研究生: |
陳立民 Li-Min Chen |
---|---|
論文名稱: |
輕質骨材應用於透水性混凝土鋪面可行性之研究 Practicability Assessment of Pervious Concrete Pavement with Lightweight Aggregate |
指導教授: |
沈得縣
Der-Hsien Shen |
口試委員: |
黃兆龍
none 郭銘峰 none 劉明仁 none |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 118 |
中文關鍵詞: | 透水性混凝土 、配比設計法 、疲勞載重 、鋪面績效 、透水係數 、吸音係數 |
外文關鍵詞: | pervious concrete, mix design, fatigue loading, pavement performance, water pervious coefficient, sound absorption coefficie |
相關次數: | 點閱:201 下載:4 |
分享至: |
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輕質骨材應用於透水性混凝土鋪面可行性之研究
指導教授:沈得縣
研 究 生:陳立民
時 間:96年6月
論 文 摘 要
本研究係將輕質骨材部份取代天然粗粒料拌製透水性混凝土,以探討輕質骨材含量對透水性混凝土工程性質之影響。本研究分成四階段進行研究,第一階段將水泥漿添加鋼纖維、聚丙烯纖維、爐石粉、飛灰、矽灰及強塑劑,以探討改善水泥漿力學特性之方法。第二階段研發透水性混凝土配比設計法。第三階段將輕質骨材部份取代天然粗粒料拌製透水性混凝土,探討輕質骨材含量對透水性混凝土工程性質之影響。第四階段製作透水性混凝土試體進行力學性質、疲勞性質、吸音性質、透水性質及鋪面績效等試驗,以評估輕質骨材應用於透水性混凝土鋪面之可行性。
研究結果顯示:在水泥漿體中添加鋼纖維比添加聚丙烯纖維更能提升力學強度,其中以1.5%鋼纖維量為最佳;在水膠比0.18時,添加爐石粉與矽灰組之力學強度優於飛灰與矽灰組。在新拌透水性混凝土性質方面,由於輕質骨材粒料為圓型顆粒,且添加卜作嵐摻料,可改善坍度及工作性。在力學性質方面,輕質骨材屬於多孔隙材質,隨輕質骨材含量增加,抗壓強度、抗彎強度及動彈性/動剪力模數皆有下降趨勢。在鋪面績效方面,隨輕質骨材含量增加及孔隙率設計20±1%,吸音係數峯值會愈高,使減噪效果更佳;在透水性質方面,各組之透水係數皆符合日本規範要求(0.01cm/sec)。Cantabria磨耗試驗結果顯示水泥漿體具有良好黏著性及強度能提供良好抗磨耗能力。透水性混凝土表面有粗糙紋理深度,可提供路面良好抗滑能力。在耐久性質方面,隨輕質骨材含量增加,抗疲勞能力降低;因水泥漿體均勻包裹粒料表面,受硫酸鹽侵蝕時不隨輕質骨材含量增加而增加。就整體而言,輕質骨材可應用於透水性混凝土鋪面,但建議輕質骨材取代天然粗粒料含量應低於25%。
關鍵字:透水性混凝土、配比設計法、疲勞載重、鋪面績效、透水係數、吸音係數
Practicability Assessment of Pervious Concrete Pavement
with Lightweight Aggregate
Thesis Advisor : Der-Hsien Shen
Graduate student : Li-Min Chen
ABSTRACT
The aim of this study is to evaluate the performance effects of pervious concrete with various replacement proportions of lightweight aggregate. The study is consisted of four stages; Stage 1 Well be discusses how steel fiber, polypropylene fiber, slag powder, fly ash, silica fume, and superplasticizer in cement paste improve mechanical properties of cement paste. Stage 2 develops the pervious concrete mix design method. Stage 3 evaluates the engineering properties of pervious concrete which used lightweight aggregate as coarse aggregate replacement for mixtures. Stage 4 conducts laboratory tests such as fatigue test, sound absorption property and pavement performance test to evaluate the feasibility of lightweight aggregate applied in pervious concrete pavement.
The findings show that, in view of cement paste strength the steel fiber has better mechanical property than polypropylene fiber, and based on test results shown steel fiber at 1.5% brings highest strength. Moreover, in the water/binder ratio at 0.18, the binder containing cement, slag powder and silica fume has higher mechanical properties than that used of fly ash and silica fume. In property of fresh concrete, lightweight aggregate are round nature with pozzolan admixture improves the slump and workability. In mechanical property, due to lightweight aggregate its porous structure. The compression strength, bending strength and dynamic elasticity/dynamic shear modulus are decreased with increase the replacement proportion of lightweight aggregate. In pavement performance, with increase of lightweight aggregate content and porosity at 20 ± 1%, sound absorption peak value increases, bringing better noise reduction. In water permeability, the permeability coefficient meets Japanese standard requirement (0.01cm/sec). Result of Cantabria test shows that cement paste has good adhesion and strength, offer better ability of anti-corrosion. Surface of pervious concrete has significant texture, offering a good skid-resistance on pavement surface. In durability property, used of lightweight aggregate place natural coarse aggregate will result in a negative effect of fatigue behavior. Overall, lightweight aggregate can be applied in pervious concrete. However, it is suggested the content of lightweight aggregate in place of natural coarse aggregate shall not exceed 25%.
Keywords:pervious concrete, mix design, fatigue loading, pavement performance, water pervious coefficient, sound absorption coefficie
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