Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
C70 self-compacting shrinkage-compensating concrete-filled steel tube and preparation method thereof
The invention discloses a C70 self-compacting shrinkage-compensating concrete-filled steel tube and a preparation method thereof. Every cubic meter of concrete is prepared from the following raw materials by mass: 450kg-470kg of cement, 45kg-70kg of fly ash or micro-beads, 40kg-55kg of silicon powder, 50kg-55kg of a composite expanding agent, 952kg-1008kg of coarse aggregate, 730kg-754kg of fine aggregate, 8.85kg-9.75kg of a high-performance water reducing agent and 163kg-171kg of water. According to the invention, the types of mineral admixture, fine aggregate and coarse aggregate are reasonably selected, the ball effect theory is fully utilized, and the viscosity is scientifically reduced by a physical viscosity reduction method, so that the high flowing property of the concrete is effectively guaranteed; and by optimizing the formulas of the water reducing agent and the expanding agent, the air content of concrete is reduced, the free expansion rate of concrete is increased for shrinkage compensation, debonding of concrete and the inner wall of a steel tube is avoided, and the volume stability of concrete is effectively guaranteed. Therefore, the technical problem on how to makethe working performance of the high-strength self-compacting shrinkage-compensating concrete-filled steel tube be matched with a 'pumping jacking method' construction process is solved.
本发明公开了一种C70自密实补偿收缩钢管混凝土及其制备方法，其每立方混凝土由以下质量的原材料组成：水泥450kg～470kg、粉煤灰或微珠45kg～70kg、硅粉40kg～55kg、复合膨胀剂50kg～55kg、粗集料952kg～1008kg、细集料730kg～754kg、高性能减水剂8.85kg～9.75kg、水163kg～171kg。本发明通过合理选择矿物掺和料、细集料、粗集料种类，并充分运用滚珠效应理论，通过物理降粘的方法科学降黏，有效保障混凝土的大流动性能；通过优化减水剂、膨胀剂配方，降低混凝土含气量、增加混凝土自由膨胀率进行补偿收缩，避免混凝土与钢管内壁脱粘，有效保障混凝土体积稳定性。从而解决了高强度自密实补偿收缩钢管混凝土工作性能与“泵送顶升法”施工工艺相匹配的技术难题。
C70 self-compacting shrinkage-compensating concrete-filled steel tube and preparation method thereof
The invention discloses a C70 self-compacting shrinkage-compensating concrete-filled steel tube and a preparation method thereof. Every cubic meter of concrete is prepared from the following raw materials by mass: 450kg-470kg of cement, 45kg-70kg of fly ash or micro-beads, 40kg-55kg of silicon powder, 50kg-55kg of a composite expanding agent, 952kg-1008kg of coarse aggregate, 730kg-754kg of fine aggregate, 8.85kg-9.75kg of a high-performance water reducing agent and 163kg-171kg of water. According to the invention, the types of mineral admixture, fine aggregate and coarse aggregate are reasonably selected, the ball effect theory is fully utilized, and the viscosity is scientifically reduced by a physical viscosity reduction method, so that the high flowing property of the concrete is effectively guaranteed; and by optimizing the formulas of the water reducing agent and the expanding agent, the air content of concrete is reduced, the free expansion rate of concrete is increased for shrinkage compensation, debonding of concrete and the inner wall of a steel tube is avoided, and the volume stability of concrete is effectively guaranteed. Therefore, the technical problem on how to makethe working performance of the high-strength self-compacting shrinkage-compensating concrete-filled steel tube be matched with a 'pumping jacking method' construction process is solved.
本发明公开了一种C70自密实补偿收缩钢管混凝土及其制备方法，其每立方混凝土由以下质量的原材料组成：水泥450kg～470kg、粉煤灰或微珠45kg～70kg、硅粉40kg～55kg、复合膨胀剂50kg～55kg、粗集料952kg～1008kg、细集料730kg～754kg、高性能减水剂8.85kg～9.75kg、水163kg～171kg。本发明通过合理选择矿物掺和料、细集料、粗集料种类，并充分运用滚珠效应理论，通过物理降粘的方法科学降黏，有效保障混凝土的大流动性能；通过优化减水剂、膨胀剂配方，降低混凝土含气量、增加混凝土自由膨胀率进行补偿收缩，避免混凝土与钢管内壁脱粘，有效保障混凝土体积稳定性。从而解决了高强度自密实补偿收缩钢管混凝土工作性能与“泵送顶升法”施工工艺相匹配的技术难题。
C70 self-compacting shrinkage-compensating concrete-filled steel tube and preparation method thereof
一种C70自密实补偿收缩钢管混凝土及其制备方法
WANG YOUXUE (Autor:in) / XIAO KAIJUN (Autor:in) / SUN ZHENGUO (Autor:in) / LI WEISHENG (Autor:in) / WEI HAILONG (Autor:in) / YANG YONG (Autor:in) / CHEN HAIMING (Autor:in) / CHEN ZAISONG (Autor:in) / GUO KE (Autor:in) / WU BO (Autor:in)
04.09.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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