焚化爐底渣應用於透水混凝土之研究

Study on Incinerator Bottom Ash Used for Pervious Concrete

林正大(Jeng-Da Lin)

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(2015年)

https://doi.org/10.6346/NPUST.2015.00019

摘要

本文以映誠公司提供焚化爐底渣作為透水混凝土骨材，添加強笙工程有限公司之固化劑，製作水灰比W∕C=0.41~0.46之透水混凝土試體，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#westeur024#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，尋求最大強度之混凝土水灰比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＝0.42之配比，其值各為fc＝64.3 kgf/cm2和R＝22.9 kgf/cm2。該配比之水泥用量為350 kg、拌和水為140 kg、固化劑為3.5 kg、骨材用量為1126 kg。7天對28天抗壓強度比fc7/fc28和破裂模數比R7/R28，平均值皆為0.93，故固化劑具有早強作用。28天之破裂模數對抗壓強度比R/fc在0.22~0.47之間，平均為0.37，較一般常重混凝土約0.15高。28天透水係數k值介於1.3~3.4 cm/sec之間，皆超過臺灣建築中心建議透水性鋪面之基準值0.01 cm/sec。28天n值在25%~35%之間，皆大於基準值15%。

關鍵字

透水混凝土 ； 焚化爐底渣 ； 透水係數 ； 孔隙率 ； 抗壓強度

並列摘要

This study used the incinerator bottom ash provided by Yin-Chen Corporation as aggregate and added the curing agent by Johnson Corporation in the making of pervious concrete. The pervious concrete specimens were built according to respective water-cement ratios W/C ranged from 0.41 to 0.47, 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#westeur024#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=0.42. The values were fc=64.3 kgf/cm2 and R=22.9 kgf/cm2. The mix for this specific W/C was 350 kg cement, 140 kg water, 3.5 kg curing agent and 1126 kg aggregate. Both the 7 day to 28 day compressive strength ratio fc7/fc28 and modulus of rupture ratio R7/R28 were 0.93. Therefore, the curing agent had accelerating effect in strength. The ratio of the 28 day compressive strength to modulus of rupture R/fc were between 0.22~0.47, averaged at 0.37, higher than that of normal concrete about 0.15. The permeability coefficient k values ranged between 1.3~3.4 cm/sec, larger than the criteria value 0.01 cm/sec proposed by Taiwan Architecture and Building Center. The n values ranged between 25%~35%, also larger than the criteria value 15%.

並列關鍵字

pervious concrete ； incinerator bottom ash ； permeability coefficient ； porosity ； compressive strength

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