Dependency of Sisal and Banana Fiber on Mechanical and Durability Properties of Polypropylene Hybrid Fiber Reinforced Concrete

ABSTRACT

In this investigation, the Hybrid Fiber Concrete (HFC) was fabricated using polypropylene fiber (PP), sisal fiber (SF) and banana fiber (BF) and the mechanical and durability properties of the prepared concrete was investigated. Mix design of M30 grade concrete was prepared according the standard procedure given by American Concrete Institute. Nine different proportions of concrete specimens were fabricated and the various experimental investigations like compressive, split tensile, flexural, and durability tests were conducted on the HFC. Compressive, split tensile, and flexural test results showed that the M3 specimen (PP: SF: 1.5:0.5) displayed the maximum compressive, split tensile and flexural strength compared to that of conventional concrete (CC). Compressive strength of M3 showed 24.3% and 14.9% improvement compared to the compressive strength of CC at 7 days and 28 days curing, respectively. The split tensile test showed that the split tensile strength value of M3 was improved by 47.54% and 37.19% compared to that of CC at 7 days and 28 days curing, respectively. Flexural test revealed that the M3 specimen exhibited the maximum flexural strength of 5.58 N/mm² and 10.9 N/mm² after 7 days and 28 days curing. Further, the durability test resulted that the HFC specimen displayed the superior durability properties under various immersion mediacompared to CC.

摨要

采用聚丙烯纤维（PP）、剑麻纤维（SF）和香蕉纤维（BF）制备了混杂纤维混凝土（HFC），并对其力学性能和耐久性进行了研究. M30级混凝土配合比设计按美国混凝土学会标准程序编制. 制作了9个不同比例的混凝土试件，对HFC进行了抗压、劈拉、抗弯和耐久性试验. 抗压、劈拉和弯曲试验结果表明，与普通混凝土（CC）相比，M3试件（PP:SF:1.5:0.5）具有最大的抗压、劈拉和弯曲强度. 与养护7天和28天的混凝土抗压强度相比，M3的抗压强度分别提高了24.3%和14.9%. 劈裂抗拉试验表明，养护7d和28d时，M3的劈裂抗拉强度值分别比CC提高47.54%和37.19%. 弯曲试验表明，M3试件在养护7天和28天后的最大弯曲强度分别为5.58 N/mm2和10.9 N/mm2. 此外，耐久性试验结果显示，与CC相比，HFC试件在各种浸没介质下表现出优越的耐久性.

KEYWORDS:

• Hybrid fiber concrete
• banana fiber
• sisal fiber
• polypropylene fiber
• mechanical properties
• durability properties

关键词:

• 混合纤维混凝土
• 香蕉纤维
• 剑麻纤维
• 聚丙烯纤维
• 机械性能
• 耐久性能

Acknowledgments

The chemicals used in this research work were supplied by Erode Chemicals Private Limited India.