| 摘要: |
| 使用工业副产品矿渣和再生骨料制备碱矿渣再生混凝土（AARAC），符合中国“双碳”和“可持续发展”战略目标的要求.通过13组试件的基本力学性能试验，研究了再生骨料取代率和钢纤维掺量对AARAC基本力学性能的影响，并从原材料端对其进行了碳排放评价.结果表明：当再生骨料取代率为75%时，AARAC的力学性能指标与普通水泥混凝土相当；掺加钢纤维有效缓解了再生骨料对AARAC力学性能的负面影响；当再生骨料取代率为50%、钢纤维掺量为0.5%时，AARAC的力学性能优良，可持续性强；基于本文及相关文献的试验数据，建立了AARAC力学强度和弹性模量的计算公式，计算结果与试验结果吻合良好. |
| 关键词: 碱激发混凝土 再生骨料 钢纤维 力学性能 碳排放评价 |
| DOI：10.3969/j.issn.1007-9629.2024.10.009 |
| 分类号:TU528.31 |
| 基金项目:国家自然科学基金资助项目（52308248） |
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| Mechanical Properties and Carbon Emission Assessment of Steel Fiber Reinforced Alkali-Activated Slag Recycled Aggregate Concrete |
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XIA Dongtao1,2, YU Shiting1, LI Biao1, WANG Yu1, WU Chen1
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1.School of Civil Engineering Architecture and Environment， Hubei University of Technology， Wuhan 430068， China;2.Key Laboratory of Intelligent Health Perception and Ecological Restoration of River and Lake， Ministry of Education， Hubei University of Technology， Wuhan 430068， China
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| Abstract: |
| It will conform to the development goals of carbon peaking and carbon neutrality and sustainability to reutilize industrial by-products such as slag and recycled aggregate（RA） to fabricate alkali-activated slag recycled aggregate concrete（AARAC）. The effect of RA content and steel fiber volume fraction on the mechanical properties of AARAC were studied through 13 groups of basic mechanical property tests and the carbon emissions of raw materials in concrete were evaluated. The results show that the mechanical properties of AARAC with 75% RA content are comparable to those of ordinary Portland cement concrete. The negative effect of RA on the AARAC can be alleviated by the addition of steel fiber（SF）. In addition， the AARAC with 50% RA and 0.5% SF has excellent mechanical and sustainability performance. Finally， given the effect of RA content and SF volume fraction， equations are developed to predict the mechanical strength and elastic modulus of AARAC， whose calculated values fit the tested values very well. |
| Key words: alkali-activated concrete recycled aggregate steel fiber mechanical property carbon emission assessment |
