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A platform for research: civil engineering, architecture and urbanism
High-performance underwater non-dispersible concrete for back filling of tunnel lining wall and preparation method of high-performance underwater non-dispersible concrete
The invention discloses high-performance underwater non-dispersible concrete for filling behind a tunnel lining wall and a preparation method of the high-performance underwater non-dispersible concrete. The high-performance underwater non-dispersible concrete comprises 895-980 parts of a base material, the composite admixture is 36.8 to 74.9 parts by weight; 300 to 400 parts of water; wherein the base material is prepared from the following components in parts by weight: 120 to 180 parts of ordinary Portland cement, 100 to 150 parts of mineral powder, 70 to 110 parts of fly ash, 60 to 90 parts of crop straw ash, 280 to 380 parts of construction waste recycled aggregate and 140 to 200 parts of machine-made sand; the composite admixture is composed of the following components in parts by weight: 0.5-4 parts of modified cellulose ether, 1-10 parts of instant sodium silicate, 25-80 parts of sunflower stalk ash and 1-3 parts of a polycarboxylate superplasticizer. The material has the characteristics of good water dispersion resistance, short setting time and excellent mechanical property, is beneficial to improving the underwater retention rate of the material and the overall mechanical property and impermeability of a tunnel, and has important practical significance for controlling the displacement of duct pieces, improving the backfill effect and ensuring the construction safety.
本发明公开了一种用于隧道衬砌壁后充填的高性能水下不分散混凝土及其制备方法，包括基体材料895‑980份；上述复合外加剂36.8‑74.9份；水300‑400份；其中，所述基体材料，由如下重量份的组分组成：普通硅酸盐水泥120‑180份，矿粉100‑150份，粉煤灰70‑110份，农作物秸秆灰60‑90份，建筑垃圾再生骨料280‑380份，机制砂140‑200份；所述复合外加剂，由如下重量份的组分组成：改性纤维素醚0.5‑4份、速溶硅酸钠1‑10份、向日葵秆灰25‑80份和聚羧酸减水剂1‑3份。该材料具有抗水分散能力好、凝结时间短、力学性能优异的特性，有利于提高材料水下留存率与隧道整体力学性能及抗渗性，对于控制管片位移、提高壁后充填效果与保证施工安全具有重要的现实意义。
High-performance underwater non-dispersible concrete for back filling of tunnel lining wall and preparation method of high-performance underwater non-dispersible concrete
The invention discloses high-performance underwater non-dispersible concrete for filling behind a tunnel lining wall and a preparation method of the high-performance underwater non-dispersible concrete. The high-performance underwater non-dispersible concrete comprises 895-980 parts of a base material, the composite admixture is 36.8 to 74.9 parts by weight; 300 to 400 parts of water; wherein the base material is prepared from the following components in parts by weight: 120 to 180 parts of ordinary Portland cement, 100 to 150 parts of mineral powder, 70 to 110 parts of fly ash, 60 to 90 parts of crop straw ash, 280 to 380 parts of construction waste recycled aggregate and 140 to 200 parts of machine-made sand; the composite admixture is composed of the following components in parts by weight: 0.5-4 parts of modified cellulose ether, 1-10 parts of instant sodium silicate, 25-80 parts of sunflower stalk ash and 1-3 parts of a polycarboxylate superplasticizer. The material has the characteristics of good water dispersion resistance, short setting time and excellent mechanical property, is beneficial to improving the underwater retention rate of the material and the overall mechanical property and impermeability of a tunnel, and has important practical significance for controlling the displacement of duct pieces, improving the backfill effect and ensuring the construction safety.
本发明公开了一种用于隧道衬砌壁后充填的高性能水下不分散混凝土及其制备方法，包括基体材料895‑980份；上述复合外加剂36.8‑74.9份；水300‑400份；其中，所述基体材料，由如下重量份的组分组成：普通硅酸盐水泥120‑180份，矿粉100‑150份，粉煤灰70‑110份，农作物秸秆灰60‑90份，建筑垃圾再生骨料280‑380份，机制砂140‑200份；所述复合外加剂，由如下重量份的组分组成：改性纤维素醚0.5‑4份、速溶硅酸钠1‑10份、向日葵秆灰25‑80份和聚羧酸减水剂1‑3份。该材料具有抗水分散能力好、凝结时间短、力学性能优异的特性，有利于提高材料水下留存率与隧道整体力学性能及抗渗性，对于控制管片位移、提高壁后充填效果与保证施工安全具有重要的现实意义。
High-performance underwater non-dispersible concrete for back filling of tunnel lining wall and preparation method of high-performance underwater non-dispersible concrete
用于隧道衬砌壁后充填的高性能水下不分散混凝土及其制备方法
LIU RENTAI (author) / ZHU ZHIJING (author) / LI XIUHAO (author) / LI SHUCAI (author) / LI LIN (author) / SHAO CHANGZHI (author) / CHEN MENGJUN (author) / BAI JIWEN (author) / WANG ZHIHENG (author) / YAN JIA (author)
2023-03-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Non-Dispersible Underwater Concrete
| Springer Verlag | 2017
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