Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention provides carbon dioxide driven hardening ultra-high performance concrete. The ultra-high performance concrete comprises the following components in percentage by weight: 60-80% of low-calcium negative carbon clinker, 0-30% of steel slag powder, 0-20% of silica fume, 10-20% of a CO2 pre-solvent solution and 0.5-5% of a water reducing agent. The invention also provides a preparation method of the ultra-high performance concrete. According to the method, CO2 in industrial tail gas is absorbed in advance by using an alcohol amine solution, and gas-phase CO2 is converted into the alcohol amine solution to be used as a mixing aqueous solution. After mixing is completed, the reaction of clinker in the concrete and CO2 begins to be carried out, and the situation that the strength cannot be improved due to the fact that CO2 cannot be diffused into the concrete is avoided. Meanwhile, the morphology of the product calcium carbonate is modified by the alkylol amine molecules, so that the product calcium carbonate grows into a fibrous shape from a cubic morphology, fibers of traditional ultra-high performance concrete are replaced, and the breaking strength of the CO2-driven hardened ultra-high performance concrete is improved.
本发明提供一种二氧化碳驱动硬化的超高性能混凝土，按照重量百分比所述超高性能混凝土包括60‑80％低钙负碳熟料、0‑30％钢渣粉、0‑20％硅灰、10‑20％CO2预溶剂溶液及0.5‑5％减水剂。本发明还提供该超高性能混凝土的制备方法。本发明以醇胺溶液预先吸收工业尾气中的CO2，将气相CO2转化到醇胺溶液中作为拌合水溶液使用。拌合完成后，混凝土内部的熟料与CO2的反应开始进行，避免CO2无法扩散到内部导致的强度无法提高。同时，醇胺分子修饰产物碳酸钙的形貌，使产物碳酸钙由立方形貌生长为纤维状，替代传统超高性能混凝土的纤维，提升CO2驱动硬化的超高性能混凝土的抗折强度。
The invention provides carbon dioxide driven hardening ultra-high performance concrete. The ultra-high performance concrete comprises the following components in percentage by weight: 60-80% of low-calcium negative carbon clinker, 0-30% of steel slag powder, 0-20% of silica fume, 10-20% of a CO2 pre-solvent solution and 0.5-5% of a water reducing agent. The invention also provides a preparation method of the ultra-high performance concrete. According to the method, CO2 in industrial tail gas is absorbed in advance by using an alcohol amine solution, and gas-phase CO2 is converted into the alcohol amine solution to be used as a mixing aqueous solution. After mixing is completed, the reaction of clinker in the concrete and CO2 begins to be carried out, and the situation that the strength cannot be improved due to the fact that CO2 cannot be diffused into the concrete is avoided. Meanwhile, the morphology of the product calcium carbonate is modified by the alkylol amine molecules, so that the product calcium carbonate grows into a fibrous shape from a cubic morphology, fibers of traditional ultra-high performance concrete are replaced, and the breaking strength of the CO2-driven hardened ultra-high performance concrete is improved.
本发明提供一种二氧化碳驱动硬化的超高性能混凝土，按照重量百分比所述超高性能混凝土包括60‑80％低钙负碳熟料、0‑30％钢渣粉、0‑20％硅灰、10‑20％CO2预溶剂溶液及0.5‑5％减水剂。本发明还提供该超高性能混凝土的制备方法。本发明以醇胺溶液预先吸收工业尾气中的CO2，将气相CO2转化到醇胺溶液中作为拌合水溶液使用。拌合完成后，混凝土内部的熟料与CO2的反应开始进行，避免CO2无法扩散到内部导致的强度无法提高。同时，醇胺分子修饰产物碳酸钙的形貌，使产物碳酸钙由立方形貌生长为纤维状，替代传统超高性能混凝土的纤维，提升CO2驱动硬化的超高性能混凝土的抗折强度。
Carbon dioxide driven hardened ultra-high performance concrete and preparation method thereof
一种二氧化碳驱动硬化的超高性能混凝土及其制备方法
08.11.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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