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Namometer compound asphalt modifying agent and preparation method thereof

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

Active Publication Date: 2017-10-03
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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  • Namometer compound asphalt modifying agent and preparation method thereof
  • Namometer compound asphalt modifying agent and preparation method thereof
  • Namometer compound asphalt modifying agent and preparation method thereof

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preparation example Construction

[0044] The preparation method of nanocomposite asphalt modifier in addition comprises the following steps,

[0045] 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 ;

[0046] Step (2): The modified nanomaterial obtained in step (1), thermoplastic styrene elastomer, regenerated rubber powder, regenerated polyethylene material, vulcanizing agent, maleic anhydride grafted PE, stirred and mixed evenly to obtain a blend thing;

[0047] Step (3): extruding and granulating the blend obtained in step (2) in an extruder to obtain a high-viscosity asphalt modifier.

[0048]Wherein, after adding triethanolamine in step (1), react at 100°C for 5h, then cool down to room temperature, filter, and wash with ethanol and deionized water for several times, then dry the precipitate obtain...

Embodiment 1

[0052] (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, then 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°.

[0053] (2) with 30g modified nano silica, 500g melt index is the SBS of 5g / 10min, the regenerated rubber powder of 300g, 400g melt index is the regenerated polyethylene material of 4g / 10min, the maleic anhydride grafted PE of 12g, Mix 10g of vulcanizing agent in a high-speed mixer at a mixing temperature of 80°C for 5 minutes to achieve a blend

[0054] (3) The blend is melt-extruded and granulated in a twin-screw extruder to obtain the high-viscosity modifier 1. The extrusion temperature is 120-180° C., and the screw speed is 40-400 r / min.

Embodiment 2

[0056] (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 use 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°.

[0057] (2) with the nanoclay of 40g modification, 300g melt index is the SIS of 0.1g / 10min, the regenerated rubber powder of 400g, 200g melt index is the regenerated polyethylene material of 8g / 10min, the maleic anhydride grafted PE of 3g, Mix 10g of vulcanizing agent in a high-speed mixer at a mixing temperature of 80°C for 5 minutes to achieve a blend

[0058] (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] At the Central Urbanization Work Conference on December 12, 2013, it was proposed to give priority to using more natural forces to drain water, assuming natural accumulation, natural infiltration, and natural purification of "sponge cities". Sponge cities are becoming a hot spot in urban construction in my country. The construction of sponge cities 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 ...

Claims

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Application Information

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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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