玻璃微珠对OPC-SAC体系复合胶凝材料性能的影响及在3D打印中应用

通过在OPC-SAC体系和矿物掺合料组成的复合胶凝材料中掺入中空玻璃微珠,制备出了符合挤出式建筑3D打印要求的材料。实验结果表明,复合胶凝材料体系初凝时间为11~19 min,终凝时间为20~45 min;3 d抗压强度为50~70 MPa,3 d抗折强度为5~7 MPa,28 d抗压强度为60~90 MPa,28 d抗折强度为7~12 MPa;可满足建筑3D打印的可挤出性、可建造性和可连续性的要求。

Effect of Hollow Glass Beads(HGB) on the Performance of OPC-SAC Composite Cementitious Materials and Its Application in 3D Printing

The composite cementitious material composed of raw material as OPC-SAC system and mineral admixture is used to meet the requirements of 3D printing of extrusion building by adding the hollow glass beads(HGB). The results show that the initial setting time of the composite cementitious material is 11~19 min, the final setting time is 20~45 min,the compressive strength of 3d is 50~70 MPa, the flexural intensity of 3d is 5~7 MPa, the compressive strength of 28 d is60~90 MPa, and the flexural strength of 28 d is 7~12 MPa, which can meet the requirements of the extrusion, construction and continuity of 3D printing of buildings.