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Direct vat set modifier of cast asphalt mixture and preparation method

An asphalt mixture, direct-injection technology, applied in building insulation materials, building components, buildings, etc., can solve the problems of unstable mixture performance and modified asphalt performance, and avoid attenuation, segregation, and high temperature on the road surface. Excellent performance, low temperature resistance and good fatigue performance

Inactive Publication Date: 2014-08-13
CHONGQING SINO CANADA ASPHALT TECHN SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The benefit of the present invention is to provide a direct injection modifier for castable asphalt mixture that can be directly put into the mixing tank of the mixing plant without modifying the asphalt in advance. The problem of unstable performance of the mixture caused by storage segregation

Method used

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  • Direct vat set modifier of cast asphalt mixture and preparation method
  • Direct vat set modifier of cast asphalt mixture and preparation method
  • Direct vat set modifier of cast asphalt mixture and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) the preparation of direct throw modifier, described modifier is made up of the following components of parts by weight:

[0019]

[0020] The ethylene styrene copolymer is specifically a mixture of 45 parts of SBS791H produced by Dushanzi and 45 parts of SBS445233 parts of Yanshan Petrochemical;

[0021] The plastic is specifically PVC;

[0022] Described rubber powder is specifically radial tire regenerated rubber powder;

[0023] Described filling powder is specifically ground calcium carbonate;

[0024] Described fusion oil is Hengshui furfural extraction oil;

[0025] Described dispersion aid is calcium stearate;

[0026] Described crosslinking auxiliary agent is maleic anhydride;

[0027] Mix the above components evenly and pour them into a granulator to melt and granulate.

[0028] Castable asphalt mixture is produced according to the following steps:

[0029] First, add the mineral material preheated at about 240 degrees (see Table 1 for gradation an...

Embodiment 2

[0041] The preparation of direct throw modifier, it is made up of the following components of parts by weight:

[0042]

[0043] The ethylene styrene copolymer is specifically formed by mixing 20 parts of Dushanzi SBS791H and 10 parts of Yanshan Petrochemical SBS4452;

[0044] The plastic is specifically Dongguan Juntai HDPE;

[0045] Described rubber powder is specifically radial tire regenerated rubber powder;

[0046] Described fusion oil is aromatic hydrocarbon oil;

[0047] Described dispersing aid is Fischer-Tropsch wax;

[0048] Described crosslinking auxiliary agent is isocyanate;

[0049] Mix the above components evenly and pour into the granulator to melt and granulate.

[0050] Castable asphalt mixture is produced according to the following steps:

[0051] First, add the mineral material preheated at about 240 degrees (see Table 3 for gradation and origin) into the mixing tank and mix evenly.

[0052] Second, add the weighed base asphalt (the ratio of aspha...

Embodiment 3

[0063] (1) Take various components by weighing the following parts by mass to prepare the direct-throwing modifier:

[0064]

[0065] The styrene-based thermoplastic elastomer is SEBS, which is a linear three-block copolymer with polystyrene as the end segment and ethylene-butene copolymer obtained by hydrogenation of polybutadiene as the middle elastic block.

[0066] The plastic is specifically Shuangdi Trading LLDPE;

[0067] Described rubber powder is specifically radial tire regenerated rubber powder;

[0068] The filler powder is specifically talcum powder;

[0069] Described fusion oil is rubber filler oil;

[0070] Described dispersing aid is vinyl stearic acid amide (EBS);

[0071] Described cross-linking auxiliary agent is sulfur powder;

[0072] Mix the above components evenly and pour into the granulator to melt and granulate.

[0073] Castable asphalt mixture is produced according to the following steps:

[0074] First, add the mineral material preheated at...

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Abstract

The invention discloses a direct vat set modifier of a cast asphalt mixture and is characterized in that the modifier is composed of the following components, by weight, 30-80 parts of a styrenic thermoplastic elastomer, 10-20 parts of plastic, 1-10 parts of rubber powder, 1-5 parts of a packing powder, 5-40 parts of fuser oil, 5-30 parts of a dispersing auxiliary agent and 0.1-5 parts of a crosslinking auxiliary agent. The invention also discloses a preparation method of the modifier and an asphalt mixture prepared from the modifier. The material can be directly put into a mixing plant cylinder to produce modified asphalt concrete. The produced asphalt concrete completely satisfies engineering needs. In comparison with a traditional SBS modification process, the method provided the invention has the following advantages: the step of producing modified asphalt in a traditional method is saved; production equipment of modified asphalt is save; there is no need in hot storage of modified asphalt; performance attenuation and separation of modified asphalt under hot storage condition are avoided; and positive contributions are made to low temperature and fatigue performance of the asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of traffic pavement overlay materials, in particular to a pouring asphalt mixture direct injection modifier and a preparation method thereof. Background technique [0002] In recent years, with the development of economic construction, my country's highways have also achieved unprecedented development and achieved world-renowned achievements, but road surface damage in different degrees cannot be ignored. According to incomplete statistics, the flow deformation of asphalt pavement is the most common. It is also found in the statistics that about 70-80% of the pavement damage is caused by rutting. In order to solve this problem, the most common method is to modify the conventional base asphalt, usually by adding polymer modifiers (such as PE, SBS, EVA) or even adding a lot of auxiliary materials to meet other performance requirements. additives (such as anti-stripping agent, penetrating agent), etc., the mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L27/06C08L23/08C08L23/06C08L17/00C08K13/02C08K3/26C08K5/098C08K5/1539C08K5/29C08K3/34C08K3/06C08L95/00
Inventor 梁志中陈仕周张文余能权
Owner CHONGQING SINO CANADA ASPHALT TECHN SERVICE
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