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Nano composite asphalt modifier and preparation method thereof

An asphalt modifier and nano-composite technology, which is applied in the field of asphalt additives, can solve the problems of limited asphalt performance improvement, inability to use direct-injection applications, and small particle size of nanoparticles to achieve increased lipophilicity, low cost, and improved dispersion sexual effect

Active Publication Date: 2019-12-13
JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent CN201610353889.0 adopts thermoplastic styrene-butadiene rubber, modified styrene-butadiene rubber, recycled polyethylene materials, recycled EVA, cross-linking agent, stabilizer, and adopts melt extrusion to prepare a high-viscosity modifier and prepare a high-viscosity modifier. Viscosity-modified asphalt, but there are many types of polymers used, slow dissolution in asphalt, and long dispersion time
The method disclosed in Chinese patent CN201510608457.5 is to add styrene copolymer, Sasobit modifier, Eucommia gum, styrene-butadiene rubber, sulfur, etc. to the base asphalt to prepare modified asphalt. This patent cannot be used for direct investment and long-term storage Still have problems with modifier segregation
This method is to add nanomaterials and polymers into the base asphalt and continue to stir to disperse and mix evenly. However, due to the small particle size of the nanoparticles and the lack of surface treatment of the nanomaterials, it is difficult to fully mix them evenly through simple mixing and swelling.
Failure to fully utilize the size effect of nanomaterials has limited effect on improving the performance of asphalt

Method used

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  • Nano composite asphalt modifier and preparation method thereof

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Experimental program
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preparation example Construction

[0064] The preparation method of nanocomposite asphalt modifier in addition comprises the following steps,

[0065] Step (1): For the treatment of nanomaterials, weigh each component according to the above ratio for use, then mix and stir xylene and oleic acid evenly, add nanomaterials, and add triethanolamine, continue to stir and react to obtain modified nanomaterials ;

[0066] Step (2): Stir and mix the modified nanomaterial obtained in step (1), thermoplastic styrene elastomer, regenerated rubber powder, regenerated polyethylene material, vulcanizing agent, and maleic anhydride-grafted PE to obtain a blend thing;

[0067] Step (3): The blend obtained in step (2) is extruded and granulated in an extruder to obtain a high-viscosity asphalt modifier.

[0068] After adding triethanolamine in step (1), react at 100°C for 5 hours, cool down to room temperature, filter, wash with ethanol and deionized water several times, and dry the obtained precipitate, and step (1) The con...

Embodiment 1

[0072] (1) Mix and stir 2800g xylene and 1200g oleic acid evenly, add 120g of nano-silicon dioxide, and add 600g of triethanolamine, continue to stir, and react at 100°C for 5h, cool down to room temperature, filter, The obtained precipitate is dried after being washed with ethanol and deionized water several times to obtain modified nano silicon dioxide, and the contact angle of the nano material is greater than 100°.

[0073] (2) 30g of modified nano silica, 500g of SBS with a melt index of 5g / 10min, 300g of recycled rubber powder, 400g of recycled polyethylene material with a melt index of 4g / 10min, 12g of maleic anhydride grafted PE, Mix 10g of vulcanizing agent in a high-speed mixer at a mixing temperature of 80°C for 5 minutes to achieve a blend

[0074] (3) The blend is melt-extruded and granulated in a twin-screw extruder to obtain a high-viscosity modifier 1. The extrusion temperature is 120-180° C., and the screw speed is 40-400 r / min.

Embodiment 2

[0076] (1) Mix and stir 60g of xylene and 20g of oleic acid evenly, add 2g of nanoclay, and add 10g of triethanolamine, continue to stir, and react at 100°C for 5h, then cool down to room temperature, filter, and wash with ethanol 1. After washing with deionized water for many times, the obtained precipitate is dried to obtain a modified nanomaterial, and the contact angle of the nanomaterial is greater than 100°.

[0077] (2) 40g of modified nanoclay, 300g of SIS with a melt index of 0.1g / 10min, 400g of recycled rubber powder, 200g of recycled polyethylene material with a melt index of 8g / 10min, 3g of maleic anhydride grafted PE, Mix 10g of vulcanizing agent in a high-speed mixer at a mixing temperature of 80°C for 5 minutes to achieve a blend

[0078] (3) The blend is melt-extruded and granulated in a twin-screw extruder to obtain the high-viscosity modifier 2. The extrusion temperature is 120-180° C., and the screw speed is 40-400 r / min.

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Abstract

The invention discloses a nanometer compound asphalt modifying agent and a preparation method thereof. The modifying agent comprises the following components in parts by weight: 3 to 5 parts of a nanometer nanometer material; 30 to 50 parts of thermoplastic styrene elastomers; 30 to 40 parts of a regenerated rubber powder; 20 to 40 parts of a regenerated polyethylene material; 1 to 2 parts of a vulcanizing agent; the dosage of maleic anhydride grafted PE is 1.5 to 3 percent of that of the regenerated polyethylene material. The nanometer compound asphalt modifying agent has the advantages that surface treatment is firstly performed on nanometer material, the lipophilicity of the nanometer material is improved, the dispersity of the nanometer material in asphalt is improved, the mixing of the nanometer material into the modifying agent can further improve the high and low temperature stability of the modified asphalt with the modifying agent being added.

Description

technical field [0001] The invention relates to the technical field of asphalt additives, in particular to a nanocomposite asphalt modifier and a preparation method thereof. Background technique [0002] Sponge city construction requires large-pore asphalt drainage pavement. The most critical material for laying drainage asphalt pavement is asphalt binder. Ordinary modified asphalt is used as the binder of drainage pavement, which has problems such as low viscosity, insufficient thickness of aggregate coating, and low durability of pavement under heavy-duty traffic. Therefore, high-viscosity modified asphalt is the best choice for asphalt used in laying drainage pavements. [0003] High-viscosity modified asphalt has the characteristics of high viscosity, good elastic recovery, and a viscosity greater than 20,000 Pa·s at 60°C, which can significantly reduce the expansion of reflective cracks and improve the high and low temperature performance, water damage performance, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L17/00C08L23/06C08L51/06C08K9/04C08K3/36C08K3/22C08K3/34
CPCC08K2003/2296C08K2201/011C08L17/00C08L23/06C08L53/02C08L95/00C08L2201/08C08L2205/02C08L2205/035C08L2207/04C08L2207/20C08L2207/24C08L51/06C08K9/04C08K3/36C08K3/22C08K3/346C08L53/025C08K3/34
Inventor 关永胜徐德根陈香陈李峰刘杰李经纬王帅
Owner JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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