Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mass concrete construction method
The invention discloses a mass concrete construction method, which comprises the following steps: S1, preparation of a concrete mixture: mixing and stirring cement, fly ash, mineral powder, broken stone, sand, water and a retarding admixture to obtain the concrete mixture; s2, pouring, wherein gradient layered continuous pouring is adopted; the outer formwork is installed, and the inner formwork and the concrete alternately ascend layer by layer to continuously pour the concrete mixture; s3, coagulation and maintenance; the coagulation time of the delayed coagulation type admixture added to each layer in the layered continuous casting is gradually increased from 8 h to 12 h. On one hand, the gradient layered continuous pouring method is adopted, the temperature peak value in the large-size structure is reduced, the cracking risk is reduced, and the construction efficiency is improved; on the other hand, continuous pouring of all layers of concrete is achieved, cold joints are avoided, the cracking risk is reduced, and the engineering quality is guaranteed.
本发明公开了一种大体积混凝土施工方法，其包括如下步骤：S1、混凝土拌合物的制备：将水泥、粉煤灰、矿粉、碎石、砂子、水和缓凝型外加剂混合搅拌，即得混凝土拌合物；S2、浇筑：采用梯度性分层连续浇筑；安装外模板，内模板与混凝土逐层交替上升连续浇筑混凝土拌合物；S3、凝结和养护；所述分层连续浇筑中每层加入的缓凝型外加剂的凝结时间从8h至12h逐渐增大。本发明一方面采用梯度性分层连续浇筑的方法，既降低大体积结构内部温度峰值，减小开裂风险，又提高了施工效率；另一方面实现各层混凝土连续浇筑，不出现冷缝，降低开裂风险，保障工程质量。
Mass concrete construction method
The invention discloses a mass concrete construction method, which comprises the following steps: S1, preparation of a concrete mixture: mixing and stirring cement, fly ash, mineral powder, broken stone, sand, water and a retarding admixture to obtain the concrete mixture; s2, pouring, wherein gradient layered continuous pouring is adopted; the outer formwork is installed, and the inner formwork and the concrete alternately ascend layer by layer to continuously pour the concrete mixture; s3, coagulation and maintenance; the coagulation time of the delayed coagulation type admixture added to each layer in the layered continuous casting is gradually increased from 8 h to 12 h. On one hand, the gradient layered continuous pouring method is adopted, the temperature peak value in the large-size structure is reduced, the cracking risk is reduced, and the construction efficiency is improved; on the other hand, continuous pouring of all layers of concrete is achieved, cold joints are avoided, the cracking risk is reduced, and the engineering quality is guaranteed.
本发明公开了一种大体积混凝土施工方法，其包括如下步骤：S1、混凝土拌合物的制备：将水泥、粉煤灰、矿粉、碎石、砂子、水和缓凝型外加剂混合搅拌，即得混凝土拌合物；S2、浇筑：采用梯度性分层连续浇筑；安装外模板，内模板与混凝土逐层交替上升连续浇筑混凝土拌合物；S3、凝结和养护；所述分层连续浇筑中每层加入的缓凝型外加剂的凝结时间从8h至12h逐渐增大。本发明一方面采用梯度性分层连续浇筑的方法，既降低大体积结构内部温度峰值，减小开裂风险，又提高了施工效率；另一方面实现各层混凝土连续浇筑，不出现冷缝，降低开裂风险，保障工程质量。
Mass concrete construction method
一种大体积混凝土施工方法
LI MENGQIANG (Autor:in) / WANG JUN (Autor:in) / JIANG ZHEN (Autor:in) / HUANG HUI (Autor:in) / LIU SIYU (Autor:in)
20.01.2023
Patent
Elektronische Ressource
Chinesisch