【作者】 梁颜芳；

【导师】 王国和；

【作者基本信息】 苏州大学 ， 纺织材料与纺织品设计， 2008， 硕士

【摘要】 织物增强混凝土作为一种新型的水泥基复合材料,在国内外属于比较新的研究课题。机织物具有显著的优点——自重轻、不易腐蚀且具有良好的结构可设计性,用于混凝土的增强,可以显著地改善稳定性,抗裂、增强效果更佳。本文在国内外研究成果的基础上,主要以丙纶、涤纶织物为增强材料,分别以砂浆和混凝土为基体材料,对水泥基织物增强材料的力学性能进行一系列的研究,探讨织物对建筑墙(包括墙面、墙体)的抗裂、增强、增韧作用。本课题的工作主要有:1、以涤纶、丙纶纤维为原料研制纱罗织物,通过普通织机的改造研制二维、三维平面织物及三维立体织物等不同结构形态的织物,共研制了24种不同规格的织物。2、通过纱线拔出试验和三点弯曲试验研究涤纶、丙纶纤维与基体的界面粘结情况,并选择和优化纱罗织物定形用粘合剂。结果表明,涤纶、丙纶纤维与水泥基体的粘结强度良好,其中,粘合剂A的定形、粘结效果较好。3、以砂浆为基体,玻璃纤维、涤纶、丙纶纤维的纱罗织物为增强体,通过拉伸、弯曲试验研究复合材料的强韧性。试验表明,织物可以改善砂浆的抗裂性能,增大延性。其中,玻璃纤维织物对砂浆增加强度效果较好,涤纶、丙纶织物显著改善韧性。4、以混凝土为基体,不同结构形态的织物为增强体,通过测试劈拉强度、抗折强度研究复合材料的增强性能。试验表明,织物对混凝土具有增强、增韧作用,立体织物比平面织物的增强效果好。抗折强度方面,T字形织物较好,十字形其次,平面形织物较差;劈裂抗拉强度方面,十字形与T字形织物增强效果良好。更多还原

【Abstract】 The fabric reinforced concrete as a new-style of cement based composite is a new research problem abroad and at home. The advantages of fabric are based on the possibility of designing the composite characteristic and reducing weight while increasing the quality such as strength, toughness of the concrete and resisting corrosion. In this dissertation, the effect of fabric on the properties of anti-crack and obdurability is discussed by studying the mechanical performance of the composite of polyester (PET) and polypropylene (PP) fiber fabric reinforcement and mortar or concrete matrix.1. The leno of PET and PP fiber are manufactured. Different configuration or structure fabrics such as planar and three-dimensional fabric are woven on the conventional loom. 24 fabrics in all are manufactured.2. Interfacial bonding strength between PET and PP fiber with cement matrix is evaluated through yarn pull-out test and three-point-bending test. The adhesive for leno setting is selected and optimized as well. The results show that the fibers’bonding to matrix is fairly high, and the bonding effect of adhesive A is quite good.3. The obdurability of composite of mortar matrix and leno fabric reinforcement are studied with tension and bending test. The results indicate leno can improve the mortar property of anti-cracking evidently and enhance the ductility mainly. The composite reinforced with glass fiber leno fabric has high strength, while PET, PP high ductility.4. The reinforce properties such as splitting strength and flexural strength of the composite combining with different configuration fabrics as reinforcement and concrete as matrix are tested. Experiment shows fabric has increased the strength and toughness of the concrete, solid fabric is better than planar fabric. In terms of the flexural strength, the shape of“T”fabric is highest, the shape of“+”second, and planar fabric lowest. In terms of the splitting strength, the shape of“T”and“+”fabric are rather well.更多还原