高強度纖維透水混凝土磨耗與堵塞維護之初步研究

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謝宜呈(Yi-Cheng Hsieh) 查詢紙本館藏

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土木工程學系

論文名稱

高強度纖維透水混凝土磨耗與堵塞維護之初步研究
(Abrasion and clogging maintenance of high-strength fiber reinforced pervious concrete)

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★ 底灰及飛灰混凝土碳養護之工程性質研究

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摘要(中)

本研究包含高強度透水混凝土與普通強度透水混凝土兩部分，高強度透水混凝土採用分層搗實次數與調整夯實能量建議作為研究的試驗配比，以製作混凝土28天抗壓強度42 MPa及孔隙15%為目標，並探討高強度與普通強度透水混凝土添加玻璃纖維（體積比0.25%、0.5%）及鋼纖維（體積比1%、2%）之加勁材，對抗壓強度、抗彎強度、彈性模數、韌性、磨損等之力學影響；另外，探討其服務維護階段，雨水夾帶大量砂土與落塵堵塞對透水係數之影響，採用ACI 522R_06變水頭滲透試驗配置，以φ9.5×15cm PVC管柱模擬落塵試驗與高濁度泥砂水堵塞現象，並探討透水混凝土海水淡化能力及稀硫酸溶液侵入之酸鹼值及導電度變化。
試驗結果顯示高強度透水混凝土添加足夠的玻璃纖維與鋼纖維，抗壓強度可提升，但低纖維含量其抗壓強度低於無纖維之高強度透水混凝土；透水混凝土抗彎強度亦會隨著養護齡期的增加而提升，但含玻璃纖維或鋼纖維之配比強度並無此趨勢發展，推測是由於具有不同纖維的透水混凝土的質量控制存在較大差異。高強度纖維透水混凝土其彈性模數皆與3795√fc’相當接近；高強度透水混凝土經玻璃纖維或鋼纖維加勁，抗彎強度與韌性皆有一定程度的提升，效果以鋼纖維較佳，可以提升韌性，於強度峰值後仍有30%左右承載力緩緩下降直至完全破壞，中點位移量可超過10mm。
磨損試驗結果顯示骨材越大耐磨性越差，且加入纖維後可增加混凝土耐磨能力；落塵堵塞模擬和高泥砂水侵入試驗發現使用吸塵與高壓水柱維護皆有效可提升透水性能，僅需2~3次維護即可恢復透水力6成左右；有關海水侵入結果顯示pH值會上升但鹽度並無改變；稀硫酸入侵結果顯示於倒入0.5公升後，pH值下降導電度上升，此趨勢各配比差異不大。

摘要(英)

This study includes high strength and ordinary strength fiber reinforced pervious concretes. The mixtures of high strength pervious concrete were improved by adjusting the compaction energy and the layered tamping times. The high strength pervious concretes aims to carry out 28-day compressive strength above 42 MPa and porosity as close to 15% as possible to achieve the technical specifications. Both high strength and ordinary strength pervious concrete specimens reinforced with glass fiber (volume ratio of 0.25%, 0.5%) and steel fiber (1%, 2%) were observed and investigated in the compressive strength, flexural strength, elastic modulus, toughness, and abrasion resistance tests. In addition, experimental simulation of large amount of sand and dust clogging tests on the permeability coefficient during the service and maintenance phase were under evaluation. The falling-head permeameter test setup according to the ACI 522R-06 standard with a φ9.5×15cm PVC pipe was used to simulate the high mud sand and dust clogging phenomenon, and discuss the desalination ability of pervious concrete and the change of pH value and conductivity of dilute sulfuric acid solution test.
The test results show that high-strength pervious concrete with sufficient glass fiber and steel fiber could increase the compressive strength. However, the compressive strength of low-fiber content is lower than those ones without fiber. The flexural strength of pervious concrete will also increase as the curing age increases. However, the flexural strength of pervious concrete with glass fiber or steel fiber does not follow this trend due to large variation by quality control of pervious concrete with different fibers. Regardless of whether the high-strength pervious concrete mixture is improved or not, the modulus of elasticity is very close to 3795√f’c. The steel fiber can be the effective material to improve the bending strength and toughness properties of the pervious concrete. The results show about 30% of the bearing capacity gradually decreases after the peak strength until it is completely destroyed. The displacement of the midpoint can exceed 10 mm. The results of the abrasion test show that the larger the aggregate, the worse the abrasion resistance, and the fiber can increase the abrasion resistance of the concrete. The high mud sand and dust clogging results show that the pervious concrete can effectively improve the water permeability by vacuum sweeping and high-pressure washing maintenance. The water permeability could be restored to about 60% after optimal maintenance. The results of seawater intrusion show that the pH value will rise but the salinity has not changed. The results of the dilute sulfuric acid intrusion show that after pouring 0.5 liters, the pH value will decrease and the conductivity will increase. However, this trend has little difference in the mix proportion.

