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微小芯樣抗折法檢測混凝土抗壓強度技術研究
王大勇1,2
摘 要

(1廊坊市建設工程質量檢測中心, 廊坊 065000;2 廊坊市陽光建設工程質量檢測有限公司, 廊坊 065000)

[摘要]對直徑為44mm的微小芯樣進行抗彎折試驗以及相應齡期的立方體試件力學性能測試,獲得了微小芯樣名義抗折強度和立方體試件抗壓強度。結果表明:微小芯樣名義抗折強度與混凝土立方體試件抗壓強度存在顯著的相關性,建立的冪函數抗折法測強曲線具有足夠的工程檢測精度;對國內外混凝土抗折強度換算公式進行了比較與分析,研究結果可供工程質量檢測與控制參考。

[關鍵詞]混凝土; 微小芯樣; 抗折強度; 測強曲線

中圖分類號:TU528文獻標識碼:A文章編號:1002-848X(2019)04-0082-04

 

Technical study for inspection of concrete compressive strength by micro-core sample bending method

Wang Dayong1,2

(1 Langfang Construction Engineering Quality Testing Center, Langfang 065000, China;2 Langfang Yangguang Construction Engineering Quality Supervision Co., Ltd., Langfang 065000, China)

Abstract:The bending test was conducted on micro-core sample with a diameter of 44mm, and mechanical property test was conducted on cubic specimens with relevant ages, to obtain the nominal bending strength of micro-core sample and the compressive strength of cubic specimens. The results show that there is a significant correlation between the nominal bending strength of micro-core sample and the compressive strength of concrete cube specimens, and the established power function bending strength curve has sufficient engineering detection accuracy. The conversion formulas of concrete bending strength at home and abroad were compared and analyzed, and the results can be used as reference for engineering quality detection and control.

Keywords:concrete; micro-core sample; bending strength; strength curve

 

作者簡介:王大勇,學士,教授級高級工程師,一級建造師,Email:[email protected]

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