短龄期高强混凝土回弹法地区测强曲线试验研究

Experimental Study on Regional Strength Curve of Short Age High Strength Concrete by Rebound Method

基于采集到的广东地区高强混凝土不同短龄期试件(1、3、7、14 d)的抗压强度和试件内外回弹硬度数据,分析了短龄期高强混凝土试件内外硬度的差异,研究得出建立广东地区测强曲线所适用的混凝土浇筑养护龄期范围下限值,建立具有较高精度的广东地区地方性的高强混凝土测强曲线,为地区测强曲线的研究提供参考。

Based on the collected compressive strength and internal and external rebound hardness data of high strength concrete specimens at different short ages in Guangdong(1,3,7,14d),the difference of internal and external hardness of short-age high-strength concrete specimens is analyzed. The suitable concrete pouring and curing age range for the establishment of strength measurement curve in Guangdong is studied,and the local strength measurement curve of high-strength concrete in Guangdong with high accuracy is established,which can provide reference for the study of regional strength measurement curve in this region for reference.