Method for evaluating interface bonding performance of geopolymer mortar and concrete

Abstract

The invention discloses a method for evaluating the interface bonding performance of geopolymer mortar and concrete. The method comprises the following steps: constructing a concrete matrix evaluation model; constructing a mesoscopic material model of the geopolymer mortar; constructing a cohesive force contact model, wherein the cohesive force contact model is used for performing finite element simulation on the weak interface area of the geopolymer mortar and the concrete; performing data simulation calculation based on the concrete matrix evaluation model, the mesoscopic material model and the cohesive force contact model to obtain a shear load and slip curve, evaluating the shear performance of the geopolymer mortar and the concrete matrix based on the shear load and slip curve, and evaluating the interface bonding performance between the geopolymer mortar and the concrete matrix. According to the method, the adhesive property of the geopolymer mortar and concrete interface can be evaluated quickly, accurately and systematically, and important reference is provided for obtaining a novel repairing and reinforcing composite material with excellent adhesive property and applying the novel repairing and reinforcing composite material to engineering practice.

Description

technical field [0001] The invention relates to the technical field of evaluating the interface bonding performance of construction materials, in particular to a method for evaluating the interface bonding performance of geopolymer mortar and concrete. Background technique [0002] As a new type of green cementitious material, geopolymer has better mechanical properties and environmental benefits than portland cement. Geopolymers are made of raw materials such as high silicon and high aluminum minerals and wastes, which are formed by alkali excitation and are made of SiO 4 and AlO 4 A three-dimensional network structure composed of tetrahedral units. Geopolymers have excellent properties such as high temperature resistance, high strength, corrosion resistance and durability. In recent years, researchers have used geopolymers to formulate geopolymer mortars or composite materials that can be used for structural reinforcement, and have carried out specific studies on their ...

AI Technical Summary

Problems solved by technology

Due to the serious discretization of test data and the difficulty of continuous description of the whole process of interface peeling, the test alone is not enough to fully and accurately obtain the interface separation process and local details of geopolymer mortar and concrete matrix.

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