Farklı kür sıcaklıkları ve kür koşullarının ince taneli çimento ile enjeksiyon yapılmış kum zeminlerin permeabilite katsayısına etkisi

Yıl 2022, , 1155 - 1168, 28.02.2022

Eyubhan Avcı , Emre Deveci , Aydın Gökçe

https://doi.org/10.17341/gazimmfd.900487

Öz

Bu deneysel çalışmada farklı kür sıcaklıkları ve farklı kür koşullarının ince taneli çimento ile enjeksiyon yapılmış kum numunelerin permeabilite katsayısına etkisi araştırılmıştır. Deneylere farklı Su/Çimento (S/Ç) oranlarında hazırlanmış ince taneli çimento süspansiyonlarının reolojik özelliklerinin (sedimentasyon, viskozite ve katılaşma süresi) belirlenmesi deneyleri ile başlanmıştır. Reolojik özellikler belirlendikten sonra S/Ç oranları 1,5, 1,8, 2,1 ve 2,5 olan ince taneli çimento süspansiyonları ile farklı gradasyonda ve %30 rölatif sıkılıkta hazırlanmış kum numunelere enjeksiyon deneyleri yapılmıştır. Enjeksiyon deneylerinde başarılı olan numuneler farklı kür sıcaklıkları ve farklı kür koşullarında bekletilerek 3, 7, 14, 28, 56 ve 120. günlerde düşen seviyeli permeabilite deneyleri yapılmıştır. İnce taneli çimento ile enjeksiyon yapılmış ve kür tankında bekletilmiş olan numunelerin permeabilite katsayıları zamana bağlı olarak azalırken, açık ortamda bekletilen numunelerin permeabilite katsayıları zamana bağlı olarak artmıştır. Sıcaklığın artması kür tankında bekletilen numunelerin permeabilite katsayısını artırırken, açık ortamda bekletilen numunelerin permeabilite katsayısını azaltmıştır. İnce taneli çimento ile enjeksiyon yapılmış ve açık ortamda bekletilmiş olan numunelerin permeabilite katsayı değerleri kür tankında bekletilmiş olan numunelerin permeabilite katsayı değerlerinden yüksek çıkmıştır. Yapılan deneysel çalışmalar farklı kür süresi ve sıcaklığının ince taneli çimento ile enjeksiyon yapılmış kum numunelerin permeabilite katsayısını etkilediğini göstermiştir.

