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標題: 混凝土含水狀態之量測與超音波波速關係之建立
Measurement of concrete moisture content and development of the relationship between moisture content and ultrasonic pulse velocity
作者: 詹智捷
Chieh, Chan-Chih
關鍵字: ultrasonic pulse velocity;超音波波速
出版社: 土木工程學系所
引用: 1. ASTM C 805, "Standard Test Method for Rebound Number of Hardened Concrete," Annual Book of ASTM Standards, Vol. 04.02. 2. ASTM C 803, "Standard Test Method for Penetration Resistance of Hardened Concrete," Annual Book of ASTM Standards, Vol. 04.02. 3. ASTM C 1150, "Standard Test Method for the Break-Off Number of Concrete," Annual Book of ASTM Standards, Vol. 04.02. 4. ASTM C 900, "Standard Test Method for Pullout Strength of Hardened Concrete," Annual Book of ASTM Standards, Vol. 04.02. 5. ASTM C 597, "Standard Test Method for Pulse Velocity Through Concrete," Annual Book of ASTM Standards, Vol. 04.02. 6. V.R. Sturrup, F.J. Vecchio and H. Caratin, “Pulse Velocity as a Measure of Concrete Compressive Strength”, In Situ/Nondestructive Testing of Concrete, ACI SP-82, 1984; pp. 201-227. 7. ASTM C 1074, "Standard Practice for Estimating Concrete Strength by the Maturity Method," Annual Book of ASTM Standards, Vol. 04.02. 8. ASTM C 873, "Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds," Annual Book of ASTM Standards, Vol. 04.02. 9. ACI Committee 228 Report (1996). In-Place Methods to Estimate Concrete Strength, ACI Standard ACI 228.1R-95, 1996 10. Brian, B. Hope and Paul, M. Hewitt (1985).“Progressive Concrete Mix Proportioning”, ACI Materials Journal, Vol82, No.3, May-June 1985,pp.350-356. 11. Kennedy, Charles T. (1940).“The Design of Concrete Mixes”, ACI Materials Journal, Vol36, 1940, pp.373-400. 12. Leif Berntsson, Satish Chandra, and Tomas Kutti (1990). “Principles and Factors Influencing High-Strength Concrete Production”, Concrete International,Vol.12, No.12, December 1990, pp.59-62. 13. Price, W.F. and Hynes, J.P. (1996).“In-Situ Strength Testing of High Strength Concrete”, Magazine of Concrete Reseach, Vol.48, No.176, Sept.1996,pp.189-197. 14. Anderson David, A. and Seals Roger, K. (1981).“Pulse Velocity as a Predictor of 28- and 90-Day Strength”, ACI Materials Journal, Vol.78, No.2,March-April 1981, pp.116-122. 15. Pessiki Stephen and Johnson, Matthew R. (1996).“Nondestructive Evaluation of Early-age Concrete Strength In Plate Structures by the Impact-Echo Method,” ACI Materials Journal, Vol. 93, No.3, 1996, pp.260-271. 16. Kaplan, M.F. (1958).“Compressive Strength and Ultrasonic Pulse Velocity Relationships for Concrete in Columns”, Journal of ACI, Vol.54, No.8,February 1958, pp. 675-688. 17. Sturrup, V.R., Vecchio, F.J., and Caratin, H. (1984).“Pulse Velocity as a Measure of Concrete Compressive Strength”, In Situ/Nondestructive Testing of Concrete, ACI SP-82, 1984; pp. 201-227 18. Wu, T.T., and Lin, T. F. (1998).“The Stress Effect on the Ultrasonic Velocity Variation of Concrete under Repeated Loading”, ACI Materials Journal,Vol.95, No.5, September-October 1998, pp.519-524. 19. Popovics, S., Rose, L. Joseph, and Popovics, John S. (1990b).“The Behavior of Ultrasonic Pulses in Concrete,” Cement and Concrete Reaserch, Vol. 20,No.2, 1990, pp.259-270. 20. Pessiki, P. S., and Carino, N.J. (1988).“Setting Time and Strength of Concrete Using the Impact-Echo Method”, ACI Materials Journal, 1988; Vol.85,No.5, pp.389-399. 21. Andersen Johannes and Nerenst Poul (1952). Wave Velocity in Concrete, ACI Journal, Proc. Vol.48, Apr. 1952, pp. 613-636. 