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A platform for research: civil engineering, architecture and urbanism
Ultra-long distance pumping concrete and preparation method thereof
The invention discloses ultra-long-distance pumping concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by mass: 140 to 160 parts of cement, 780 to 810 parts of fine aggregate, 900 to 1100 parts of coarse aggregate, 180 to 210 parts of mineral powder, 80 to 90 parts of fly ash, 160 to 180 parts of water, 4 to 8 parts of high-flow modification additive and 2 to 4 parts of polycarboxylic acid water reducer, wherein the molecular chain of the high-flow modification additive contains amido. The high-flowability modification additive forms a three-dimensional adsorption structure on the surfaces of cement particles, has large steric hindrance, can effectively prevent aggregation of the cement particles, improves the dispersibility of the concrete, significantly enhances the flowability, gradually hydrolyzes amido in the middle and later periods, gradually consumes excessive free water in the concrete, inhibits the occurrence of segregation, and improves the performance of the concrete. And the formed cross-linked network structure can continuously maintain the dispersity of the system.
本申请公开了一种超长距离泵送混凝土及其制备方法，该混凝土包括以下质量份数的原料：水泥140～160份、细骨料780～810份、粗骨料900～1100份、矿粉180～210份、粉煤灰80～90份、水160～180份、高流动改性助剂4～8份，聚羧酸系减水剂2～4份，其中高流动改性助剂的分子链上含有酰胺基。高流动改性助剂在水泥颗粒表面形成立体吸附结构，其空间位阻大，能够有效防止水泥颗粒的聚集，混凝土的分散性提高，流动性显著增强，中后期酰胺基逐渐水解，混凝土中多的自由水逐渐被消耗，抑制离析现象的发生，形成的交联网状结构能够持续维持体系的分散性。
Ultra-long distance pumping concrete and preparation method thereof
The invention discloses ultra-long-distance pumping concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by mass: 140 to 160 parts of cement, 780 to 810 parts of fine aggregate, 900 to 1100 parts of coarse aggregate, 180 to 210 parts of mineral powder, 80 to 90 parts of fly ash, 160 to 180 parts of water, 4 to 8 parts of high-flow modification additive and 2 to 4 parts of polycarboxylic acid water reducer, wherein the molecular chain of the high-flow modification additive contains amido. The high-flowability modification additive forms a three-dimensional adsorption structure on the surfaces of cement particles, has large steric hindrance, can effectively prevent aggregation of the cement particles, improves the dispersibility of the concrete, significantly enhances the flowability, gradually hydrolyzes amido in the middle and later periods, gradually consumes excessive free water in the concrete, inhibits the occurrence of segregation, and improves the performance of the concrete. And the formed cross-linked network structure can continuously maintain the dispersity of the system.
本申请公开了一种超长距离泵送混凝土及其制备方法，该混凝土包括以下质量份数的原料：水泥140～160份、细骨料780～810份、粗骨料900～1100份、矿粉180～210份、粉煤灰80～90份、水160～180份、高流动改性助剂4～8份，聚羧酸系减水剂2～4份，其中高流动改性助剂的分子链上含有酰胺基。高流动改性助剂在水泥颗粒表面形成立体吸附结构，其空间位阻大，能够有效防止水泥颗粒的聚集，混凝土的分散性提高，流动性显著增强，中后期酰胺基逐渐水解，混凝土中多的自由水逐渐被消耗，抑制离析现象的发生，形成的交联网状结构能够持续维持体系的分散性。
Ultra-long distance pumping concrete and preparation method thereof
一种超长距离泵送混凝土及其制备方法
ZHENG LIANDE (author) / JIN XIN (author) / GE JIANWEI (author)
2024-03-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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