自应力碱活化矿渣圆钢管混凝土界面粘结增强机理分析

Q3 Engineering

International Journal for Engineering Modelling Pub Date : 2020-12-14 DOI:10.31534/engmod.2020.3-4.ri.07m

Yu Xiaohui, Li Yongqiang, Wang Shige

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引用次数: 0

摘要

为研究自应力碱活化矿渣圆钢管混凝土的界面粘附行为及其增强机理，分别用不同掺量的硫铝酸钙和氧化钙膨胀剂制作了推出试样、膨胀性能试样以及SEM、XRD微观试样。结果表明:界面黏附应力在试样自由端70 ~ 80 mm处最大，且随膨胀剂用量的增加而增大;硫铝酸钙、氧化钙等膨胀剂可有效降低核心混凝土的干燥收缩性能，进而改善钢管与核心混凝土的相互作用。微测试分析结果表明，在AASC系统中提供膨胀功率的主要膨胀源是Ca(OH)。

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Interfacial Bond Adhesion Enhancement Mechanism Analysis of Self Stressing Alkali Activated Slag Concrete-Filled Round Steel Tube

To investigate the interfacial adhesion behaviour and its enhancement mechanism of selfstressing alkali activated slag concrete-filled round steel tube, push-out samples, expansion performance test specimens, and SEM, XRD micro-test specimens were made with different dosage of calcium sulphoaluminate and calcium oxide expansive agent. The results show that the maximum interfacial adhesion stress is at 70-80 mm from the free end of the samples, and increases with the increase of the expansive agent dosage. The expansive agent such as calcium sulphoaluminate and calcium oxide can effectively reduce the drying shrinkage performance of the core concrete, and then improve the interaction between steel tube and core concrete. Microtest analysis results show that the main expansive source providing expansive power in the AASC system is Ca(OH).

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来源期刊

International Journal for Engineering Modelling Engineering-Mechanical Engineering

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： Engineering Modelling is a refereed international journal providing an up-to-date reference for the engineers and researchers engaged in computer aided analysis, design and research in the fields of computational mechanics, numerical methods, software develop-ment and engineering modelling.