Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Secondary lining concrete suitable for high-temperature and low-humidity environment of high-ground-temperature tunnel, and preparation method thereof
The invention discloses a secondary lining concrete suitable for a high-temperature and low-humidity environment of a high-ground-temperature tunnel, and a preparation method thereof. The secondary lining concrete comprises a cementing material component, a modification component and a gravel component, wherein the cementing material comprises cement and fly ash, the modification component comprises hydroxypropyl methyl cellulose ether, sodium polyacrylate super absorbent resin, redispersible latex powder, an air entraining agent and a high-performance polycarboxylic acid type water reducing agent, and the gravel component comprises sand and gravel. By adjusting and optimizing material composition and parameters, the performance of the concrete is improved, the pore structure is refined, the internal structure is more compact, a film curing system is adopted, rapid evaporation of early-stage moisture in the concrete in a high-temperature and low-humidity environment can be effectively reduced, further proceeding of a hydration reaction is facilitated, the mechanical strength and durability are improved, adverse effects caused by high ground temperature are reduced, safety and stability of the tunnel lining structure are guaranteed, and the service life is prolonged.
本发明公开了一种适用于高地温隧道高温低湿环境下二次衬砌混凝土及其制备方法，包括胶凝材料组份、改性组份和砂石组分，其中胶凝材料组份包括水泥和粉煤灰，改性组份包括羟丙基甲基纤维素醚、聚丙烯酸钠高吸水树脂、可再分散乳胶粉、引气剂和高性能聚羧酸型减水剂，砂石组分包括砂和碎石。本发明通过调整与优化材料组成及参数改善混凝土性能，细化孔隙结构，使得内部结构更加密实，并采用覆膜养护制度，可有效减少高温低湿环境下混凝土内前期水分的快速蒸发，有利于水化反应的进一步进行，提高力学强度与耐久性能，降低高地温带来的不利影响，保证隧道衬砌结构安全稳定，延长使用寿命。
Secondary lining concrete suitable for high-temperature and low-humidity environment of high-ground-temperature tunnel, and preparation method thereof
The invention discloses a secondary lining concrete suitable for a high-temperature and low-humidity environment of a high-ground-temperature tunnel, and a preparation method thereof. The secondary lining concrete comprises a cementing material component, a modification component and a gravel component, wherein the cementing material comprises cement and fly ash, the modification component comprises hydroxypropyl methyl cellulose ether, sodium polyacrylate super absorbent resin, redispersible latex powder, an air entraining agent and a high-performance polycarboxylic acid type water reducing agent, and the gravel component comprises sand and gravel. By adjusting and optimizing material composition and parameters, the performance of the concrete is improved, the pore structure is refined, the internal structure is more compact, a film curing system is adopted, rapid evaporation of early-stage moisture in the concrete in a high-temperature and low-humidity environment can be effectively reduced, further proceeding of a hydration reaction is facilitated, the mechanical strength and durability are improved, adverse effects caused by high ground temperature are reduced, safety and stability of the tunnel lining structure are guaranteed, and the service life is prolonged.
本发明公开了一种适用于高地温隧道高温低湿环境下二次衬砌混凝土及其制备方法，包括胶凝材料组份、改性组份和砂石组分，其中胶凝材料组份包括水泥和粉煤灰，改性组份包括羟丙基甲基纤维素醚、聚丙烯酸钠高吸水树脂、可再分散乳胶粉、引气剂和高性能聚羧酸型减水剂，砂石组分包括砂和碎石。本发明通过调整与优化材料组成及参数改善混凝土性能，细化孔隙结构，使得内部结构更加密实，并采用覆膜养护制度，可有效减少高温低湿环境下混凝土内前期水分的快速蒸发，有利于水化反应的进一步进行，提高力学强度与耐久性能，降低高地温带来的不利影响，保证隧道衬砌结构安全稳定，延长使用寿命。
Secondary lining concrete suitable for high-temperature and low-humidity environment of high-ground-temperature tunnel, and preparation method thereof
一种适用于高地温隧道高温低湿环境下二次衬砌混凝土及其制备方法
SHEN JINGTAO (Autor:in) / MA KUNLIN (Autor:in) / HAN XIAOKUN (Autor:in) / XU ZHANJUN (Autor:in) / ZHANG WEIZHEN (Autor:in) / LONG GUANGCHENG (Autor:in) / ZENG XIAOHUI (Autor:in) / HU MINGWEN (Autor:in)
25.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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