A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Subway station concrete crack control method
The invention discloses a subway station concrete crack control method which is characterized by comprising the following steps: step 1, concrete mix proportion optimization: the suggested mixing amount of fly ash is 15%-20%, the mixing amount of mineral powder is 0%-15%, the mixing amount of an anti-cracking agent is 8%, and the total amount of the fly ash, the mineral powder and an anti-cracking and anti-seepage material is 25%-35%; the concrete construction performance requirements of different structural parts are as follows: the concrete slump of a bottom plate and a top plate is 140-180mm, the concrete slump of a side wall is 160-200mm, and the gradual loss of 1h slump is less than or equal to 20mm. Through the technical means such as mix proportion optimization design and adjustment, construction pouring measure adjustment, heat preservation and moisture preservation maintenance control, strain and temperature monitoring and the like, the inner-surface temperature difference and the inner-outer temperature difference of the concrete are reduced, then early-stage temperature shrinkage and middle-later-stage dry shrinkage of the concrete are reduced, and then the anti-cracking and anti-seepage effects of the side wall are improved.
本发明公开了一种地铁车站混凝土裂缝控制方法，其特征在于，该控制方法包括如下步骤：步骤一：混凝土配合比优化：粉煤灰建议掺量为15％‑20％，矿粉掺量为0％‑15％，抗裂剂掺量为8％，粉煤灰、矿粉和抗裂防渗材料总量在25％‑35％；不同结构部位混凝土施工性能要求：底板、顶板混凝土坍落度140‑180mm，侧墙为160‑200mm，1h坍落度的经时损失≤20mm。本发明通过配合比优化设计与调整、施工浇筑措施调整、保温保湿养护控制、应变及温度监控等技术手段，以降低混凝土里表温差、内外温差，进而降低混凝土早期温度收缩和中后期干缩，进而提高侧墙防裂抗渗的效果。
Subway station concrete crack control method
The invention discloses a subway station concrete crack control method which is characterized by comprising the following steps: step 1, concrete mix proportion optimization: the suggested mixing amount of fly ash is 15%-20%, the mixing amount of mineral powder is 0%-15%, the mixing amount of an anti-cracking agent is 8%, and the total amount of the fly ash, the mineral powder and an anti-cracking and anti-seepage material is 25%-35%; the concrete construction performance requirements of different structural parts are as follows: the concrete slump of a bottom plate and a top plate is 140-180mm, the concrete slump of a side wall is 160-200mm, and the gradual loss of 1h slump is less than or equal to 20mm. Through the technical means such as mix proportion optimization design and adjustment, construction pouring measure adjustment, heat preservation and moisture preservation maintenance control, strain and temperature monitoring and the like, the inner-surface temperature difference and the inner-outer temperature difference of the concrete are reduced, then early-stage temperature shrinkage and middle-later-stage dry shrinkage of the concrete are reduced, and then the anti-cracking and anti-seepage effects of the side wall are improved.
本发明公开了一种地铁车站混凝土裂缝控制方法，其特征在于，该控制方法包括如下步骤：步骤一：混凝土配合比优化：粉煤灰建议掺量为15％‑20％，矿粉掺量为0％‑15％，抗裂剂掺量为8％，粉煤灰、矿粉和抗裂防渗材料总量在25％‑35％；不同结构部位混凝土施工性能要求：底板、顶板混凝土坍落度140‑180mm，侧墙为160‑200mm，1h坍落度的经时损失≤20mm。本发明通过配合比优化设计与调整、施工浇筑措施调整、保温保湿养护控制、应变及温度监控等技术手段，以降低混凝土里表温差、内外温差，进而降低混凝土早期温度收缩和中后期干缩，进而提高侧墙防裂抗渗的效果。
Subway station concrete crack control method
一种地铁车站混凝土裂缝控制方法
HUI HAIPENG (author) / ZHANG SIJUN (author) / SHANG BING (author) / LI FEICHEN (author) / WANG XIAOLU (author) / GUO WENXUE (author) / CAO CHONG (author) / PENG XIANG (author)
2022-04-12
Patent
Electronic Resource
Chinese
| European Patent Office | 2024