3D printing concrete material as well as preparation method and application thereof

Abstract

The invention provides a 3D printing concrete material as well as a preparation method and application thereof. The preparation method comprises the following steps: providing cement-based printing slurry; and providing carbonation gas containing carbon dioxide, introducing the carbonation gas, and carrying out carbonization treatment on the cement-based printing slurry, so that minerals in the cement-based printing slurry react with carbon dioxide in the carbonation gas to generate carbonate, and the 3D printing concrete material is obtained. Compared with cement-based printing slurry before carbonization, the carbonized 3D printing concrete material has the advantages that the fluidity is reduced, the setting time is shortened, and the strength after extrusion is improved, so that the constructability of the 3D printing concrete is greatly improved. 本申请提供了3D打印混凝土材料及其制备方法与应用，制备方法包括以下步骤：提供水泥基打印浆料；提供含有二氧化碳的碳化气体，通入碳化气体，将水泥基打印浆料进行碳化处理，使水泥基打印浆料中的矿物与碳化气体中的二氧化碳发生反应，生成碳酸盐，得到3D打印混凝土材料。相比碳化前的水泥基打印浆料，碳化后的3D打印混凝土材料流动性降低，凝结时间缩短，挤出后的强度提高，从而大大提高了3D打印混凝土的可建造性。