Bitumen emulsion

FIELD: road-building materials.

SUBSTANCE: pavement-intended bitumen emulsion contains, wt %: bitumen, 45-49; surfactant-type emulsifier in the form of amines, diamines, polyamines, and quaternary ammonium salts, 0.125-0.25; aqueous hydrochloric acid for neutralization of emulsifier, 1-2; additionally, polyalkylbenzene resin produced as by-product in isopropylbenzene production process, 1-15; and water, the balance.

EFFECT: increased resistance of bitumen component to oxidative ageing processes without losses in other performance characteristics.

2 tbl, 12 ex

 

The invention relates to bituminous emulsions used in creating the pavement.

Known bitumen emulsion for road works, including bitumen, cationic adhesive additive, hydrochloric acid and water [Methodical recommendations on preparation and application in road construction cationic emulsions. M, Soundarya, 1973, p.3-24].

The disadvantages of this emulsion are insufficient stability and adhesion to the mineral filler and the complexity of the regulation of the speed of its collapse when the same content of the emulsifier.

The closest present invention is a bitumen emulsion [patent RU No. 2176652, CL 7 C 08 L 95/00, 2001], including bitumen, emulsifier surfactant-based type of amines, diamines, polyamines and Quaternary ammonium salts, hydrochloric acid as a reagent to neutralize the emulsifier and water. Moreover, it further comprises a waste pyrolysis of hydrocarbons - heavy pyrolysis resin under the following ratios, wt.%:

Bitumen 20-70

The emulsifier is 0.1-5

reagent for neutralizing emulsifier 0.5 to 3

TPS 0,4-8

water the rest

Recipe emulsion allows you to adjust the speed of its collapse when the same content of the emulsifier, improves its stability and adhesion of mineral filler, and also contributes to the economy the AI bitumen.

The disadvantage of emulsion is insufficient resistance to oxidative aging. Change the depth of needle penetration and ductility of bitumen extracted from the emulsion, relative to the values of the relevant parameters of the initial bitumen, used for the preparation of the emulsion, does not meet the requirements of GOST 18659-81 on emulsion bitumen road, according to which these changes should not exceed 15%, while for the prototype values of these parameters are reduced by 16-19%. The above drawback, apparently caused by the presence of SCC (according to the results of analyses by NMR and IR spectroscopy)

unsaturated olefinic structures and unsaturated aliphatic aldehydes. This disadvantage can lead to shortened service life of the pavement.

The task of the invention to provide an emulsion that can improve the stability of the bitumen component to the processes of oxidative aging while maintaining the other advantages, namely the ability to control the speed of its collapse when the same content of the emulsifier, high stability and good adhesion to mineral filler and savings bitumen.

The problem is solved by the development of bitumen emulsion comprising bitumen, emulsifier, reagent for neutralization is emulgator, water and an additional component, characterized in that as an additional component it contains a by-product of the production of cumene - polyalkylbenzene resin with the following ratio of components, wt.%:

Bitumen 45-60

Emulsifier 0,125-0,25

Reagent for neutralizing emulsifier 1-2

Polyalkylbenzene resin 1-15

Water the rest

For the preparation of the emulsion used oil road bitumen grades BND 60/90 and BND 90/130 according to GOST 22245-90.

Physico-chemical characteristics of polyalkylbenzenes resin (ABS) (product of JSC “Kazanorgsintez”, THE 38.10296-83) shown in table 1.

As the emulsifier used surfactant type amines, diamines, polyamines and Quaternary ammonium salts.

As a reagent to neutralize the emulsifier using concentrated hydrochloric acid.

Bitumen emulsion is prepared by known techniques by mixing the components in the following sequence:

In a mixture of water, emulsifier, acid and PUBS heated under stirring up to 70-75°With, being under stirring pre-heated to 120-125°With road bitumen.

Samples of bitumen emulsions were prepared in accordance with the following examples:

Example 1. To a mixture of 77,75 g of water, 0.25 g of emulsifier, 2 g acid and 2 g of ABS heated to 75°C, With constant paramasivan the add 118g pre -

heated in a separate container to 125°With road bitumen BND 60/90 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 59, emulsifier - 0.125, acid - 1, PBS - 1, water - 38,875.

