Kieselguhr based asphalt mixture high-and-low temperature modifier and preparation method thereof

A soil-based asphalt and mixture technology, which is applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of limited improvement in high temperature performance of asphalt mixture, affecting asphalt pavement fatigue damage, and no significant improvement in low temperature performance. Outstanding sexual effect, significant cooling effect, cost-effective effect

Active Publication Date: 2016-12-07
CHINA ACAD OF TRANSPORTATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are still some problems in the existing diatomite as an asphalt mixture modifier: diatomite modifier is a natural material with low material purity and poor activity; the improvement of the high temperature performance of asphalt mixture is limited, and the low temperature performance has not been sig

Method used

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  • Kieselguhr based asphalt mixture high-and-low temperature modifier and preparation method thereof
  • Kieselguhr based asphalt mixture high-and-low temperature modifier and preparation method thereof
  • Kieselguhr based asphalt mixture high-and-low temperature modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1:

[0032] Preparation formula of high and low temperature modifier for diatomite-based asphalt mixture:

[0033] Table 1. Formulation of one embodiment of a diatomite-based modifier according to the present invention

[0034]

[0035] Preparation:

[0036] 1) The diatomite raw ore is first crushed to a particle size of less than 40cm by a roller machine, and then enters the scrubbing machine through a conveyor belt. After scrubbing into a slurry, it enters the slurry mixing tank through a pipeline, and a large mixer is used to agitate the slurry. Separate the soil and sand, use a hydrometer to test the concentration of the slurry to 10-15%, then use a filter press to dry the slurry, and finally enter the dryer for drying. When it is less than 5%, take out the diatomite from the dryer, which is high-purity activated diatomite;

[0037] 2) Weigh the high-purity activated diatomite, rock asphalt, and waste rubber powder according to the weight ratio, and th...

Example Embodiment

[0039] Example 2:

[0040] Preparation formula of high and low temperature modifier for diatomite-based asphalt mixture:

[0041] Table 2. Formulation of another embodiment of a diatomite-based modifier according to the present invention

[0042]

[0043] Preparation:

[0044] With reference to the method of Example 1, the high and low temperature modifier of diatomite-based asphalt mixture of this example was prepared.

Example Embodiment

[0045] Example 3:

[0046] Preparation formula of high and low temperature modifier for diatomite-based asphalt mixture:

[0047] Table 3. Formulation of another embodiment of a diatomite-based modifier according to the present invention

[0048]

[0049] Preparation:

[0050] With reference to the method of Example 1, the high and low temperature modifier of diatomite-based asphalt mixture of this example was prepared.

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Abstract

The invention discloses a kieselguhr based asphalt mixture high-and-low temperature modifier and a preparation method thereof. The kieselguhr based asphalt mixture high-and-low temperature modifier specifically comprises, by weight, 70-80 parts of high-purity activated diatomite, 10-20 parts of rock asphalt, 10-20 parts of waste crumb rubber and 0-20 parts of polymer. The kieselguhr based modifier used for improvement high-and-low temperature pavement performance of the asphalt mixture is convenient in adding, good in dispersion effect, low in mixture modifying cost, excellent in the high-and-low temperature pavement performance of the asphalt mixture and capable of remarkably reducing pavement surface temperature of asphalt pavement.

Description

technical field [0001] The invention relates to the field of road engineering materials, in particular to a diatomite-based asphalt mixture high and low temperature modifier and a preparation method thereof. Background technique [0002] Diatomite is a typical siliceous mineral rock, which has been developed and utilized in many countries in the world. Diatomite is rich in reserves and is one of the non-metallic minerals with wide distribution and rich resources in the world. It is mainly distributed in the United States, China, France, Denmark and other countries. [0003] After the 1990s, my country's Yunnan, Jilin, Shaanxi and other regions gradually began to use diatomite as a modifier for asphalt mixture related research work. Studies have shown that after diatomite is added to asphalt mixture, the high temperature of the road surface Anti-rutting ability, water stability and anti-fatigue performance are all provided to a certain extent, and its modification principle i...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L19/00C08L23/12C08L23/06C08K3/34
CPCC08L19/003C08L23/06C08L95/00C08L2205/025C08L2205/03C08L2205/035C08L2207/062C08L2207/066C08L2555/50C08L2555/80C08L2555/86C08K3/34C08L23/12
Inventor 王书杰王文辉赵蔚杜卫峰褚建锋罗树兵王君许万平刘谦
Owner CHINA ACAD OF TRANSPORTATION SCI
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