如今,不同尺寸和類型的粗骨料和纖維增強(qiáng)聚合物(FRP)材料已被廣泛應(yīng)用于改善混凝土的力學(xué)性能,主要為抗壓性能、抗裂性能、耐久性、延性和裂縫控制能力�；炷林械拇止橇显诨炷翉�(qiáng)度中起著至關(guān)重要的作用。玄武巖纖維是一種新型的高性能無(wú)機(jī)纖維,具有耐高溫、耐磨、抗拉強(qiáng)度高、失效應(yīng)變高的特點(diǎn)。本研究的目的是研究粗骨料對(duì)按照不同混凝土設(shè)計(jì)方法設(shè)計(jì)的普通強(qiáng)度混凝土,及外部有玄武巖纖維增強(qiáng)聚合物布(BFRP sheet)包裹約束的素混凝土的抗壓強(qiáng)度和斷裂能的影響。本次試驗(yàn)澆筑了不同規(guī)格的混凝土試塊,包括尺寸為150 mm×150 mm×150 mm的立方體試塊,尺寸分別為150 mm×300 mm和100 mm×200 mm的圓柱體試塊。玄武巖纖維布被用于外部約束圓柱形試塊的加固。根據(jù)ASTM的相關(guān)規(guī)定,測(cè)試在混凝土試塊養(yǎng)護(hù)至第28天時(shí)進(jìn)行。從試驗(yàn)結(jié)果可以看出,粗骨料的類型、含量和性質(zhì)會(huì)影響普通強(qiáng)度混凝土的抗壓強(qiáng)度。BFRP的約束顯著提高了普通強(qiáng)度混凝土的抗壓強(qiáng)度,且對(duì)混凝土的斷裂能也有很大提升。相比于使用低強(qiáng)度粗骨料的素混凝土,使用高強(qiáng)度粗骨料的混凝土試件明顯擁有更高的抗壓強(qiáng)度和斷裂能。不同的混凝土...

【文章頁(yè)數(shù)】：125 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
Acknowledgement
摘要
Abstract
Notations
Chapter 1:Introduction
    1.1 Prelude
    1.2 Concrete Ingredients
        1.2.1 Cement
        1.2.2 Water
        1.2.3 Aggregates
    1.3 Role of Aggregates
    1.4 Fiber Reinforced Polymer Materials
    1.5 Basalt Fiber Reinforced Polymer(BFRP)Properties and Applications
    1.6 Concrete Mix Design
    1.7 Literature Review
    1.8 Effect of Coarse Aggregate Size,Content and Type on Compressive Strength of Concrete
    1.9 Effect of Coarse Aggregate Size,Content and Type on Fracture Energy of Concrete
    1.10 Previous Study on FRP External Confinement of Concrete
    1.11 Previous Study on Concrete Mix Design Methods
    1.12 Research Motivation and Problem Statement
    1.13 Overall/ Specific Research Aim and Scope of Work
    1.14 Investigation Methodology
    1.15 Summary of the Previous Research Work
    1.16 Thesis Outline
Chapter 2:Experimental Program
    2.1 Introduction
    2.2 Raw Materials
    2.3 Concrete mix proportions
    2.4 Mix Design and Casting Procedure
    2.5 Specimens
    2.6 Testing Procedure
        2.6.1 Slump Test
        2.6.2 Compressive Strength Test
    2.7 Summary
Chapter 3:Results and Discussions of Plain Concrete
    3.1 Background
    3.2 Slump Test
    3.3 Failure Mode of Plain Concrete
    3.4 Comparison of Concrete Mix Design Methods
    3.5 Compressive Strength Results of PC Cube Specimens
    3.6 Compressive Strength Results of PC Cylindrical Specimens
    3.7 Accumulated Energy and Fracture Energy of Plain Concrete
    3.8 Compressive Strength of PC small cylindrical specimens100×200(mm)
    3.9 Accumulated Energy and Fracture Energy of PC Cylindrical Specimens100×200(mm)
    3.10 Specimen size effect on the compressive strength of normal strength PC concrete
    3.11 Summary
Chapter 4:Results and Discussions of BFRP Confined Concrete
    4.1 Background
    4.2 Failure Mode of BFRP Confined Plain Concrete
    4.3 Compressive Strength Test Results of Single BFRP Wrapped Cylindrical Specimens
    4.4 Accumulated Energy and Fracture Energy of BFRP Confined Concrete of20 mm NMS
    4.5 Compressive Strength of BFRP confined concrete made with15 mm natural rounded CA.
    4.6 Accumulated Energy and Fracture Energy of BFRP Confined Concrete of NR-15 mm
    4.7 Compressive Strength of BFRP confined cylindrical specimens of size100×200(mm)
    4.8 Accumulated Energy and Fracture Energy of BFRP confinedcylindrical specimens of size 100×200 (mm)
    4.9 Comparison of Compressive strength,Accumulated Energy and Fracture Energy Results ofdifferent size of BFRP confined specimens
    4.10 Summary
Chapter 5:Conclusion and Future Recommendations
    5.1 Summary
    5.2 Conclusions
    5.3 Recommendations for Future Work
References
Author Bibliography
Appendixes



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