Anahtar Kelimeler

Kür sıcaklığı, kür koşulları, ince taneli çimento

Kaynakça

• Karol, R. H., Chemical grouting and soil stabilization, Marcel Dekker, Brunswick, NJ 2003.
• Tunçdemi̇r, F ., Kompaksiyon Enjeksiyonuna Teorik Ve Pratik Yaklaşımlar, Teknik Dergi, 18(86), 4069-4080, 2007.
• Zebovitz, S., Krizek, R. J. and Atmatzidis, D. K., Injection of fine sands with very fine cement grout, J. Geotech. Eng., 115(2), 1717–1733, 1989.
• Nguyen, V. H., Remond, S., and Gallias, J. L., Influence of cement grouts composition on the rheological behavior, Cement and Concrete Research, 41(3), 292-300, 2011.
• Avci, E., Silica Fume Effect on Engineering Properties of Superfine Cement–Grouted Sands, Journal of Materials in Civil Engineering, 31(11), 04019269-1-13, 2019.
• Perret, S., Palardy, D., and Ballivy, G., Rheological behavior and setting time of microfine cement-based grouts, ACI Mater. J., 97(4) 472–478, 2000.
• Håkansson, H., Hässler, L., and Stille, Rheological properties of microfine cement grouts, Tunnelling and Underground Space Technology, 7(4), 453-458. 1992.
• Schwarz, L. G., and Krizek, R. J., Effect of preparation technique on permeability and strength of cement-grouted sand, Geotechnical Testing J., 17(4), 434–443, 1994.
• Zhang, S., Qiao, W., Li, Y., Xi, K., and Chen, P., Effect of Additives on the Rheological and Mechanical Properties of Microfine-Cement-Based Grout, Advences Material Science and Engineering, 2019 1-10, 2019
• Tekin, E., Rheological Properties of Micro Fine Cement (Rheocem 900) Grouts, Journal of the Faculty of Engineering and Architecture of Gazi University, 26 (4), 777–785, 2011.
• Tekin, E., Akbaş, S. O., Estimation of Groutability of Granular Soils With Cement-Based Grouts Using Discriminatn Analysis, Journal of the Faculty of Engineering and Architecture of Gazi University, 25 (3), 625–633, 2010.
• Warner, J., “Soil solidification with ultrafine cement grout. Grouting and ground treatment” Proceedings of the third International Conference on Grouting and Ground, New Orleans, USA, 2003.
• Markou, I. N., and Droudakis, A. I., Shear Strength of Microfine Cement Grouted Sands, Ground Improvement, 166(3), 177-186, 2013.
• Christodoulou, D., Droudakis, A., Pantazopoulos, I. A., and Atmatzidis, D. K., “Groutability and Effectiveness of Microfine Cement Grouts” Proceedings of the 17th International Conference on Soil Mechanics & Geotechnical Engineering, Egypt, 2009.
• Pantazopoulos, I. A., and Atmatzidis, D. K., Dynamic properties of microfine cement grouted sands, Soil Dynamics and Earthquake Engineering, 42 17–31, 2012.
• Hashimoto, K., Nishihara, S., Oji, S., Kanazawa, T., Nishie, S., Seko, I., Hyodo, T., Tsukamato, Y., Field testing of permeation grouting using microfine cement, Ground Improvement, 169(2), 134-142, 2016.
• Chen, J., Hagan, P. C., and Saydam, C., Shear behaviour of a cement grout tested in the direct shear test, Construction and Building Materials, 166, 271-279, 2018.
• Jaforpour, P., Moayed, R. Z., and Kordnaeij, A., Yield stress for zeolite-cement grouted sand, Construction and Building Materials, 247(30), 1-12, 2020.
• Mirza, J., Saleh, K., Langevin, M. A., Mirza, S., Aamer, M., Bhutta, R., and Tahir, M. M., Properties of microfine cement grouts at 4 °C, 10 °C and 20 °C, Construction and Building Materials, 47, 1145-1153, 2013.
• ASTM D6913M-17, Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2017.
• ASTM D2487-17e1, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2017
• ASTM D4253-16e1, Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2016.
• ASTM D4254-16, Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2016.
• ASTM C940-16, Standard test method for expansion and bleeding of freshly mixed grouts for preplaced aggregate concrete in the laboratory, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2016.
• ASTM D2196-18e1, Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2018.
• ASTM C191-19, 21. Standard Test Method for Time of Setting of Hydraulic Cement by Vicat Needle, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2019.
• ASTM D 2434-68, Standard test method for permeability of granular soils (constant head), American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2002.
• ASTM 5856-95, Standard test method for measurement of hydraulic conductivity of porous material using a rigid-wall, American Society for Testing and Materials, ASTM International, West Conshohocken, Pa, 2002.
• Eklund, D. and Stille, H., Penetrability due to filtration tendency of cement based grouts, Tunneling and Underground Space Technology, 23(4), 389-398, 2008.
• Markou, I., Christodoulou, D., and Atmatzidis, D., “Effect of sand gradation on the groutability of cement suspensions.” Proceedings of the 4th Int. Conf. on Grouting and Deep Mixing, ASCE, New Orleans, 2012.
• Burwell, E. B., Cement and clay grouting of foundations: Practice of the corps of engineering, Journal of the Soil Mechanics and Foundations Division, 84(1), 1-22, 1958.
• Huang, C. L., Fan, J. C., Liao, K. W, Lien, T. H., A Methodology to Build a Groutability Formula via a Heuristic Algorithm, KSCE Journal of Civil Engineering, 17, 106-116, 2013.
• Akbulut, S., Sağlamer, A., Daneli Zeminlerde Enjeksiyon Basıncı ve Dane Çapının Enjeksiyon Edilebilirlik Açısından Etkileri, Teknik Dergi, 14,(68), 2985-2995, 2003.
• Schwarz, L. G., and Chirumalla, M., “Effect of injection pressure on permeability and strength of microfine cement grouted sand” Grouting for Ground Improvement: Innovative Concepts and Applications Vol. 1, Geo-Denver 2007, ASCE, Colorado, 2007.
• De Paoli, B., Bosco, B., Granata, R., and Bruce, D. A. “Fundamental observations on cement based grouts (2): Microfine cements and the Cemill1 process” Proceedings of the Grouting, Soil Improvement and Geosynthetics, New Orleans, 1992.