RU2194062C2 - Inverse-type bitumen emulsion - Google Patents

Abstract

FIELD: manufacture of building and road- building materials. SUBSTANCE: objective of invention is to raise index of strength of asphalt concrete prepared on the basis of emulsion on compaction in dry, water saturated, and protractedly water saturated state, and to enhance adhesiveness with mineral filler. For that, water-in-oil emulsion is developed containing bitumen, 37.0-98.0%, and water, 1.0-24.0%, emulsifier, and a reagent extending emulsion efficiency range. The latter, which also functions as emulsifier, is heavy pyrolysis tar, 1.0-39.0%. EFFECT: improved strength of pavement. 3 tbl, 7 ex

Description

 The invention relates to inverse emulsions for the device of road, roofing and waterproofing coatings.

 Known reverse-type bitumen emulsion for asphalt concrete containing bitumen, black sulphate liquor, naval fuel oil or oil, and emulsifier is liquid glass (ed. Certificate of the USSR 1217867, class C 08 L 95/00).

 The closest invention is an inverse emulsion containing road oil bitumen, heating or naval fuel oil, and the emulsifier is an aqueous alkaline-salt solution (ed. Certificate of the USSR 430131, class C 06 H 13/00, C 04 B 13/30).

 The disadvantage of these emulsions is the relatively low compressive strength of asphalt concrete on the basis of this emulsion in a dry, water-saturated, long-water saturated state, and low adhesion to a mineral filler.

 The objective of the invention is to increase the compressive strength of asphalt based on the proposed emulsion in a dry, water-saturated, long-water saturated state, increase adhesion to a mineral filler.

The problem is solved by the development of the inverse emulsion, including bitumen, water, an emulsifier and an additive that extends the range of the emulsion. Moreover, as an additive and emulsifier, the emulsion contains a waste of the pyrolysis of hydrocarbons - heavy pyrolysis resin (TPS), with the following ratios of components, wt.%:
Bitumen - 37-98
Heavy Pyrolysis Resin - 1-39
Water - 1-24
To prepare the emulsion, oil road bitumen is used in accordance with GOST 22245-90, building bitumen in accordance with GOST 6617-76, roofing bitumen in accordance with GOST 9548-74, insulating bitumen in accordance with GOST 9812-74.

 Heavy pyrolysis resin is used as if it was flooded (in some pyrolysis plants it is produced in this form, for example, at OJSC "Orgsintez", Kazan - the water content ranges from 5-65, wt.%), I.e. without preliminary dehydration, and in anhydrous form (for example, the product of JSC Nezhnekamskneftekhim - TU-38.1021256-89). Physico-chemical parameters of dehydrated TPN are given in table 1.

The emulsion is prepared by sequential mixing of TPN with water and mixing of bitumen preheated to 70-100 ^{° C.} with flooded TPN.

Example 1. In 40 g of flooded TPN (water content 25%), we dose 60 g of road bitumen (according to GOST 22245-90), with a temperature of 70 ^o C and mix on a mechanical stirrer at 500-1000 rpm

 The composition of the emulsion is as follows, wt.%: Bitumen-60, TPS-30, water-10.

Example 2. In 40 g of flooded TPN (water content 37.5%), we dose 60 g of road bitumen (according to GOST 22245-90), with a temperature of 70 ^o C and mix on a mechanical stirrer at 500-1000 rpm

 The composition of the emulsion is as follows, wt.%: Bitumen-60, TPS-25, water-15.

Example 3. In 40 g of flooded TPN (water content 50%), we dose 60 g of road bitumen (according to GOST 22245-90), with a temperature of 70 ^o C and mix on a mechanical stirrer at 500-1000 rpm

 The composition of the emulsion is as follows, wt.%: Bitumen-60, TPS-20, water-20.

Example 4. In 39 g of anhydrous TPN, add 22 g of water and mix until smooth. In this mixture we dose 39 g of roofing bitumen (according to GOST 9548-74) with a temperature of 90 ^o C and mix on a mechanical stirrer at 500-1000 rpm.

 The composition of the emulsion is as follows, wt.%: Bitumen-39, TGS-39, water-22.

Example 5. In 39 g of anhydrous TGS, add 24 g of water and mix until smooth. In this mixture we dose 37 g of roofing bitumen (according to GOST 9548-74) with a temperature of 90 ^o C and mix on a mechanical stirrer at 500-1000 rpm.

 The composition of the emulsion is as follows, wt.%; bitumen-37, TGS-39, water-24.

Example 6. In 15 g of anhydrous TPN, add 15 g of water and mix until smooth. In this mixture we dose 70 g of building bitumen (according to GOST 6617-76) with a temperature of 90 ^o C and mix on a mechanical stirrer at 500-1000 rpm.

 The composition of the emulsion is as follows, wt.%: Bitumen-70, TPS-15, water-15.

Example 7. In 1 g of anhydrous TPS, add 1 g of water and mix until smooth. Dose 98 g of road bitumen with a temperature of 70 ^o C into this mixture and mix on a mechanical stirrer at 500-1000 rpm.

 The composition of the emulsion is as follows, wt.%: Bitumen-98, TGS-1, water-1. Qualitative characteristics of the proposed emulsions are given in table.2.

 Based on the developed emulsions, cold-type asphalt mixtures were prepared in accordance with GOST 9128-97. Qualitative characteristics of the obtained asphalt concrete are given in table.3.

 As follows from the tables, asphalt based on the proposed bitumen emulsion in terms of compressive strength exceeds the prototype in a dry, water-saturated, long-water saturated state. At the same time, bitumen is saved due to the use of waste pyrolysis of hydrocarbons - TPN.

Claims (1)

The reverse type emulsion, including bitumen, water, an emulsifier and an additive that extends the range of the emulsion, characterized in that as an additive and emulsifier it contains a waste of pyrolysis of hydrocarbons - heavy pyrolysis resin in the following ratios of components, wt. %:
Bitumen - 37-98
Heavy Pyrolysis Resin - 1-39
Water - 1-24

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