Direct-injection bio-based asphalt mixture warm-mixing agent as well as preparation method and application thereof

Abstract

The invention discloses a direct-injection bio-based asphalt mixture warm-mixing agent which comprises the following components by weight percentage: 60-90% of polyolefin, 0-20% of a bio-based filler,0-30% of petroleum resin, 0-6% of a lubricant and 0.2-0.6% of an antioxidant. When being used, the warm-mixing agent is mixed with matrix asphalt and stone; the polyolefin used in the invention has the advantages of low melting point and easy dispersion; the bio-based filler has the effects of reinforcing, filling and reducing the cost, and can improve the strength and compactness of the asphaltmixture; in addition, the bio-based filler is derived from a black liquor extract of papermaking, which has positive significance for environmental sewage treatment; the petroleum resin improves the bonding strength of asphalt; the antioxidant improves the heat resistance and aging resistance; and the lubricant optimizes the low-temperature performance, dispersibility and processability. The warm-mixing agent has the advantages of good comprehensive performance such as resistance to water damage, rutting resistance and low-temperature performance, and can be popularized and applied to the paving technology of asphalt pavement.

Description

technical field [0001] The invention relates to the technical field of asphalt additives, in particular to a direct-throwing warm mix agent for bio-based asphalt mixture, a preparation method and application thereof. Background technique [0002] Warm mix asphalt mixture technology has the advantages of mixing and low construction temperature (120-140°C). Compared with traditional hot-mix mixture technology (160-180°C), it has the advantages of reducing energy consumption, harmful gas emissions and smoke emissions, Prevent problems such as thermal aging of materials. With good construction conditions, it is more and more favored by construction workers. However, the technical comprehensive performance of warm mix asphalt mixture is slightly worse than that of hot mix mixture. How to improve the performance of warm mix asphalt mixture has become the research focus in recent years. [0003] Patent CN201110212562.9 discloses a warm-mix modifier for asphalt mixture prepared b...

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Problems solved by technology

[0003] Patent CN201110212562.9 discloses a warm-mix modifier for asphalt mixture prepared by using waste plastics and inorganic reinforcing agents. Using waste plastics has the risk of unstable performance, and inorganic reinforcing agents have the defects of poor reinforcing effect and poor compatibility.

Patent CN201310013993.1 discloses an environmentally friendly asphalt mixture modifier using polyethylene wax as the main raw material. Due to the low molecular weight, there is a risk of poor thermal aging resistance

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