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磷酸镁砂浆及CFRP切丝改性试验研究

ISSN号：1002-3550
期刊名称：《混凝土》
时间：0
分类：TU528.01[建筑科学—建筑技术科学]
作者机构：[1]南京理工大学泰州科技学院,江苏泰州225300, [2]江苏大学土木工程与力学学院,江苏镇江212013, [3]泰州市同一建设工程质量检测有限公司,江苏泰州225300
相关基金：国家自然科学基金（51378241）;泰州市社会发展项目（SSF20150055）;江苏省创新创业训练计划项目（201413842007Y）;南京理工大学泰州科技学院创新创业训练计划项目（2015025）

作者：李十泉[1], 陈蓓[1,2], 吴丽雅, 陈妤[2], 蒋邵轩, 葛佳龙

关键词：磷酸镁水泥, 砂浆, CFRP切丝, 配合比, 养护龄期, 力学性能, magnesium phosphate cement, mortar, CFRP chopped strands , proportion, curing time, mechanical properties

中文摘要：

介绍了磷酸镁水泥（MPC）砂浆的制备;研究了镁磷比、砂率、养护龄期、CFRP切丝的掺加量及长度对MPC砂浆强度的影响。结果表明：MPC砂浆具有明显的早强高强特性;随CFRP切丝的添加率增加,试件抗折、抗压强度上升;CFRP切丝长度的影响较小;随龄期增加,试件的强度逐渐增加,且早期更明显。当M∶P∶B=187∶85∶5、W∶B=0.15、M∶P=2.2、S∶B=1.0时,砂浆试件达到P·O 52.5R级水泥强度要求;当M∶P∶B=187∶85∶5、M∶P=2.2、W∶B=0.19、Vc=15‰时,改性试件达到P·O 52.5R级水泥强度要求。

英文摘要：

The preparation of the magnesium phosphate cement （MPC） mortar was introduced.The effects of the factors, such as watercement ratio, magnesium phosphorus ratio, curing time, mixing amount and length of CFRP chopped strands, to the strength of MPC mortar were studied.MPC mortar has early strength and high strength properties.With the increased usage amount of CFRP strips, the bending, compressive strength of the specimen increased.The effect of CFRP chopped strands length is not obvious.With the curing time increases, the strength of specimens increase gradually, which is significantly in early days.When M：P：B is 187：85：5, W：B is 0.15, M：P is 2.2, S：B is 1.0,the strength of mortar specimen is equivalent the 52.5R Portland cement.When M：P：B is 187：85：5 ,M：P is 2.2 ,W：B is 0.19, Vc is 15%o, the strength of modified specimen is equivalent the 52.5R Portland cement.