Self-healing asphalt concrete based on microwave heating and containing metal fibers and preparation method of self-healing asphalt concrete
An asphalt concrete and microwave heating technology, which is applied in the field of concrete admixtures, can solve the problems of inconvenient road surface maintenance and increased maintenance expenditure, and achieve the effects of improving electrothermal performance, helping to melt ice and snow, and facilitating construction
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Embodiment 1
[0016] A self-healing metal fiber asphalt concrete based on microwave heating, made of the following raw materials in parts by weight: 60 parts of coarse aggregate, 30 parts of fine aggregate, 4 parts of finely ground steel slag powder filler, 4 parts of asphalt, and asphalt Composed of steel wool fibers with a volume of 2%, the length of the steel wool fibers is 2.5mm, and the diameter is 0.03642mm.
[0017] Preparation: Add steel wool fibers to the asphalt at 160°C and stir evenly, then mix evenly with coarse aggregate and fine aggregate heated to 170°C, then add finely ground steel slag filler and stir evenly to obtain a mixture, and the stirring time is 4 Minutes; the two sides of the above-mentioned mixture were compacted 75 times with a Marshall compaction instrument to obtain concrete.
Embodiment 2
[0019] A self-healing metal fiber asphalt concrete based on microwave heating, made of the following raw materials in parts by weight: 62 parts of coarse aggregate, 23 parts of fine aggregate, 5 parts of finely ground steel slag powder filler, 5 parts of asphalt, and asphalt 5% by volume of steel wool fibers, the length of the steel wool fibers is 2.5mm, and the diameter is 0.03642mm.
[0020] Preparation: Add steel wool fibers to asphalt at 165°C and stir evenly, then mix evenly with coarse aggregate and fine aggregate heated to 175°C, then add finely ground steel slag filler and stir evenly to obtain a mixture, and the stirring time is 5 Minutes; the above mixture was compacted 100 times with a rotary compactor to obtain concrete.
Embodiment 3
[0022] A self-healing metal fiber asphalt concrete based on microwave heating, made of the following raw materials in parts by weight: 70 parts of coarse aggregate, 20 parts of fine aggregate, 4 parts of finely ground steel slag filler, 4 parts of asphalt, and asphalt Composed of steel wool fibers with a volume of 2%, the length of the steel wool fibers is 2.5mm, and the diameter is 0.03642mm.
[0023] Preparation: Add steel wool fibers to asphalt at 170°C and stir evenly, then mix with coarse aggregate and fine aggregate heated to 180°C, then add finely ground steel slag filler and stir evenly to obtain a mixture, and the stirring time is 6 Minutes; the two sides of the above-mentioned mixture were compacted 75 times with a Marshall compaction instrument to obtain concrete.
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