Effects of Pozzolans and Nano Bentonite on Properties of Grout

Document Type : Research Article

Authors

Department of Civil Engineering, Isfahan University of Technology, Isfahan, Iran.

Abstract

Cement grouts have extensive use in the repairing of cracks in structural and non-structural concrete and masonry, soil stabilization, etc. but for some applications, they need some modification in properties. Laboratory studies on the properties of cement grouts and the modification of these properties can pave the way for the greater use of these materials in applications such as the sealing of leachates of dangerous wastes buried at low depths, filling cracks in concrete bodies, etc. This study investigated the effect of silica fume, nano silica, nano bentonite, and superplasticizer on the physical and chemical properties of cement grout. For this purpose, 36 mixed designs in two separate groups for silica fume and nano silica were created. Then, the properties of fresh and hardened grout including flowability, bleeding, and 7, 28, and 90-day compressive strength were measured. The results showed that while nano bentonite and nano silica are effective in reducing bleeding, silica fume has a greater effect on this phenomenon. The greatest strength improvement was observed in the design containing silica fume and nano bentonite (CSB). While nano bentonite alone does not significantly improve the compressive strength of the grout, its combination with silica fume and nano silica has a notable positive impact on the compressive strength and bleeding of this mixture.

Keywords

Main Subjects


[1] U. Müller, L. Miccoli, P. Fontana, Development of a lime based grout for cracks repair in earthen constructions, Construction and Building Materials, 110 (2016) 323-332.
[2] M.j. Karimlou, Reinforcement and Repair of Damaged Structures with Expandable Grout and Experimental Study of the Effect of Aquifer Water in Zahedan on Compressive Strength of Grouts, National Conference on Civil Engineering and Sustainable Development, Khavaran Institute of Higher Education, Mashhad, February 2013, In Persian.
[3] W. Zhang, S. Li, J. Wei, Q. Zhang, R. Liu, X. Zhang, H. Yin, Grouting rock fractures with cement and sodium silicate grout, Carbonates and Evaporites, 33 (2018) 211-222.
[4] S. Mohajerani, A. Baghbanan, R. Bagherpour, H. Hashemolhosseini, Grout penetration in fractured rock mass using a new developed explicit algorithm, international journal of Rock Mechanics and Mining Sciences, 80 (2015) 412-417.
[5] W. Sui, J. Liu, W. Hu, J. Qi, K. Zhan, Experimental investigation on sealing efficiency of chemical grouting in rock fracture with flowing water, Tunnelling and Underground Space Technology, 50 (2015) 239-249.
[6] M.H. Mohammed, R. Pusch, S. Knutsson, Study of cement-grout penetration into fractures under static and oscillatory conditions, Tunnelling and Underground Space Technology, 45 (2015) 10-19.
[7] Q. Xue, J.-s. Li, L. Liu, Experimental study on anti-seepage grout made of leachate contaminated clay in landfill, Applied Clay Science, 80 (2013) 438-442.
[8] P. Spooner, G. Hunt, V. Hodge, P. Wagner, Compatibility of grouts with hazardous wastes. Final report, JRB Associates, Inc., McLean, VA (USA), 1984.
[9] A. Mardani-Aghabaglou, G.İ. Sezer, K. Ramyar, Comparison of fly ash, silica fume and metakaolin from mechanical properties and durability performance of mortar mixtures viewpoint, Construction and Building Materials, 70 (2014) 17-25.
[10] F.N. Okoye, S. Prakash, N.B. Singh, Durability of fly ash based geopolymer concrete in the presence of silica fume, Journal of Cleaner Production, 149 (2017) 1062-1067.
[11] M. Badv, H. Ali Ashrafi, Laboratory Evaluation of Geotechnical Properties and Environmental Geosynthesis of Sand-Bentonite Compounds for Use in Landfills, Journal of Civil and Environmental Engineering Tabriz, 5(2015) 13-23, In Persian.
[12] J. Wiszniowski, J. Surmacz-Gorska, D. Robert, J.-V. Weber, The effect of landfill leachate composition on organics and nitrogen removal in an activated sludge system with bentonite additive, Journal of environmental management, 85(1) (2007) 59-68.
