A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design of asphalt mixes with steel slag aggregates using the Bailey method of gradation selection
Highlights Introduced a framework to design asphalt mixes with a 100% Steel Slag Aggregates (SSA). The approach can be used for mixes with aggregate fractions of varying specific gravity. The approach adopted the volume-based Bailey method of gradation selection. 100% SSA asphalt mixes were produced with VMA values of the same order as conventional mixes. Performance of 100% SSA mixes found to be comparable with conventional mixes.
Abstract It has been reported in the literature that the asphalt mixes containing a high percentage of Steel Slag Aggregates (SSA) are susceptible to high void space. This is one of the major reasons that SSA usage is limited to replacement of either the fine or coarse aggregates fraction, but not both by the road agencies. More void spaces in the asphalt mixes with a higher proportion of SSA can be attributed to the high specific gravity of the coarse aggregate (CA) of SSA and the adoption of weight-based gradation selection for mix design. This issue can be addressed by adopting the volume-based Bailey method. The present paper attempts to provide a framework to design asphalt mixes with a high proportion (up to 100%) SSA with aggregate fractions of varying specific gravity by employing the Bailey method of gradation selection. The study in the paper showed that by adopting the Bailey method for gradation selection, SSA mixes with Voids in Mineral Aggregates (VMA) similar to Natural Aggregate (NA) mixes can be produced despite the significant differences in specific gravities between the fine and coarse aggregate fractions. Test for mechanical properties on asphalt mixes suggested that the resilient modulus of SSA asphalt mixes can be 1.4 to 1.8 times that of NA asphalt mixes. Owing to the high particle strength of SSA combined with the predominantly cubical shape, SSA mixes were found to be relatively more resistant to rutting. Comparisons based on linear elastic analysis and design of hypothetical pavement sections indicate that the fatigue life of pavement with SSA asphalt base layers is comparable with the fatigue life of the pavement with NA asphalt mix bases. It was also observed that the asphalt mixes with SSA aggregates had shown relatively more resistance to the moisture damage.
Design of asphalt mixes with steel slag aggregates using the Bailey method of gradation selection
Highlights Introduced a framework to design asphalt mixes with a 100% Steel Slag Aggregates (SSA). The approach can be used for mixes with aggregate fractions of varying specific gravity. The approach adopted the volume-based Bailey method of gradation selection. 100% SSA asphalt mixes were produced with VMA values of the same order as conventional mixes. Performance of 100% SSA mixes found to be comparable with conventional mixes.
Abstract It has been reported in the literature that the asphalt mixes containing a high percentage of Steel Slag Aggregates (SSA) are susceptible to high void space. This is one of the major reasons that SSA usage is limited to replacement of either the fine or coarse aggregates fraction, but not both by the road agencies. More void spaces in the asphalt mixes with a higher proportion of SSA can be attributed to the high specific gravity of the coarse aggregate (CA) of SSA and the adoption of weight-based gradation selection for mix design. This issue can be addressed by adopting the volume-based Bailey method. The present paper attempts to provide a framework to design asphalt mixes with a high proportion (up to 100%) SSA with aggregate fractions of varying specific gravity by employing the Bailey method of gradation selection. The study in the paper showed that by adopting the Bailey method for gradation selection, SSA mixes with Voids in Mineral Aggregates (VMA) similar to Natural Aggregate (NA) mixes can be produced despite the significant differences in specific gravities between the fine and coarse aggregate fractions. Test for mechanical properties on asphalt mixes suggested that the resilient modulus of SSA asphalt mixes can be 1.4 to 1.8 times that of NA asphalt mixes. Owing to the high particle strength of SSA combined with the predominantly cubical shape, SSA mixes were found to be relatively more resistant to rutting. Comparisons based on linear elastic analysis and design of hypothetical pavement sections indicate that the fatigue life of pavement with SSA asphalt base layers is comparable with the fatigue life of the pavement with NA asphalt mix bases. It was also observed that the asphalt mixes with SSA aggregates had shown relatively more resistance to the moisture damage.
Design of asphalt mixes with steel slag aggregates using the Bailey method of gradation selection
Swathi, Malluru (author) / Andiyappan, Thavamani (author) / Guduru, Gurunath (author) / Amarnatha Reddy, M. (author) / Kuna, Kranthi K. (author)
2021-01-14
Article (Journal)
Electronic Resource
English
SSA , Steel Slag Aggregates , NA , Natural Aggregate , VMA , Voids in Mineral Aggregates , BF , Blast Furnace , BOF , Basic Oxygen Furnace , LD , Linz and Donawitz process , CA , Coarse Aggregate , FA , Fine Aggregate , XRF , X-ray Fluorescence , XRD , X-ray Diffraction , NMAS , Nominal Maximum Aggregate Size , BC , Bituminous Concrete , DBM , Dense Bituminous Macadam , CUW , Chosen Unit Weight , LUW , Loose Unit Weight , RUW , Rodded Unit Weight , CA ratio , Coarse Aggregate ratio , FA<inf>c</inf> ratio , Fine Aggregate Coarse ratio , FA<inf>f</inf> ratio , Fine Aggregate Fine ratio , P<inf>a</inf> , Percent air voids by volume , P<inf>ba</inf> , Percent bitumen absorption by aggregate mass , P<inf>be</inf> , Percent effective bitumen by total mass , P<inf>b</inf> , Percent total bitumen by total mass , G<inf>mm</inf> , Maximum theoretical specific gravity of loose mix , G<inf>mb</inf> , Bulk specific gravity of compacted specimen , OBC , Optimum Bitumen Content , M<inf>r</inf> , Resilient Modulus , ITFT , Indirect Tensile Fatigue Test , ITS , Indirect Tensile Strength , TSR , Tensile Strength Ratio , N<inf>f</inf> , Fatigue life in standard axle repetitions , Steel slag , LD Slag , Asphalt , Mix design , Bailey method
Gradation Chart for Asphalt Mixes: Development
| Online Contents | 2007
Gradation Chart for Asphalt Mixes: Development
| British Library Online Contents | 2007