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材料导报  2023, Vol. 37 Issue (2): 21060162-6    https://doi.org/10.11896/cldb.21060162
  无机非金属及其复合材料 |
粉煤灰地聚物混凝土性能与环境影响的综合评价
梁永宸1,2, 石宵爽1,2,*, 张聪1,2, 张滔1,2, 王晓琪1,2
1 四川大学建筑与环境学院,深地科学与工程教育部重点实验室,成都 610065
2 四川大学建筑与环境学院,破坏力学与工程防灾减灾四川省重点实验室,成都 610065
Comprehensive Evaluation of the Performance and Environmental Impact of Fly Ash Geopolymer Concrete
LIANG Yongchen1,2, SHI Xiaoshuang1,2,*, ZHANG Cong1,2, ZHANG Tao1,2, WANG Xiaoqi1,2
1 MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
2 Failure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
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摘要 目前对粉煤灰地聚物混凝土环境影响评价大多数只考虑环境效益单方面的因素,而力学性能和耐久性能是材料在工程应用中的重要评价指标,材料选取需要同时考虑其力学性能、耐久性能与环境影响。因此,本工作采用生命周期评价(LCA)方法,选取抗压强度、抗硫酸盐侵蚀性能和环境影响为评价指标,设计九组配合比的粉煤灰地聚物混凝土进行环境影响和抗硫酸盐侵蚀的量化分析,利用灰色聚类评价方法建立综合评价模型。结果表明:(1)粉煤灰地聚物混凝土的环境影响主要来自原材料生产阶段,占比高达73%以上;(2)粉煤灰地聚物混凝土的环境效益随碱激发剂用量、粉煤灰用量和硅酸钠与氢氧化钠比值的增大而降低,碱激发剂用量对环境效益影响最大;抗压耐蚀系数越大其抗硫酸盐侵蚀性能越好;(3)在本试验中,配合比1的环境效益最优,配合比5抗硫酸盐侵蚀性能最优,配合比3综合性能最优。
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梁永宸
石宵爽
张聪
张滔
王晓琪
关键词:  粉煤灰地聚物混凝土  生命周期评价(LCA)  抗压强度  硫酸盐侵蚀  综合评价    
Abstract: Most of the existing environmental impact assessments of fly ash geopolymer concrete only consider the unilateral factors of environmental benefits, while mechanical properties and durability are important evaluation indicators for materials in engineering applications. Material selection needs to consider its mechanical properties, durability and environmental impact at the same time. In this work, the life cycle evaluation (LCA) method was adopted, and the compressive strength, sulfate resistance and environmental impact were selected as evaluation indicators, and design 9 groups mix of fly ash geopolymer concrete were designed for quantitative analysis of environmental impact and resistance to sulfate erosion. The comprehensive evaluation model is established by grey clustering evaluation method. The results show that: (Ⅰ) the environmental impact of fly ash geopolymer concrete mainly comes from the raw material production stage, accounting for up to 73%. (Ⅱ) The environmental benefits of fly ash geopolymer concrete decrease with the increase of alkali activator dosage, fly ash dosage and the ratio of sodium silicate to sodium hydroxide, and the amount of alkali activator used has the greatest impact on environmental benefits;the larger the compressive corrosion resistance coefficient, the better the sulfate corrosion resistance. (Ⅲ) In the experiment, mix 1 has the best environmental benefit, mix 5 has the best sulfate resistance performance, mix 3 has the best overall performance.
Key words:  fly ash geopolymer concrete    life cycle assessment (LCA)    compressive strength    sulfate resistance    comprehensive performance evaluation
出版日期:  2023-01-25      发布日期:  2023-02-08
ZTFLH:  TU502  
基金资助: 四川省科技厅应用基础研究项目(2020YJ0319)
通讯作者:  *石宵爽,副教授,硕士研究生导师,2011年12月毕业于四川大学建筑与环境学院,获得博士研究生学位。主要从事新型混凝土材料的多尺度研究。在国内外重要期刊发表文章40多篇。   
作者简介:  梁永宸,2015—2019年于福州大学土木工程学院攻读学士学位,2019年9月起至今于四川大学建筑与环境学院攻读硕士学位,主要从事固废物资源化利用研究。
引用本文:    
梁永宸, 石宵爽, 张聪, 张滔, 王晓琪. 粉煤灰地聚物混凝土性能与环境影响的综合评价[J]. 材料导报, 2023, 37(2): 21060162-6.
LIANG Yongchen, SHI Xiaoshuang, ZHANG Cong, ZHANG Tao, WANG Xiaoqi. Comprehensive Evaluation of the Performance and Environmental Impact of Fly Ash Geopolymer Concrete. Materials Reports, 2023, 37(2): 21060162-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21060162  或          http://www.mater-rep.com/CN/Y2023/V37/I2/21060162
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