關鍵字(中)

★ 高強度透水混凝土
★ 纖維透水混凝土
★ 磨耗
★ 堵塞維護

關鍵字(英)

★ High Strength Pervious Concrete
★ Fiber Reinforced Pervious Concrete
★ Abrasion
★ clogging and maintenance

論文目次

摘要 I
Abstract III
致謝 V
目錄 VII
圖目錄 XI
表目錄 XVIII
附圖目錄 XIX
附表目錄 XXII
第一章緒論 1
1.1研究動機 1
1.2 研究目的 2
第二章文獻回顧 3
2.1多孔隙鋪面 3
2.1.1排水鋪面 3
2.1.2 透水性鋪面 4
2.1.3 排水性及透水性鋪面比較 5
2.2. 多孔隙混凝土 7
2.3纖維混凝土(FRC) 13
2.4 透水混凝土磨損與堵塞試驗 16
2.4.1透水混凝土耐磨試驗 17
2.4.2透水混凝土堵塞試驗 23
第三章研究規劃與試驗方法 26
3.1研究規劃與製作 26
3.2試驗配比及編號 30
3.2.1試體編號 30
3.2.2試驗配比 31
3.3試驗材料 33
3.3.1骨材 33
3.3.2 II型水泥 34
3.3.3 矽灰 35
3.3.4 拌合水 36
3.3.5 強塑劑 36
3.3.6 鋼纖維 37
3.3.7 玻璃纖維 38
3.4 試體製作 39
3.4.1 試體模具 41
3.4.3攪拌機具 42
3.5 孔隙率量測與變水頭試驗 43
3.5.1 孔隙率量測 43
3.5.2變水頭試驗(透水係數量測) 43
3.5.3恆溫水槽 44
3.6 抗壓試驗、彈性模數 45
3.6.1 抗壓試驗機 45
3.6.2 彈性模數應變環 46
3.6.3 TML 靜態資料擷取器(TDS 530) 47
3.7 抗彎強度 (撓曲強度) 48
3.8 磨損試驗 50
3.8.1載重式旋轉磨損試驗機 51
3.8.2洛杉磯磨損試驗儀 52
3.9堵塞維護與特殊環境污染試驗 53
3.9.1砂土堵塞與維護 54
3.9.2特殊環境模擬 57
第四章結果與討論 59
4.1透水混凝土配比及基本材料試驗 59
4.1.1透水混凝土配比之抗壓強度 59
4.1.2 透水混凝土各配比彈性模數值 66
4.1.3透水混凝土孔隙率及透水係數 70
4.1.4透水混凝土抗彎強度 73
4.1.5透水混凝土韌性 78
4.1.6 結語 79
4.2透水混凝土磨損試驗 83
4.2.1 ASTM C944混凝土表面磨損試驗 83
4.2.2 ASTM C1747 透水混凝土洛杉磯撞擊磨損試驗 89
4.2.3結語 99
4.3透水混凝土堵塞模擬與維護 100
4.4特殊環境模擬 110
4.4.1高鹽度溶液 110
4.4.2稀硫酸溶液 114
4.4.3結語 119
5.1結論 120
5.2建議 122
參考文獻 123
附圖 129
附表 145

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指導教授

王勇智李明君(Yung-Chih Wang Ming-Gin Lee)

審核日期

2020-7-7

推文