Example 2. To a mixture of 77,75 g of water 0.25 g of emulsifier, 2 g of the acid and 6 g of ABS heated to 75°C, With constant stirring, 114 g of preheated in a separate container to 125°With road bitumen BND 60/90 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 57, emulsifier - 0.125, acid - 1, PBS - 3, water - 38,875.

Example 3. To a mixture of 77,75 g of water 0.25 g of emulsifier, 2 g of the acid and 10 g ABS heated to 75°C, With constant stirring, add 110 g preheated in a separate container to 125°With road bitumen BND 60/90 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 55, emulsifier - 0.125, acid - 1, PBS - 5, water - 38,875.

Example 4. To a mixture of 77,75 g of water, 0.25 g of emulsifier, 2 g of the acid and 20 g of ABS heated to 75°C, With constant stirring, 100 g of preheated in a separate container to 125°With road bitumen BND 60/90 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 50, emulsifier - 0.125, acid - 1, PBS - 10, water - 38,875.

<> Example 5. To a mixture of 77,75 g of water 0.25 g of emulsifier, 2 g of the acid and 30 g of ABS heated to 75°C, With constant stirring, 90 g of preheated in a separate container to 125°With road bitumen BND 60/90 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 45, emulsifier - 0.125, acid - 1, ABS - 15, water - 38,875.

Example 6. To a mixture of 75.5 g of water, 0.5 g of emulsifier, 4 g acid and 2 g of ABS heated to 70°C, With constant stirring, 118 g of preheated in a separate container to 120°With road bitumen BND 90/130 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 59, emulsifier - 0.25, acid - 2, PBS - 1, water - 37,75.

Example 7. To a mixture of 75.5 g of water, 0.5 g of emulsifier, 4 g acid and 6 g of ABS heated to 70°C, With constant stirring, 114 g of preheated in a separate container to 120°With road bitumen BND 90/130 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 57, emulsifier - 0.25, acid - 2, PBS - 3, water - 37,75.

Example 8. To a mixture of 75.5 g of water, 0.5 g of emulsifier, 4 g acid and 10 g ABS heated to 70°C, With constant stirring, add 110 g preheated in a separate container to 120°With road bitumen BND 90/130 and peremeshivayte until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 55, emulsifier - 0.25, acid - 2, PBS - 5, water - 37,75.

Example 9. To a mixture of 75.5 g of water, 0.5 g of emulsifier, 4 g acid and 20 g of ABS heated to 70°C, With constant stirring, 100 g of preheated in a separate container to 120°With road bitumen BND 90/130 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 50, emulsifier - 0.25, acid - 2, PBS - 10, water - 37,75.

Example 10. To a mixture of 75.5 g of water, 0.5 g of emulsifier, 4 g acid and 30 g of ABS heated to 70°C, With constant stirring, 90 g of preheated in a separate container to 120°With road bitumen BND 90/130 according to GOST 22245-90 and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 45, emulsifier - 0.25, acid - 2, ABS - 15, water - 37,75.

For comparison we offer samples of emulsions with the prototype were prepared 2 sample emulsions according to the prior art (examples 11-12).

Example 11. In 49.7 g road bitumen (according to GOST 22245-90)heated to a temperature of 110°With add when mixing 0.3 g of cationic emulsifier. The aqueous phase is prepared as follows: in 48.5 g of water is added with stirring 0.5 g of anhydrous heavy pyrolysis resin (SCC) and 1 g of hydrochloric acid, then heated with stirring to 85° With, then add a mixture of bitumen with an emulsifier having a temperature of 110°and mix until smooth.

The composition of the obtained emulsion of the following (wt.%): bitumen - 49.7, emulsifier - 0.3, acid - 1, TPS - 0.5, water - 48,5.

Example 12. In 49.7 g road bitumen (according to GOST 22245-90)heated to a temperature of 110°With add when mixing 0.3 g of cationic emulsifier and 2 g anhydrous TPS. The aqueous phase is prepared as follows: in 47 g of water was added 1 g of hydrochloric acid, mix thoroughly, heat the solution to a temperature of 85°With, then add heated to 110°With a mixture of bitumen, emulsifier and heavy pyrolysis resin. Mix until smooth.

