透水混凝土是一種在普通混凝土技術(shù)基礎上開發(fā)的環(huán)保多孔材料。它通常含有波特蘭水泥,粗骨料,各種外加劑,水和很少或沒有細砂。透水混凝土的強度較低,與結(jié)構(gòu)系統(tǒng)中有意形成的空隙互連網(wǎng)絡的大孔隙相關(guān),滲透雨水徑流,補給地下水含水層,并通過最大限度地減少侵蝕和沉積,顯著減少暴雨期間增加徑流的負面影響�？紫到y(tǒng)或相互連接的空隙有利于減輕城市地區(qū)不透水表面造成的負面環(huán)境問題,然而,由于在透水混凝土中封裝聚集顆粒的水泥漿涂層有限,透水混凝土的強度微薄且具有高滲透能力。與高孔隙度相關(guān)的較低強度限制了透水混凝土在低容量交通中的應用,停車場,人行道,路徑以及抗凍融能力的脆弱性是冷氣候中透水混凝土的另一個長期關(guān)注點,因此,本實驗調(diào)查進行了了解透水混凝土在嚴酷濕潤飽和條件下對透水混凝土的抗凍性和抗凍機理。本研究在透水性混凝土試件中使用硅粉,偏高嶺土,SBR膠乳聚合物乳液和不同比例的砂。為了平衡透水性混凝土的強度和透水性,對混合料設計和原料配比進行了優(yōu)化�；谫|(zhì)量損失標準和測試期間的目視檢查評估透水性混凝土的凍融循環(huán)性能�？疾炝烁鞣N外加劑對透水混凝土凍融循環(huán)性能的影響,探討了凍害機理。凍融循環(huán)的結(jié)果表明,不同的外加劑... 

【文章來源】：哈爾濱工業(yè)大學黑龍江省 211工程院校 985工程院校

【文章頁數(shù)】：206 頁

【學位級別】：碩士

【文章目錄】：
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



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