玻璃纤维改性水泥混凝土砂浆的制备及其耐久性能的研究  

Preparation and durability of glass fiber modified cement concrete mortar

作　　者：程诣涵 蔡基伟 许鸽龙 CHENG Yihan;CAI Jiwei;XU Gelong(Department of Civil Engineering,Eurasia International School of Henan University,Kaifeng 475001,China;School of Civil and Architectural Engineering,Henan University,Kaifeng 475001,China)

机构地区：[1]河南大学欧亚国际学院土木工程系,河南开封475001 [2]河南大学土木建筑学院,河南开封450046

出　　处：《功能材料》2023年第9期9220-9225,共6页Journal of Functional Materials

基　　金：河南省自然科学基金项目(232300420291);河南省科学院科技开放合作项目(220609097)。

摘　　要：选择以玻璃纤维为添加相,天然河砂为细集料,将不同体积掺量(0.5%~2.0%)的玻璃纤维引入后制备了纤维改性水泥混凝土砂浆,研究了玻璃纤维掺杂量对水泥砂浆力学性能、抗裂性能和耐磨性能的影响。结果表明,随着玻璃纤维掺杂量的增加,砂浆拌合物的稠度逐渐增大,抗压强度和抗折强度先增大后降低,当玻璃纤维的掺杂量为1.5%(体积分数)时,砂浆的抗压强度和抗折强度达到最大值,分别为60.3和8.9 MPa;此时,贯穿性裂纹和表面起皮脱落现象减少,砂浆的轴心抗压强度、弹性模量、抗裂指数、挠度和应力均达到最大值,分别为47.6 MPa、29.2 GPa、99.6%、3.2 mm和17.3 kN,抗裂性能最佳。当玻璃纤维的掺杂量为1.5%(体积分数)时,砂浆的磨损量最低为0.83 kg/m^(2),磨损量降低百分比最大为62.44%,耐磨性能提升明显。综合可知,玻璃纤维的最佳掺杂量为1.5%(体积分数)。Fiber modified cement concrete mortar was prepared by selecting glass fiber as the additive phase and natural river sand as the fine aggregate,and introducing glass fiber with different volume additions(0.5%~2.0%).The effect of glass fiber doping on the mechanical properties,crack resistance and wear resistance of cement mortar was studied.The results show that as the amount of glass fiber doping increases,the consistency of the mortar mixture gradually increases,and the compressive strength and flexural strength first increase and then decrease.When the doping amount of glass fiber is 1.5vol%,the compressive strength and flexural strength of the mortar reach their maximum values,which are 60.3 and 8.9 MPa,respectively.At this point,the phenomenon of penetrating cracks and surface peeling decreases,and the axial compressive strength,elastic modulus,crack resistance index,deflection,and stress of the mortar reach their maximum values,which are 47.6 MPa,29.2 GPa,99.6%,3.2 mm and 17.3 kN,respectively,indicating the best crack resistance performance.When the doping amount of glass fiber is 1.5vol%,the minimum wear amount of mortar is 0.83 kg/m^(2),and the maximum reduction percentage of wear amount is 62.44%,indicating a significant improvement in wear resistance.Overall,the optimal doping amount for glass fibers is 1.5vol%.

关 键 词：玻璃纤维 砂浆 力学性能 抗裂性能 耐磨性能 

分 类 号：TU528.41[建筑科学—建筑技术科学]