Professor, petroleum engineering abstract this trial study expected to research the physical, concoction and mechanical properties of fly fiery debris bond concrete for street development. Demonstration road project using fly ash near dadri u. Highvolume fly ash concrete is covered in a general way in. According to astm c618, the upper limit of loss on. The experimental program included california bearing ratio cbr tests to evaluate the bearing strength of stabilized soils used as working platforms during highway construction. Ggbs and fly ash, with a view to decreasing the construction cost.
The use of fly ash in highway construction, progress report. Introduction fly ash is a fine residue of coal combustion in the thermal power plants. There are different ways of using fly ash in industry like it can be used as partial replacement of cement. In the present investigation is to evaluate the compaction and unconfined compressive strength of stabilized clayey soil using fine ground granulated blast furnace slag ggbs and fly ash. Fly ash is an amorphous glassy material consisting of silica, aluminum, iron and calcium oxides plus other minor constituents. Principal scientist central road research institute new delhi 110 025 vittal. The admixture of lime or fly ash caused an increase in the plasticity limit, while both the liquid limit and the plasticity index of the soils have been reduced.
Jenny vestin 1, maria arm 2, desiree nordma rk 3, anders lagerkvist 3, per hallgren 4, bo lind 5. Class f fly ash is pozzolanic while class c fly ash is both selfcementitious and pozzolanic. Highway embankment construction using fly ash in cold regions. Use of fly ash for reconstruction of bituminous roads august 2009 6. Construction of semirigid rigid pavements limefly ash concrete dry lean cement fly ash concrete roller compacted concrete fly ash admixed concrete pavements limefly ash bound macadam precast block paving high performance concrete bituminous concrete 40 mm dbm 100 mm bm 75 mm wbm gr iiiwmm 75 mm wbm gr iiwmm. This soil beneficiation is of special importance in road and railway construction.
The power generation in india has increased from 62 mw in 1947 to 1,20,000 mw during. Professor, petroleum engineering abstract this trial study expected to research the physical, concoction and mechanical properties of. Fly ash a finally divided mineral residue of burning of coal exhibits excellent geotechnical as well as pozzolanic properties that make it very suitable for all construction activities including roads, embankments and reclamation of low lying areas. Physicomechanical properties of fly ash applicable in road construction an experimental research of physicomechanical properties of fly ash and ash stabilized with lime and cement, as used in road construction, is presented in the paper. Savings are estimated at greater than 50 percent for some applications. Physicomechanical properties of fly ash applicable in road construction after 28 days, the maximum value of the modulus of elasticity was achieved at ppnt a with 6 % of lime, while at ppnt b it was. Fly ash facts for highway engineers fhwa us department of. Gravel surfaced county road 53 being stabilized in situ with fly to form a firm base to for asphalt pavement tests, were conducted on samples of the rsg alone and the flyash stabilized rsg referred as srsg samples prepared in the field and laboratory to evaluate how addition of fly ash improved the strength and stiffness. Ash facts for highway engineers in 1986, the use of fly ash in highway construction has increased and new applications have been developed. Characterization of the road material, fly ash and the mixtures between them. Coal fly ash, or pulverised fuel ash pfa has been used for many years in road construction as a fill material, in concrete, lean mix subbases and in more recent years as a binder and aggregate in hydraulically bound materials. Dry fly ash is 3812 part 1 is reactive can replace part of cement in concrete pavement pond ash and bottom ash embankment fill, usage in gsb and base course as a non plastic material stabilise fly ash and build road pavements usage is environmentally safe, economical and as per government directives fly ash usage in road works. Hence use of fly ash for road and embankment construction is thus justifiably called highvolume ash utilisation.
The paper present determining the extent of surface water and groundwater contamination by fly ash from road construction. The incinerator ash from combustion of msw consists mainly of bottom ash and fly ash. A part of cement and sand can be replaced by good quality fly ash to the extent of 1030 percent and 515 percent respectively. Concrete is the largest market for fly ash and offers the highest potential for increased fly ash utilization. How much concrete is used in transportation construction.
Municipal solid waste incineration bottom ash as road. The developed technology demonstrates that extra water can be introduced into the samples with a very simple technique, which improves the performance of the fly ash used in road construction. In road and fly overs approximate 5% of fly ash is utilized. Beneficial use of fly ash for airport safety way extension. Overview of the use of fly ash concrete in highway. There is an excess of pfa produced annually within the uk and. The usage of fly ash in a construction industry is a challenging job and will make tremendous change all over world. Concrete is the largest market for fly ash and offers the highest potential for increased flyash utilization. Sakthiselvan, mrinimoy jyoti borah and swathi asst.
