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Preparation and Performance Evaluation of Cold Mix Asphaltic Liquid

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High-performance cold mix asphalt was prepared based on suitable cold mix asphaltic liquid. First, the contents of raw materials were estimated. The optimum composition of asphaltic liquid was determined by the orthogonal experimental design method. The properties of evaporated residue, adhesiveness, and construction workability were determined. At the same time, the microscopic characteristics of cold mix asphaltic liquid were analyzed by scanning electron microscopy (SEM). The results indicated that Brookfield viscosity was greatly influenced by diluent content at 60 °C. Brookfield viscosity was decreased with the increase of diluent content. Brookfield viscosity was hardly influenced by contents of the additive and styreneic block copolymers (SBS) at 60 °C. Samples 2, 3, 5 and 6 met the requirement of viscosity. The penetration degree of the evaporated residue in asphaltic liquid met the requirement for roads. The Chinese Standard JTG F40-2004 was used to measure the ductility of asphaltic liquids at 5 and 15 °C. The softening points exceeded 50 °C, indicating the excellent high-temperature performance of cold mix asphaltic liquid. The adhesiveness between asphaltic liquid and aggregates was graded at Level 5 (Chinese Standard T0616-1993). The mixture containing samples 5 and 6 was slightly white in color, the fine aggregate was exposed completely. Changing the temperature of the mixture from 90 °C (testing temperature) to 70 °C (mixing temperature), the adhesiveness between aggregate and asphalt was reduced. The fine aggregates were not exposed in the mixture containing samples 2 and 3, and the corresponding mixing ratios can be applied for the production of cold mix asphaltic liquid. Modifiers and additives in cold mix asphaltic liquid were uniformly dispersed. At the same time, it demonstrated that the diluent showed a certain influence on the morphology of residue of cold mix asphaltic liquid, so that a number of folds and holes existed on the surface of the residue.
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Keywords: Additive; Cold Mix Asphaltic Liquid; Micro-Analysis; Orthogonal Test; Pavement Maintenance; Road Engineering; Scanning Electron Microscopy

Document Type: Research Article

Affiliations: Key Laboratory of Special Environment Road Engineering of Hunan Province, Changsha University of Science & Technology, Changsha 410004, China

Publication date: January 1, 2019

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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