Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sprayed concrete and construction method thereof
The invention relates to the technical field of building construction, and particularly discloses sprayed concrete and a construction method thereof. A mixture of the sprayed concrete comprises the following components: Portland cement, fine aggregate, coarse aggregate, an accelerator, steel fibers and a premix, the premix is obtained by mixing diatomite, cyclodextrin, a polycarboxylate superplasticizer and modified bentonite, grinding and sieving, and the modified bentonite is obtained by drying a mixture of bentonite and a modification liquid to constant weight. The components of the modified liquid comprise polyethylene glycol and water, and the total amount of the polyethylene glycol in the modified liquid is 70-90% of the weight of the bentonite. The modified bentonite is prepared through adsorption between the polyethylene glycol and the bentonite, adsorption of the bentonite to the polycarboxylic acid water reducing agent is reduced, the total amount of the polycarboxylic acid water reducing agent actually playing a water reducing role in a concrete mixture is increased, the flowability of the concrete mixture is improved, and the water reducing effect of the concrete mixture is improved. And the construction performance of a sprayed concrete mixture can be improved.
本申请涉及建筑施工技术领域，具体公开了一种喷射混凝土及其施工方法。喷射混凝土的拌和物包括如下组分：硅酸盐水泥、细骨料、粗骨料、速凝剂、钢纤维和预混料，预混料由硅藻土、环糊精、聚羧酸减水剂和改性膨润土混合并研磨过筛后得到，改性膨润土由膨润土和改性液的混合物干燥至恒重之后得到,改性液的组分包括聚乙二醇和水，改性液中的聚乙二醇总量为膨润土重量的70‑90%。本申请通过聚乙二醇与膨润土之间的吸附制备了改性膨润土，减少了膨润土对聚羧酸减水剂造成吸附，增加了混凝土拌和物中实际发挥减水作用的聚羧酸减水剂的总量，提高了混凝土拌和物的流动性，有助于改善喷射混凝土拌和物的施工性能。
Sprayed concrete and construction method thereof
The invention relates to the technical field of building construction, and particularly discloses sprayed concrete and a construction method thereof. A mixture of the sprayed concrete comprises the following components: Portland cement, fine aggregate, coarse aggregate, an accelerator, steel fibers and a premix, the premix is obtained by mixing diatomite, cyclodextrin, a polycarboxylate superplasticizer and modified bentonite, grinding and sieving, and the modified bentonite is obtained by drying a mixture of bentonite and a modification liquid to constant weight. The components of the modified liquid comprise polyethylene glycol and water, and the total amount of the polyethylene glycol in the modified liquid is 70-90% of the weight of the bentonite. The modified bentonite is prepared through adsorption between the polyethylene glycol and the bentonite, adsorption of the bentonite to the polycarboxylic acid water reducing agent is reduced, the total amount of the polycarboxylic acid water reducing agent actually playing a water reducing role in a concrete mixture is increased, the flowability of the concrete mixture is improved, and the water reducing effect of the concrete mixture is improved. And the construction performance of a sprayed concrete mixture can be improved.
本申请涉及建筑施工技术领域，具体公开了一种喷射混凝土及其施工方法。喷射混凝土的拌和物包括如下组分：硅酸盐水泥、细骨料、粗骨料、速凝剂、钢纤维和预混料，预混料由硅藻土、环糊精、聚羧酸减水剂和改性膨润土混合并研磨过筛后得到，改性膨润土由膨润土和改性液的混合物干燥至恒重之后得到,改性液的组分包括聚乙二醇和水，改性液中的聚乙二醇总量为膨润土重量的70‑90%。本申请通过聚乙二醇与膨润土之间的吸附制备了改性膨润土，减少了膨润土对聚羧酸减水剂造成吸附，增加了混凝土拌和物中实际发挥减水作用的聚羧酸减水剂的总量，提高了混凝土拌和物的流动性，有助于改善喷射混凝土拌和物的施工性能。
Sprayed concrete and construction method thereof
喷射混凝土及其施工方法
ZHONG XIAODONG (Autor:in)
20.10.2023
Patent
Elektronische Ressource
Chinesisch
Regenerated sprayed concrete support construction method
| Europäisches Patentamt | 2022
Sprayed concrete for bridge construction
| British Library Conference Proceedings | 1996