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Coated asphalt, asphalt felt and preparation method and application of asphalt felt

A kind of asphalt felt and coating technology, which is applied in the direction of coating, textiles and papermaking, etc., can solve the problems of water erosion, hidden safety hazards of storage tanks, broken foam glass bricks, etc., achieve good high and low temperature performance and water damage resistance, and improve Effect of pressure bearing capacity and uniformity, excellent compressive strength

Pending Publication Date: 2020-11-17
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the heavy weight of the LNG storage tank and the low pressure bearing capacity of the foam glass cold insulation layer, foam glass bricks often break during on-site cold insulation construction, resulting in economic losses
Foam glass brick is a kind of porous inorganic material with rough surface and strong brittleness. Multi-layer foam glass bricks are stacked and squeezed each other, resulting in uneven laying surface, which brings hidden danger to the safety of storage tanks.
Due to the large temperature difference from the inside to the outside of the LNG storage tank, the water vapor in the outside air is easy to condense and adhere to the tank body, causing moisture erosion and shortening the service life of the storage tank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment provides a kind of coated asphalt, comprising the following components by weight:

[0053] 60 parts by weight of oxidized pitch;

[0054] Modifier 1.5 parts by weight;

[0055] Inorganic filler 33 parts by weight.

[0056] Wherein, the oxidized asphalt comprises 65 parts by weight of base pitch, 20 parts by weight of side line oil and 3 parts by weight of catalyst; wherein the model of base bitumen is AH-110, the model of side line oil is minus three line oil, and the catalyst is P 2 o 5 ; The preparation method of oxidized asphalt includes: mixing the above-mentioned base asphalt, side line oil and catalyst, at a temperature of 200 ° C, and a ventilation rate of 0.05m 3 Oxidation for 10h under the condition of / h kg; the softening point of oxidized asphalt at 25°C is 108°C, and the penetration (0.1mm) at 25°C is 62; the modifiers are APAO and PE, and the ratio of APAO and PE is added The ratio is 1:1; the inorganic filler is slag powder, and the add...

Embodiment 2

[0066] This embodiment provides a kind of coated asphalt, comprising the following components by weight:

[0067] 65 parts by weight of oxidized pitch;

[0068] Modifier 2 parts by weight;

[0069] Inorganic filler 29 parts by weight.

[0070] Wherein, the oxidized asphalt comprises 80 parts by weight of base pitch, 20 parts by weight of side line oil and 2 parts by weight of catalyst; wherein the model of base bitumen is 140#, the model of side line oil is minus four line oil, and the catalyst is FeCl 3 ; The preparation method of oxidized asphalt includes: mixing the above-mentioned base asphalt, side line oil and catalyst, at a temperature of 190 ° C, and a ventilation rate of 0.10 m 3 Oxidation for 10 hours under the condition of / h·kg; the softening point of oxidized asphalt is 97, the penetration (0.1mm) at 25°C is 64, the modifiers are APAO and APP, the dosage ratio of APAO and APP is 2:1, inorganic filler It is talcum powder, and the added amount is 45 parts by weig...

Embodiment 3

[0080] This embodiment provides a kind of coated asphalt, comprising the following components by weight:

[0081] 75 parts by weight of oxidized pitch;

[0082] Modifier 0 parts by weight;

[0083] Inorganic filler 33 parts by weight.

[0084] Wherein, the oxidized asphalt comprises 60 parts by weight of base pitch, 15 parts by weight of side line oil and 3 parts by weight of catalyst; wherein the model of base bitumen is AH-110, the model of side line oil is catalytic oil slurry, and the catalyst is polyphosphoric acid; The preparation method of oxidized asphalt includes: mixing the above-mentioned base asphalt, side line oil and catalyst, at a temperature of 200°C and a ventilation rate of 0.08m 3 Oxidation for 10 hours under the condition of / h·kg; the softening point of oxidized asphalt is 112, and the penetration (0.1mm) at 25°C is 61; the modifier is PE; the inorganic filler is mineral powder, and the softening point of asphalt coated after adding mineral powder is 12...

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Abstract

The invention provides coated asphalt, an asphalt felt and a preparation method and application of the asphalt felt. The coated asphalt is prepared from the following components including, by weight,40-60 parts of oxidized asphalt and 15-40 parts of inorganic filler. The coated asphalt is obtained by firstly oxidizing matrix asphalt and then conducting filling with the inorganic filler, and has good high and low temperature performance and water damage resistance. The coated asphalt is applied to the asphalt felt, and the mass per unit area of each material contained in the asphalt felt is controlled, so that the asphalt felt is smooth in surface and uniform in thickness, can keep excellent flexibility at low temperature, can keep excellent heat resistance at high temperature, and has excellent compressive strength, tearing strength, shrinkage resistance and waterproof capacity; and in addition, the adaptability to foam glass bricks is excellent, the pressure bearing capacity and uniformity of the foam glass bricks can be remarkably improved, and the effects of water resistance, moisture resistance and shrinkage resistance are achieved on a cold insulation layer of an LNG storagetank.

Description

technical field [0001] The invention belongs to the technical field of asphalt materials, and relates to a coated asphalt, an asphalt felt and its preparation method and application, in particular to a coated asphalt, including the asphalt coated asphalt felt and its preparation method, and used as a cold insulation material in Applied in the cold insulation structure of liquefied natural gas storage tanks. Background technique [0002] LNG is a low-temperature cryogenic medium, and the storage environment should be lower than -162°C. It is stored in a low-temperature and atmospheric pressure storage tank. Therefore, the bottom of the LNG storage tank needs a cold insulation structure to maintain the temperature of the low-temperature medium in the storage tank, reduce the evaporation of the liquid, and keep cold The structure bears the weight of the inner tank and the liquid medium in the tank. In addition to reliable low temperature resistance and good thermal insulation p...

Claims

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Application Information

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IPC IPC(8): D06N7/00D06N3/00
CPCD06N7/0094D06N3/0015D06N3/0004D06N3/0063D06N2203/08D06N2209/065D06N2209/128
Inventor 韩凌姜有山刘延军曹传奇王衍法车金良裴晓光王志超王伟
Owner CHINA NAT OFFSHORE OIL CORP
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