利用快速氯離子傳輸試驗探討水泥質材料中飛灰爐石對界面過渡區傳輸性質的影響

USING RAPID CHLORIDE MIGRATION TEST TO DETERMINE THE INFLUENCE OF TRANSPORT PROPERTY FOR INTERFACIAL TRANSITION ZONE IN CEMENT-BASED MATERIAL WITH FLY ASH AND SLAG

黃康訓(Kang-Shiun Huang) ； 楊仲家(Chung-Chia Yang)

《中國土木水利工程學刊》 34卷5期 (2022/09) Pp. 441-446

https://doi.org/10.6652/JoCICHE.202209_34(5).0010

摘要

由於界面過渡區（ITZ）的傳輸性質難以量化，本研究應用快速氯離子傳輸試驗量測ITZ的氯離子侵入深度，並計算ITZ的氯離子傳輸係數（電場作用下氯離子的擴散係數）。為了獲得連續型ITZ，砂漿試樣中添入圓形粒料棒（ϕ19 mm × 50 mm）。結果顯示：圓形粒料棒周遭形成連續型ITZ，ITZ具有比matrix更高的氯離子侵入深度。水泥質材料中ITZ與matrix的氯離子傳輸係數會受水膠比的影響。試樣添加飛灰與水淬高爐石，ITZ改善量分別為matrix改善量的2.4與1.5倍。

關鍵字

飛灰 ； 水淬高爐石 ； 快速氯離子傳輸試驗 ； 界面過渡區

並列摘要

The transport properties of the interfacial transition zone (ITZ) are difficult to quantify; thus, this study applies the rapid chloride migration test for measuring the chloride penetration depth of the ITZ and determining the migration coefficient (the diffusivity of chlorides under an electric field) of the ITZ. To obtain a continuous ITZ, a mortar specimen was added with a rod-shaped aggregate (φ19 mm × 50 mm). The results indicated that a continuous ITZ formed around a rod-shaped aggregate, and the ITZ had higher chloride penetration depth than the matrix. The migration coefficient of the ITZ and that of the matrix were affected by the w/b ratio for the cement-based materials. The improvement amount of ITZ was up to the 1.5 and 2.4 times that of the matrix for adding fly ash and granulated blast furnace slag, respectively.

並列關鍵字

fly ash ； granulated blast furnace slag ； rapid chloride migration test ； ITZ

參考文獻

Yang, C. C. and Su, J. K., “Approximate migration coefficient of interfacial transition zone and the effect of aggregate content on the migration coefficient of mortar,” Cement and Concrete Research, Vol. 32, No. 10, pp. 1559-1565 (2002).

Yang, C. C. and Cho, S. W., “Approximate migration coefficient of percolated interfacial transition zone by using the accelerated chloride migration test,” Cement and Concrete Research, Vol. 35, No. 2, pp. 344-350 (2005).

Yang, C. C., “On the relationship between pore structure and chloride diffusivity from accelerated chloride migration test in cement-based materials,” Cement and Concrete Research, Vol. 36, No. 7, pp. 1304-1311 (2006).

Shafikhani, M. and Chidiac, S. E., “A holistic model for cement paste and concrete chloride diffusion coefficient,” Cement and Concrete Research, Vol. 133, pp. 106049 (2020).

Zhu, X., Gao, Y., Dai, Z., Corr, D. J., and Shah, S. P., “Effect of interfacial transition zone on the Young's modulus of carbon nanofiber reinforced cement concrete,” Cement and Concrete Research, Vol. 107, pp. 49-63 (2018).