Typical fly ash contents may vary from 12 to 14 percent with corresponding lime contents of three to five percent. Fly ash is also recognized as an environmentally friendly material because it is a byproduct and has low embodied energy, the measure of how much energy is consumed in producing and shipping a building material. As the field number increases the fineness of fly ash increases but the quantity decreases since maximum availability of fly ash is from field 6, same was used for our study. The binder was added in the proportion of 2, 4 and 6 % of the total quantity of fly ash. Coal fly ash is a coal combustion product that has numerous applications in highway construction.
In this sector, it has a large potential for fly ash utilization. Fly ashes rich in lime are effective for stabilizing soils, due to the amount of free calcium oxide. Physicomechanical properties of fly ash applicable in. Coal being the main raw material for thermal power generation, ash is the essential by product. Beneficial use of fly ash for an airport safety way extension over a multiple year project. Review article management of fly ash in construction of. Experimental study report on use of fly ash in ready mixed. Road plays a crucial role in the development of the country. It is a coarser or sand or clay in appearance, with a diameter varying between 0. Chapter 3 methodology methods for evaluating fly ash for. Overview of the use of fly ash concrete in highway construction.
Archived fly ash facts for highway engineers fhwa us. According to astm c618, the upper limit of loss on ignition loi of both class c and f fly ash is 6%. In addition, the use of fly ash can provide a more costeffective choice when considering the decision to either rehabilitate or reconstruct a road. Class f fly ash is used in concrete to reduce the occurrence of alkalisilica reactivity. Saves top soil which otherwise is conventionally used. Coal combustion product generation and use short tons, 2003 75,000,000 percent used fly ash 38. Pdf physicomechanical properties of fly ash applicable. Ash way road construction in your area ash way is an evolving corridor and snohomish county wants to enhance mobility along the roadway from the admiralty waygibson road intersection to the 18th avenue w roundabout. Exploring fly ash utilization in construction of highways. Use of fly ash for reconstruction of bituminous roads. Fly ash facts for highway engineers transportation. The thermal grade indian coal contains 35 to 45% of ash resulting in generation of huge quantity of fly ash. Probably the greatest drawback to full utilization of fly ash concrete in highway construction is a perception that substi tuting fly ash for part of the portland cement constitutes the addition of an adulterant to the product. Using coal ash in highway construction a guide to benefits and impacts figure 4.
In the netherlands about 60,000 tons of fly ash were produced as a result of the incineration of municipal waste in 1993. This report gives an overview of the origin and properties of fly ash, its effect on the properties of hydraulic cement concrete, and the selection and use of fly ash in the production of. Bottom ash consists of slag, glass and partially unburned organic matter. This document provides basic technical information about the various uses of fly ash in highway construction. Lignite fly ash is an effective agent for chemical andor mechanical stabilization of soils. Particle size distribution of research gravelsand gs particle size distribution of gs material sieves crushed. Citeseerx water contamination by fly ash from road construction. Fly ash with loss on ignition of less than 4% is regarded as quite suitable for the purpose. Road construction method final linkedin slideshare. Plasant resident construction personnel, howard konrady and the district 5 materials personnel for their excellent cooperation in testing and evalation of the project. Citeseerx use of coal fly ash and other waste products. Comparative study on stabilization of soil with ground. Protection of environment by the use of fly ash in road construction 3 table 2.
It has been used in a variety of applications including as an addition to cement and concrete, for grouting mines and caverns, as a fill material for embankments, as a road. Fly ash and lime can be combined with aggregate to produce a quality stabilized base course. This utilization has many advantages over conventional methods. There they have installed esp for segregation and collection of fly ash into 6 different fields. Proposal for mpca solid waste demonstrationresearch. Class f low calcium fly ash while combustion of lignite or subbituminous coal produces class c high calcium fly ash. Trbs national cooperative highway research program nchrp 749.
