Considering the long-term development of digital construction, a cost-effective and environmental printing material was designed with blast furnace slag as main cementitious material and sodium desulfurization ash as activator. However, weak alkaline environment lead to the insufficient 3D printability (e.g. yield stress, viscosity). Ethylene/vinyl acetate copolymer (EVA) was used to make up this defect, and it was found that there was a synergistic effect between EVA and sodium desulfurization ash (NS), which is beneficial to the improvement of the printing performance. The synergistic effect of EVA and NS was investigated in terms of fresh, hardened and microstructure properties. Experimental results show that under varying resting times and shear rates, the addition of 0.6−1.6% (i.e.by mass of binder) EVA could increase the yield stress and apparent viscosity of HVGS. Moreover, it was also found that the addition of EVA could help improve the polymerization degree of printing materials and increase the compressive strength of 28d by about 22%. To verify the practical value of the printing material, an industrial product was printed, and the maximum number of continuous printing layers can be up to 30 layers.

考虑到数字化建设的长远发展，以高炉矿渣为主要胶凝材料，以脱硫钠灰为活化剂，设计了一种高性价比、环保的印刷材料。然而，弱碱性环境导致 3D 可打印性不足（例如屈服应力、粘度）。乙烯/醋酸乙烯共聚物（EVA）被用来弥补这一缺陷，发现EVA与钠脱硫灰（NS）之间存在协同作用，有利于印刷性能的提高。EVA 和 NS 在新鲜、硬化和微观结构方面的协同作用被研究。实验结果表明，在不同的静息时间和剪切速率下，添加 0.6-1.6%（即 按粘合剂质量计）EVA 可以增加 HVGS 的屈服应力和表观粘度。此外，还发现EVA的加入有助于提高印刷材料的聚合度，使28d的抗压强度提高约22%。为了验证打印材料的实用价值，打印了一个工业产品，最大连续打印层数可达30层。