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A platform for research: civil engineering, architecture and urbanism
Machine-made sand self-compacting concrete
The invention relates to a machine-made sand self-compacting concrete, which is composed of cement, mineral powder, fly ash, machine-made sand, broken stone, an additive and water, and the concrete comprises the following components per cubic meter: 435kg/m3 of cement, 87kg/m3 of mineral powder, 58kg/m3 of fly ash, 817kg/m3 of machine-made sand, 837kg/m3 of broken stone, 6.38 kg/m3 of additive and 157kg/m3 of water. According to the invention, 5-20 continuously-graded secondarily-polished broken stones are adopted, so that the flowability and compactness of the concrete are improved; cement is replaced by a large-dosage mineral admixture, so that hydration shrinkage of the cement is reduced; and the polycarboxylic acid type additive is adopted, polycarboxylic acid contains an air entraining component, the flowing self-compacting performance of the concrete can be improved, the time expansion degree loss of the polycarboxylic acid type additive is kept unchanged within 3 hours, river sand is replaced by machine-made sand, and the environmental protection property is improved.
本发明涉及一种机制砂自密实混凝土，所述自密实混凝土由水泥、矿粉、粉煤灰、机制砂、碎石、添加剂和水组成，按照单方用量计，该混凝土各成分的用量如下：水泥435kg/m3,矿粉87kg/m3，粉煤灰58kg/m3,机制砂817kg/m3,碎石837kg/m3，添加剂6.38kg/m3，水157kg/m3。本发明采用5‑20的连续级配二次打磨过的碎石，增加混凝土的流动性、致密性；大掺量矿物掺合料取代水泥，减少水泥水化收缩；采用聚羧酸型添加剂，聚羧酸含有引气成分，可以改善混凝土的流动自密实性能，聚羧酸型外架剂经时扩展度损失保持在3小时不变，采用机制砂替代河砂，提升环保性。
Machine-made sand self-compacting concrete
The invention relates to a machine-made sand self-compacting concrete, which is composed of cement, mineral powder, fly ash, machine-made sand, broken stone, an additive and water, and the concrete comprises the following components per cubic meter: 435kg/m3 of cement, 87kg/m3 of mineral powder, 58kg/m3 of fly ash, 817kg/m3 of machine-made sand, 837kg/m3 of broken stone, 6.38 kg/m3 of additive and 157kg/m3 of water. According to the invention, 5-20 continuously-graded secondarily-polished broken stones are adopted, so that the flowability and compactness of the concrete are improved; cement is replaced by a large-dosage mineral admixture, so that hydration shrinkage of the cement is reduced; and the polycarboxylic acid type additive is adopted, polycarboxylic acid contains an air entraining component, the flowing self-compacting performance of the concrete can be improved, the time expansion degree loss of the polycarboxylic acid type additive is kept unchanged within 3 hours, river sand is replaced by machine-made sand, and the environmental protection property is improved.
本发明涉及一种机制砂自密实混凝土，所述自密实混凝土由水泥、矿粉、粉煤灰、机制砂、碎石、添加剂和水组成，按照单方用量计，该混凝土各成分的用量如下：水泥435kg/m3,矿粉87kg/m3，粉煤灰58kg/m3,机制砂817kg/m3,碎石837kg/m3，添加剂6.38kg/m3，水157kg/m3。本发明采用5‑20的连续级配二次打磨过的碎石，增加混凝土的流动性、致密性；大掺量矿物掺合料取代水泥，减少水泥水化收缩；采用聚羧酸型添加剂，聚羧酸含有引气成分，可以改善混凝土的流动自密实性能，聚羧酸型外架剂经时扩展度损失保持在3小时不变，采用机制砂替代河砂，提升环保性。
Machine-made sand self-compacting concrete
一种机制砂自密实混凝土
SUN HAIFENG (author) / XU CHAOYANG (author) / WU LILI (author)
2021-07-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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