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Bituminous mixture for heavy-load transportation road surface and preparation technology of bituminous mixture

A technology of asphalt mixture and processing technology, which is applied in the field of asphalt preparation, can solve problems such as reducing the wear resistance of asphalt mixture, affecting road traffic, and improving accidents, so as to improve compatibility, service life, and mechanical properties and the effect of improving physical properties

Active Publication Date: 2019-05-17
六安市共鑫道路材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When asphalt is used to pave roads, it will be crushed, cracked, and rutted due to heavy-duty vehicles after a period of use, and the service life is short, which not only greatly affects road traffic, but also gives The passing vehicles have brought safety hazards and increased the occurrence of accidents, which requires us to improve the mechanical strength and wear resistance of the road surface. In today's asphalt mixture preparation, polytetrafluoroethylene fibers are usually added to improve property, which greatly reduces the wear resistance of the asphalt mixture, causing us inconvenience

Method used

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  • Bituminous mixture for heavy-load transportation road surface and preparation technology of bituminous mixture

Examples

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Effect test

Embodiment 1

[0049] First, weigh aggregate, asphalt, stabilizer, compatibilizer, filler, polytetrafluoroethylene fiber, nano-silica in proportion, and set aside; then take nano-silica and polytetrafluoroethylene fiber, crush them, and put them into the mixer Stir, heat to 315°C after stirring evenly, and keep warm for 3h; reheat, heat up to 370°C, keep warm for 2h; hot press and sinter under 255MPa pressure to prepare material A; then weigh calcium sulfate whisker, silicone rubber in proportion and ethyl orthosilicate, put the silicone rubber into a stirring tank, add calcium sulfate whiskers, and stir at room temperature for 10 minutes; then add ethyl orthosilicate, stir evenly, degas under vacuum at room temperature, and place it for 24 hours to obtain an anti-wear agent; Then heat the asphalt to 180°C, turn on the mixing and shearing machine, then add the prepared material A, the prepared wear-resistant agent, aggregate and filler, and shear and stir for 20 minutes; continue to add stabi...

Embodiment 2

[0053] First, weigh aggregate, asphalt, stabilizer, compatibilizer, filler, polytetrafluoroethylene fiber, nano-silica in proportion, and set aside; then take nano-silica and polytetrafluoroethylene fiber, crush them, and put them into the mixer Stir, heat to 325°C after stirring evenly, keep warm for 4h; reheat, heat up to 375°C, keep warm for 3h; hot press and sinter under 260MPa pressure to prepare material A; then weigh calcium sulfate whisker, silicone rubber in proportion and ethyl orthosilicate, put silicone rubber into a stirring tank, add calcium sulfate whiskers, and stir at room temperature for 20 minutes; then add ethyl orthosilicate, stir evenly, degas under vacuum at room temperature, and place for 24 hours to obtain an anti-wear agent; Then heat the asphalt to 190°C, turn on the mixing and shearing machine, then add the prepared material A, the prepared wear-resistant agent, aggregate and filler, and shear and stir for 25 minutes; continue to add stabilizers, con...

Embodiment 3

[0057] First, weigh aggregate, asphalt, stabilizer, compatibilizer, filler, polytetrafluoroethylene fiber, nano-silica in proportion, and set aside; then take nano-silica and polytetrafluoroethylene fiber, crush them, and put them into the mixer Stir, heat up to 330°C after stirring evenly, and keep warm for 5h; reheat, heat up to 380°C, keep warm for 4h; hot press and sinter under 265MPa pressure to prepare material A; then weigh calcium sulfate whiskers and silicone rubber in proportion and ethyl orthosilicate, put silicone rubber into a stirring tank, add calcium sulfate whiskers, and stir at room temperature for 25 minutes; then add ethyl orthosilicate, stir evenly, vacuum degas at room temperature, and place for 24 hours to obtain an anti-wear agent; Then heat the asphalt to 195°C, turn on the stirring and shearing machine, then add the prepared material A, the prepared wear-resistant agent, aggregate and filler, and shear and stir for 30 minutes; continue to add stabilize...

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Abstract

The invention discloses a bituminous mixture for a heavy-load transportation road surface and a preparation technology of the bituminous mixture. The problems that under the current market condition,polytetrafluoroethylene fibers are used for modifying bituminous, but the polytetrafluoroethylene fibers have the defects that the abrasion-resistant property is poor, the hardness is low, the dimensional stability is poor and the like, and the abrasion resistance and the mechanical properties of the bituminous mixture are greatly influenced are solved; and aiming at the problems, nano-silicon dioxide is added to the bituminous, the polytetrafluoroethylene fibers are filled with the nano-silicon dioxide, the thermal conducting property of polytetrafluoroethylene fibers is appropriately improved, the creep resisting property of the polytetrafluoroethylene fibers is improved, large-area strip-shaped abrasive dust is prevented from being generated in the friction process of the bituminous mixture, and the abrasion resistance of the polytetrafluoroethylene fibers is improved. According to the bituminous mixture for the heavy-load transportation road surface and the preparation technology of the bituminous mixture, appropriate proportion is obtained through multiple experiments, the technology is reasonable, the mechanical strength and the abrasion resistance property of the bituminousmixture are effectively improved, the compatibility between the bituminous and components is further improved, and the bituminous mixture is more stable and is high in practicability.

Description

technical field [0001] The invention relates to the technical field of asphalt preparation, in particular to an asphalt mixture used for heavy-duty traffic pavement and its processing technology. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid. It is liquid and has a black surface and is soluble in carbon disulfide. Anti-corrosion organic gelling material. [0003] Asphalt can be mainly divided into three types, including coal tar pitch, petroleum pitch and natural asphalt, among which coal tar pitch is a by-product of coking; petroleum pitch is the residue after crude oil distillation; natural pitch is stored underground, and some form ore deposits or deposits on the surface of the earth's crust. [0004] Asphalt is mainly used in coatings, plastics, rubber and other industries as well as road paving, etc. It is an...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/20C04B14/14C04B22/02C04B24/34C04B14/24C04B16/08C04B16/0625C04B14/06C04B14/383C04B24/42C04B14/28C04B2103/0068Y02W30/91
Inventor 殷红平
Owner 六安市共鑫道路材料有限公司
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