氣冷高爐石應用於透水混凝土之研究

Study on Air-cooled Blast Furnace Slag Used for Pervious Concrete

黃基峰(Chi-Fong Huang)

指導教授 ： 吳志興

國立屏東科技大學/工學院/土木工程系所/碩士(2014年)

https://doi.org/10.6346/NPUST.2014.00053

摘要

本文以中國鋼鐵股份有限公司煉製鋼鐵之副生氣冷高爐石作為透水混凝土骨材，製作水灰比W∕C=0.37至0.49透水混凝土試體，骨材粒徑為 4.8~19.1 mm。搗實工具為長條型鋼棒，底部為直徑5 cm、厚度2 cm之圓型鋼板及底部為5×5 cm、厚度2 cm之方型鋼板二種搗實工具，分別用於圓柱試體及樑試體，並以相同的搗實程度製作試體，施作抗壓強度、抗彎強度、透水係數及孔隙率試驗，以期在滿足透水性、保水性之要求下，尋求最大混凝土強度之水灰比W/C。試驗結果顯示，28天的最大抗壓強度fc及最大破裂模數R皆發生在W/C＝0.48之配比，其值各為fc＝171.4 kgf/cm2和R＝41.1 kgf/cm2。該配比之水泥用量為350 kg、拌和水為160 kg、固化劑為3.5 kg、骨材用量為1375 kg。28天之破裂模數對抗壓強度比R/fc在0.18~0.27之間，平均為0.22，較一般混凝土的0.15左右高。28天透水係數k值介於0.66~2.41 cm/sec之間，皆超過建研所建議透水性鋪面之基準值0.01 cm/sec。28天孔隙率n值在18.5%~32.5%之間，皆大於基準值15%。

關鍵字

透水混凝土 ； 氣冷高爐石 ； 透水係數 ； 孔隙率 ； 抗壓強度

並列摘要

This study used China Steel Corporation (CSC) byproduced air-cooled blast furnace slag as aggregate material in the making of pervious concrete. The pervious concrete specimens were built according to respective water-cement ratios W/C ranged from 0.37 to 0.49, whilst aggregate particle size was between 4.8~19.1 mm. Tamping tools were two steel rods, one with 5 cm diameter round bottom, 2 cm thickness and the other with 5×5 cm square bottom, 2 cm thickness, were used to impact cylindrical and beam specimens respectively. The specimens were made by the same degree of impacting, and were performed the compressive strength, flexural strength, permeability coefficient, and porosity tests. Hopefully, the W/C of maximum strength concrete was found, and the requirements of permeability and water retention were satisfied as well. Test results showed that, both the 28 day maximum compressive strength fc and maximum modulus of rupture R occurred at W/C=0.48. The values were fc=171.4kgf/cm2 and R=41.1kgf/cm2. The mix for this specific W/C was 350 kg cement, 160 kg water, 3.5 kg curing agent and 1375 kg slag aggregate. The ratio of the 28 day compressive strength to modulus of rupture R/fc were between 0.18~0.27, averaged at 0.22, higher than that of normal concrete about 0.15. The permeability coefficient k values ranged between 0.66~2.41 cm/sec, larger than the criteria value 0.01 cm/sec proposed by Architecture and Building Research. The n values ranged between 18.5%~32.5%, also larger than the criteria value 15%.

並列關鍵字

pervious concrete ； air-cooled blast furnace slag ； permeability coefficient ； porosity ； compressive strength

參考文獻

6.行政院公共工程委員會，2001，「公共工程高爐石混凝土使用手冊」，台北，第1、7-8頁。

11.簡婉芸，2007，透水性鋪面對基地保水量敏感度之分析，碩士論文，國立中央大學，土木工程研究所，桃園，第5頁。

參考文獻

1.許晃雄、吳宜昭、周佳、陳正達、陳永明、盧孟明，2011，「臺灣氣候變遷科學報告」，中央研究院環境變遷研究，台北，第1頁。

2.吳政松，2005，透水鋪面對工程環境之影響效益分析，碩士論文， 國立中央大學，土木工程研究所，桃園，第1-2、129、169頁。