Title:
Nano-Modified Fly Ash Concrete: A Repair Option for Concrete Pavements
Author(s):
A. Ghazy, M. T. Bassuoni, and A. Shalaby
Publication:
Materials Journal
Volume:
113
Issue:
2
Appears on pages(s):
231-242
Keywords:
durability; early age; fly ash; nanosilica; repair
DOI:
10.14359/51688642
Date:
3/1/2016
Abstract:
Efficient repair of concrete pavements typically requires a rapid-setting material to accelerate opening the road to traffic. While numerous high-early-strength cementitious repair materials are commercially available, many of them are vulnerable to premature deterioration. On the other hand, despite its improved long-term performance, concrete incorporating fly ash is rarely used as a repair material due to the delay in setting time, strength gain, and microstructural development at early ages. Nevertheless, these performance limitations can be mitigated by incorporation of nanoparticles (for example, nanosilica) in fly ash concrete. In this study, an effort was made to develop nano-modified fly ash concrete as a repair material for concrete pavements. The performance of the newly developed mixtures was compared to that of two commercial cementitious products. The results indicate that the nano-modified fly ash concrete has balanced performance in terms of hardening time, strength development, bonding with substrate concrete, and resistance to infiltration of fluids and salt-frost scaling.
Related References:
1. Al-Ostaz, A.; Irshidat, M.; Tenkhoff, B.; and Ponnapalli, P. S., “Deterioration of Bond Integrity between Repair Material and Concrete due to Thermal and Mechanical Incompatibilities,” Journal of Materials in Civil Engineering, ASCE, V. 22, No. 2, 2010, pp. 136-144. doi: 10.1061/(ASCE)0899-1561(2010)22:2(136)
2. Li, M., and Victor, C. L., “High-Early-Strength Engineered Cementitious Composites for Fast, Durable Concrete Repair-Material,” ACI Materials Journal, V. 108, No. 1, Jan.-Feb. 2011, pp. 3-12.
3. Soliman, H., and Shalaby, A., “Characterizing the Performance of Cementitious Partial-Depth Repair Materials in Cold Climates,” Construction & Building Materials, V. 70, 2014, pp. 148-157. doi: 10.1016/j.conbuildmat.2014.07.114
4. Bentz, D. P., and Peltz, M. A., “Reducing Thermal and Autogeneous Shrinkage Contributions to Early-Age Cracking,” ACI Materials Journal, V. 105, No. 4, July-Aug. 2008, pp. 414-420.
5. Malhotra, V. M.; Zhang, M. H.; Read, P. H.; and Ryell, J., “Long-Term Mechanical Properties and Durability Characteristics of High-Strength/High-Performance Concrete Incorporating Supplementary Cementing Materials Under Outdoor Exposure Conditions,” ACI Materials Journal, V. 97, No. 5, Sept.-Oct. 2000, pp. 518-525.
6. Ondova, M.; Stevulova, N.; and Meciarova, L., “The Potential of Higher Share of Fly Ash Cement Replacement in the Concrete Pavement,” Procedia Engineering, V. 65, 2013, pp. 45-50. doi: 10.1016/j.proeng.2013.09.009
7. Huang, C.; Lin, S.; Chang, C.; and Chen, H., “Mix Proportions and Mechanical Properties of Concrete Containing Very High-Volume of Class F fly ash,” Construction & Building Materials, V. 46, 2013, pp. 71-78. doi: 10.1016/j.conbuildmat.2013.04.016
8. Said, A. M.; Zeidan, M. S.; Bassuoni, M. T.; and Tian, Y., “Properties of Concrete Incorporating Nano-silica,” Construction & Building Materials, V. 36, 2012, pp. 838-844. doi: 10.1016/j.conbuildmat.2012.06.044
9. Madani, H.; Bagheri, A.; and Parhizkar, T., “The Pozzolanic Reactivity of Monodispersed Nanosilica Hydrosols and Their Influence on the Hydration Characteristics of Portland Cement,” Cement and Concrete Research, V. 42, No. 12, 2012, pp. 1563-1570. doi: 10.1016/j.cemconres.2012.09.004
10. Belkowitz, J. S.; Belkowitz, W. L. B.; Nawrocki, K.; and Fisher, F. T., “Impact of Nanosilica Size and Surface Area on Concrete Properties,” ACI Materials Journal, V. 112, No. 3, May-June 2015, pp. 419-428. doi: 10.14359/51687397
11. Hou, P.; Kawashima, S.; Kong, D.; Corr, D.; Qian, J.; and Shah, S., “Modification Effects of Colloidal NanoSiO2 on Cement Hydration and its Gel Property,” Composites. Part B, Engineering, V. 45, No. 1, 2013, pp. 440-448. doi: 10.1016/j.compositesb.2012.05.056
12. CAN/CSA-A3001, “Cementitious Materials for Use in Concrete,” Canadian Standards Association, Mississauga, ON, Canada, 2008.
13. ASTM C494/C494M-13, “Standard Specification for Chemical Admixtures for Concrete,” ASTM International, West Conshohocken, PA, 2013, 10 pp.
14. ASTM C403/C403M-08, “Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance,” ASTM International, West Conshohocken, PA, 2008, 7 pp.
