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Rubber asphalt and preparation method thereof

A technology of rubber asphalt and rubber powder, which is applied in the field of rubber asphalt and its preparation, and can solve the problems of difficulty in meeting the requirements of various indicators of asphalt, low utilization rate, limited absorption of silicon product waste residue, etc.

Inactive Publication Date: 2020-09-18
甘禄祥
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned process of applying silicon product waste residue to rubber asphalt alleviates the remaining amount of silicon product waste residue to a certain extent, the maximum utilization rate of silicon product waste residue does not exceed 8% due to the limited absorption of silicon product waste residue by asphalt. For the ever-increasing waste residue of silicon products, the utilization rate is low. If the amount of waste residue of silicon products is increased, the various indicators of asphalt will be difficult to meet the requirements

Method used

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  • Rubber asphalt and preparation method thereof
  • Rubber asphalt and preparation method thereof

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preparation example Construction

[0022] The invention provides a kind of preparation method of asphalt rubber, comprising the following steps:

[0023] (1) mixing activator, silicon product waste residue and waste tire rubber powder to obtain modified rubber powder;

[0024] (2) The modified rubber powder obtained in the step (1) is mixed with matrix asphalt to carry out thermal cracking reaction to obtain rubber asphalt;

[0025] The rubber asphalt is prepared from raw materials comprising the following mass percentages:

[0026] 0.1wt%-0.5wt% activator, 10wt%-15wt% silicon product waste residue, 25wt%-35wt% waste tire rubber powder and 50wt%-60wt% matrix asphalt.

[0027] Based on the weight ratio of asphalt rubber as 100%, the raw material for preparing asphalt rubber of the present invention includes 0.1wt% to 0.5wt% of activator, preferably 0.2wt% to 0.3wt%, more preferably 0.25wt% to 0.3wt% %. In the present invention, the activator is preferably a nonionic surfactant, more preferably 2,4,7,9-tetrame...

Embodiment 1

[0040] Taking the weight ratio of rubber asphalt as 100%, the raw material is 0.3wt% of 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 15wt% organic silicon waste residue (with a particle size of 210 ~230 mesh), 34.7wt% waste tire rubber powder (grain size is 20~40 mesh, natural rubber hydrocarbon content greater than 30%) and 50wt% matrix asphalt.

[0041] Step (1) Fully mix 2,4,7,9-tetramethyl-5-decyne-4,7-diol, organic silicon waste residue and waste tire rubber powder at normal temperature and pressure to obtain modified rubber powder ;

[0042] Step (2) Add the modified rubber powder obtained in the step (1) to the base asphalt at 120°C and mix evenly, then react in a reactor at 200°C for 1.5min to obtain black solid rubber asphalt.

Embodiment 2

[0044] Taking the weight ratio of rubber asphalt as 100%, the raw material is 0.2wt% of 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 10wt% organic silicon waste residue (with a particle size of 210 ~230 mesh), 29.8wt% waste tire rubber powder (grain size is 20~40 mesh, natural rubber hydrocarbon content is greater than 30%) and 60wt% matrix asphalt.

[0045] Step (1) Fully mix 2,4,7,9-tetramethyl-5-decyne-4,7-diol, organic silicon waste residue and waste tire rubber powder at normal temperature and pressure to obtain modified rubber powder ;

[0046] Step (2) Add the modified rubber powder obtained in the step (1) to the base asphalt at 120°C and mix evenly, then react in a reactor at 200°C for 1.5min to obtain black solid rubber asphalt.

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Abstract

The invention provides a preparation method of rubber asphalt. The preparation method comprises the following steps: mixing an activator, silicon product waste residues and waste tire rubber powder toobtain modified rubber powder; and mixing the modified rubber powder with matrix asphalt, and performing a thermal cracking reaction to obtain the rubber asphalt. The rubber asphalt is prepared from0.1-0.5 wt% of the activator, 10-15 wt% of the silicon product waste residues, 25-35 wt% of the waste tire rubber powder and 50-60 wt% of the matrix asphalt. Physical and chemical methods are combined, the waste tire rubber powder is modified with the activator and the silicon product waste residues, physical mixing is matched, under the shearing action, the interface state of the waste tire rubber powder is changed, the compatibility of the waste tire rubber powder and the matrix asphalt is improved, the utilization rate of the silicon product waste residues is increased, and the rubber powder and the asphalt are promoted to form a stable system and are not separated, so the performance of the rubber asphalt is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rubber asphalt wet processing, and in particular relates to a rubber asphalt and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of different molecular weight hydrocarbons and their non-metallic derivatives. It can be used as a binder for flexible pavement construction. It has good adhesion, impermeability, insulation and chemical stability. , is an indispensable material in road construction. [0003] Asphalt (base asphalt) itself is an economical pavement material, but due to the temperature sensitivity of asphalt, its rigidity and strength decrease at high temperatures, resulting in softening of the pavement, and low temperature is prone to shrinkage cracks and other pavement cracking phenomena, which must be improved properties to improve its mechanical properties at high and low temperatures. Waste tire powder contains various polymers su...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L19/00C08K11/00C08K5/053
CPCC08L95/00C08L2207/24C08L19/003C08K11/005C08K5/053
Inventor 甘禄祥李正才甘建利陈世强陈江
Owner 甘禄祥
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