透水混凝土的强度和耐久性能
发布时间：2021-12-30 21:05
透水混凝土是一种在普通混凝土技术基础上开发的环保多孔材料。它通常含有波特兰水泥,粗骨料,各种外加剂,水和很少或没有细砂。透水混凝土的强度较低,与结构系统中有意形成的空隙互连网络的大孔隙相关,渗透雨水径流,补给地下水含水层,并通过最大限度地减少侵蚀和沉积,显着减少暴雨期间增加径流的负面影响。孔系统或相互连接的空隙有利于减轻城市地区不透水表面造成的负面环境问题,然而,由于在透水混凝土中封装聚集颗粒的水泥浆涂层有限,透水混凝土的强度微薄且具有高渗透能力。与高孔隙度相关的较低强度限制了透水混凝土在低容量交通中的应用,停车场,人行道,路径以及抗冻融能力的脆弱性是冷气候中透水混凝土的另一个长期关注点,因此,本实验调查进行了了解透水混凝土在严酷湿润饱和条件下对透水混凝土的抗冻性和抗冻机理。本研究在透水性混凝土试件中使用硅粉,偏高岭土,SBR胶乳聚合物乳液和不同比例的砂。为了平衡透水性混凝土的强度和透水性,对混合料设计和原料配比进行了优化。基于质量损失标准和测试期间的目视检查评估透水性混凝土的冻融循环性能。考察了各种外加剂对透水混凝土冻融循环性能的影响,探讨了冻害机理。冻融循环的结果表明,不同的外加剂...
【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校
【文章页数】：206 页
【学位级别】：硕士
【文章目录】：
Abstract
摘要
Chapter 1 Introduction
1.1 Research background
1.2 Problem statement
1.3 Research objectives and scope
1.4 Main approach used in this research work
1.5 Organization of Thesis
Chapter 2 Literature Review
2.1 Background
2.2 Mix Design for Durable Pervious Concrete
2.2.1 Coarse aggregate
2.2.2 Portland Cement Content
2.2.3 Fine Aggregate-Sand
2.3 Effect Of Cementitious Admixtures On Pervious Concrete Performance
2.4 Influence of curing on durability performance
2.5 Engineering properties of pervious concrete and opening to traffic
2.5.1 Compressive strength
2.5.2 Hydraulic Conductivity
2.5.3 Flexural Strength
2.6 Challenges Experience By Pervious Concrete In Cold Climates
2.6.1 Durability In Cold Climates
2.6.2 Frost Damage Behavior of pervious concrete
2.7 Durability Assessment and Performance Tests
2.7.1 Freeze-Thaw Cycling Resistance Testing
2.8 Effects of Deicing Salts and Scaling Resistance Testing
2.9 Summary
Chapter 3 Experimental investigation
3.1 Material
3.1.1 Metakaolin
3.1.2 SBR Latex
3.1.3 Polypropylene anti-cracking fiber
3.1.4 Fine sand
3.1.5 Coarse aggregate
3.2 Laboratory testing
3.2.1 Compressive strength test
3.2.2 Splitting tensile strength test
3.2.3 Flexural strength test
3.2.4 Permeability testing
3.2.5 Rapid Freeze Thaw Resistance Testing
3.2.6 Accelerated Calcium Leaching Test
3.2.7 Calcium leaching followed by freeze-thaw test
3.3 Optimization of mix design
3.3.1 Mix Design Trial Batch#1:
3.3.2 Mix Design Trial Batch#2
3.3.3 Mix Design Trial Batch#3:
3.3.4 Mix Design and proportion for modified pervious concrete
Chapter 4 General Properties of Pervious Concrete
4.1 Phase Ⅰ: Optimization of mix design for pervious concrete
4.2 Phase 2:Modification of pervious concrete
4.2.1 Compressive strength of modified pervious concretes
4.2.2 Split tensile strength of modified pervious concrete
4.2.3 Hydraulic conductivity of modified pervious concretes
4.2.4 Flexure strength of modified pervious concretes
4.3 Summary
Chapter 5 Influence of accelerated leaching on pervious concrete properties
5.1 Phase 3: Accelerated calcium leaching test results
5.1.1 Influence of leaching on compressive strength of pervious concrete
5.1.2 Mass loss of pervious concrete due to leaching
5.1.3 Mass loss of cement pastes due to leaching
5.1.4 pH evolution with leaching duration
5.2 Extended leaching test
5.2.1 pH evolution with extended leaching
5.2.2 Mass loss of pervious concrete due to extended leaching
5.2.3 Effect of extended leaching on Compressive strength of pervious concrete
5.2.4 Mass loss of cement paste mixes in extended leaching
5.2.5 Effect of extended leaching on Compressive strength of cement paste mixes
5.2.6 Calcium ion concentration monitoring
5.3 Summary
Chapter 6 Freeze-Thaw Performance and Frost damage machanism
6.1 Phase 4 : Rapid freeze-thaw cycling in saturated condition
6.2 Durability performance of pervious concrete in saturated condition
6.2.1 Effects of sand on freeze-thaw resistance
6.2.2 Effects of SBR latex(5%)on freeze-thaw resistance
6.2.3 Effects of silica fume(5%)on freeze-thaw resistance
6.2.4 Effects of metakaolin(5%)on freeze-thaw resistance
6.2.5 Combined effects of silica fume and metakaolin(5%)on freeze-thaw resistance
6.2.6 Effects of SBR latex(10%)on freeze-thaw resistance
6.2.7 Effects of silica fume(10%)on freeze-thaw resistance
6.2.8 Influence of metakaolin(10%)on freeze-thaw resistance
6.2.9 Combined effects of silica fume and metakaolin(10%)on freeze-thaw resistance
6.3 Synergistic influence of leaching and Freeze-Thaw cycling
6.3.1 Combined effect of leaching and freeze-thaw on modified pervious concrete
6.4 Summary
Chapter 7 Microstructure investigation of cement pastes
7.1 Influence of leaching on porosity of cement pastes
7.2 Effect of leaching on pore size distribution of pastes
7.3 Bulk density and porosity
7.4 Thermal analysis (TG-DTA) of unleached and leached cement pastes
