Processing waste rubber products into rubber powder is one of the main ways of recycling waste rubber, of which waste tire rubber powder is the majority. The main components of tire rubber powder are natural rubber, synthetic rubber and carbon black, as well as a small amount of sulfur, iron oxide and other compounding agents. They can be used as asphalt modifiers in road engineering to improve the high temperature performance, anti-aging performance, and resistance of the road surface. Fatigue performance, etc. In road engineering, rubber powder is mainly used for the modification of rubber asphalt, rubber asphalt concrete and cement mortar.
1. Rubber Asphalt
Rubber asphalt can be used in road engineering for rubber asphalt waterproof bonding layer, gravel seal layer, pavement waterproof material and joint filler, etc., effectively improve the road surface frost resistance, crack resistance, fatigue resistance, and prevent moisture from affecting the asphalt pavement 2YLYY618 Impact. In actual production, rubber powder can be directly shared with asphalt, or surface-modified rubber powder can be shared with asphalt, or aromatic hydrocarbon additives can be added to rubber powder and asphalt, or a certain amount of rubber powder/asphalt can be added Natural rubber.
2. Rubber Asphalt Concrete
Rubber asphalt concrete is a material prepared by blending rubber powder, mineral aggregate and asphalt. It mainly includes low-noise rubber asphalt concrete and anti-cracking rubber asphalt concrete. It is mainly used for road noise reduction and old road reconstruction. In actual production, the addition of rubber powder can significantly increase the elasticity and damping of asphalt concrete, and improve the bearing capacity and crack resistance of the pavement. In actual production, the use of high-viscosity rubber asphalt can achieve a good noise reduction effect, and mixing an appropriate amount of rubber powder in asphalt concrete can significantly reduce the asphalt surface while improving the crack resistance of the pavement.
3. Modification of cement mortar
When the cement mortar is modified with rubber powder, the common method is to replace the ordinary aggregate with the rubber powder according to the volume fraction of the fine aggregate in the mortar. In the preparation process of rubber powder modified cement mortar, the density, compressive strength, water resistance, heat insulation, sound insulation and other changes of the cement mortar after adding rubber powder should be fully considered. Under normal circumstances, the rubber powder used in modified cement mortar should not be too high. As for the specific application skills of rubber powder in cement mortar, the editor will discuss with you in detail later.
Road engineering is one of the main battlefields for the recycling of rubber powder. Continuous research on the application skills of waste rubber powder in road engineering can further expand the scope of application of rubber powder, which will help solve the problem of large accumulation of waste rubber and waste tires, environmental pollution, and economic improvement. Benefits are of great significance.
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