Results 181 to 190 of about 54,469 (225)

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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Effect of Cement on Emulsified Asphalt Mixtures

Journal of Materials Engineering and Performance, 2007
Emulsified asphalt mixtures have environmental, economical, and logistical advantages over hot mixtures. However, they have attracted little attention as structural layers due to their inadequate performance and susceptibility to early life damage by rainfall.
Seref Oruc, Fazil Celik, M. Vefa Akpinar
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A continuum damage model for asphalt cement and asphalt mastic fatigue

International Journal of Fatigue, 2016
Abstract An analytical model is developed for the mechanical degradation of asphalt cement and mastic under repeated loading. The model is derived by applying the strain decomposition principle to consider linear viscoelastic, nonlinear viscoelastic, and damage mechanisms.
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Interaction mechanism of cement and asphalt emulsion in asphalt emulsion mixtures

Materials and Structures, 2013
The interaction characteristics of cement asphalt composite mastic (CAM) and performance properties of cement asphalt emulsion mixtures (CAEM) were evaluated in this work using chemical and mechanical test methods to investigate the effect of the presence of cement on asphalt emulsion mixtures (AEM).
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Rheological Behavior of Fresh Cement Asphalt Mortar

Sustainable Construction Materials 2012, 2012
Cement asphalt mortar (CA mortar) is the key component in the structure of Shinkansen slab track and serves as the elastic shock-absorber. CA mortar is a composite material with cement and asphalt emulsion and acts as a cushion layer in the structure of slab track.
Zhifei Liu, Jinxiang Hong, Jiaping Liu
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Viscosity of Asphalt Cements at Intermediate Pressures

Product R&D, 1974
A suspended two-piston capillary system for measuring flow of asphalt cements at up to 700 atm is described. The method was used to report the variation in viscosity with pressure on 14 different asphalt cements at 10, 25, and 60 DEG C. The general applicability of the Doolittle exponential relation for the data was demonstrated, and a discussion of ...
H. E. Schweyer, R. W. Lodge
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