Sciences in Cold and Arid Regions ›› 2015, Vol. 7 ›› Issue (5): 619–625.doi: 10.3724/SP.J.1226.2015.00619

• ARTICLES • 上一篇    

Use of fly ash with no water consumption for cold regions transportation infrastructure

Gokhan Baykal   

  1. Department of Civil Engineering, Bogaziçi University, Istanbul 34342, Turkey
  • 收稿日期:2015-06-16 修回日期:2015-08-06 发布日期:2018-11-23
  • 通讯作者: Ph.D., Gokhan Baykal, Prof. of Bogaziçi University, Istanbul 34342, Turkey. Tel: +90-533-4191058; E-mail: baykal@boun.edu.tr E-mail:baykal@boun.edu.tr
  • 基金资助:
    The cold-bonding pellet aggregate formation research is supported by the Scientific and Technological Research Council of Turkey (TUBİTAK) with two projects (INTAG 606 and INTAG 627). The snow-added fly ash compaction project is supported by the Bogaziçi University Scientific Research Program titled BAP 639.

Use of fly ash with no water consumption for cold regions transportation infrastructure

Gokhan Baykal   

  1. Department of Civil Engineering, Bogaziçi University, Istanbul 34342, Turkey
  • Received:2015-06-16 Revised:2015-08-06 Published:2018-11-23
  • Contact: Ph.D., Gokhan Baykal, Prof. of Bogaziçi University, Istanbul 34342, Turkey. Tel: +90-533-4191058; E-mail: baykal@boun.edu.tr E-mail:baykal@boun.edu.tr
  • Supported by:
    The cold-bonding pellet aggregate formation research is supported by the Scientific and Technological Research Council of Turkey (TUBİTAK) with two projects (INTAG 606 and INTAG 627). The snow-added fly ash compaction project is supported by the Bogaziçi University Scientific Research Program titled BAP 639.

摘要: The construction period in cold regions is very short due to problems related to excavation and use of frozen soils in embankment construction, which leads to excessive deformations upon thawing. Also, handling of compaction water is critical due to freezing temperatures. Coalburning thermal power plants are very common in cold regions to supply electricity. The inorganic part of the pulverized coal after burning produces fly ash, which is available in large volumes. Due to excavation difficulties and the poor engineering behavior of frozen soils in cold regions, the utilization of fly ash when it is readily available must be promoted. Any construction technique which utilizes alternative materials like fly ash and minimizes water consumption has a potential to extend the short construction season and even allow service and maintenance during extreme weather conditions. This paper presents two potential techniques to solve the moisture affinity of silt-sized materials like fly ash. One technique involves in-plant production of fly ash pellets using cold-bonding pelletization to manufacture aggregates of up to 40,000-mm diameter from 15- to 60-mm-diameter fly ash grains. Large disc pelletizers have annual production capacities of up to one million ton at a reasonable cost. The product has adequate strength for embankment construction even when no water is used and no compaction is applied. The second technique is an in situ mixing technique which uses snow instead of compaction water for fly ash. The snow is the main element in this technique to compact the embankment. Water is needed for the hydration reactions to form cementitious minerals in fly ash. The slower the hydration reaction, the greater the crystal growth of cementitious minerals. In the proposed technique, in situ snow is mixed with fly ash and is compacted on-site. The temperature increase due to the hydration reaction of fly ash upon contact with snow crystals provides water for continued long-term hydration, which results in high strength, a high void ratio, light weight, and high thermal insulation capability. The presented techniques have the potential to extend the short construction season in cold regions and will provide fill material, decreasing the need for excavation. Both techniques are well documented under laboratory conditions, the research results have been published, and the techniques are ready for field trials to assess implementability.

关键词: cold regions embankment construction, frozen soil, compaction water, fly ash pellets, snow-compacted fly ash

Abstract: The construction period in cold regions is very short due to problems related to excavation and use of frozen soils in embankment construction, which leads to excessive deformations upon thawing. Also, handling of compaction water is critical due to freezing temperatures. Coalburning thermal power plants are very common in cold regions to supply electricity. The inorganic part of the pulverized coal after burning produces fly ash, which is available in large volumes. Due to excavation difficulties and the poor engineering behavior of frozen soils in cold regions, the utilization of fly ash when it is readily available must be promoted. Any construction technique which utilizes alternative materials like fly ash and minimizes water consumption has a potential to extend the short construction season and even allow service and maintenance during extreme weather conditions. This paper presents two potential techniques to solve the moisture affinity of silt-sized materials like fly ash. One technique involves in-plant production of fly ash pellets using cold-bonding pelletization to manufacture aggregates of up to 40,000-mm diameter from 15- to 60-mm-diameter fly ash grains. Large disc pelletizers have annual production capacities of up to one million ton at a reasonable cost. The product has adequate strength for embankment construction even when no water is used and no compaction is applied. The second technique is an in situ mixing technique which uses snow instead of compaction water for fly ash. The snow is the main element in this technique to compact the embankment. Water is needed for the hydration reactions to form cementitious minerals in fly ash. The slower the hydration reaction, the greater the crystal growth of cementitious minerals. In the proposed technique, in situ snow is mixed with fly ash and is compacted on-site. The temperature increase due to the hydration reaction of fly ash upon contact with snow crystals provides water for continued long-term hydration, which results in high strength, a high void ratio, light weight, and high thermal insulation capability. The presented techniques have the potential to extend the short construction season in cold regions and will provide fill material, decreasing the need for excavation. Both techniques are well documented under laboratory conditions, the research results have been published, and the techniques are ready for field trials to assess implementability.

