3D printing concrete needs to meet the requirements of pumpability,extrudability and constructability at the same time,among which the comprehensive evaluation of the pumpability and constructability of concrete mixture is particularly important.It is important to evaluate the printing performance of materials by coupling them.Thixotropic parameters characterized by flow slump ratio and consistency slump ratio are proposed to evaluate the printing performance of materials under the coupling of pumping and construction.Taking hydroxypropyl methyl cellulose ether(HPMC-6),redispersible latex powder(RLP)and magnesium aluminum silicate(TL)as the research objects,based on the orthogonal test,the influence of the three additives on the thixotropic parameters of 3D printing concrete was studied.The research shows that the thixotropy parameters proposed can be used to quantitatively evaluate the pumping ability and constructability of 3D printing concrete.The influence of three additives on thixotropy parameters is HPMC-6>RLP/TL,and the addition of three additives will lead to the decrease of thixotropy parameters of materials.
关键词
3D打印混凝土/打印性能/泵送性/建造性/外加剂/评价
Key words
3D printing concrete/printing performance/pumpability/constructability/admixture/evaluate
维普
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