The composition of the obtained emulsion of the following (% Mac): bitumen - 49.7, emulsifier - 0.3, acid - 1, TPS - 2, water - 47.

Physico-mechanical properties of the emulsions prepared according to examples No. 1 to No. 12 shown in table 2, according to which the proposed emulsion exceeds the prototype in terms of resistance to oxidative aging. The depth of needle penetration and ductility of bitumen extracted from the proposed emulsion is 7-11% of the value of this indicator for the source of bitumen, against 16% to 19% for the prototype. As for the other indicators proposed emulsion is not inferior to the prototype.

100
Table 1

Physico-chemical properties polyalkylbenzenes resin JSC “Kazanorgsintez” (TU 38.10296-83).
IndicatorsValue
Density, kg/m3990
Molecular mass, cu250
Sulfur content, % mass.0,04
Kinematic viscosity, mm2/s14,8
- at 50° 
- at 100°5,6
Pour point, °-12,0
The content of aromatic hydrocarbons, wt. -%66,5
including: 
- dialkylamides12,5
- polyalkylene54,0
High molecular weight residue, % mass.24,5
Fractional composition:/td>  
The beginning of the boil; °170-180
Boils, % mass.: 
up to 300°20,65
up to 370°75,35
up to 440°of 87.0
the remainder above 440°13,0
Table 2 - Performance characteristics of bitumen emulsions
The composition and properties of bitumen emulsionsOffer samples (No. of samples)Samples of the prototype (No. of samples)
 123456789101112
The content of components in the emulsion, % mass.:             
bitumen5957555045595755504549,749,7
emulsifier0,1250,1250,1250,1250,1250,250,250,250,250,250,250,25
PABS13510151351015- -
TPS----------0,53
reagent for neutralizing emulsifier111112222211
water37,87537,87537,87537,87537,87537,7537,7537,7537,7537,7548,547
The decay rate when mixed with quartz sand, g sand /100 g emulsion185175155130550470400200105100185
Changing the depth of penetration of the needle for bitumen separated from the emulsion, compared to the original bitumen %7991011991010101719
The decrease in compliance for bitumen separated from the emulsion, compared to the original bitumen %99,5101010,589,59,510,5111618
Continuation of table 2
The composition and properties of bitumen emulsionsOffer samples (No. of samples)Samples of the prototype (which is no examples)
 123456789101112
Adhesion of mineral materials, % of area989610097969892961009997100
The viscosity at 20°C through the waste hole 3 mm, s222426283133394256502324
The stability during storage of the remaining bitumen on the sieve 0.14 mm %             
after 7 days0,10,10,10,080,090,10,10,10,10,10,10,08
in 30 days0,150,20,180,10,150,20,20,10,180,190,20,1

Bitumen emulsion containing bitumen, surfactant type amines, diamines, polyamines and Quaternary ammonium salt as an emulsifier, hydrochloric acid as a reagent to neutralize the emulsifier, water and an additional component, characterized in that as additional the additional component it contains polyalkylbenzene resin, a byproduct of the production of cumene, at the following content, wt.%:

Bitumen 45-59

Emulsifier 0,125-0,25

Reagent for neutralizing emulsifier 1-2

Polyalkylbenzene resin 1-15

Water the Rest



 

Same patents:

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1 ex, 4 tbl

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FIELD: highway building and repair, in particular surface treatment of pavements.

SUBSTANCE: claimed emulsion contains (mass %) mineral material 83.5-87.5 and cation bitumen emulsion 11.5-14.5. Mineral material additionally contains cement 1.0-2.0; cation bitumen emulsion contains (mass %) bitumen 60/90 59.0-65.0; cation emulsifier 0.7-0.9; surfactant admixture 0.15-0.25; calcium chloride 0.07-0.13; hydrochloric acid 0.35-0.60; oxyethylated phenolic alcohol 0.65-0.80; and balance: water.

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1 ex, 4 tbl

Bitumen emulsion // 2244725

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2 tbl, 12 ex

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1 ex, 3 tbl

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6 cl, 3 ex, 4 tbl, 1 dwg

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4 tbl, 4 ex

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4 tbl, 9 ex

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7 ex, 1 tbl

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3 cl, 2 tbl, 4 ex

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3 cl, 2 tbl, 4 ex

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