22. Jones, R. (1954).“Testing of Concrete by an Ultrasonic Pulse Technique”,RILEM Int. Symp. On Nondestructive Testing of Materials and Structures,Paris. Vol.1, Paper No.A-17, January 1954, pp.137, RILEM Bull. No.19,2nd part, November 1954. 23. Kaplan, M.F. (1952).“Effects of Incomplete Consolidation on Compressive and Flexural Strength, Ultrasonic Pulse Velocity, and Dynamic Modulus of Elasticity of Concrete”, Journal of ACI, Vol.56, No.9, March, 1952, pp.853-867. 24. Popovics, S. (1987).“A Hypothesis Concrete the Effects of Macro-Porosity on Mechanical Properties of Concrete”, Fracture of Concrete and Rock,SEM-RILEM International Conference, June 1987,Houston Texas,pp.170-174. 25. Komloš, K., Popovics, S., Nürnbergerová, T., Babál, B. and Popovics, J.S. (1996).〝Ultrasonic Pulse Velocity Test of Concrete Properties as Specified inVarious Standards,〞Cement and Concrete Composites Volume: 18, June,1996, pp. 357-364. 26. Lin, Y., Kuo, S.F., Hsiao, C., and Lai, C.P., “Investigation of Pulse Velocity-Strength Relationship of Hardened Concrete,” ACI Materials Journal, Vol. 104, No. 4, 2007, pp. 344-350. 27. Lin, Y.C., Lin, Y., Lin Y.F., “Establishment of the relationship between the plus velocity and strength of concrete at various ages,” 4th International Conference on Construction Materials, compact disc, S1-3-4. 28. 島川正憲 著,賴迪陽 譯 (1982)“超音波工學理論實務”,復漢出版社,1982年。 29. 黃啟貞 (1980)“超音波檢測試驗法”,中華民國非破壞檢測協會(上冊),1980年。
本論文主要目的是希望能建立混凝土(期齡7、14、21、28天)導電值(D)與飽和度(SD)間之關係,及超音波波速比與飽和度(SD)間之關係,本論文針對28天以前之混凝土進行波速-強度關係之探討。本研究採用混凝土配比為水泥糊36%及粗粒料含量為1180 kg/m3及變化4種水灰比,試體種類有直俓10cm,高20cm之圓柱試體16顆,另外為便於含水量測定儀進行量測,灌製15cm立方型試體,每個配比製作4顆,兩類試體均於澆置後放入養護池。並於7、14、21、28天,對立方型試體進行含水率與波速變化之測定,於取出養護池後以烘箱對其進行烘乾,烘箱溫度保持於105°±5°C,總歷時為72小時,圓柱試體則於7、14、21、28天進行抗壓試驗。研究結果顯示以超音波法量測混凝土之波速,若未考慮其飽和度之變異,則其預估混凝土強度之差異隨水灰比越高,影響越顯著。

The purpose of this thesis is to establish the relationship between concrete conductivity coefficient (D) and the saturation degree (SD), and the relationship between the ultrasonic pulse velocity ratio (V/VSSD) and the saturation degree (SD). The thesis investigates the relationship between the ultrasonic pulse velocity and the strength of concrete at various ages prior to 28 days. First, the specimens used in the studies were made of concrete with a paste content of 36% and coarse aggregate contents (1180kg/m3), and the constituents of the specimens varied in different water-cement ratios. Four concrete mixtures were considered. Sixteen cylindrical specimens and four cubic specimens were constructed for each concrete mixture and cured in water at 23°C. At ages of 7、14、21、28 days, the cubic specimens were used to measure the concrete conductivity coefficient and the pulse velocity under different moisture conditions. The variation in moisture content was made by drying the concrete specimens in an oven at a temperature of 105°±5°C with various drying times upto 72 hours, The cylindrical specimens were used to perform uniaxial compression tests at ages of 7、14、21and 28 days. Experimental results show that the use of ultrasonic pulse velocity to estimate the strength of concrete must consider the influence of the moisture content on the pulse velocity. The influence is much more significant for concrete with relatively high water-cement ratio.
其他識別: U0005-0508201015541400
Appears in Collections:土木工程學系所

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