When type f fly ash is available, lime must be added to fly ash to initiate cementation reactions. Concrete with fly ash 1020% by wt is cost effective and improves performance of rigid pavement. But major challenge will be complete use fly ash as aggregate in a construction industry. G 100 fa20g80 fa30g70 fa100 optimal water ratio % 12 19 25 54 density kgdm3 1 1,5 1,6 1,9. Gs crushed natural i gs natural 4 57 53 57 50 10 35 38 35 32 no 40 18 19 30 27 no 100 12 10 21 18. The use of fly ash blended cement in marine concrete will lead to higher resistance to chloride attack and good resistance to seawater damage. There are plenty of other examples of very effective use of fly ash as well in construction such as fly ash bricks, mass concrete in dams, road embankments, asphalt concrete, pavement concrete, etc, etc. The use of fly ash in highway projects will solve the. Fly ash has been used in roadways and interstate highways since the early 1950s. Coal ash, fly ash, fly ash utilisation, india, indian scenario, management, mission mode approach 1.
In an overcrowded country like the netherlands landfill is never a good solution. The author wishes to extend appreciation to joseph demeter, the mt. The use of fly ash in concrete road construction will save such resources. Fly ash a finally divided mineral residue of burning of coal exhibits excellent geotechnical as well as pozzolanic properties that make it very suitable for all construction activities including roads, embankments and reclamation of low lying. Uses, benefits, and drawbacks of fly ash in construction. Snohomish county public works is beginning to evaluate options to improve the corridor and wants your input. Major breakthrough in using fly ash in concrete was the construction of hungry horse dam in 1948, utilizing 120,000 metric tons. By contrast, portland cement has a very high embodied energy because its production requires a great deal. For slag, appendix of 989 specification for ground granulated blastfurnace slag for use in concrete and. Physicomechanical properties of fly ash applicable in road. This report gives an overview of the origin and properties of fly ash, its effect on the properties of hydraulic cement concrete, and the selection and use of fly ash in the production of hydraulic cement concrete and concrete products. Avoids creation of low lying areas by excavation of soil to be used for construction of embankments.
Chapter 3 methodology methods for evaluating fly ash. Groundwater and surface water are fundamentally interconnected. These road bases are referred to as pozzolanicstabilized mixtures psms. G100 denotes 100% road material, fa100 denotes 100% fly ash, fa20g80 denotes 20% fly ash and 80% road material, fa30g70 denotes 30% fly ash and 70% road material. A listing of the sources of fly ash can be found at pdf.
Sustainable construction with coal combustion products. Fly ash consisting of partially burned organic matter is dust like grey particle. Gravel surfaced county road 53 being stabilized in situ with fly to form a firm base to for asphalt pavement tests, were conducted on samples of the rsg alone and the fly ash stabilized rsg referred as srsg samples prepared in the field and laboratory to evaluate how addition of fly ash improved the strength and stiffness. Pdf physicomechanical properties of fly ash applicable in. Hence, especially for soft sub grade soil, more research is required for use of fly ash in road construction. Methods for evaluating fly ash for use in highway concrete. The use of fly ash typically results in more economical concrete construction. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Fly ash can be used for construction of road and embankment.
In the case of the fly ash we now have about ten years of experience with its application as a raw material in filler for road construction. Highway embankment construction using fly ash in cold. One area in highway construction where fly ash is potentially usable in high volume quantities is in pavement base courses. Major breakthrough in using fly ash in concrete was the construction of hungry horse dam in 1948, utilizing 120,000 metric tons of fly ash. Craig benson, tuncer edil, paul bloom, ali ebrahimi, brian kootstra, and lin li 9. The economic impacts of prohibiting coal fly ash use in. High volume applications for unique projects have utilized up to about 65% fly ash to extend service life and meet sustainability objectives. Proposal for mpca solid waste demonstrationresearch project. Yuning and louis ge, title use of coal fly ash and other waste products in soil stabilization and road constructionincluding nondestructive testing of roadways, year 2012. Sep 12, 2012 fly ash with loss on ignition of less than 4% is regarded as quite suitable for the purpose. Fly ash can be a costeffective substitute for portland cement in many markets. For road construction using examination of fly ash cement dr. Methods for evaluating fly ash for use in highway concrete presents suggested changes to coal fly ash specifications and test protocols contained in american association of state highway and transportation officials aashto standard specifications for transportation materials and methods of sampling and testing aashto m 295.
622 1143 1305 1466 1137 220 494 534 84 1518 179 759 57 379 406 1371 1174 451 599 1562 564 1383 96 1115 1371 1206 175 875 89