7.4.1 DTA profile at 28 days leaching
7.4.2 TG analysis
7.4.3 DTA Profile at 90 days leaching
7.5 Summary
Chapter 8 Conclusions and Recommendation for future research
8.1 Conclusions
8.2 Recommendations
References
Acknowledgements
Resume
本文编号：3558960
【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校
【文章页数】：206 页
【学位级别】：硕士
【文章目录】：
Abstract
摘要
Chapter 1 Introduction
1.1 Research background
1.2 Problem statement
1.3 Research objectives and scope
1.4 Main approach used in this research work
1.5 Organization of Thesis
Chapter 2 Literature Review
2.1 Background
2.2 Mix Design for Durable Pervious Concrete
2.2.1 Coarse aggregate
2.2.2 Portland Cement Content
2.2.3 Fine Aggregate-Sand
2.3 Effect Of Cementitious Admixtures On Pervious Concrete Performance
2.4 Influence of curing on durability performance
2.5 Engineering properties of pervious concrete and opening to traffic
2.5.1 Compressive strength
2.5.2 Hydraulic Conductivity
2.5.3 Flexural Strength
2.6 Challenges Experience By Pervious Concrete In Cold Climates
2.6.1 Durability In Cold Climates
2.6.2 Frost Damage Behavior of pervious concrete
2.7 Durability Assessment and Performance Tests
2.7.1 Freeze-Thaw Cycling Resistance Testing
2.8 Effects of Deicing Salts and Scaling Resistance Testing
2.9 Summary
Chapter 3 Experimental investigation
3.1 Material
3.1.1 Metakaolin
3.1.2 SBR Latex
3.1.3 Polypropylene anti-cracking fiber
3.1.4 Fine sand
3.1.5 Coarse aggregate
3.2 Laboratory testing
3.2.1 Compressive strength test
3.2.2 Splitting tensile strength test
3.2.3 Flexural strength test
3.2.4 Permeability testing
3.2.5 Rapid Freeze Thaw Resistance Testing
3.2.6 Accelerated Calcium Leaching Test
3.2.7 Calcium leaching followed by freeze-thaw test
3.3 Optimization of mix design
3.3.1 Mix Design Trial Batch#1:
3.3.2 Mix Design Trial Batch#2
3.3.3 Mix Design Trial Batch#3:
3.3.4 Mix Design and proportion for modified pervious concrete
Chapter 4 General Properties of Pervious Concrete
4.1 Phase Ⅰ: Optimization of mix design for pervious concrete
4.2 Phase 2:Modification of pervious concrete
4.2.1 Compressive strength of modified pervious concretes
4.2.2 Split tensile strength of modified pervious concrete
4.2.3 Hydraulic conductivity of modified pervious concretes
4.2.4 Flexure strength of modified pervious concretes
4.3 Summary
Chapter 5 Influence of accelerated leaching on pervious concrete properties
5.1 Phase 3: Accelerated calcium leaching test results
5.1.1 Influence of leaching on compressive strength of pervious concrete
5.1.2 Mass loss of pervious concrete due to leaching
5.1.3 Mass loss of cement pastes due to leaching
5.1.4 pH evolution with leaching duration
5.2 Extended leaching test
5.2.1 pH evolution with extended leaching
5.2.2 Mass loss of pervious concrete due to extended leaching
5.2.3 Effect of extended leaching on Compressive strength of pervious concrete
5.2.4 Mass loss of cement paste mixes in extended leaching
5.2.5 Effect of extended leaching on Compressive strength of cement paste mixes
5.2.6 Calcium ion concentration monitoring
5.3 Summary
Chapter 6 Freeze-Thaw Performance and Frost damage machanism
6.1 Phase 4 : Rapid freeze-thaw cycling in saturated condition
6.2 Durability performance of pervious concrete in saturated condition
6.2.1 Effects of sand on freeze-thaw resistance
6.2.2 Effects of SBR latex(5%)on freeze-thaw resistance
6.2.3 Effects of silica fume(5%)on freeze-thaw resistance
6.2.4 Effects of metakaolin(5%)on freeze-thaw resistance
6.2.5 Combined effects of silica fume and metakaolin(5%)on freeze-thaw resistance
6.2.6 Effects of SBR latex(10%)on freeze-thaw resistance
6.2.7 Effects of silica fume(10%)on freeze-thaw resistance
6.2.8 Influence of metakaolin(10%)on freeze-thaw resistance
6.2.9 Combined effects of silica fume and metakaolin(10%)on freeze-thaw resistance
6.3 Synergistic influence of leaching and Freeze-Thaw cycling
6.3.1 Combined effect of leaching and freeze-thaw on modified pervious concrete
6.4 Summary
Chapter 7 Microstructure investigation of cement pastes
7.1 Influence of leaching on porosity of cement pastes
7.2 Effect of leaching on pore size distribution of pastes
7.3 Bulk density and porosity
7.4 Thermal analysis (TG-DTA) of unleached and leached cement pastes
7.4.1 DTA profile at 28 days leaching
7.4.2 TG analysis
7.4.3 DTA Profile at 90 days leaching
7.5 Summary
Chapter 8 Conclusions and Recommendation for future research
8.1 Conclusions
8.2 Recommendations
References
Acknowledgements
Resume
本文编号：3558960
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