Results 131 to 140 of about 3,024 (160)

Flow Behavior of Asphalt Cements

1967
The Kentucky Department of Highways in cooperation with the Bureau of Public Roads is conducting a continuing investigation of the fundamental mechanical properties of flexible pavement materials. The ultimate objective of this investigation is to gain sufficient knowledge of the fundamental mechanical behavior of these materials to support the ...
Mossbarger, W. A., Deacon, John A.
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Reformulation of Asphalt Cements for Paving

Journal of Transportation Engineering, 2002
This paper summarizes research on the behavior of reformulated asphalt cements (AC) produced by different blending combinations of propane precipitated asphalt (PPA) and other petroleum-based components—soft asphalt residues and furfural heavy oils. The asphalt cements were tested fresh and under variable aging conditions.
Ilan Ishai, Ruth Yuval
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Workability of Fresh Cement-Asphalt Mastic

Applied Mechanics and Materials, 2013
The Cement-Asphalt Mastic (CAM) is combined with emulsified asphalt and cement. It can mix at room temperature manufacturing and construction without heating. This study investigated viscosity, slump, setting time and segregation of fresh Cement-Asphalt Mastic (CAM). These properties help control the quality of Cement-Asphalt Concrete (CAC).
Ming Feng Kuo, Cheng Tsung Lu, Jia Chong Du, Yu Kai Chen   +3 more
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Viscosity Characterization of Asphalt Cement

1973
There exists an inherent relationship between the commonly used consistency tests (viscosity at 140 F (60 C), viscosity at 275 F (135C), and penetration at 77 F (25 C)) as applied to asphalt cements used in paving. Based on data accumulated from 84 worldwide crude sources of asphalt, it is shown that the viscosity at 140 F is related to each of the ...
LW Corbett, HE Schweyer
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Modeling Mechanical Properties of Cement Asphalt Emulsion Mortar with Different Asphalt to Cement Ratios and Temperatures

Journal of Materials in Civil Engineering, 2018
AbstractThe compressive strength and elastic modulus of cement asphalt emulsion mortar (CAM) are two fundamental parameters of material design, and their values are highly dependent on asphalt:ceme...
Jian Ouyang, Jiuye Zhao, Yiqiu Tan
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Effect of emulsifier on cement hydration in cement asphalt mortar

Construction and Building Materials, 2013
Cement asphalt mortar (CA mortar) is a key material of non-ballasted track structure. In order to solve the problem that cement hardens slowly in CA mortar, the retarding effect of emulsifier on cement hydration was studied by measurement of cement setting time, hydration heat and X-ray diffraction analysis. Results show that emulsifier has significant
Yiqiu Tan, Jian Ouyang, Jianfu Lv, Yunliang Li   +3 more
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Demulsification process of asphalt emulsion in fresh cement-asphalt emulsion paste

Materials and Structures, 2014
The demulsification process of asphalt emulsion in fresh cement asphalt emulsion (CA) paste was investigated by measuring the viscosity and the particle size distribution of CA paste. The morphology evolution of asphalt droplets was also observed by optical microscope. Superplasticizer was used to adjust different demulsifying speed of asphalt emulsion
Jian Ouyang, Yiqiu Tan, Yunliang Li, Jiuye Zhao   +3 more
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Effect of Emulsified Asphalt on Temperature Susceptibility of Cement Asphalt Mortar

Advanced Materials Research, 2011
Cement asphalt mortar (CA mortar, or CAM) is a composite material with equal presence of cement and asphalt emulsion and acts as a cushion layer in the structure of slab track. In the hardened matrix, asphalt accounts for about 30 vol. %, rendering the properties of CA mortar susceptible to temperature variation.
Yun Hua Zhang, Fa Zhou Wang
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Effect of mass ratio of asphalt to cement on the properties of cement modified asphalt emulsion mortar

Construction and Building Materials, 2017
Abstract This study evaluated the effects of two types of cationic modified asphalt emulsions, i.e. SBS modified asphalt emulsion and SBR modified asphalt emulsion, on the flow time, air content and mechanical properties of cement emulsified asphalt mortar (CEAM) at varying asphalt to cement (A/C) ratios.
Baoju Liu, Dong Liang
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Asphalt Cement Characterization by Thermomechanical Analysis

1991
Thermomechanical analysis (TMA) techniques were used to characterize 60 original and aged asphalt cements. The objectives were to find better methods to characterize asphalts at low temperatures, to predict low-temperature cracking potentials, and to develop correlations between thermal properties of asphalts and their field performance for ...
D-Y Lee, BV Enustun, S-S Kim
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