The effect of Vietnam’s nano-silica on mechanical properties of high-performance concrete

  • Le Hong Lam

    Ho Chi Minh City University of Transport, Hochiminh city, Vietnam
  • Dao Duy Lam

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Pham Duy Huu

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
Từ khóa: High performance concrete, nano silica, concrete mixture, compressive strength, optimize the proportion.

Tóm tắt

The demand for High Performance Concrete (HPC) is steadily increasing with massive developments. Conventionally, it is possible to use industrial products such as silica fume (SF), fly ash, as supplementary cementitious materials (SCM), to enhance the attributes of HPC. In recent years, nano-silica (NS) is used as an additive in added mainly to fill up the deviation arises with the addition of SF for HPC. This study aims to optimize the proportion of NS (produced in Vietnam) in the mixture used for fabricating 70 MPa high-performance concrete. SiO2 powder with particle size from 10 to 15 nm were used for mixing. A series of compressive strength test of HPC with nano-SiO2 varied from 0 to 2.8 percent of total of all binders (0%, 1.2%, 2%, 2.8%), and the fixed percentage of silica fume at 8% were proposed. Results show compressive strength increases with the increase of nano-SiO2, but this increase stops after reaching 2%. And at day 28 of the curing period, only concrete mixture containing of 8% silica fume and 2% nano-SiO2, had the highest compressive strength.

Tài liệu tham khảo

[1] N. Thuadaij, A. Nuntiya, Synthesis and Characterization of Nanosilica from Rice Husk Ash Prepared by Precipitation Method, J.Nat.Sci. Special Issue on Nanotechnology, 7 (2008) 59-65.;jsessionid=651627342BEFA7112E1010140E5EFB69?doi=
[2] Ozyildirim et al., Laboratory Investigation of Nanomaterials to Improvethe Permeability and Strength of Concrete, Virginia Transportation Research Council, 530 Edgemont Road, Charlottesville, VA 22903-2454, 2010.
[3] R. Abbas, Influence of Nano-Silica Addition on Properties of Conventional and Ultra-High Performance Concretes, HBRC Journal, 5 (2009).
[4] M. Nili, A. Ehsani, K. Shabani, Influence of Nano-SiO2 and Microsilica on Concrete Performance, Second International Conference on sustainable Construction Material and Technologies, 2010.
[5] V. S. Melo et al., Macro and Micro Characterization of Mortars Produced with Carbon Nanotubes, ACI Materials Journal, 108 (2011) 327-332.
[6] M. H. Zhang et al., Mechanical Property of Pavement Concrete with Nanoparticles, Advanced Materials Research, 168-170 (2010) 1896-1899.
[7] D. F. Lin et al., Improvements of nano-SiO2 on sludge/fy ash mortar, Waste Manage, 28 (2008) 1081-1087.
[8] J. Björnström et al., Accelerating effects of colloidal nano-silica for beneficial calcium–silicate–hydrate formation in cement, Chemical Physics Letters, 392 (2004) 242-248.
[9] S. Xu et al., Environmental resistance of cement concrete modifed with low dosage nano particles, Construction and Building Materials, 164 (2018) 535-553.
[10] X. F. Wang et al., Effect of nano-SiO2 on strength, shrinkage and cracking sensitivity of lightweight aggregate concrete, Construction Build Mater, 175 (2018) 115-125.
[11] A. N. Givi et al., The effects of lime solution on the properties of SiO2 nanoparticles binary blended concrete, Composites Part B: Engineering, 42 (2011) 562-569.
[12] A. Nazari, S. Riahi, Compressive strength and abrasion resistance of concrete containing SiO2 and Cr2O3 nanoparticles in diferent curing media, Magazine of Concrete Research, 64 (2012) 177-188.
[13] A. Najigivi et al., Investigating the effects of using different types of SiO2 nanoparticles on the mechanical properties of binary blended concrete, Composites Part B: Engineering, 54 (2013) 52-58.
[14] A. Nazari, S. Riahi, The effects of SiO2 nanoparticles on physical and mechanical properties of high strength compacting concrete, Composites Part B: Engineering, 42 (2011) 570-578.
[15]. H. Bahadori, P. Hosseini, Reduction of cement consumption by the aid of silica nano-particles, Journal of Civil Engineering and Management, 18 (2012) 416-425.
[16] P. Hosseini, A. Booshehrian, A. Madari, Developing concrete recycling strategies by utilization of nano-SiO2 particles, Waste and Biomass Valorization, 2 (2011) 347-355.
[17] A. Najigivi et al., Water absorption control of ternary blended concrete with nano-SiO2 in presence of rice husk ash, Materials and Structures, 45 (2012) 1007-1017.

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