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Ahmed, H., Hashem, M., Rashwan, N., Abdalla, S. (2014). INVESTIGATION OF AGGREGATE PARTICLES SHAPE ON CHARACTERISTICS OF HOT MIX ASPHALT. JES. Journal of Engineering Sciences, 42(No 6), 1349-1366. doi: 10.21608/jesaun.2014.115110
Hassan Youness Ahmed; Mostafa Deep Hashem; Naglaa Kamal Rashwan; Samir Azmy Abdalla. "INVESTIGATION OF AGGREGATE PARTICLES SHAPE ON CHARACTERISTICS OF HOT MIX ASPHALT". JES. Journal of Engineering Sciences, 42, No 6, 2014, 1349-1366. doi: 10.21608/jesaun.2014.115110
Ahmed, H., Hashem, M., Rashwan, N., Abdalla, S. (2014). 'INVESTIGATION OF AGGREGATE PARTICLES SHAPE ON CHARACTERISTICS OF HOT MIX ASPHALT', JES. Journal of Engineering Sciences, 42(No 6), pp. 1349-1366. doi: 10.21608/jesaun.2014.115110
Ahmed, H., Hashem, M., Rashwan, N., Abdalla, S. INVESTIGATION OF AGGREGATE PARTICLES SHAPE ON CHARACTERISTICS OF HOT MIX ASPHALT. JES. Journal of Engineering Sciences, 2014; 42(No 6): 1349-1366. doi: 10.21608/jesaun.2014.115110

INVESTIGATION OF AGGREGATE PARTICLES SHAPE ON CHARACTERISTICS OF HOT MIX ASPHALT

Article 2, Volume 42, No 6, November and December 2014, Page 1349-1366  XML PDF (608.39 K)
Document Type: Research Paper
DOI: 10.21608/jesaun.2014.115110
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Authors
Hassan Youness Ahmed1; Mostafa Deep Hashem2; Naglaa Kamal Rashwan3; Samir Azmy Abdalla4
1Faculty of Engineering, Assiut University, Civil Engineering Department, EGYPT
2Faculty of Engineering, Minia University, Civil Engineering Department, EGYPT
3Civil Eng. Dept., Industrial Education College, Beni-Suef, EGYPT
4Civil Engineering Dept., Higher Institute of Engineering and Technology, El-Minia, Egypt.
Abstract
This research represents a laboratory study of the effect of the aggregate shape in HMA. The shape of
aggregates particles is not the only factor of aggregate characteristics which effect on HMA. Other
Parameters such as aggregate gradation and aggregate surface texture are also effect. The aggregate
shapes considered for the study were cubical, disk and blade shapes. Two aggregate surface textures used
in the mix which were smooth and rough particles. The aggregate gradations used in the mixtures were
maximum, medium and minimum gradation .Shape of aggregate was determined through two methods.
The first method was an image measurement of coarse aggregate while the second method was particle
shape index. Marshal tests and indirect tensile test were performed to investigate the different in
behaviors of different samples with different parameters considered in this study taking into account that
the control mix contains crushed gravel, rough aggregate particles with disk shape, medium gradation of
aggregate and 4% of limestone powder as mineral filler.
The results showed that using of cubical aggregate shape increased each of Marshall Stability, bulk
density, Marshall Stiffness, Marshall Quotient, Stiffness Modulus and the Indirect Tensile Strength
of the mix than disk and blade shapes while decreased each of flow and air voids. The results also,
showed that medium gradation of aggregate had good results than other gradations. By using rough
particles the values of ITS and stiffness modulus were higher than using smooth particles
Keywords
HMA; Aggregate; Aggregate shape; Gradation and Mineral filler
Main Subjects
Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.
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