Modified emulsified asphalt and preparation method thereof

A technology of emulsifying asphalt and modification, which is applied to building components, building insulation materials, buildings, etc., and can solve problems such as low solid content and high Engelder viscosity

Inactive Publication Date: 2017-06-06
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN 102120889 A discloses a SBS modified emulsified asphalt, which is prepared from base asphalt, SBS modifier, composite emulsifier, sulfur and hot wa

Method used

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  • Modified emulsified asphalt and preparation method thereof
  • Modified emulsified asphalt and preparation method thereof
  • Modified emulsified asphalt and preparation method thereof

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[0034] The present invention also provides the preparation method of the modified emulsified asphalt described in the above technical scheme, comprising the following steps:

[0035] (1) Mix liquid matrix asphalt with linear SBS, compatibilizer and sulfur, and obtain SBS modified asphalt after shearing;

[0036] (2) mixing emulsifier and hydrochloric acid, saponification reaction takes place to obtain soap liquid;

[0037] (3) the SBS modified asphalt obtained in the step (1) is mixed with the soap liquid obtained in the step (2) and the naphthenic distillate oil to obtain a mixed material;

[0038] (4) the mixed material obtained in the step (3) is mixed with the SBR latex to obtain a modified emulsified asphalt;

[0039] The time sequence of the steps (1) and (2) is not limited.

[0040] In the present invention, the raw material of base asphalt is preferably heated to obtain liquid base asphalt. The heating temperature is preferably 130-150°C, more preferably 140-145°C, a...

Embodiment 1

[0057] Weigh 800g of No. 70 heavy-duty asphalt and heat it to 185°C, add 35g of linear SBS, 12g of compatibilizer and 2.3g of sulfur into the base asphalt at the same time, and use high-speed shearing machine to shear and disperse for 90min to make SBS modified asphalt .

[0058] Mix 6g of emulsifier with 710g of hydrochloric acid heated to 70°C, adjust the pH to 2, and make soap.

[0059] The SBS modified asphalt was kept at a constant temperature of 120°C, and 32 g of SBS modified asphalt, viscosity reducer and soap solution were added to the colloid mill at the same time, and SBS modified emulsified asphalt was obtained after high-speed shearing.

[0060] Add 30g of SBR latex into SBS modified emulsified asphalt and stir for 2 hours to obtain modified emulsified asphalt. The test data are shown in Table 1.

Embodiment 2

[0062] Weigh 800g of No. 70 heavy-duty asphalt and heat it to 185°C. Add 36g of linear SBS, 24g of compatibilizer and 2g of sulfur to the base asphalt at the same time, and use high-speed shearing machine to shear and disperse for 120min to make SBS modified asphalt.

[0063] Mix 6g of emulsifier with 710g of hydrochloric acid heated to 60°C, adjust the pH value to 2.5, and make soap liquid.

[0064] The SBS modified asphalt was kept at a constant temperature of 140°C, and 48 g of SBS modified asphalt, viscosity reducer and soap solution were added to the colloid mill at the same time, and SBS modified emulsified asphalt was obtained after high-speed shearing.

[0065] Add 12g of SBR latex into SBS modified emulsified asphalt and stir for 6 hours to obtain modified emulsified asphalt. The test data are shown in Table 1.

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Abstract

The invention provides modified emulsified asphalt which is prepared from base asphalt, linear SBS, SBR latex, a compatibilizer, an emulsifier, sulfur, naphthenic base distillate oil and hydrochloride. The SBR latex is large in polarity and can improve the adhesion performance of the modified emulsified asphalt; the linear SBS can improve the viscosity and the ductility of the asphalt; the compatibilizer can promote compatibility of the linear SBS, the SBR latex and the base asphalt and improve the storage stability of the modified asphalt; the sulfur can improve the storage stability of the modified asphalt; the naphthenic base distillate oil can regulate the viscosity of modified emulsion; and as for the provided modified emulsified asphalt, the softening point is 70.5 DEG C, the ductility reaches up to 57 (5 DEG C ductility/cm), the solid content reaches up to 65 percent, the viscosity is 6.5 (E25/S), the storage stability is good, and the modified emulsified asphalt meets and is well over the requirements of JTGF40-2004 product specification of Ministry of Communications and can be suitable for a high-grade asphalt pavement and a related construction technology.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a modified emulsified asphalt and a preparation method thereof. Background technique [0002] In order to improve the quality of the asphalt pavement and prolong the service life of the road, the maintenance of the asphalt pavement becomes particularly important. Emulsified asphalt has the advantages of energy saving, environmental protection and convenient construction. Therefore, emulsified asphalt has become one of the key materials for road maintenance. Compared with ordinary emulsified asphalt, polymer modified emulsified asphalt has the advantages of high and low temperature resistance, aging resistance and good adhesion, and can be widely used in the sticky layer, permeable layer, ultra-thin wear layer of asphalt pavement, etc. [0003] In the prior art, emulsified modified asphalt cannot have the performance of high solid content and low viscosity on the b...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/08C08L91/00C08K3/06
CPCC08L95/00C08L2205/025C08L2205/035C08L53/02C08L9/08C08L91/00C08K3/06
Inventor 雷勇王涛夏强斌何波张金钧费恒志张晓峰于慧明蔡璐李木青
Owner CHINA NAT OFFSHORE OIL CORP
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