Modified asphalt master batch and preparing method and application thereof

Abstract

The invention relates to the technical field of modified asphalt and particularly provides a modified asphalt master batch. The modified asphalt master batch is prepared from, by weight, 40-60 parts of EVA, 10-20 parts of extract oil of aromatic hydrocarbon, 5-10 parts of rubber powder, 5-10 parts of organic wax, 5-15 parts of polyethylene, 3-5 parts of stearic acid, 2-5 parts of plasticizer, 2-4 parts of nano-particle and 0.1-0.5 part of antioxidant. The invention further provides a preparing method and application of the modified asphalt master batch. According to the modified asphalt master batch, asphalt is modified by organically combining the EVA, the rubber powder, the organic wax, the nano-particles and other raw materials, the high-low temperature performance and stability of the asphalt can be remarkably improved, separation of the asphalt in the use process can be effectively relieved through the good compatibility with the asphalt, and the good modified effect is achieved; the production process is simple, use is convenient, and quick and large-scale production of modification of the asphalt can be achieved.

Description

【Technical field】 [0001] The invention relates to the technical field of modified asphalt, in particular to a modified asphalt master batch, a preparation method and application thereof. 【Background technique】 [0002] Asphalt pavement is a semi-rigid pavement with the characteristics of shock absorption, comfort and easy maintenance. It is currently the preferred pavement form for roads. With the increase of traffic volume, traffic load, traffic speed, and the gradual increase of extreme weather, such as extreme cold and extreme heat, people have put forward more stringent requirements for road paving asphalt materials. However, the existing ordinary asphalt is easy to crack at low temperature, and is easy to soften and cause rutting at high temperature, which can no longer meet the actual needs of the road. [0003] Various modified asphalt technologies have emerged. Among them, SBS (Styreneic Block Copolymers, styrene-butadiene-styrene triblock copolymer) modified asphal...

AI Technical Summary

Problems solved by technology

However, due to the low technical threshold, there are more and more manufacturers producing SBS modified asphalt, and its quality is uneven, and many construction units even produce it themselves; in addition, SBS modification needs to add at least 4.5% to achieve good performance. Considering the cost factor, some low-cost additives are usually added during use. The actual amount of SBS in asphalt is less and less, and the high cost limits its application; further, SBS modified asphalt The production process of SBS is complex, and it needs to go through multiple processes such as grinding, swelling, development, high-temperature storage, high-temperature transportation, etc., and the entire production cycle is long; in addition, the compatibility between SBS and asphalt is limited, and SBS modified asphalt is only a temporary stable system. If the high temperature storage time is too long, segregation will occur and the performance of SBS modified asphalt will be reduced

[0004] Therefore, although the effect of SBS modified asphalt is good, and various detection indicators can meet the requirements of the specification, its quality in actual use is still questioned by the industry

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