| 摘要: |
| 通过开展单轴拉伸与抗压力学性能试验，系统探究了BaCl2对高延性碱矿渣复合材料（HDASC）力学性能的影响.结果表明：当BaCl2掺量为3.0%时，HDASC的凝结时间延长至109 min；HDASC的初裂强度、抗拉强度及抗压强度随着BaCl2掺量的增加逐渐降低，尤其是BaCl2掺量为3.0%时，HDASC强度的下降率高达50.0%，但其拉伸应变基本维持在6.24%~9.66%的高延性区间；BaCl2的掺入使得HDASC的水化程度逐渐降低、孔隙数目增多，降低了基体的密实度，削弱了纤维与基体的黏结. |
| 关键词: 缓凝剂 氯化钡 纤维增强 碱矿渣 力学性能 |
| DOI：10.3969/j.issn.1007-9629.2023.12.009 |
| 分类号:TU526 |
| 基金项目:上海市自然科学基金资助项目（232R1444000）；国家自然科学基金资助项目（51978401，52008151） |
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| Effect of BaCl2 on Mechanical Properties of High Ductile Alkali-Activated Slag-Based Composites |
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KAN Lili1, LIU Neng1, WANG Fei2
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1.School of Environment and Architecture， University of Shanghai for Science and Technology， Shanghai 200093， China;2.College of Civil Engineering， Tongji University， Shanghai 200092， China
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| Abstract: |
| By uniaxial tensile and compressive tests， the effects of BaCl2 on the mechanical properties of high ductile alkali-activated slag-based composite （HDASC） were investigated. The results indicate that the addition of BaCl2 with 3.0% content makes the setting time prolongate to 109 min. The increase in BaCl2 content leads to gradual decrease in the initial cracking strength， tensile strength and compressive strength， especially the addition of 3.0% BaCl2 corresponds to a 50.0% decrease ratio， nevertheless， the tensile strain almost maintains the range between 6.24%-9.66%. The microscopic testing results show that the addition of BaCl2 incurs the decrease of hydration reaction degree of HDASC and the increase of pore numbers， thereby reducing the compactness of matrix and weakening the bonding between fibers and matrix. |
| Key words: retarder BaCl2 fiber-reinforced alkali-activated slag mechanical property |
