A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-strength recycled concrete as well as preparation method and application thereof
The invention relates to the technical field of building materials, in particular to high-strength recycled concrete and a preparation method and application thereof, and the high-strength recycled concrete is prepared from the following raw materials in parts by weight: 290 to 443 parts of cement; 20 to 70 parts of fly ash; 20 to 70 parts of slag; 20 to 70 parts of silica fume; 20 to 70 parts of metakaolin; 650 to 750 parts of fine aggregate; 550 to 600 parts of natural coarse aggregate; 450 to 510 parts of recycled coarse aggregate; 4.0 to 7.0 parts of a water reducing agent; and 140 to 160 parts of water. The high-strength recycled concrete is designed and prepared on the basis of the service environment and load-bearing requirements of a recycled concrete structure, and mineral admixtures comprise coal ash, slag, silica fume and metakaolin. According to the preparation method, a pre-wetting-double slurry wrapping method is adopted, the recycled aggregate is subjected to pre-wetting, slurry wrapping and repeated stirring treatment, the internal microstructure of the concrete is enhanced, and the mechanical property of the recycled concrete and the durability of the recycled concrete in a composite salt erosion environment are improved.
本发明涉及建筑材料技术领域，具体来说是一种高强度再生混凝土及其制备方法和应用，由如下重量份数的原料制成：水泥290‑443份；粉煤灰20‑70份；矿渣20‑70份；硅灰20‑70份；偏高岭土20‑70份；细骨料650‑750份；天然粗骨料550‑600份；再生粗骨料450‑510份；减水剂4.0‑7.0份；水140‑160份。本发明基于再生混凝土结构的服役环境和承重要求，设计并制备一种高强度再生混凝土，其中矿物掺合料种类包括粉煤灰、矿渣、硅灰和偏高岭土；制备方法方面采用预湿‑双重裹浆法，对再生骨料进行预湿、裹浆和多次搅拌处理，增强混凝土内部微观结构，提升再生混凝土的力学性能和复合盐侵蚀环境下的耐久性。
High-strength recycled concrete as well as preparation method and application thereof
The invention relates to the technical field of building materials, in particular to high-strength recycled concrete and a preparation method and application thereof, and the high-strength recycled concrete is prepared from the following raw materials in parts by weight: 290 to 443 parts of cement; 20 to 70 parts of fly ash; 20 to 70 parts of slag; 20 to 70 parts of silica fume; 20 to 70 parts of metakaolin; 650 to 750 parts of fine aggregate; 550 to 600 parts of natural coarse aggregate; 450 to 510 parts of recycled coarse aggregate; 4.0 to 7.0 parts of a water reducing agent; and 140 to 160 parts of water. The high-strength recycled concrete is designed and prepared on the basis of the service environment and load-bearing requirements of a recycled concrete structure, and mineral admixtures comprise coal ash, slag, silica fume and metakaolin. According to the preparation method, a pre-wetting-double slurry wrapping method is adopted, the recycled aggregate is subjected to pre-wetting, slurry wrapping and repeated stirring treatment, the internal microstructure of the concrete is enhanced, and the mechanical property of the recycled concrete and the durability of the recycled concrete in a composite salt erosion environment are improved.
本发明涉及建筑材料技术领域，具体来说是一种高强度再生混凝土及其制备方法和应用，由如下重量份数的原料制成：水泥290‑443份；粉煤灰20‑70份；矿渣20‑70份；硅灰20‑70份；偏高岭土20‑70份；细骨料650‑750份；天然粗骨料550‑600份；再生粗骨料450‑510份；减水剂4.0‑7.0份；水140‑160份。本发明基于再生混凝土结构的服役环境和承重要求，设计并制备一种高强度再生混凝土，其中矿物掺合料种类包括粉煤灰、矿渣、硅灰和偏高岭土；制备方法方面采用预湿‑双重裹浆法，对再生骨料进行预湿、裹浆和多次搅拌处理，增强混凝土内部微观结构，提升再生混凝土的力学性能和复合盐侵蚀环境下的耐久性。
High-strength recycled concrete as well as preparation method and application thereof
一种高强度再生混凝土及其制备方法和应用
WANG JIABIN (author) / LIU HUIPING (author) / LI HENG (author) / CHEN XIANG (author) / HOU WEI (author) / HOU ZEYU (author) / WANG YU (author)
2021-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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