速凝 3D 打印水泥基材料的制备.

In this paper, two series of quick-setting 3D printing cement-based materials were prepared with fast hard sulphoaluminate cement and ordinary Portland cement as basic cementing materials, supplemented by water reducing agent, coagulant and volume stabilizer, etc., in order to achieve rapid printing. The experimental results show that the prepared quick-setting 3D printing cement-based material could control the setting time within 5-20 min. The printed specimen had good construction performance with the over all deformation less than 5% and the lowest deformation less than10%. The printed specimen had early and late strength, and the simulated print sample strength loss rate did not exceed 15%, meeting the requirements of architectural 3D printing materials for work performance and mechanical properties. [ABSTRACT FROM AUTHOR]