Anti-icing asphalt concrete and preparation method thereof

Abstract

The invention discloses an anti-icing asphalt concrete, which comprises the following components by weight: 37-39 parts of gravel with a particle size of greater than 11mm and less than or equal to 15mm; 13-15 parts of gravel with a particle size of greater than 6mm and less than or equal to 11mm; 4 parts of gravel with a particle size of greater than 3mm and less than or equal to 6mm; 40-42 parts of stone chips with a particle size of greater than 0 and less than or equal to 3mm; 3 parts of mineral powder; 5-6 parts of modified asphalt; and 5-6 parts of an admixture. The invention also discloses a preparation method of the anti-icing asphalt concrete. The preparation method provided by the invention not only ensures that the road anti-icing admixture is wrapped by asphalt, but also prevents a too high breakage rate of the road anti-icing admixture due to too long stirring time. With the proportion adopted by the invention, the porosity of the mixture is much smaller than that of a common asphalt mixture. After compaction, because of good compactness, the anti-icing asphalt concrete is not affected even in rainy days, the previous phenomenon that a honeycomb structure can appear on the pavement after completion of anti-icing asphalt concrete construction for a period of time can be completely eradicated, the pavement strength can be more durable, and the pavement service life can be prolonged.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to an anti-icing asphalt concrete. Background technique [0002] With the development of economy and society, infrastructure construction plays an increasingly important role in my country's economic life. Road construction is an important aspect of infrastructure construction. [0003] Ice on the road will have a great impact on traffic. On the one hand, after icing, the coefficient of friction between the vehicle and the road surface will be greatly reduced, and vehicle skidding will increase the accident rate, endangering people's life, health and property safety; on the other hand, in order to prevent vehicle skidding, the speed Very slow, increasing the phenomenon of poor traffic. Therefore, pavement anti-icing technology has become a research hotspot. [0004] At present, the treatment methods commonly used at home and abroad to suppress road ice and snow are generall...

AI Technical Summary

Problems solved by technology

[0011] The defect that was not found in this prior art and was first discovered by the inventor of this patent application is: the void ratio of ordinary AC-13 asphalt mixture (that is, the asphalt concrete used for laying the upper layer of the road surface) is between 3% and 5%. % (see page 28, Table 5.1.1 of the standard JTGF40-2004 Highway Asphalt Pavement Construction Technical Specification), the void ratio of the asphalt mixture increases by about 1% to 2% after adding "Lu Limei", resulting in the void ratio tends to decrease. More than 6%, and Lulimei is added in a large amount and melts when it meets water. Therefore, after a period of time after the pavement construction is completed, Lulimei on the upper layer of the road surface is soaked by rainwater and other water sources and melted, resulting in more intense pavement spalling and making the road surface appear Honeycombing, which leads to a decrease in pavement strength

[0012] In the prior art, when solving the technical problem of high porosity after adding Lulimei, it often causes the problem of too high asphalt consumption (higher than 6%), resulting in serious oil seepage on the road surface

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