Appraisal of Hybrid Fiber Reinforced Engineered Cementitious Composite

Proceedings of the 4th International Conference on Civil, Structural and Transportation Engineering (ICCSTE'19) Pub Date : 2019-06-01 DOI:10.11159/ICCSTE19.192

Maninder Singh, B. Saini, H. D. Chalak

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引用次数: 13

Abstract

Mortar based engineered cementitious composite (ECC) demonstrate strain hardening behaviour with multiple micro-cracks under tension. The distinctive behaviour of ECC, makes it ductile as compared to brittle nature of conventional concrete. Ductile nature of ECC, makes it applicable in seismic resistant, repairing and retrofitting areas and blast resistant structural elements. In the present investigation, two types of polymer fibers (i.e. polyester (PET) fiber and polyvinyl alcohol (PVA) fiber) have been used in hybridization with different percentages (2+0), (2+0.5), (1.75+0.5), (1.5+0.5) for making ECC. Also fly ash, 55% of the total cementitious material, has been used for making sustainable concrete. The compressive, flexural and tensile tests were performed to evaluate the mechanical behaviour of hybrid fiber reinforced cementitious matrix. The test results revealed that PET fiber and PVA fiber in combination enhanced the strength properties of ECC by bridging effect of hybrid fibers.

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混杂纤维增强工程胶凝复合材料的评价

砂浆基工程胶凝复合材料(ECC)在拉伸作用下表现出多种微裂纹的应变硬化行为。与传统混凝土的脆性相比，ECC的独特性能使其具有延展性。ECC的延展性使其适用于抗震、修补和改造领域以及防爆结构元件。在本研究中，用不同比例(2+0)、(2+0.5)、(1.75+0.5)、(1.5+0.5)杂交两种聚合物纤维(聚酯(PET)纤维和聚乙烯醇(PVA)纤维制备ECC。此外，占总胶凝材料55%的粉煤灰已被用于制造可持续混凝土。通过压缩、弯曲和拉伸试验对混杂纤维增强胶凝基质的力学性能进行了评价。试验结果表明，PET纤维与PVA纤维复合可通过混杂纤维的桥接效应增强ECC的强度性能。

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Proceedings of the 4th International Conference on Civil, Structural and Transportation Engineering (ICCSTE'19)

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