無收縮水泥抗壓強度和伸長率之研究

本文於水泥中添加MT－903無收縮劑，製作0.28到0.46等10組不同水灰比W/C之水泥試體作試驗，以探討水泥漿之含氣量Air、單位重U、迷你坍度S和水泥試體之抗壓強度fc、烘乾密度Dd、面乾內飽和密度Ds及伸長率ΔLx對W/C或齡期t之關係。將試驗結果作迴歸分析得迴歸式：Air＝10.42(W/C)2－11.09W/C＋3.527；U＝－1265W/C＋2447；S＝－97.54(W/C)2＋91.88W/C＋4.961；fc＝－1799W/C＋1414；Dd＝－1540W/C＋2312；Ds＝－1024W/C＋2465；ΔLx＝0.0214t0.395。各迴歸式之相關係數r之絕對値皆在0.94以上，相關性甚佳。

關鍵字

無收縮水泥；水泥漿；抗壓強度；伸長率

並列摘要

The paper added MT－903 non-shrinkage agent into cement to perform tests on 10 groups of test specimens of different water cement ratio W/C from 0.28 to 0.46. The relationships between the air content Air, unit weight U, mini-slump S of cement slurry, and the compressive strength fc, oven-dry density Dd, saturated- surface-dry density Ds and elogation ΔLx of cement specimens versus W/C and/or specimen age t are discussed. A regression analysis on the test results gives regression equations: Air＝10.42(W/C)2－11.09W/C＋3.527; U＝－1265W/C＋2447; S＝－97.54(W/C)2＋91.88W/C＋4.961; fc＝－1799W/C＋1414; Dd＝－1540W/C＋2312; Ds＝－1024W/C＋2465; ΔLx＝0.0214t0.395. All the absolute values of correlation coefficient r of the regression equations are larger than 0.94. The correlations of the equations are very good.

並列關鍵字

non-shrinkage cement ； cement slurry ； compressive strength ； elongation

參考文獻

6. Garrault-Gauffient, S., and Nonat, A., 1999, “Experiment Investigation of Calcium Silicate Hydrate（C-S-H）Nucleation”, Journal of Crystal Growth, Vol. 200, pp. 565-574.

7. Clark, S. M., and Morrison, G. R., Shi, W. D., 1999, “The Use of Scanning Transmission X-Ray Microscopy for the Real-Time Study of Cement Hydration”, Cement and Concrete Research, Vol. 29, No. 6, pp. 1099-1102.

1. 張道武，2009，混凝土裂縫密度之量測方法，碩士論文，中央大學，土木工程系研究所，桃園，第1頁。