Abstract
The Polyurethane grout is an effective method used for improving the soils stabilization without disturbing the original soil structure, which is workable for construction and enhances the performance of soil compressive strength. In order to study the effect temperature, acetone rate, sodium silicate rate, mass fractal dimension of particle, and particle shape on the compressive strength. In order to lighten the workload considerably, the central composite design under response surface methodology was utilized. In this study, different content percentages of PU were injected into the modified sand and the compressive strength of specimens from the modified sand injected was determined by conducting the unconfined compression test. The results indicated that the existence of temperature, beyond which the strength has no change with the increase of temperature. And the strength of specimen increases with the increase of acetone mass ratio, over a critical value, it decreases. And that the strength of the specimen increases with sodium silicate ratio until a critical value (6%), beyond which it decreases slightly. And also the comprehensive strength of specimen is well correlated to the fractal dimension and shape of particles.
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Atzeni C, Pia G, Sanna U (2013) A geometrical fractal model for the porosity and permeability of hydraulic cement pastes. Constr Build Mater 24(10):1843–1847. https://doi.org/10.1016/j.conbuildmat.2010.04.020
Bittelli M, Campbell GS, Flury M (1999) Characterization of particle-size distribution in soils with a fragmentation model. Soil Sci Soc Am J 63(4):782–788. https://doi.org/10.2136/sssaj1999.634782x
Cao X, Lee LJ, Widya T, Macosko C (2005) Polyurethane/clay nanocomposites foams: processing, structure and properties. Polymer 46(3):775–783. https://doi.org/10.1016/j.polymer.2004.11.028
Espadas-Escalante JJ, Avilés F (2015) Anisotropic compressive properties of multiwall carbon nanotube/polyurethane foams. Mech Mater 91:167–176. https://doi.org/10.1016/j.mechmat.2015.07.006
Gao X, Huang W, Wei H, Wei Y, Zhong Y (2017) Experiment and modeling for compressive strength of polyurethane grout materials. Acta Mater Compos Sin 34(2):438–445. https://doi.org/10.13801/j.cnki.fhclxb.20160413.002
Hu XM, Wang DM, Cheng WM (2016) Effect of dosage of expandable graphite, dimethyl methylphosphonate, triethanolamine, and isocyanate on fluidity, mechanical, and flame retardant properties of polyurethane materials in coal reinforcement. INT J Min Sci Technol 26(2):345–352. https://doi.org/10.1016/j.ijmst.2015.12.023
Huang FC, Lee JF, Lee CK, Chao HP (2004) Effects of cation exchange on the pore and surface structure and adsorption characteristics of montmorillonite. Colloids Surf Physicochem Eng Asp 239(1–3):41–47. https://doi.org/10.1016/j.colsurfa.2003.10.030
Janke NC (1981) The shape of rock particles, a critical review. Sedimentology 28(5):737–738. https://doi.org/10.1111/j.1365-3091.1980.tb01179.x
Krumbein WC (1941) Measurement and geological significance of shape and roundness of sedimentary particles. Radiobiologia Radiotherapia 12(5):595–598. https://doi.org/10.1306/D42690F3-2B26-11D7-8648000102C1865D
Li LX, Sun YM, Cao B, Song HH, Xiao Q, Yi WP (2016) Preparation and performance of polyurethane/mesoporous silica composites for coated urea. Mater Des 99:21–25. https://doi.org/10.1016/j.matdes.2016.03.043
Othman MR, Helwani Z, Martunus (2010) Simulated fractal permeability for porous membranes. Appl Math Model 34(9):2452–2464. https://doi.org/10.1016/j.apm.2009.11.010
Perfect E, Kay BD (1995) Applications of fractals in soil and tillage research: a review. Soil Tillage Res 36(1):1–20. https://doi.org/10.1016/0167-1987(96)81397-3
Perrier E, Bird N, Rieu M (2000) Generalizing the fractal model of soil structure: the pore-solid fractal approach. Dev Soil Sci 27:47–74. https://doi.org/10.1016/S0016-7061(98)00102-5
Shi MS, Yu DM, Wang FM (2010) Bending properties of a polymer grout. J Mater Sci Eng 28(4):514–517. https://doi.org/10.14136/j.cnkiissnl1673-2812.2010.04.007
Shokrieh MM, Saeedi A, Chitsazzadeh M (2013) Mechanical properties of multi-walled carbon nanotube/polyester nanocomposites. J Nanostruct Chem 3(1):1–5. https://doi.org/10.1186/2193-8865-3-20
Sidek N, Mohamed K, Jais IBM, Abu Bakar IA (2015) Strength characteristics of polyurethane (PU) with modified sand. Appl Mech Mater 773–774:1508–1512. https://doi.org/10.4028/www.scientific.net/AMM.773-774.1508
Tyler SW, Wheatcraft SW (1992) Fractal scaling of soil particle-size distributions: analysis and limitations. Soil Sci Soc Am J 56(2):362–369. https://doi.org/10.2136/sssaj1992.03615995005600020005x
Wadell H (1932) Volume, shape, and roundness of rock particles. J Geology 40(5):443–451. https://doi.org/10.1086/623964
Wei Y, Wu X, Cai C (2015) Splash erosion of clay–sand mixtures and its relationship with soil physical properties: the effects of particle size distribution on soil structure. CATENA 135:254–262. https://doi.org/10.1016/j.catena.2015.08.003
Yao YB, Liu DM, Tang DZ, Tang SH, Huang WH, Liu ZH, Che Y (2009) Fractal characterization of seepage-pores of coals from China: an investigation on permeability of coals. Comput Geosci-Uk 35(6):1159–1166. https://doi.org/10.1016/j.cageo.2008.09.005
Zhang Y, Qi YH, Zhang ZP (2016) Synthesis of PPG-TDI-BDO polyurethane and the influence of hard segment content on its structure and antifouling properties. Prog Org Coat 97:115–121. https://doi.org/10.1016/j.porgcoat.2016.04.002
Zheng XG, Li SM, Xie YJ, Zeng Z, Weng ZC, Liu J, Yang DJ (2014) Study on relationship between density and mechanical behavior of high polymer grouting materials. J Wuhan Univ Technol 36(4):44–47. https://doi.org/10.3963/j.issn.1671-4431.2014.04.009
Acknowledgements
This work was supported by the National Basic Research Program of China (2015CB060200), the R-D program of Guangxi Province of China and the Fundamental Research Funds for the Central Universities of Central South University (2016zzts093). The corresponding author would like to thank the Chinese Scholarship Council for financial support toward his joint Ph.D. at the University of Newcastle, Australia. We would also like to acknowledge the reviewers for their invaluable comments.
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Zhou, Z., Du, X. & Wang, S. Strength for Modified Polyurethane with Modified Sand. Geotech Geol Eng 36, 1897–1906 (2018). https://doi.org/10.1007/s10706-017-0424-4
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DOI: https://doi.org/10.1007/s10706-017-0424-4