Experimental Study On Concrete Strength Curve In Henan Province Based On Post-installation Extraction Method

Due to the advantages of convenient materials,low cost,and good durability,concrete is widely used in China's infrastructure projects.Therefore,the quality of concrete is related to the quality and service life of China's infrastructure projects,and concrete strength is an important reference to ensure the quality of concrete.The commonly used methods for detecting the strength of concrete include the post-installation extraction method,cube compression method,rebound method,and core drilling method.Among them,the post-installation extraction method has high accuracy,relatively simple operation,and less damage to the structure.Therefore,if we can establish a local concrete strength curve based on the post-installation extraction method in Henan Province,it will have important practical significance for improving the local concrete structure strength detection accuracy,perfecting the concrete quality inspection and evaluation system,and prolonging the service life of the concrete structure.This article selects two commercial concretes,namely A and B in Henan Province,to carry out the same-condition maintenance and standard maintenance under the post-installation extraction method,cube compression,rebound method,and drill core method to test the strength of concrete.The local strength curve test in the Henan area of France,the main work is as follows:(1)Based on the comparison and evaluation of the advantages and disadvantages of several concrete testing methods,this article adopts two commonly used commercial concrete(A and B)in Henan Province and adopts two conservation methods based on standard maintenance and the same conditions to carry out different maintenance.The cube compressive strength,core strength,rebound strength,and post-loading strength tests of concrete with different mix ratios were tested.(2)Comparing and analyzing the relationship among different curing conditions,cube compressive strength,core strength,rebound strength,and pullout force ofdifferent commercial concretes,a strength curve based on the post-installation extraction method for different concretes in Henan Province was established.(3)Comparing and analyzing the relationship among different curing conditions,cube compressive strength,core strength,rebound strength,and pullout force of different commercial concretes,a strength curve based on the post-installation extraction method for different concretes in Henan Province was established.Based on the analysis of a large amount of experimental data,the paper establishes the strength curve of the concrete strength measured by the post-installation extraction method in Henan Province.The research results provide technical support for the evaluation of the strength of concrete structures through the post-installation extraction method in Henan Province.The promotion and application of detection methods for the post-installation extraction method in this area has important engineering significance.