Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Polyurethane microcapsule self-repairing asphalt mixture and preparation method thereof
The invention discloses a polyurethane microcapsule self-repairing asphalt mixture and a preparation method thereof, and relates to the field of road building materials, the polyurethane microcapsule self-repairing asphalt mixture comprises polyurethane microcapsules, asphalt, mineral stone and a filler; the polyurethane microcapsule takes reactive polyisocyanate as a capsule core and takes a product obtained by carrying out interfacial polymerization reaction on a polyurethane prepolymer and a chain extender as a capsule wall. According to the invention, reactive polyisocyanate is used as a capsule core, a product of interfacial polymerization reaction of polyurethane prepolymer and a chain extender is used as a capsule wall, the prepared polyurethane microcapsule is added into an asphalt material to prepare the pavement, when the pavement has cracks, the polyurethane microcapsule is broken under the action of huge stress at the tip of the cracks, so that the pavement has good crack resistance. And the internal reactive polyisocyanate capsule core flows out and is cured by chemical reaction with water vapor in the air, so that the in-situ targeted repair of the asphalt pavement can be realized, and the repair effect is obviously superior to the physical repair effect of the traditional microcapsule.
本发明公开了一种聚氨酯微胶囊自修复沥青混合料及其制备方法，涉及道路建筑材料领域，包括聚氨酯微胶囊、沥青、矿物质石料和填料；聚氨酯微胶囊包括以反应性多异氰酸酯作为囊芯，以及聚氨酯预聚体与扩链剂经界面聚合反应的产物为囊壁。本发明通过使用反应性多异氰酸酯作为囊芯，使用聚氨酯预聚体与扩链剂经界面聚合反应的产物为囊壁，制得的聚氨酯微胶囊添加至沥青料中用以制备路面，这样的路面出现裂缝时，在裂缝尖端的巨大应力作用下，聚氨酯微胶囊发生破裂，内部的反应性多异氰酸酯囊芯随着流出，并与空气中的水气发生化学反应而固化，从而能够实现沥青路面的原位靶向修复，修复效果显著优于传统微胶囊的物理修复作用。
Polyurethane microcapsule self-repairing asphalt mixture and preparation method thereof
The invention discloses a polyurethane microcapsule self-repairing asphalt mixture and a preparation method thereof, and relates to the field of road building materials, the polyurethane microcapsule self-repairing asphalt mixture comprises polyurethane microcapsules, asphalt, mineral stone and a filler; the polyurethane microcapsule takes reactive polyisocyanate as a capsule core and takes a product obtained by carrying out interfacial polymerization reaction on a polyurethane prepolymer and a chain extender as a capsule wall. According to the invention, reactive polyisocyanate is used as a capsule core, a product of interfacial polymerization reaction of polyurethane prepolymer and a chain extender is used as a capsule wall, the prepared polyurethane microcapsule is added into an asphalt material to prepare the pavement, when the pavement has cracks, the polyurethane microcapsule is broken under the action of huge stress at the tip of the cracks, so that the pavement has good crack resistance. And the internal reactive polyisocyanate capsule core flows out and is cured by chemical reaction with water vapor in the air, so that the in-situ targeted repair of the asphalt pavement can be realized, and the repair effect is obviously superior to the physical repair effect of the traditional microcapsule.
本发明公开了一种聚氨酯微胶囊自修复沥青混合料及其制备方法，涉及道路建筑材料领域，包括聚氨酯微胶囊、沥青、矿物质石料和填料；聚氨酯微胶囊包括以反应性多异氰酸酯作为囊芯，以及聚氨酯预聚体与扩链剂经界面聚合反应的产物为囊壁。本发明通过使用反应性多异氰酸酯作为囊芯，使用聚氨酯预聚体与扩链剂经界面聚合反应的产物为囊壁，制得的聚氨酯微胶囊添加至沥青料中用以制备路面，这样的路面出现裂缝时，在裂缝尖端的巨大应力作用下，聚氨酯微胶囊发生破裂，内部的反应性多异氰酸酯囊芯随着流出，并与空气中的水气发生化学反应而固化，从而能够实现沥青路面的原位靶向修复，修复效果显著优于传统微胶囊的物理修复作用。
Polyurethane microcapsule self-repairing asphalt mixture and preparation method thereof
一种聚氨酯微胶囊自修复沥青混合料及其制备方法
LI RUI (Autor:in) / CHEN YUANYUAN (Autor:in) / ZHU HONGZHOU (Autor:in) / TANG NAIPENG (Autor:in) / LOU CHAO (Autor:in) / MA XINYUE (Autor:in)
12.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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