron tailings is 40%, the free chloride ion content is generally the lowest. The total chloride ion content does not change much with the extension of erosion time, and the combined chloride ion content decreases with the extension of erosion time, and the free chloride ion content increases with the extension of erosion time.

王志齐,李涛.盐雾侵蚀环境下铁尾矿砂再生混凝土的耐久性试验研究[J].混凝土与水泥制品,2022(2):92-96. WANG Z Q,LI T.Experimental Study on Durability of Iron Tailings Recycled Concrete in Salt Spray Environment[J].China Concrete and Cement Products,2022(2):92-96.

摘   要：研究了钢渣粉替代部分水泥对超高性能混凝土（UHPC）性能的影响，验证了利用钢渣粉部分替代水泥制备生态型UHPC的可行性。结果表明：随着钢渣粉替代量的增加，UHPC的工作性得到改善；当钢渣粉替代量为200 kg/m3时，UHPC的密实度达到最大，且此时UHPC的抗压强度和抗氯离子渗透性能仍保持较好水平；随着钢渣粉替代量的增加，UHPC对生态环境的负面影响逐渐变小。 Abstract: The effect of steel slag powder replacing part of cement on the performance of ultra-high performance concrete(UHPC) was studied, and the feasibility of preparing ecological UHPC by partially replacing cement with steel slag powder was verified. The results show that with the increase of steel slag powder replacement amount, the workability of UHPC is improved. When the replacement amount of steel slag powder is 200 kg/m3, the compactness of UHPC reaches the maximum, and the compressive strength and chloride ion permeability of UHPC still maintain a good level. The negative impact of UHPC on the ecological environment gradually decreases with the increase of steel slag powder replacement amount.

王思雨,曾敏,胡方杰,等.利用钢渣粉制备生态型超高性能混凝土的研究[J].混凝土与水泥制品,2022(2):87-91. WANG S Y,ZENG M,HU F J,et al.Study on Preparation of Ecological Ultra-high Performance Concrete with Steel Slag Powder[J].China Concrete and Cement Products,2022(2):87-91.