纤维素醚改性粉煤灰基薄喷材料性能研究  

Study on the properties of cellulose ether-modified fl yash-based thin spray materials

作　　者：王予 陈杰[1] 黄庆享[2] 武奇猛 刘纯 贺剑 WANG Yu;CHEN Jie;HUANG Qingxiang;WU Qimeng;LIU Chun;HE Jian(School of Materials,Xi'an University of Science and Technology,Xi'an 710054,China;School of Energy,Xi'an University of Science and Technology,Xi'an 710054,China;Construction Engineering Quality Inspection Center of Suzhou City,Suzhou 234000,China)

机构地区：[1]西安科技大学材料学院,西安710054 [2]西安科技大学能源学院,西安710054 [3]宿州市建设工程质量检测中心,安徽宿州234000

出　　处：《功能材料》2024年第10期10053-10058,10070,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(51674190);陕西省重点研发计划项目(2020SF-401)。

摘　　要：采用纤维素醚(羟乙基纤维素醚、羟丙基甲基纤维素醚)对粉煤灰基薄喷材料的粘结性能进行改性研究,研究了纤维素醚的黏度、取代基对粉煤灰基薄喷材料粘结强度、稠度及其抗拉强度、抗压强度的影响规律。采用扫描电子显微镜研究了纤维素醚掺入前后粉煤灰基薄喷材料28 d试样的微观结构,揭示了纤维素醚对薄喷材料粘结性能改性机理。结果表明,加入纤维素醚后,薄喷材料的粘结强度显著提高。相同取代基下,掺入低黏度的纤维素醚试样的粘结性能更高。不同取代基下,羟乙基纤维素醚试样粘结强度更高,对力学性能的不良影响更小。掺入0.05%(占胶凝材料质量分数)羟乙基纤维素醚的粉煤灰基薄喷材料28 d粘结强度达到1.67 MPa,抗压强度为11.4 MPa。Cellulose ether(hydroxyethyl cellulose ether,hydroxypropyl methyl cellulose ether)was used to modify the bonding properties of fly ash-based thin spray materials,and the effects of viscosity and substituent of cellulose ether on the bonding strength,consistency,and its tensile strength and compressive strength of the fly ash-based thin spray materials were studied,and the microstructure of the fly ash-based thin spray materials before and after the incorporation of cellulose ether into the 28 d specimens was studied by scanning electron microscopy.The results showed that the bond strength of the thin-sprayed materials was significantly improved after the addition of cellulose ether,with a maximum increase of 294.23%compared with that of the unadulterated cellulose ether group.Under the same substituent,the bonding performance of the cellulose ether samples with low viscosity was higher.Under different substituents,the bond strength of hydroxyethyl cellulose ether specimens was higher,and the adverse effect on mechanical properties was smaller.The 28 d bond strength of fly ash-based thin spray material incorporated with 0.05%(mass percentage of cementitious material)hydroxyethyl cellulose ether(HEC)reached 1.67 MPa,and the compressive strength was 11.4 MPa.

关 键 词：粉煤灰基薄喷材料 粘结强度 羟乙基纤维素醚 羟丙基甲基纤维素醚 

分 类 号：TD353[矿业工程—矿井建设]