Title: THE EFFECT OF NATURAL RUBBER LATEX ON CUTBACK ASPHALT MIXTURE CHARACTERISTICS FOR PATCHING
Abstract: In road maintenance, the use of cold mix with cutback asphalt for patching is very useful because of the simple equipment used, and the flexible volume of production based on the need for patching in the field. These can make for low costs. However, there are some constraints as follows: (1) After mixing, the mixture cannot be used immediately because it still contains too much solvent; the mixture looks wet and the asphalt is not sufficiently strong - hence, the mixture should be cured before lying for about 3 to 5 days; (2) Just after compacting, the early stability of the mixture is low, and the increasing rate of the stability is low too. The low viscosity of the asphalt causes constraints of cold mix with cutback asphalt. The existing solvent and the low evaporation rate of the solvent make the viscosity and increasing rate of viscosity low. On the other hand, natural rubber latex can be used to modify asphalt. The small amount of natural rubber latex in asphalt can make the mixture more elastic, resistant to temperature deviation, and more resistant to oxidation. In asphalt cutback, besides modifying asphalt, a small amount of natural rubber latex can increase the viscosity and overcome the constraints of low viscosity in the patching mixture. Although the solvent has not been evaporated, the viscosity of the cutback asphalt can be increased. In air temperature, the increasing rate of viscosity of cutback asphalt in the mixture that is caused by the addition of latex is higher and faster than that caused by the evaporating process of the solvent. For that reason, the cold mix with cutback asphalt will have a higher stability. To examine the influence of natural rubber latex on the characteristics of cold mix cutback asphalt, several experiments were conducted. The results of the experiments are presented in this paper. (a) For the covering entry of this conference, please see ITRD abstract no. E204151.
Publication Year: 2000
Publication Date: 2000-01-01
Language: en
Type: article
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