玄武岩纤维对3D打印水泥基材料可打印性的影响  

Influence of basalt fiber on the printability of 3D printing cement-based materials

作　　者：赵宇[1,3] 武喜凯 朱伶俐[2] 杨章 王有凯[1] ZHAO Yu;WU Xikai;ZHU Lingli;YANG Zhang;WANG Youkai(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China;School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;State and Local Joint Engineering Laboratory for Gas Drainage&Ground Control of Deep Mines,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学土木工程学院,焦作454003 [2]河南理工大学材料科学与工程学院,焦作454003 [3]河南理工大学深井瓦斯抽采与围岩控制技术国家地方联合工程实验室,焦作454003

出　　处：《复合材料学报》2022年第11期5537-5547,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(U1504513,U1905216);深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放基金(SJF202006);河南省高等学校重点科研项目(22A560002)。

摘　　要：玄武岩纤维是一种具备良好力学性能、优异耐腐蚀性且高性价比的纤维材料,将其掺入3D打印水泥基材料中可以起到抑制塑性收缩开裂的作用。而玄武岩纤维的掺入会显著改变3D打印水泥基材料的流变性能,从而对3D打印水泥基材料可挤出性及可建造性产生影响。通过改变纤维的掺量、直径及长度,研究了玄武岩纤维特性对3D打印水泥基材料流变性能、可挤出性及可建造性的影响,明确了流变性能与可挤出性和可建造性之间的关系。研究结果表明,玄武岩纤维的掺量对3D打印水泥基材料流变性能参数的影响权重最大,其次是直径。动态屈服应力与单位时间挤出量呈负相关,静态屈服应力与打印试件倾角呈正相关。打印试件横截面积比受动态屈服应力和静态屈服应力等综合因素影响。综合来看,优良的可挤出性需要适中的动态屈服应力,约为280 Pa。而优良的可建造性不仅需要适中的动态屈服应力,还需要静态屈服应力大于950 Pa。Basalt fiber is a fiber material with good mechanical properties,excellent corrosion resistance and high cost performance.Incorporating it into 3D printing cement-based materials can inhibit plastic shrinkage and cracking.The addition of basalt fiber will significantly change the rheological properties of 3D printing cementbased materials,which will affect the extrudability and buildability of 3D printing cement-based materials.This article aimed to clarify the influence of basalt fiber on the printability of 3D printing cement-based materials.By changing the fiber content,diameter and length,the effects of basalt fiber properties on the rheological properties,extrudability and buildability of 3D printing cement-based materials were studied.The relationship between rheological properties and extrudability and buildability was clarified.The results show that the amount of basalt fiber has the largest influence on the rheological parameters of 3D printing cement-based materials,followed by the diameter.The dynamic yield stress is negatively correlated with the amount of extrusion per unit time.The static yield stress is positively correlated with the inclination angle of the printed specimen.The cross-sectional area ratio of the printed specimen is affected by comprehensive factors such as dynamic yield stress and static yield stress.Taken together,good extrudability requires moderate dynamic yield stress,about 280 Pa.Excellent buildability requires not only a moderate dynamic yield stress,but also the static yield stress greater than 950 Pa.

关 键 词：3D打印水泥基材料 玄武岩纤维 流变特性 可打印性 可挤出性 可建造性 

分 类 号：TU528[建筑科学—建筑技术科学]