Experimental Study On Testing Method Of Prefabricate Concrete Strength Considering Age

With the development of prefabricated buildings,the quality of prefabricated components has higher standards.Prefabricated components age has a great influence on the design and construction of buildings,the working performance of concrete,the reliability of structures and the inspection acceptance of component quality.Considering the influence of age on the structure,quality,strength development law and inspection method of prefabricated components,it is great significance to the actual project.Through the test method to explore the strength detection of prefabricated components,considering the influence of age factors,compare whether various detection methods of concrete are also suitable for the detection of prefabricated components.Compared with the research results of concrete testing at home and abroad,combined with the current national norms and regulations,this paper comprehensively discusses the strength testing methods of prefabricated components.For a batch of components,the rebound method,ultrasonic rebound synthesis method,pull off method and core drilling method are used to test,analyze and compare,and study the detection accuracy.Based on the results of all the methods used,it is found that the rebound method can reflect the strength of precast concrete more truly.Through the analysis of the test data curve,a strength measurement curve about the penetration method is proposed to be inferred,which can be used in the actual engineering test,and the accuracy of engineering verification and test correction continues.For the mass production of components,the rebound big data method is used for testing statistics.According to the test statistics of a lot of components,when the age reaches 12 days or more,the relative standard deviation of the average rebound value is small and the strength value is stable,so it can be tested as an inspection batch.There is no inferred fitting curve and test method in the experimental study.Further tests should be carried out to determine its applicability and accuracy.Figure 30;Table 31;Reference 57...