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A platform for research: civil engineering, architecture and urbanism
Steam-curing-free precast concrete and preparation method thereof
The invention discloses steam-curing-free precast concrete and a preparation method thereof. The concrete is prepared from the following raw materials: 360 to 380kg of ordinary Portland cement, 10 to 20kg of sulphoaluminate cement, 30 to 50kg of a composite admixture, 600 to 650kg of sand, 1150 to 1200kg of stones, 130 to 140kg of water, 3 to 5kg of a high-performance water reducing agent, 10 to 20kg of a nano C-A-S-H aluminum-doped hydrated calcium silicate suspension, 5-8kg of nano silica sol, 2 to 5kg of a composite early strength agent and 0.5-1kg of exciting agent. When the concrete is prepared, the ordinary Portland cement, the sulphoaluminate cement, the composite admixture, the sand and the stones are poured into a stirrer for dry mixing, and then the rest raw materials are sequentially added into the stirrer. The preparation method of the precast concrete is simple, under the condition that high-temperature steam curing is not adopted, the precast concrete enters a mold to be naturally cured for 8h, and the mold removal strength exceeds 22 MPa; and meanwhile, the durability of the precast concrete is improved, energy consumption is reduced, and the mold turnover efficiency is improved.
一种免蒸养预制混凝土及其制备方法，所述混凝土是由下述原料制成的：普通硅酸盐水泥360～380kg，硫铝酸盐水泥10～20kg，复合掺合料30～50kg，砂600～650kg，石子1150～1200kg，水130～140kg，高性能减水剂3～5kg，纳米C‑A‑S‑H即掺杂铝的水化硅酸钙悬浮液10～20kg，纳米硅溶胶5～8kg，复合早强剂2～5kg，激发剂0.5～1kg。在制备混凝土时，将普通硅酸盐水泥、硫铝酸盐水泥、复合掺合料、砂、石子倒入搅拌机中，干拌，然后在搅拌机中依次加入剩余的原料。本发明的预制混凝土制备方法简单，可以在不采用高温蒸养情况下，预制混凝土入模自然养护8h拆模强度超过22MPa，同时提高了预制混凝土的耐久性，节约了能耗，提高了模具的周转效率。
Steam-curing-free precast concrete and preparation method thereof
The invention discloses steam-curing-free precast concrete and a preparation method thereof. The concrete is prepared from the following raw materials: 360 to 380kg of ordinary Portland cement, 10 to 20kg of sulphoaluminate cement, 30 to 50kg of a composite admixture, 600 to 650kg of sand, 1150 to 1200kg of stones, 130 to 140kg of water, 3 to 5kg of a high-performance water reducing agent, 10 to 20kg of a nano C-A-S-H aluminum-doped hydrated calcium silicate suspension, 5-8kg of nano silica sol, 2 to 5kg of a composite early strength agent and 0.5-1kg of exciting agent. When the concrete is prepared, the ordinary Portland cement, the sulphoaluminate cement, the composite admixture, the sand and the stones are poured into a stirrer for dry mixing, and then the rest raw materials are sequentially added into the stirrer. The preparation method of the precast concrete is simple, under the condition that high-temperature steam curing is not adopted, the precast concrete enters a mold to be naturally cured for 8h, and the mold removal strength exceeds 22 MPa; and meanwhile, the durability of the precast concrete is improved, energy consumption is reduced, and the mold turnover efficiency is improved.
一种免蒸养预制混凝土及其制备方法，所述混凝土是由下述原料制成的：普通硅酸盐水泥360～380kg，硫铝酸盐水泥10～20kg，复合掺合料30～50kg，砂600～650kg，石子1150～1200kg，水130～140kg，高性能减水剂3～5kg，纳米C‑A‑S‑H即掺杂铝的水化硅酸钙悬浮液10～20kg，纳米硅溶胶5～8kg，复合早强剂2～5kg，激发剂0.5～1kg。在制备混凝土时，将普通硅酸盐水泥、硫铝酸盐水泥、复合掺合料、砂、石子倒入搅拌机中，干拌，然后在搅拌机中依次加入剩余的原料。本发明的预制混凝土制备方法简单，可以在不采用高温蒸养情况下，预制混凝土入模自然养护8h拆模强度超过22MPa，同时提高了预制混凝土的耐久性，节约了能耗，提高了模具的周转效率。
Steam-curing-free precast concrete and preparation method thereof
一种免蒸养预制混凝土及其制备方法
ZHAO MINGMIN (author) / JIA ERPENG (author) / WANG YONGMEI (author) / TIAN YAO (author) / HUANG YUMEI (author) / LIU ZHAOYANG (author) / WANG YUQIAN (author) / DONG SHUQIANG (author) / LI QIANQIAN (author) / WANG JINCHUN (author)
2021-04-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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