Method for verifying adhesive property of BFRP polypropylene fiber coral concrete

Abstract

The invention discloses a method for verifying the adhesive property of BFRP polypropylene fiber coral concrete, which comprises the following operation steps of: 1, testing the compressive strength, the splitting tensile strength and the breaking strength of a polypropylene fiber coral concrete test block by measuring the basic mechanical property; 2, enabling a BFRP polypropylene fiber coral concrete drawing test piece to be subjected to bonding performance influence factor and bond slip constitutive relation testing through a center drawing experiment, and 3, obtaining a conclusion by analyzing experimental data. The polypropylene fiber is added, so that generation of cement matrix microcracks can be controlled, stress concentration in concrete is relieved, cracks are effectively prevented from being generated and expanded, the adhesive property between the BFRP and the coral concrete can be researched, the stress process and the failure mechanism of bonding slippage of the BFRP and the coral concrete are analyzed, and a reference basis is provided for engineering application and design calculation of a coral concrete structure.

Description

technical field [0001] The invention relates to the technical field of coral concrete, in particular to a method for verifying the bonding performance of BFRP polypropylene fiber coral concrete. Background technique [0002] Coral reef is a structure formed by animals of the order stony corals. Coral reefs exist in the East China Sea and South my country Sea. The cylinder compressive strength of coral debris is about 2.0MPa. It is a natural building aggregate. Coral debris is used as Coarse aggregate, coral sand as fine aggregate and coral aggregate concrete mixed with seawater can have a compressive strength of 20-40Mpa, which belongs to lightweight aggregate concrete. Polypropylene fiber is a low elastic modulus, discontinuous A new type of concrete reinforcing fiber, which has high-quality properties of improving concrete crack resistance, anti-seepage, durability and tensile strength, is often called the secondary reinforcement of concrete. Because coral is a porous and li...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a verification method for the bonding performance of BFRP polypropylene fiber coral concrete, to solve the research on the bonding performance of BFRP and polypropylene fiber coral concrete, and the effect of polypropylene fiber content on the bonding performance between BFRP and coral concrete The application range of coral concrete is mostly concentrated in low-level concrete projects such as unreinforced concrete cushions

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