碳黑對不同密度泡沫水泥物理性質之影響

EFFECTS OF CARBON BLACK ON PHYSICAL PROPERTIES OF CEMENTITIOUS FOAMS WITH DIFFERENT RELATIVE DENSITIES

陳頵(Chun Chen) ； 黃忠信(Jong-Shin Huang)

《中國土木水利工程學刊》 34卷5期 (2022/09) Pp. 425-433

https://doi.org/10.6652/JoCICHE.202209_34(5).0008

摘要

本研究添加環保碳黑於水泥膠結材中，採用機械發泡方式製成不同相對密度之泡沫水泥試體，主要材料參數為添加碳黑比例與相對密度，分別製作含碳黑水泥膠結材、未添加碳黑泡沫水泥、含碳黑泡沫水泥等一系列不同配比設計試體。於相同日曬條件下，試驗量測不同泡沫水泥試體內部之升降溫歷程，發現泡沫水泥材料升溫幅度與添加碳黑比例及相對密度呈現非線性關係，存在一最佳添加碳黑比例與相對密度。另外，為探討添加碳黑對所製成泡沫水泥試體微結構之影響，使用相機配合影像分析軟體，分析不同配比設計泡沫水泥試體內部泡沫孔隙之分布狀態，同時，試驗量測其吸水率之變化，試驗結果發現，含碳黑低相對密度泡沫水泥試體，其吸水率較未添加碳黑者高，驗證碳黑可應用於製作新型隔熱與隔音材料。最後，TCLP檢驗結果顯示，含碳黑泡沫水泥試體所溶出之重金屬含量符合標準，實為一綠色新型營建材料。

關鍵字

碳黑 ； 相對密度 ； 泡沫水泥 ； 吸水率

並列摘要

Cementitious foams with various relative densities were made by mixing cement paste with different fractions of carbon black and by using a mechanical foaming process. The main material parameters in mixture design were carbon black percentage and relative density. A series of cement binders with carbon black, cementitious foams with and without carbon black were produced respectively. Under the same sunlight condition, the inside temperature changes of cementitious foam specimens were first measured and then compared to one another. It is found that the relationships between temperature change and carbon black percentage or relative density are nonlinear. Consequently, optimal carbon black percentage and relative density are proposed. Also, camera equipped with image-analyzing software was employed to characterize the pore size distributions of cementitious foams with and without carbon black. Meanwhile, the water absorptions of cementitious foams were tested and then compared. It is confirmed that the water absorptions of cementitious foams with carbon black are consistently higher than those without carbon black. Hence, cementitious foams are promising as thermal and sound insulators. Furthermore, TCLP measurement on cementitious foams indicates that they are green construction materials.

並列關鍵字

carbon black ； relative density ； cementitious foam ； water absorption

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