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Estimate of Concrete Strength at Various Ages Using the Ultrasounic Pluse Velocity
|關鍵字:||Ultrasounic Pluse Velocity;超音波速;early age;Concrete;Strength;早齡期;混凝土;強度||出版社:||土木工程學系所||引用:||1. 郭世芳，「探討超音波速度與混凝土抗壓強度之關係與其應用」，國立中興大學土木工程學系博士論文，民國九十六年七月 2. 賴朝鵬，「混凝土材料組成對其流動性質與波傳行為之影響」，國立中興大學土木工程學系博士論文，民國八十八年六月 3. 干裕成，「劣化混凝土材料應力波傳速度與E值、老化時程及抗壓強度之關係」行政院原子能委員會委託研究計畫研究報告，民國92年12月。 4. 楊仲家,黃然,葉為忠, “以微觀力學探討粗骨材對高性能混凝土之影響”, 第三屆結構工程研討會, 1996,pp.1785-1793。 5. 邱欽賢，“水工結構混凝土之抗沖蝕性”，國立中興大學土木工程學系碩士論文，民國91年6月。 6. 劉玉雯，“應用於水工結構表層之高性能混凝土磨損行為”，國立中興大學土木工程學系博士論文，民國95年1月。 7. 沈進發，”混凝土品質控制”，第三版，民國72年9月，第7-35頁。 8. 林炳炎，“飛灰與飛灰混凝土”，現代營建，民國82年7月 9. 黃兆龍，“混凝土性質與行為”，詹氏書局，民國86年8月。 10.島川正憲 著，賴迪陽 譯，「超音波工學理論實務」，復漢出版社，民國71年。 11.黃啟貞，“超音波檢測試驗法”，中華民國非破壞檢測協會（上冊），民國69年。 12.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 13. T.R. Naik and V.M. Malhotra, “The Ultrasonic Pulse Velocity Method”, Chapter 7 in CRC Handbook on Nondestructive Testing of Concrete, V.M. 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Kaplan, “Compressive Strength and Ultrasonic Pulse Velocity Relationships for Concrete in Columns”, Journal of ACI, Vol.54, No.8, February 1958,pp.675-688. 50. P. S. Pessiki and N.J. Carino, “Setting Time and Strength of Concrete Using the Impact-Echo Method”, ACI Materials Journal, 1988; Vol.85, No.5, pp.389-399. 51. H. W. Chung and K.S. Law, “Diagnosing in Situ Concrete by Ultrasonic Pulse Technique”, Concrete International, Vol.13, No.10,1983, pp.42-49. 52. F. Sellect Scott, N. Landis Eric, L. Peterson Michael, P. Shah Surendra and D. Achenbach Jan, “Ultrasonic Investigation of Concrete with Distributed Damage”, ACI Materials Journal, Vol.95, No.1, January-February 1998, pp.27-36. 53. Wimal Suaris and Viraj Fernando, “Ultrasonic Pulse Attenuation as a Measure of Damage Growth during Cyclic Loading of Concrete”, ACI Materials Journal, May-June 1987, Vol.84, pp.185-193. 54. T.T. Wu and T. F. Lin, “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. 55. Andersen Johannes and Nerenst Poul, “ Wave Velocity in Concrete”, Journal of ACI, Vol.48, No.8, April 1952,pp.613-636. 56. R. Jones, “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. 57. M.F. Kaplan, “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. 58. Sandor Popovics, “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. 59. ASTM C 597 (1992), "Standard Test Method for Pulse Velocity Through Concrete," Annual Book of ASTM Standards, Vol. 04.02. 60. ASTM C 1383 (1998). "Standard Test Method for Measuring the P-Wave Speed and the Thickness of Concrete Plates Using the Impact-Echo Method" Annual Book of ASTM Standards, Vol. 04.02., 1998. 61. Malhotra, V.M., /Editor et al. (1984).“In Situ/Nondestructive Testing of Concrete”, ACI SP-82, 1984. 62.Komloš, K., Popovics, S., Nürnbergerová, T., Babál, B. and Popovics, J.S. (1996).〝Ultrasonic Pulse Velocity Test of Concrete Properties as Specified in Various Standards,〞Cement and Concrete Composites Volume: 18, June, 1996, pp. 357-364.||摘要:||
The purpose of this thesis is to discuss the relationship between the wave velocity and the compressive strength growth rates of concrete at various ages. At the start, the relationship between the ultrasonic pulse velocity (UPV) and the compressive strength growth rates is established based on the previous test data. All the tested specimens had a constant cement paste volume ratio (Vpaste) of 36%. The variables in mixture proportion of the tested specimens included five water-cement ratios of 0.3, 0.4, 0.5, 0.6, and 0.7 and three volume ratios of fine aggregate to total aggregate (30%, 45%, and 60%). Those specimens were tested at 1, 3, 7, 14 and 28 days. The experimental data were used to establish the relationship curve between the UPV and the compressive strength growth rates. Subsequently, verification program is carried out to investigate if the established relationship is suitable for other concrete specimens with different mixture proportions. The specimens were made of concrete with cement paste volume ratios of 36% and 42%, the constituents of the specimens varied in different water/cement ratios (w/c=0.4, 0.5, 0.6 and 0.7). The volume ratio of fine aggregate to total aggregate was 40%. These specimens were tested at 1, 4, 7, 14 and 28 days. For each test, the UPV and impact-echo velocity (IEV) were measured before compressive test.
Experimental results show that the most individual difference between the estimated strength by UPV and the measured strength of concrete are less than 10%. It has been verified that the established relationship curve is suitable for concrete having different mixture proportions with same cement paste content (Vpaste=36%). However, the estimate of concrete strength by UPV of the cement paste is 42% has greater variation than cement paste is 36%. Therefore, the effect of cement paste on the relationship between the wave velocity and the compressive strength growth rates of concrete at various ages should be considered in future research.
In addition, IEV is smaller than UPV of the same specimen at same age and between both is not related obviously. As a result, there is a need to establish its own relationship between IE-V and the compressive strength growth rates. A small difference between each experimental data and the best-fit curve of the IEV-strength growth rate relationship is found. The use of the measured IEV to predict compressive strength of concrete is suitable.
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