A high-modulus warm-mix asphalt additive and a preparing method and application thereof

Abstract

The invention belongs to the field of traffic engineering admixtures, and relates to preparation and application of a high-modulus warm-mix asphalt additive. The additive is prepared mainly from a high modulus warm-mix main agent, a thermoplastic elastomer, vegetable oil, a crosslinking agent, a coupling agent, an antioxidant, an antiager and tackifying resin through single-screw low-temperature extrusion and granulation. The additive prepared can be direly added into a material mixture, and is suitable for high-modulus asphalt pavement engineering and winter low-temperature construction environments having high requirements on environment protection. An asphalt mixture prepared by utilizing the additive has excellent high-temperature performance, high dynamic modulus, good low-temperaturetoughness, excellent resistance to water damage, and the like, can reduce temperature for construction such as material mixture mixing, paving and grinding by 20-30 DEG C, achieves a warm mix effects, and is suitable for promotion and application.

Description

technical field [0001] The invention belongs to the field of traffic engineering admixtures, in particular to a high-modulus warm-mix asphalt additive and its preparation method and application. Background technique [0002] In recent years, with the rapid development of the national economy and the continuous expansion of the scale of road construction, the problems of vehicle overload and heavy-duty vehicles have appeared, which has caused increasingly serious damage to the asphalt pavement. High modulus asphalt pavement technology is different from the traditional addition of anti-rutting agent to improve the anti-rutting ability of the pavement. It starts from the overall structural design of the pavement, and achieves good engineering and economic benefits by improving the comprehensive requirements of materials and reducing the thickness of the pavement. [0003] High-modulus asphalt pavement technology originated in France in the last century, which put forward clear ...

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Problems solved by technology

Chinese patent CN103102707B discloses a high modulus asphalt modifier, which is prepared by blending and granulating waste plastics. Although the cost is low and the preparation method is simple; but there is a lack of relevant experiments and application performance evaluation of asphalt mixture

CN104194366B discloses a low-temperature-resistant high-modulus asphalt modifier and its preparation method, which overcomes the problem of significant differences in the blending process of waste plastics and rubber through cold processing, and the prepared modifier has excellent high and low temperature performance; but the application The occasion is limited, it is difficult to adapt to the low temperature construction environment

CN102976649B discloses a warm mix agent for waste rubber powder modified asphalt and a preparation method thereof. The prepared warm mix agent can significantly reduce the viscosity of rubber powder modified asphalt and reduce the construction temperature; however, it does not improve the high temperature performance of modified asphalt. Big

CN107383907A discloses a warm-mix high-modulus asphalt modifier, a preparation method and its application. The warm-mix high-modulus main agent is prepared by cracking polymer particles. It has excellent comprehensive performance; however, the preparation of the high-modulus main agent in this patent requires high equipment requirements, and the reaction temperature is high, and the reaction is difficult to control

In summary, although the above modification technologies can solve the problems of high modulus of asphalt or reduce the construction temperature to a certain extent, it is difficult to meet the requirements of high modulus, warm mixing and comprehensive performance at the same time.

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