[13] S. Kazemian, A. Prasad, B.B. Huat, V. Ghiasi, S. Ghareh, Effects of cement–sodium silicate system grout on tropical organic soils, Arabian Journal for Science and Engineering, 37 (2012) 2137-2148.
[14] M.J. Shannag, High-performance cementitious grouts for structural repair, Cement and concrete research, 32(5) (2002) 803-808.
[15] M. Rollins, Sealing properties of bentonite suspensions, Clays and Clay Minerals, 16 (1969) 415-423.
[16] W.-H. Huang, Improving the properties of cement–fly ash grout using fiber and superplasticizer, Cement and concrete research, 31(7) (2001) 1033-1041.
[17] W.-H. Huang, Properties of cement-fly ash grout admixed with bentonite, silica fume, or organic fiber, Cement and Concrete Research, 27(3) (1997) 395-406.
[18] M. Mahmoud, M. Ramadan, K. Pullen, M.A. Abdelkareem, T. Wilberforce, A.-G. Olabi, S. Naher, A review of grout materials in geothermal energy applications, International Journal of Thermofluids, 10 (2021) 100070.
[19] Y. Sun, G. Li, N. Zhang, Q. Chang, J. Xu, and J. Zhang, Development of ensemble learning models to evaluate the strength of coal-grout materials, 31(2021), 153-162.
[20] O. Tan, A.S. Zaimoglu, S. Hinislioglu, S. Altun, Taguchi approach for optimization of the bleeding on cement-based grouts, Tunnelling and underground space technology, 20(2) (2005) 167-173.
[21] O. Tan, G. Gungormus, A.S. Zaimoglu, Effect of Bentonite, Fly Ash and Silica Fume cement injections on uniaxial compressive strength of granular bases, KSCE Journal of Civil Engineering, 18 (2014) 1650-1654.
[22] H. Ghyasian, M. Salehi dobakhshari, Investigation of the Effect of Bentonite and Fly ash in Reducing the Bleeding of Cement Slurries, 8th International Congress of Civil Engineering Shiraz University, 5(2009) 21-23 In Persian.
[23] W.H. Grant, J.M. Rutledge, C.A. Gardner, Quality of bentonite and its effect on cement-slurry performance, SPE production engineering, 5(04) (1990) 411-414.
[24] K. Benyounes, A. Benmounah, Effect of bentonite on the rheological behavior of cement grout in presence of superplasticizer, International Journal of Civil, Architectural, Structural and Construction Engineering, 8(11) (2014) 1095-1098.
[25] R. Fernández, A.I. Ruiz, J. Cuevas, Formation of CASH phases from the interaction between concrete or cement and bentonite, Clay Minerals, 51(2) (2016) 223-235.
[26] S. Haney, Investigation of the Effects of Bentonite in Cement-Bentonite Grouts Used for Monitor Well Completion, 2015. [26] S. Haney, Investigation of the Effects of Bentonite in Cement-Bentonite Grouts Used for Monitor Well Completion, 2015.
[27] M. Farzi, J. Ahadian, The Effect of Mixing Method on the Permeability Changes of Cement—Bentonite, European Online Journal of Natural and Social Sciences: Proceedings, 3(3 (s)) (2014) 8-16.
[28] BS EN1170, The British Standards Institution, Precast concrete products-Test method for glass-fibre reinforced cement-Part 5, Measuring bending strength complete bending test method, 998.
[29] H. Li, M.H. Zhang, and J.P. O. u, Abrasion Resistance of Concrete Containing Nano-Particle for Pavement, 260(2006) 1262-1266.
[30] ASTM C 939, Standard Test Method for Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method), American Society for Testing and Materials, USA, 2002.
[31] ASTM C 940, Standard Test Method for Expansion and Bleeding of Freshly Mixed Grouts for Preplaced-Aggregate Concrete in the Laboratory, American Society for Testing and Materials, USA, 2003.
[32] ASTM C 109, Standard Test Method for Compressive Strength of Hydraulic Cement Mortars, American Society for Testing and Materials, USA, 2002.
[33] B. Zhang, H. Tan, W. Shen, G. Xu, B. Ma, X. Ji, Nano-silica and silica fume modified cement mortar used as Surface Protection Material to enhance the impermeability, Cement and Concrete Composites, 92 (2018) 7-17.
[34] Nuclear Waste Management Organization of Japan, Science and Technology Department, Japan, 200.