透水混凝土受凍融,火害或落塵量之初步研究

The Preliminary Study of Fire Damage,Freeze-Thaw or Dustfall of Pervious Concrete

謝耀東(Yao-Tung Hsieh)

指導教授 ： 李明君

朝陽科技大學/理工學院/營建工程系/碩士(2007年)

摘要

透水混凝土能降低鋪面區域的逕流量，減少設置暴雨滯洪，降低雨水排水管線的需要量，又可過濾雜質使得水污染降低，且可儲存地下水，確保水資源。「透水混凝土」若使用於高速公路，則剛性路面面層混凝土抗彎強度應達到45kg/cm2 之要求，且歐洲方面因有使用於建築物，所以高溫火害、凍融循環及落塵量大小等，亦應為重要因素，藉由本研究將可提供工程設計與施工之參考。
本研究結果發現，透水混凝土試體經過凍融循環之抗壓強度大都比控制組略減，但其抗彎強度受600 回凍融循環影響卻是小幅下降之後再小幅上升約20％；而透水混凝土在700℃或800℃高溫2 小時下，試體仍未爆裂也無裂紋產生，但試體抗壓強度與抗彎強度均大幅減少，下降幅度高溫700℃約下降至30％至60％，高溫800℃約下降至20％至40％；落塵量經模擬20 年的累積量對會使透水混凝土之透水能力影響不大。

關鍵字

透水混凝土 ； 火害 ； 凍融 ； 落塵量

並列摘要

Pervious concrete can reduce runoff capacity of pavement area, decreasing set up a storm-water detention, reducing the amount of requiring rain drainage pipes, and rainwater can filter into ground, allowing groundwater resources to
renew in time. If pervious concrete is used in the highway rigid pavement, the flexural strength of pervious concrete is required to reach 45 kg/cm2 strength specification. Fire damage, freeze-thaw or dust-fall should be important factors since European countries have been used pervious concrete in buildings construction. By this study of pervious concrete will be valuable for design and construction of practice.
The study results were showed that the compression strength of pervious concrete specimen through freeze-thaw test is lower than the control one, the flexural strength of pervious concrete specimen through 600 freeze-thaw cycles first decrease and increase 20% later. It could hardly be detected any crack in the fire-damage test at the temperature of 700 ℃ above and fire duration of 2
hours. There is some damaged influence on strength after the fire-attack test, the strength loss can range from about 20％~60％. Dust fall accumulation in simulating 20 years was a minor factor for the field permeability of pervious concrete pavement.

並列關鍵字

freeze-thaw ； dust-fall ； pervious concrete ； Fire damage

參考文獻

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