3D printed concrete based on high active powder material of solid waste source
The 3D printing material of concrete was prepared by using high activity powder of solid waste source,P·O 42.5 cement as-sisted quartz sand aggregate,slow setting polycarboxylic acid water-reducing agent,cellulose ether,dispersible latex powder and other auxiliary materials.Setting time,fluidity and compressive strength of 3D printed materials were used as evaluation basis to analyze the in-fluence of each component on material properties,and the optimal ratio was determined by range analysis.The 1 d hydration products of 3D printed materials were characterized by SEM.The optimized 3D printing material was prepared with setting time of 85 min,initial mortar flu-idity of 190 mm,30 min mortar fluidity of 180 mm,1 d compressive strength of 28.8 MPa,3 d compressive strength of 49.6 MPa,28 d compressive strength of 70.2 MPa.The material properties of the prepared material meet the construction requirements of concrete 3D printing system and can ensure that the printing material still has good printability for about 30 min.The cost of the 3D printing material is about from 363.6 yuan/t to 437 yuan/t.
concrete 3D printinghigh activity powder material of solid waste sourceorthogonal testmaterial propertiescost analysis
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