高活性硅灰改性渠道衬砌胶材性能及微观机理研究

【目的】探明矿物掺合料对衬砌胶材的宏、微观性能的影响。【方法】分别以普通硅酸盐水泥(PO)、硫铝酸盐水泥(SAC)、铝酸盐水泥(AC)为基础材料,以硅灰为替代材料,制备了15种复合胶材。基于抗压强度和抗渗试验,联合SEM、EDS、XRD表征手段,探究复合胶材力学演变规律,揭示其微观水化机理。【结果】随着硅灰替代率的增加,PO、SAC和AC硬化体的抗渗性能逐渐增强;硅灰替代率为6%时,PO的早期抗压强度显著提高,C-S-H凝胶和AFt晶体彼此胶结构成三维网络结构,有效减缓了因Ca(OH)2简单堆叠引起的剪切滑移和基体早期强度衰退,C-S-H凝胶的Ca/Si降低、聚合度增加提高了体系强度的稳定性;...

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Published inGuanʻgai paishui xuebao Vol. 42; no. 6; pp. 126 - 134
Main Authors ZHANG Xuanshuo, LI, Hongbo, LI, Sheng, DING Yongfa
Format Journal Article
LanguageChinese
Published Xinxiang City Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 01.06.2023
宁夏大学土木与水利工程学院,银川750021%宁夏大学土木与水利工程学院,银川750021
宁夏节水灌溉与水资源调控工程技术研究中心,银川750021
旱区现代农业水资源高效利用教育部工程研究中心,银川750021
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ISSN1672-3317
DOI10.13522/j.cnki.ggps.2022611

