- 劉俊華1，孫 勇1，劉鳳利2，張承志2
引用本文摘 要：為實現建筑垃圾的再生利用和特細砂的大宗利用，將廢混凝土再生粗砂、廢磚再生粗砂分別與特細砂摻配，得到建筑垃圾再生混合砂，研究其對混凝土表觀密度、和易性、抗壓強度和劈裂抗拉強度的影響。試驗結果表明，建筑垃圾再生混合砂替代天然砂配制混凝土，可達到設計和易性和強度要求，并有利于降低容重；廢磚再生混合砂混凝土的韌性優于普通混凝土，而廢混凝土再生混合砂混凝土的韌性劣于普通混凝土。 Abstract: In order to achieve the recycling of construction wastes and comprehensive utilization of super-fine sand, the construction wastes mixed sand is made by super-fine sand partly replaced by recycled concrete coarse sand or recycled brick coarse sand. The influences of construction wastes mixed sand on the apparent density, workability, compressive strength and tensile splitting strength of concrete are studied. Based on comparison tests, conclusions can be drawn that concrete using construction wastes mixed sand instead of natural sand can meet the standard of the workability and strength design while decreasing concrete unit weight. The toughness of recycled brick mixed sand concrete is better than that of common concrete. However, the toughness of recycled concrete mixed sand concrete is just on the contrary.