Thermosetting vulcanized natural rubber modified asphalt material and preparation method thereof

A technology of natural rubber modification and asphalt materials, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of limited performance improvement, achieve the effects of reducing preparation difficulty, reducing temperature sensitivity, and improving performance

Active Publication Date: 2021-08-13
晏永
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there are mainly two technical methods adopted for natural rubber modified asphalt at home and abroad. The first method (for example, Chinese patent application number 201911388387.1 "Natural rubber modified asphalt and its preparation method") is simply to mix natural rubber (including solid Rubber block, liquid rubber) are added to the asphalt by stirring, high-speed shearing and other methods, and the high and low temperature performance of the asphalt is improved by increasing the elastic substance in the asphalt, but it is still a thermoplastic material, and the performance improvement is limited

Method used

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  • Thermosetting vulcanized natural rubber modified asphalt material and preparation method thereof
  • Thermosetting vulcanized natural rubber modified asphalt material and preparation method thereof
  • Thermosetting vulcanized natural rubber modified asphalt material and preparation method thereof

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Effect test

Embodiment 1

[0041] 1. Preparation of blank and comparative examples

[0042] (1) Blank example

[0043] Prepare according to the following steps: take 1000g of 70# base asphalt, heat and melt it in an oven at 140°C, add 40g of naphthenic oil, stir for 5min at 140°C and 500rpm, and then add 0.1% natural rubber per minute Emulsion speed After adding 80g of natural rubber emulsion, keep stirring during the addition process, stop stirring for 5 minutes after the addition is complete, and continue to develop in an oven at 110°C until no foam is generated to obtain a blank sample of natural rubber asphalt.

Embodiment 2

[0066] Embodiment 2 product performance test

[0067] Because the material of the present invention belongs to thermosetting material, the test mode of asphalt is not applicable, so evaluate the experimental group of the present invention that embodiment 1 makes according to the detection method of thermosetting rubber (specifically operate according to ASTM D638-2003 plastic tensile property standard test method) For samples 1 to 8, blank examples, and comparative samples, the tensile strength and elongation at break of the samples were tested at 23°C, and the softening point was added to characterize their thermosetting characteristics. The measured results are shown in Table 4: the thermosetting rubber asphalt material prepared by the present invention can greatly improve the performance of asphalt relative to thermoplastic vulcanized natural rubber modified asphalt, and the tensile strength and elongation at break are significantly improved. The low temperature cracking re...

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Abstract

The invention discloses a thermosetting vulcanized natural rubber modified asphalt material and a preparation method thereof. The thermosetting vulcanized natural rubber modified asphalt material comprises the following components: a rubber asphalt precursor, a vulcanizing agent and a reaction accelerator in a mass ratio of 500: 8.93-50.85: 0-5.08, and the rubber asphalt precursor comprises the following components: matrix asphalt, natural rubber latex and an oil-based compatibilizer in a mass ratio of 100: (8-20): (4-10). According to the invention, the oil-based compatibilizer is utilized to uniformly distribute the high-doping-amount natural rubber in the asphalt, the high-doping-amount vulcanizing agent is utilized to enable the natural rubber in the asphalt to be subjected to cross-linking reaction, and the vulcanized rubber and the asphalt form an IPN interpenetrating network structure, so that the natural rubber asphalt is converted into a thermosetting material from thermoplasticity; and the performance of the asphalt cement is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of road paving materials, and relates to an asphalt material, in particular to a thermosetting vulcanized natural rubber modified asphalt material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's economy, my country's freight vehicles have experienced structural changes in which the number of vehicles has decreased, the total tonnage has increased, and the load of a single vehicle has increased significantly. my country's expressways and national and provincial trunk lines are facing more severe challenges of heavy load and overload , put forward higher requirements on the anti-rutting performance and anti-fatigue performance of the pavement. In order to prolong the service life of asphalt pavement, it is necessary to use asphalt binder with better performance. At present, the mainstream method is to add modifiers to asphalt for physi...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L7/02C08L91/00C08K13/02C08K3/06C08K3/22C08K5/09
CPCC08L95/00C08K2003/2296C08L2205/03C08L2205/04C08L7/02C08L91/00C08K13/02C08K3/06C08K3/22C08K5/09
Inventor 晏永
Owner 晏永
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