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A platform for research: civil engineering, architecture and urbanism
High-flowability high-performance concrete with low cementing material content, and preparation method thereof
The invention discloses high-flowability high-performance concrete with a low cementing material content, and a preparation method thereof. The high-flowability high-performance concrete with the lowcementing material content comprises the following raw materials in parts by weight: 520-570 parts of a cementing material, 626-702 parts of medium sand, 1061-1152 parts of broken stone, 130-140 partsof water and 4.88-8.67 parts of a water reducing agent. The preparation method comprises the following steps: adding the medium sand, the broken stone and the cementing material into a stirrer, carrying out stirring for 0.5-1.5 min at a rotating speed of 40-60 r/min to prepare a mixture, sequentially adding the water and the water reducing agent into the stirrer, and continuing stirring for 3-5 min at the rotating speed to prepare the high-flowability high-performance concrete with the low cementing material content. The concrete has high flowability, does not need to be vibrated, can pass through a steel bar dense area by means of dead weight, reduces concrete quality defects caused by incapability of vibrating or uncompacted vibration compared with common concrete, and realizes high flowability and high performance of the concrete under the condition of a low use amount of the cementing material.
本发明公开一种低胶材高流态高性能混凝土及其制备方法，包括如下重量份原料：520‑570份胶凝材料，626‑702份中砂，1061‑1152份碎石，130‑140份水，4.88‑8.67份减水剂；将中砂、碎石和胶凝材料加入搅拌机中，在40‑60r/min的转速下搅拌0.5‑1.5min，制得混合料，之后将水和减水剂依次加入搅拌机中，在此转速下继续搅拌3‑5min，制得低胶材高流态高性能混凝土；具有较高的流动性，无需振捣，依靠自重可通过钢筋密集区，与普通混凝土相比，可降低因无法振捣或振捣不密实所带来的混凝土质量缺陷，而且在较低胶凝材料用量下，实现混凝土的高流态和高性能。
High-flowability high-performance concrete with low cementing material content, and preparation method thereof
The invention discloses high-flowability high-performance concrete with a low cementing material content, and a preparation method thereof. The high-flowability high-performance concrete with the lowcementing material content comprises the following raw materials in parts by weight: 520-570 parts of a cementing material, 626-702 parts of medium sand, 1061-1152 parts of broken stone, 130-140 partsof water and 4.88-8.67 parts of a water reducing agent. The preparation method comprises the following steps: adding the medium sand, the broken stone and the cementing material into a stirrer, carrying out stirring for 0.5-1.5 min at a rotating speed of 40-60 r/min to prepare a mixture, sequentially adding the water and the water reducing agent into the stirrer, and continuing stirring for 3-5 min at the rotating speed to prepare the high-flowability high-performance concrete with the low cementing material content. The concrete has high flowability, does not need to be vibrated, can pass through a steel bar dense area by means of dead weight, reduces concrete quality defects caused by incapability of vibrating or uncompacted vibration compared with common concrete, and realizes high flowability and high performance of the concrete under the condition of a low use amount of the cementing material.
本发明公开一种低胶材高流态高性能混凝土及其制备方法，包括如下重量份原料：520‑570份胶凝材料，626‑702份中砂，1061‑1152份碎石，130‑140份水，4.88‑8.67份减水剂；将中砂、碎石和胶凝材料加入搅拌机中，在40‑60r/min的转速下搅拌0.5‑1.5min，制得混合料，之后将水和减水剂依次加入搅拌机中，在此转速下继续搅拌3‑5min，制得低胶材高流态高性能混凝土；具有较高的流动性，无需振捣，依靠自重可通过钢筋密集区，与普通混凝土相比，可降低因无法振捣或振捣不密实所带来的混凝土质量缺陷，而且在较低胶凝材料用量下，实现混凝土的高流态和高性能。
High-flowability high-performance concrete with low cementing material content, and preparation method thereof
一种低胶材高流态高性能混凝土及其制备方法
LIU GANGLIANG (author) / WANG ZHONGWEN (author) / FU HAOBING (author) / TANG BOXUE (author) / ZHOU ZHIHONG (author) / LI TIANHAN (author) / WANG HUI (author) / LI MINGSHAO (author)
2021-03-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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