Key words: cold regions embankment construction, frozen soil, compaction water, fly ash pellets, snow-compacted fly ash

Arslan H, 2003. The effect of grain crushing on the behavior of granular materials. M.Sc. Thesis, Bogaziçi University, Istanbul.
Arslan H, Baykal G, 2006a. Utilization of fly ash as engineering pelllet aggregates. Environmental Geology, 50: 761-770. DOI: 10.1007/s00254-006-0248-7.
Arslan H, Baykal G, 2006b. Analyzing the crushing of granular materials by sound analysis technique. ASTM, Journal of Testing and Evaluation, 34(6): 464-470. DOI: 10.1520/JTE100032.
Arslan H, Baykal G, Sture S, 2009. Analysis of the influence of crushing on the behavior of granular materials under shear. Granular Matter, 11: 87-97. DOI: 10.1007/s10035-009-0127-5.
Baykal G, 1995. Strength improvement of fly ash using ice. 11th International Symposium on Coal Ash Use and Management. American Coal Association & Energy Production Research Institute, Orlando, FL, Vol. 2, pp. 67-71.
Baykal G, 1996. Compacted fly ash-ice for low cost housing projects. XXIV IAHS World Housing Congress, May 27-June 1, Ankara, Vol. 2, pp. 644-651 (International Journal for Housing Science and Its Applications, Vol. 22, 1996).
Baykal G, 2013. Mechanics of manufactured soil using powder wastes. Proceedings of 16th International Conference of Soil Mechanics and Geotechnical Engineering, Paris.
Baykal G, Döven AG, 2000. Utilization of fly ash by pelletization process: Theory application areas and research results. Resources Conservation and Recycling Journal, 30: 59-77. DOI: 10.1016/S0921-3449(00)00042-2.
Baykal G, Edincliler A, Saygılı A, 2004. Highway embankment construction using fly ash in cold regions. Resources, Conservation and Recycling, 42(3): 209-222. DOI: 10.1016/j.resconrec.2004.04.002.
Baykal G, Erdurak MC, 2011. Artificial sand production for geotechnical uses. Proceedings of Advances in Ground Technology and Geo Information IS-AGTG, December 1-2, Singapore.
Baykal G, Mehmetoglu D, 1997. Utilization of fly ash as highway safety barriers. Twelfth International Symposium on Management & Use of Coal Combustion Byproducts (CCBs), January 26-30, Orlando, FL.
Baykal G, Saygılı A, 2011. A new technique to reduce the radioactivity of fly ash utilized in the construction industry. Fuel, 90: 1612-1617. DOI: 10.1016/j.fuel.2011.01.006.
Baykal G, Saygılı A, 2012. A new technique to improve freeze thaw durability of fly ash. Fuel, 102: 221-226. DOI: 10.1016/j.fuel.2012.06.041.
Danyıldız E, 2007. The interface behavior between granular soils and concrete. M.Sc. thesis, Bogaziçi University, Istanbul.
Danyıldız E, Baykal G, 2008. Use of manufactured pellet aggregates to study the effect of aggregate crushing on strength and deformation behavior at the concrete-soil interface. In: Frost D (ed.). Characterization and Behavior of Interfaces. Amsterdam: IOS Press, pp. 139-147.
Döven AG, 1998. Lightweight fly ash aggregate production using cold bonding technique. Ph.D. dissertation, Bogaziçi University, Istanbul.
Erdurak MC, 2011. Artificial sand production for laboratory uses. M.Sc. thesis, Bogaziçi University, Istanbul.
Mehmetoğlu D, 1994. Utilization of fly ash as highway safety barriers. M.Sc. thesis, Bogaziçi University, Istanbul.
Nishikawa J, 1999. Fundamental Experiments on Earthwork in Winter. Report: Civil Engineering Research Institute of Hokkaido, Japan.
Ramadan K, 1995. Composite and aggregate production using high calcium fly ash. Ph.D. dissertation, Bogaziçi University, Istanbul.
Saygılı A, 2008. Highway embankment construction using fly ash and snow in cold regions. Ph.D. disseration, Department of Civil Engineering, Bogaziçi University, Istanbul.
Saygılı A, Baykal G, 2011. A new method for improving the thermal insulation properties of fly ash. Energy and Buildings, 43(11): 3236-3242. DOI: 10.1016/j.enbuild.2011.08.024.
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