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A platform for research: civil engineering, architecture and urbanism
Nanocrystalline gel polymer additive for early-strength and high-strength sprayed concrete
The invention relates to an early-strength and high-strength sprayed concrete nanocrystalline gel polymer additive and a preparation method thereof, and aims to accurately regulate and control a cement hydration process and a microstructure formation and evolution process according to a cement hydration theory to develop a brand-new concrete admixture, and the preparation method comprises the following steps: 1) modifying nano cellulose through formylation; 2) preparing a nano metal oxide dispersion liquid; and (3) preparing a nanocrystalline gel polymer to realize the technical requirements of early strength and high strength of the sprayed concrete. By improving the dispersity of cement minerals in water, the contact area of solid-liquid reaction is increased, and early hydration of concrete is accelerated; by introducing the nano crystal nucleus, nucleation crystallization of cement hydration products is accelerated, the ion concentration in an electrolyte solution is rapidly reduced, and the hydration process is accelerated; the hydroformylated nanocellulose performs directional adsorption on each mineral phase in the cement, realizes mineral phase inactivation, accelerates the C3A reaction process, realizes accurate design of the whole hydration process, and realizes rapid hardening and early strength of the concrete.
本发明涉及一种早高强喷射混凝土纳米晶胶聚合物添加剂及其制备方法，目的在于根据水泥水化理论，对水泥水化过程和微结构形成与演化过程进行进准调控，开发全新的混凝土外加剂，通过以下步骤：1）醛基化改性纳米纤维素；2）制备纳米金属氧化物分散液；3）制备纳米晶胶聚合物，实现喷射混凝土早强、高强的技术要求。通过提高水泥矿物在水中的分散度，提升固液反应的接触面积，加快混凝土早期水化；通过引入纳米晶核，加快水泥水化产物的成核结晶，快速降低电解质溶液中的离子浓度，加速水化进程；醛基化纳米纤维素对水泥中的各个矿相实行定向吸附，实现矿相失活，加速C3A反应进程，实现整个水化过程的进准设计，实现混凝土的速凝和早强。
Nanocrystalline gel polymer additive for early-strength and high-strength sprayed concrete
The invention relates to an early-strength and high-strength sprayed concrete nanocrystalline gel polymer additive and a preparation method thereof, and aims to accurately regulate and control a cement hydration process and a microstructure formation and evolution process according to a cement hydration theory to develop a brand-new concrete admixture, and the preparation method comprises the following steps: 1) modifying nano cellulose through formylation; 2) preparing a nano metal oxide dispersion liquid; and (3) preparing a nanocrystalline gel polymer to realize the technical requirements of early strength and high strength of the sprayed concrete. By improving the dispersity of cement minerals in water, the contact area of solid-liquid reaction is increased, and early hydration of concrete is accelerated; by introducing the nano crystal nucleus, nucleation crystallization of cement hydration products is accelerated, the ion concentration in an electrolyte solution is rapidly reduced, and the hydration process is accelerated; the hydroformylated nanocellulose performs directional adsorption on each mineral phase in the cement, realizes mineral phase inactivation, accelerates the C3A reaction process, realizes accurate design of the whole hydration process, and realizes rapid hardening and early strength of the concrete.
本发明涉及一种早高强喷射混凝土纳米晶胶聚合物添加剂及其制备方法，目的在于根据水泥水化理论，对水泥水化过程和微结构形成与演化过程进行进准调控，开发全新的混凝土外加剂，通过以下步骤：1）醛基化改性纳米纤维素；2）制备纳米金属氧化物分散液；3）制备纳米晶胶聚合物，实现喷射混凝土早强、高强的技术要求。通过提高水泥矿物在水中的分散度，提升固液反应的接触面积，加快混凝土早期水化；通过引入纳米晶核，加快水泥水化产物的成核结晶，快速降低电解质溶液中的离子浓度，加速水化进程；醛基化纳米纤维素对水泥中的各个矿相实行定向吸附，实现矿相失活，加速C3A反应进程，实现整个水化过程的进准设计，实现混凝土的速凝和早强。
Nanocrystalline gel polymer additive for early-strength and high-strength sprayed concrete
一种早高强喷射混凝土纳米晶胶聚合物添加剂
LIU GUOQING (author) / LI GUOLIANG (author) / LI LEI (author) / DING GUOJIE (author) / FAN JIE (author) / HUANG SHUANGLIN (author) / JIN BAOCHENG (author) / LI NING (author) / DUO SHENGJUN (author) / SHI XIANWEI (author)
2023-03-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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