Experimental Study of Bellows Duct Grouting Compactness with Quantitative Detection

Abstract:

In order to quantitatively detect the compactness of bellows duct grouting, by studying time-histories relation curve forming by ultrasonic wave transmitting in different thicknesses concrete samples. We get the acoustic time rule after ultrasonic passed through different compactness bellows duct. At the same time, establishing empty hole estimation model corresponding to the concrete samples and providing theoretical basis for judging porosity and predicting the grouting quality in the bellows duct. Meanwhile, dividing the bellows duct into five degrees complete compactness, 3/4 compactness, 1/2 compactness, 1/4 compactness, empty by setting up defects in the bellows duct, and then embedding them in concrete slab to do ultrasonic detection. The detection result shows that ultrasonic detection method can effectively quantitive estimate the grouting quality of prestressed bellows duct with establishing empty hole estimation model.

• Periodical: Applied Mechanics and Materials (Volumes 716-717)
• Pages: 322-327
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.716-717.322
• Online since: December 2014
• Authors: Feng Chu*, Yuan Cao, Guang Zhi Qi, Lei Gao
• Keywords: Empty Hole Estimation Model, Grouting Quality, Prestressed Bellows Duct, Quantitive Estimation, Ultrasonic Wave

References

[1] C. Colla. Improving the Accuracy of Impact-Echo in Testing Post-Tensioning Ducts[J]. Review of Quantitative Nondestructive Evaluation, 2003, (22): 1185-1192.

DOI: 10.1063/1.1570267

[2] Chundong Yang. The Application of Time-frequency Analysis Technique in the Quality Detection of Bridge Prestressed Pore Grouting [J]. Sichuan Building Scientific Research. 2012. 38 (4) . 329-333.

[3] Martyn Hill, John Mchugh, and John D. Turner. Cross-Sectional Modes in Impact-Echo Testing of Concrete Structures[J]. ACI Journal of Structural Engineering, 2000, 126(2): 228-234.

DOI: 10.1061/(asce)0733-9445(2001)127:5(597)

[4] Odile Abraham, Phillippe Cote. Impact-Echo Thickness Frequency Profiles for Detection of Voids in Tendon Ducts[J]. ACI structural Journal, 2002, 99(3): 239-247.

DOI: 10.14359/11907

[5] Pan Jiang. The Experimental Study of Ultrasonic Testing Prestressed Bellows Pore Grouting Quality [D]. Northeast: Northeast Forestry University. 2012: 3-7.

[6] R. Muldoon, A . Chalker, M.C. Forde, M. Ohtsu, and F. Kunisue. Identifying voidsin plastic ducts in post-tensioning prestressed concrete members by resonant frequency of impact–echo SIBIE and tomography[J]. Construction & Building Materials. 2007, 21(3): 527-537.

DOI: 10.1016/j.conbuildmat.2006.04.009

[7] Wei Wang and so on. Detecting the Quality of Bellows Grouting with Impact-echo Method [R]. Concrete, 2010, 247(5): 134-137.

[8] Xiangfeng Xu. Research on Duct Grouting Performance Test and Construction Quality[D]. Dongnan University, 2005. 1-9.

[9] Xianyan Zhou & Yunfeng Xiao. The Research of Detecting the Quality of Steel Concrete with Ultrasonic Method and Impact-echo Method. The Journal of Central South Forestry College [J]. 2006, 26(6): 44-48.

[10] Yongjie Tan, Bo Xu etc. Void Detection Test of CFST based on Ultrasonic Measurement Method[J]. Architecture and Engineering Paper. 2012. 29(2). 103-108.