Warm-mix modifier and preparation method thereof

Abstract

The invention discloses a warm-mix modifier and a preparation method thereof. According to technical main points in the invention, the warm-mix modifier comprises the following raw materials in partsby weight: 25 to 56 parts of N,N'-ethylene bis-stearamide, 18 to 35 parts of n-butyl stearate, 16 to 36 parts of ethyl cellulose, 15 to 35 parts of an aromatic hydrocarbon oil compatilizer and 12 to 30 parts of a flexibilizer. The preparation method comprises the following steps: mixing N,N'-ethylene bis-stearamide liquid, n-butyl stearate liquid, ethyl cellulose liquid, the aromatic hydrocarbon oil compatilizer and the flexibilizer to obtain a liquid mixture; and cooling the liquid mixture to a viscous state, carrying out granulating, then performing airing at normal temperature, carrying outcrushing, then performing sieving with a 15-to-20-mesh sieve, and taking a undersize product to obtain the warm-mix modifier. The warm-mix modifier disclosed by the invention can effectively reduce the mixing temperature of an asphalt mixture, so the problems of energy consumption and increase of the emission of wastes such as smoke and dust during production of the asphalt mixture are solved; and the warm-mix modifier can be smoothly constructed in winter with a relatively low environment temperature, and the toughness, cohesiveness and the like of the asphalt mixture are not excessively influenced.

Description

technical field [0001] The invention relates to the field of road maintenance, more specifically, it relates to a warm mixing modifier and a preparation method thereof. Background technique [0002] In the process of road use, damage will inevitably occur due to external factors and road materials themselves. For the safety of road use, it is necessary to maintain and repair the damaged parts of the road in time. At present, asphalt mixture is often used to relay roads, but due to the high mixing and compaction temperature of asphalt mixture, it leads to the increase of energy consumption and waste emissions such as smoke and dust during the production of asphalt mixture. Lower winter construction is hindered. [0003] In order to solve the above problems, warm-mix asphalt modification technology has emerged, which uses specific technical solutions or additives to make the mixing and construction temperature (110°C-130°C) between hot-mix asphalt mixture (150°C-180°C) It is...

AI Technical Summary

Problems solved by technology

But on the other hand, the addition of such organic additives also brings some technical negative effects: 1. Most organic viscosity reducers reduce the low-temperature ductility of asphalt, making the asphalt brittle, and damaging the low-temperature performance of asphalt mixture 2. The interfacial lubricating effect brought by the wax components and lubricating groups (such as amides) in most pure organic viscosity reducers reduces the interfacial cohesion and adhesion between asphalt and stone, which brings road surface Adverse effects such as reduced water damage resistance and stone shedding

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