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渗浆法钢纤维增强磷酸镁水泥基复合材料的力学性能
作者:李振1 秦继辉1 尤超2 岳燕飞1 贾兴文1 3 钱觉时1 
单位:(1. 重庆大学材料科学与工程学院 重庆400045 2. 贵州磷镁材料有限公司 贵阳 550023 3. 重庆大学土木工程学院 重庆 400045) 
关键词:磷酸镁水泥 钢纤维增强 渗浆 力学性能 
分类号:
出版年,卷(期):页码:2019,47(11):0-0
DOI:
摘要:

 采用磷酸镁水泥(MPC)制备渗浆钢纤维增强材料(SIFCC),并与普通硅酸盐水泥(OPC)基体进行比较,研究钢纤维掺量对SIFCC抗压强度、抗弯强度、弯曲应力应变曲线和断裂韧性的影响,根据单根钢纤维拔出试验和断裂面微观形貌,分析MPC-SIFCC的增强机制。结果显示:MPC制备的SIFCC抗弯强度和断裂韧性提高显著,抗压强度在纤维掺量6%以上时提高明显;与同强度等级的OPC-SIFCC(28d)相比,MPC-SIFCC抗弯强度及断裂韧性提高幅度更大,钢纤维掺量10%的7 d抗弯强度可达77.4 MPa。单根纤维拔出试验与微观形貌观察结果显示,与OPC相比,MPC与钢纤维有更高的黏结力。考虑MPC浆体在低水胶比下的良好流动性,可以认为MPC用于制备SIFCC具有较为明显的优势。

基金项目:
国家自然科学基金项目(51572039);国家自然科学基金国际合作项目(51461135003)
作者简介:
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