- 許 穎，劉 杰，唐天佑
引用本文摘 要: 目前，國內外所制備的再生骨料混凝土的強度值都較低，只能用于非承重構件，另外對再生骨料混凝土耐久性方面的研究仍不多。本文利用廢棄混凝土，按照所提出的一種新生產工藝制備再生骨料，然后按照要求配制成高強度再生骨料混凝土。研究發現：采用取代率為50%的再生粗骨料和取代率為30%的再生細骨料所配制的再生骨料混凝土強度能夠達到高強混凝土強度要求。此外，本文研究了高強再生骨料混凝土的耐久性能，探討了粉煤灰、二次攪拌、再生粗骨料最大粒徑和初始含水狀態對高強再生骨料混凝土的收縮性能、抗碳化性能、抗氯離子滲透性能和抗硫酸鹽侵蝕性能的影響。 Abstract: At present, the strength of recycled aggregate concrete is normally low in China and abroad and it can only be used for non-bearing components. Moreover, there are few studies on the durability of recycled aggregate concrete. In this paper, waste concrete is used to prepare recycled aggregate according to the new proposed preparation process, and high strength recycled aggregate concrete is then prepared. It is found that the strength of recycled aggregate concrete with 50% replacement rate of recycled coarse aggregate and 30% replacement rate of recycled fine aggregate could meet the requirement of high strength concrete. In addition, this study evaluates durability of high strength recycled aggregate concrete prepared by the new process. The influences of fly ash, mixing method, maximum size of recycled coarse aggregate and initial water content of recycled coarse aggregate on shrinkage, carbonation resistance, resistance to chloride ion penetration and sulfate attack are also investigated.
許穎,劉杰,唐天佑.高強再生骨料混凝土的耐久性能及影響因素研究[J].混凝土與水泥制品,2017(2):1-8. XU Y,LIU J, TANG T Y.Research on Durability and Influence Factors of High Strength Recycled Aggregates Concrete[J].China Concrete and Cement Products,2017(2):1-8.