Nano-rubber powder modifier

Abstract

The invention relates to the field of rubber powder preparation, in particular to a nano-rubber powder modifier for improving high-temperature stability performance of pitch. The nano-rubber powder modifier for improving the high-temperature stability performance of the pitch is prepared from 2-3 parts of degradation inhibitor, 2-3 parts of nano calcium carbonate, 1-2 parts of nanosized silica, 1-2 parts of bisphenol A epoxy resin, 1-4 parts of organic sulfur adsorbent, 2-5 parts of co-solvent, 3-6 parts of limestone, 2-5 parts of ammonium hydroxide, 3-6 parts of desulfurizer, 2-7 parts of mono-aromatic hydrocarbon, 4-6 parts of organic acid, 1-4 parts of metal chloride, 2-4 parts of inorganic acid, 3-5 parts of regenerative active agent, 1-3 parts of rubber powder, 2-3 parts of emulsifier, 1-4 parts of softening agent and 2-5 parts of activator, wherein the grain size of the nano calcium carbonate and the nanosized silica is 30-50 nm, the raw materials are put into a stirring tank forstirring, then steam is introduced, warm water is injected as a heat-transfer medium, a dilute base solution is added to form paste, water is added for dilution twice, and then extraction is conducted in a vacuum environment at 2.0 Mpa to obtain the modifier.

Description

technical field [0001] The invention relates to the field of rubber powder preparation, in particular to a nanometer rubber powder modifier for improving the high-temperature stability of asphalt and reducing viscosity and energy consumption. Background technique [0002] In the prior art, the high-temperature instability and low-temperature cracking of rubber powder modified asphalt are difficult problems to solve. The production temperature of the existing rubber powder modified asphalt is 180-190°C, which is relatively high and consumes a lot of energy. , and the viscosity is relatively high, and high temperature is also required during construction; moreover, when the rubber powder is added to the asphalt, it is easy to make the asphalt mixture more difficult to handle (easy to stick), which increases the operation time and reduces the work efficiency. Sometimes asphalt containing a large amount of rubber powder is easy to catch fire during the melting process. At presen...

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Problems solved by technology

[0002] In the prior art, the high-temperature instability and low-temperature cracking of rubber powder modified asphalt are difficult problems to solve. The production temperature of the existing rubber powder modified asphalt is 180-190°C, which is relatively high and consumes a lot of energy. , and the viscosity is relatively high, and high temperature is also required during construction; moreover, when the rubber powder is added to the asphalt, it is easy to make the asphalt mixture more difficult to handle (easy to stick), which increases the operation time and reduces the work efficiency

Sometimes asphalt containing a large amount of rubber powder is easy to catch fire during the melting process. At present, rubber powder modified asphalt is more difficult in terms of construction and actual quality control. Many properties that are not conducive to construction and quality control need to be improved to solve its flammability and viscosity. Too large is the key aspect to improve the quality of rubber powder modified asphalt