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Abstract 【目的】探明矿物掺合料对衬砌胶材的宏、微观性能的影响。【方法】分别以普通硅酸盐水泥(PO)、硫铝酸盐水泥(SAC)、铝酸盐水泥(AC)为基础材料,以硅灰为替代材料,制备了15种复合胶材。基于抗压强度和抗渗试验,联合SEM、EDS、XRD表征手段,探究复合胶材力学演变规律,揭示其微观水化机理。【结果】随着硅灰替代率的增加,PO、SAC和AC硬化体的抗渗性能逐渐增强;硅灰替代率为6%时,PO的早期抗压强度显著提高,C-S-H凝胶和AFt晶体彼此胶结构成三维网络结构,有效减缓了因Ca(OH)2简单堆叠引起的剪切滑移和基体早期强度衰退,C-S-H凝胶的Ca/Si降低、聚合度增加提高了体系强度的稳定性;SAC硬化体3、28 d龄期的抗压强度均随着硅灰替代率的增加呈先增大后减小的变化趋势,硅灰的成核效应、火山灰效应促使SAC水化产物增加;随着硅灰替代率的增加,AC硬化体3、28 d龄期强度呈负增长,90 d龄期强度先增大后降低,掺入4%硅灰制约了CAH10、C2AH8的转晶反应,孔隙率明显降低,改善了AC的后期强度倒缩现象。【结论】适宜的硅灰掺量可提高衬砌板胶材强度、优化体系微观形貌,从而提升抗渗特性,因此建议将硅灰应用至渠道衬砌。
AbstractList 【目的】探明矿物掺合料对衬砌胶材的宏、微观性能的影响。【方法】分别以普通硅酸盐水泥(PO)、硫铝酸盐水泥(SAC)、铝酸盐水泥(AC)为基础材料,以硅灰为替代材料,制备了15种复合胶材。基于抗压强度和抗渗试验,联合SEM、EDS、XRD表征手段,探究复合胶材力学演变规律,揭示其微观水化机理。【结果】随着硅灰替代率的增加,PO、SAC和AC硬化体的抗渗性能逐渐增强;硅灰替代率为6%时,PO的早期抗压强度显著提高,C-S-H凝胶和AFt晶体彼此胶结构成三维网络结构,有效减缓了因Ca(OH)2简单堆叠引起的剪切滑移和基体早期强度衰退,C-S-H凝胶的Ca/Si降低、聚合度增加提高了体系强度的稳定性;SAC硬化体3、28 d龄期的抗压强度均随着硅灰替代率的增加呈先增大后减小的变化趋势,硅灰的成核效应、火山灰效应促使SAC水化产物增加;随着硅灰替代率的增加,AC硬化体3、28 d龄期强度呈负增长,90 d龄期强度先增大后降低,掺入4%硅灰制约了CAH10、C2AH8的转晶反应,孔隙率明显降低,改善了AC的后期强度倒缩现象。【结论】适宜的硅灰掺量可提高衬砌板胶材强度、优化体系微观形貌,从而提升抗渗特性,因此建议将硅灰应用至渠道衬砌。
TU528.041; [目的]探明矿物掺合料对衬砌胶材的宏、微观性能的影响.[方法]分别以普通硅酸盐水泥(PO)、硫铝酸盐水泥(SAC)、铝酸盐水泥(AC)为基础材料,以硅灰为替代材料,制备了 15种复合胶材.基于抗压强度和抗渗试验,联合SEM、EDS、XRD表征手段,探究复合胶材力学演变规律,揭示其微观水化机理.[结果]随着硅灰替代率的增加,PO、SAC和AC硬化体的抗渗性能逐渐增强;硅灰替代率为6%时,PO的早期抗压强度显著提高,C-S-H凝胶和AFt晶体彼此胶结构成三维网络结构,有效减缓了因Ca(OH)2简单堆叠引起的剪切滑移和基体早期强度衰退,C-S-H凝胶的Ca/Si降低、聚合度增加提高了体系强度的稳定性;SAC硬化体3、28 d龄期的抗压强度均随着硅灰替代率的增加呈先增大后减小的变化趋势,硅灰的成核效应、火山灰效应促使SAC水化产物增加;随着硅灰替代率的增加,AC硬化体3、28d龄期强度呈负增长,90 d龄期强度先增大后降低,掺入4%硅灰制约了 CAH10、C2AH8的转晶反应,孔隙率明显降低,改善了 AC的后期强度倒缩现象.[结论]适宜的硅灰掺量可提高衬砌板胶材强度、优化体系微观形貌,从而提升抗渗特性,因此建议将硅灰应用至渠道衬砌.
Author DING Yongfa
LI, Sheng
LI, Hongbo
ZHANG Xuanshuo
AuthorAffiliation 宁夏大学土木与水利工程学院,银川750021%宁夏大学土木与水利工程学院,银川750021;宁夏节水灌溉与水资源调控工程技术研究中心,银川750021;旱区现代农业水资源高效利用教育部工程研究中心,银川750021
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LI Hongbo
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ZHANG Xuanshuo
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Issue 6
Keywords 力学性能
silica fume
渠道衬砌胶材
硅灰
C2AH8
微观结构分析
channel lining cementing material
mechanical property
microstructure analysis
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PublicationTitle Guanʻgai paishui xuebao
PublicationTitle_FL Journal of Irrigation and Drainage
PublicationYear 2023
Publisher Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
宁夏大学土木与水利工程学院,银川750021%宁夏大学土木与水利工程学院,银川750021
宁夏节水灌溉与水资源调控工程技术研究中心,银川750021
旱区现代农业水资源高效利用教育部工程研究中心,银川750021
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Snippet 【目的】探明矿物掺合料对衬砌胶材的宏、微观性能的影响。【方法】分别以普通硅酸盐水泥(PO)、硫铝酸盐水泥(SAC)、铝酸盐水泥(AC)为基础材料,以硅灰为替代材料,制备了15种复合胶...
TU528.041; [目的]探明矿物掺合料对衬砌胶材的宏、微观性能的影响.[方法]分别以普通硅酸盐水泥(PO)、硫铝酸盐水泥(SAC)、铝酸盐水泥(AC)为基础材料,以硅灰为替代材料,制备了...
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StartPage 126
SubjectTerms Calcium hydroxide
Calcium silicate hydrate
Cement
Composite materials
Compressive strength
Concrete
Crystallization
Crystals
Degree of polymerization
Environmental conditions
Hydration
Linings
Mechanical properties
Nucleation
Pastes
Permeability
Porosity
Portland cement
Portland cements
Reversion
Salinization
Silica
Silica fume
Silicon
Slaked lime
Soil porosity
Soil salinity
Soil strength
Sulfoaluminate cement
Title 高活性硅灰改性渠道衬砌胶材性能及微观机理研究
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