Low-shrinkage recycled high-performance concrete and preparation method thereof

• Main Authors: WANG GUANJUN, LI HUI, XIE ZEYU, HAN SHOUPENG, SHI SHUAIFENG, ZHANG XIAODONG, FU YONGSHENG, YANG PENG, FAN ZHEZHE, WANG NAONAO
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to the technical field of recycling of waste cement concrete, and in particular, relates to low-shrinkage recycled high-performance concrete and a preparation method thereof. According to the technical scheme adopted for solving the technical problems, the low-shrinkage recycled high-performance concrete is mainly composed of the following components: coarse aggregate, fine aggregate, cement, water, coal ash, granulated superfine blast furnace slag, first fibers and a high-efficiency water reducing agent; the fine aggregate comprises reinforced recycled aggregate and sand; and the mass ratio of the recycled aggregate to the sand is 1:(7-9). Meanwhile, the invention provides a corresponding preparation method, and the shrinkage rate of the high-performance concrete is reduced. 本发明涉及废旧水泥混凝土再生利用技术领域，具体为一种低收缩再生高性能混凝土及其制备方法。本发明解决其技术问题所采用的技术方案是：一种低收缩再生高性能混凝土，主要由以下组分组成：粗骨料、细骨料、水泥、水、粉煤灰、粒化超细高炉矿渣、第一纤维、高效减水剂，所述细骨料包括经强化处理的再生骨料和砂，所述再生骨料和砂的质量比为1：(7-9)，同时提供了相应的制备方法，本发明降低高性能混凝土的收缩率。