15. ASTM C1679-14, “Standard Practice for Measuring Hydration Kinetics of Hydraulic Cementitious Mixtures Using Isothermal Calorimetry,” ASTM International, West Conshohocken, PA, 2014, 7 pp.
16. ASTM C39/C39M-12, “Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens,” ASTM International, West Conshohocken, PA, 2012, 7 pp.
17. ASTM C496/C496M-11, “Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens,” ASTM International, West Conshohocken, PA, 2011, 5 pp.
18. CSA A23.2-6B, “Determination of Bond Strength of Bonded Toppings and Overlays and of Direct Tensile Strength of Concrete, Mortar, and Grout,” CSA A23.1/A23.2, Canadian Standards Association, Mississauga, ON, Canada, 2014.
19. ASTM C672/C672M-14, “Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to De-icing Chemicals,” ASTM International, West Conshohocken, PA, 2014, 3 p.
20. ASTM C1202-12, “Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration,” ASTM International, West Conshohocken, PA, 2012, 8 p.
21. Bassuoni, M. T.; Nehdi, M.; and Greenough, T., “Enhancing the Reliability of Evaluating Chloride Ingress in Concrete Using the ASTM C 1202 Rapid Chloride Penetrability Test,” Journal of ASTM International, V. 3, No. 3, 2006, 13 p.
22. Neville, A. M., Properties of Concrete, Prentice Hall, London, UK, 2011, 983 pp.
23. Mehta, P. K., and Monteiro, P. J. M., Concrete, McGraw Hill Education, 2014, 675 pp.
24. Stein, H. N., and Stevels, J. M., “Influence of Silica on the Hydration of 3CaO, SiO2,” Journal of Application Chemistry, V. 14, No. 8, 1964, pp. 338-346. doi: 10.1002/jctb.5010140805
25. Depasse, J., “Simple Experiments to Emphasize the Main Characteristics of the Coagulation of Silica Hydrosols by Alkaline Cations: Application to the Analysis of the Model of Colic et al,” Journal of Colloid and Interface Science, V. 220, No. 1, 1999, pp. 174-176. doi: 10.1006/jcis.1999.6594
26. Zerrouk, R.; Foissy, A.; Mercier, R.; Chevallier, Y.; and Morawski, J. C., “Study of Ca2+ Induced Silica Coagulation by Small Angle Scattering,” Journal of Colloid and Interface Science, V. 139, No. 1, 1990, pp. 20-29. doi: 10.1016/0021-9797(90)90441-P
27. Korpa, A.; Kowald, T.; and Trettin, R., “Hydration Behaviors, Structure and Morphology of Hydration Phases in Advanced Cement-Based Systems Containing Micro and Nanoscale Pozzolanic Additives,” Cement and Concrete Research, V. 38, No. 7, 2008, pp. 955-962. doi: 10.1016/j.cemconres.2008.02.010
28. Montgomery, D. C., Design and Analysis of Experiments, John Wiley and Sons, New York, 2014, 326 pp.
29. Oertel, T.; Hutter, F.; Tanzer, R.; Helbig, U.; and Sextl, G., “Primary Particle Size and Agglomerate Size Effects of Amorphous Silica in Ultra-High Performance Concrete,” Cement and Concrete Composites, V. 37, 2013, pp. 61-67. doi: 10.1016/j.cemconcomp.2012.12.005
30. Kong, D.; Du, X.; Wei, S.; Zhang, H.; Yang, Y.; and Shah, S. P., “Influence of Nano-Silica Agglomeration on Microstructure and Properties of the Hardened Cement-Based Materials,” Construction & Building Materials, V. 37, 2012, pp. 707-715. doi: 10.1016/j.conbuildmat.2012.08.006
31. Li, S.; Frantz, G. C.; and Stephens, J. E., “Bond Performance of Rapid-Setting Repair Materials Subjected to De-icing Salt and Freezing-Thawing Cycles,” ACI Materials Journal, V. 96, No. 6, Nov.-Dec. 1999, pp. 692-697.
32. Spragg, R. P.; Castro, J.; Li, W.; Pour-Ghaz, M.; Huang, P.; and Weiss, J., “Wetting and Drying of Concrete Using Aqueous Solutions Containing Deicing Salts,” Cement and Concrete Composites, V. 33, No. 5, 2011, pp. 535-542. doi: 10.1016/j.cemconcomp.2011.02.009
33. BNQ NQ 2621-900, “Determination of the Scaling Resistance of Concrete Surfaces Exposed to Freezing-and-Thawing Cycles in the Presence of De-icing Chemicals,” Bureau de Normalisation du Québec, Annexe A, 2002, pp. 19-22.
34. MTO LS-412, “Method of Test For Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals,” Ontario Lab Testing Manual, Ministry of Transportation, 1997.
35. Valenza, J. J. II, and Scherer, G. W., “A Review of Salt Scaling: II. Mechanisms,” Cement and Concrete Research, V. 37, No. 7, 2007, pp. 1022-1034. doi: 10.1016/j.cemconres.2007.03.003
36. CSA A23.1/A23.2, “Concrete Materials/Methods of Test and Standard Practices for Concrete,” Canadian Standards Association, Mississauga, ON, Canada, 2014.
37. Detwiler, R.; Bhatty, J.; and Bhattacharja, S., “Supplementary Cementing Materials for use in Blended Cements,” Portland Cement Association, Skokie, IL, 1996, 103 pp.