High-viscosity asphalt and preparation method thereof

A technology of high-viscosity asphalt and matrix asphalt, which is applied in building components, building insulation materials, construction, etc., can solve the problems of poor durability and weather resistance, high low-temperature brittleness, weathering cracks, etc., and achieve high durability and weather resistance, Low temperature brittleness and low production cost

Inactive Publication Date: 2013-12-04
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, high-viscosity asphalt is mainly prepared by modifying base asphalt with polymer or natural lake asphalt. Although the viscosity of high-viscosity asphalt prepared by modifying polymer or natural lake asphalt can reach more than 220,000 Pa.S at 60°C, it is The low-temperature brittleness is relatively large, and the durability and weather resistance are relatively poor. Under normal circumstances, cracking and weathering cracks will occur after about one year of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Firstly, activate the commercially available waste concrete powder and grind it into activated waste concrete powder for future use. The method is as follows:

[0033] (1) Mix waste concrete powder and powdered sodium silicate and heat it to 250-350°C and keep it warm for 1-2 hours. The weight of powdered sodium silicate added is 1%-3% of the weight of waste concrete powder, and then cool down to room temperature;

[0034] (2) Mix and grind the mixture of waste concrete powder and powdery sodium silicate obtained in step (1) with desulfurized gypsum and admixture for 15-60 minutes. The weight of the mixture is 1%-5%, the weight of the admixture is 1%-3% of the weight of the mixture of waste concrete powder and powdered sodium silicate, and it is ground to a specific surface area greater than 450 m 2 / kg of powder to obtain activated waste concrete powder; the admixture is one or more of slaked lime, sulfoaluminate, Portland cement clinker, and triethanolamine; the abov...

Embodiment 2

[0049] Firstly, the commercially available waste concrete powder is activated and ground into activated waste concrete powder for future use. The specific activation treatment method is the same as in Example 1.

[0050] Weigh the following raw materials to prepare additives:

[0051] Raw material 1: Aluminum slag powder 1kg,

[0052] Steel slag powder 25kg,

[0053] Alkali slag powder 32kg,

[0054] Activated waste concrete powder 42kg,

[0055] Raw material 2: water 20kg;

[0056] The preparation method of additive is the same as embodiment 1.

[0057] Take by weighing 4kg of the additive prepared by the above method, 3kg of epoxy resin (commercially available, the same below); 93kg of No. 70 asphalt; first mix the additive and the commercially available No. 70 asphalt in a commercially available high-shear mixer (or commercially available colloid Grinding) for 3 minutes, the temperature is controlled at 180 ° C, and finally epoxy resin is added and stirred for 5 minute...

Embodiment 3

[0061] Firstly, the commercially available waste concrete powder is activated and ground into activated waste concrete powder for future use. The activation treatment method is the same as in Example 1.

[0062] Weigh the following raw materials to prepare additives:

[0063] Raw material 1: Aluminum slag powder 2kg,

[0064] Steel slag powder 28kg,

[0065] Alkali slag powder 40kg,

[0066] Activated waste concrete powder 30kg,

[0067] Raw material 2: water 25kg;

[0068] The preparation method of additive is the same as embodiment 1.

[0069] Take by weighing 3kg of the additive prepared by the above method, 2kg of epoxy resin (commercially available, the same below); 95kg of No. 70 asphalt; first put the additive and the commercially available No. 70 asphalt in a high-shear mixer (such as Chengdu Xindu Yongtong Machinery Co., Ltd. The high-shear mixer produced by the factory) was mixed for 3 minutes, and the temperature was controlled at 170 ° C. Finally, epoxy resin ...

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Abstract

The invention discloses high-viscosity asphalt and a preparation method thereof. The high-viscosity asphalt consists of matrix asphalt, epoxy resin and an additive. The additive is prepared from the following raw material 1 and raw material 2: the raw material 1 consists of the following components in percentage by weight: 1 to 3 percent of aluminum slag powder, 25 to 30 percent of steel slag powder, 25 to 40 percent of alkali slag powder and 30 to 45 percent of activated waste concrete powder; the raw material 2 is water; the water is 20 to 30 percent of the total weight of the raw material 1. The high-viscosity asphalt consists of the following components in percentage by weight: 88 to 96 percent of matrix asphalt, 1 to 5 percent of epoxy resin and 3 to 7 percent of an additive. The high-viscosity asphalt has the characteristics of low low-temperature brittleness, high durability, high weather resistance and high viscosity at 60 DEG C.

Description

Technical field [0001] The invention involves modified asphalt, which is specifically a high -viscosity asphalt and its preparation method. Background technique [0002] High viscosity asphalt refers to the modified asphalt with a viscosity of 60 ° C greater than 200000PA.S.The existing technology's permeable asphalt pavement is mainly porous asphalt pavement. The raw material uses permeable asphalt mixture. This asphalt mixture is characterized by the pore rate greater than 25%, while the pore rate of ordinary asphalt mixture is only 2-4%.Due to the characteristics of high pore rate, ordinary asphalt is not applicable to the preparation of permeable asphalt mixture. Generally, high -viscosity asphalt is used to prepare permeable asphalt mixture.At present, the high viscosity asphalt is mainly made of polymer or natural lake asphalt to modify the matrix asphalt. Although the highly viscosity asphalt 60 ° C of the polymer or natural lake asphalt can also reach 2200000Pa.s, it is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L63/00C08K9/02C08K3/34C08K3/30C08K11/00
Inventor 孙家瑛高先芳肖天翔
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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