DE2101333A1 - Means for improving the setting of hydraulic mixtures - Google Patents

Description

gowns to improve the setting of hydraulic mixtures

The invention relates to a means for "improving the setting of hydraulic gears, for example for paving the ground, from a bituminous binder in the form of an emulsion. The j] ri'indunt; also refers to the various applications of this bituminous; 3ind8uiit celo, iriabosoriviGi'G to otabilize or to cover, i ^ ociecken and Ummsnteln, 'as well as to the with this ^ iittel produced : .i <il ± büu utubiiioierton or coated jir products, like .Λι ·: ..:; ( ίίια j: j.välQj ^ port ^ leute, jür ^ örötei ^ e, i'reie places like

X'3te, Ver ^ enra- and. Places to stay and the like.

. j j ^ Ln ulsionafüri / i present bitUuiinöse binder according to the ί · Γί 'ΐuiifi ijt before all ^ i ^ bo uiiü.at to SSEH - £ idlung of hydraulicchen -ix ± fiüiL s, üerexi i-.rjüiriiHn.. α au V ^ riifaxaen ^ a or feeding

109883/1564

Dr REINHOLD SCHMIDT, 7 (Λ) λ OPI'ENAU, Postfadi 25, Allmendplatz 4, phone (07804) 710

BAD ORK3INAL

of calcium ions, but the properties of the binder also allow its use for other materials

It has been found that treatment with a bituminous binder in mixtures in which the hydraulic setting requires the presence or addition of calcium ions, such as, for example, hydraulic mixtures of heavy and light-bodied components, to a certain extent Difficulties arise »Since the hydraulic setting in the presence of« ^; If this is done, the treatment can only be carried out in the cold state and it is therefore necessary to use a bituminous emulsion. With the usual anionic or cationic emulsions, however, the binding process was blocked. This phenomenon can be explained by a reaction of the emulsion with the lime, which in the case of anionic emulsions occurs approximately according to the following diagram (1)

2E ₁ -GOO Ha + Ga (OH) ² > (R ₁ -GOO) ² Ga + 2Na OH

and for cationic emulsions according to scheme (2)

2R ₂ - NH ⁵ Gl + Ga (OH) ^k * 2 (R ₂ - NH ² ) + Gl ² Ga + 2H ² O

takes place, where R ₁ and R _{2 represent} hydrocarbon radicals

To eliminate this och.vieriglceiten, the applicant has in numerous Investigations that eventually lead to a jJmulüionsbinäeinäeinmittel, which ueui treats him feuluiulan. Immediate connection grant b, without

* / · 109883/1564

however, the internal friction of the coarse components, which ensure the dry contacts, change and without setting to block the mixture.

The bituminous binder in the form of an emulsion contains, according to the invention, about 50 to 70 percent by weight of bitumen (based on the total weight of the binder) and 30 to 50 percent by weight of an aqueous solution, which is about 0.5 to 2 percent by weight Percentage (in relation to the total weight of the emulsion) of a non-ionic emulsifier which has sufficient affinity for water, but no noticeable effect
on lime and has the following general formula:

R (GH ₂ - GH ₂ O) _n -H

where R is an alkyl radical with a long, optionally substituted chain, or an aryl group which is substituted by a long chain alkyl group, said radical R being represented by an oxygen atom or by a group of the composition (CH ₂ -GH ₂ -O) _n can be bound, and where η
denotes an integer, the value of which depends on the length of the hydrocarbon chain of the lic; .dical R and is generally greater than 10, for example of the order of 20.

A suitable emulsifier has, for example, the formula

where η has the meaning given.

109883/1564

The emulsion according to the invention can be mixed with water in all proportions be diluted; You can use this basic agent to treat all materials that contain up to 12% of components.

The amount of emulsion to use depends on the desired result, i.e. the type of treatment to be carried out, Stabilization or sheathing, and from the aim pursued, the enlargement of the final performances or only the temporary enlargement of certain properties, whereby the final performances mostly obtained independently.

For example, in the case of a central stabilization treatment, the amount of emulsion can vary ^{from 2 to 6 a} / in the event that a mixture is treated which already contains another binding agent, for example a mixture of solid and liquid components (gravelaitier).

An exemplary embodiment of the invention is given below, where the parts mentioned are weight percentages »

109883/1664

- * 5 -

example

Han is preparing an emulsion containing 50 ° / o bitumen and 50 ^ a ■ aqueous solution containing 1 <$> includes the nonionic emulsifier following i'ormel:

Ui η such! Juiulgator is on the market under the name OP 20 "to verfu _{0 0} ung

In ciiebur "eiae one hat a bituminous binder prepared '.velches you can use in a lieng'e of 3 i", a mixture of heavy at once ^ iuliger jjehandlung in the cold and leichtex "Jiestanateile following Zusamaiensetzun ^ good to abbindefähig :; u * Chen: Grave Horillon Üorv 10/20 moistened to 4 ° f i 80 i »Laitier granulated (20 '- / o water, but calculated on dry weight); 10 to 20 j6.
Lime! 1.5 ^

i / as a mixture stabilized by the binary mean can be processed v / ground in the usual way for treated ocl promotional components.

P at en t to the test i

109883/156 /;

Claims (5)

PATENT LAWYERS Dipl.-Iüg. MARTIN LICHT Dr. REINHOLD SCHMIDT Patent Attorney Dr. R. SCHMIDT, 7603 OPPENAU, Postfach 25 Dipl.-Wirtsdi.-Ing. AXEL HANSMANN Diploma in Phys. SEBASTIAN HERRMANN Oppenau, January 11th. 1971 My reference: 4932 Dr.3cii / H L J TRAVAUZ ilT ERODUITb ROUTIERS öoci £ te a itesponsabilite Limitee Paris (France.) Patent claims 1. Means for improving the setting, in particular for paving the ground, made of a bituminous binder in the form of an emulsion, characterized in that the bituminous binder contains the following components: nitwa 50 to 70 percent by weight bitumen (in relation to the total weight of the binder) and 30 to 50 weight Irozente contains an aqueous solution containing about 0.5 to 2 weight rrozente (with respect to the total weight of the emulsion) of a nonionic emulsifier having a sufficient affinity for water, but no significant V / irkun _o · on Lime has and the following general formula hats H (GH ₂ -GH ₂ O) _n -H,
where R is an alkyl radical with a long, optionally suo- 109883/1564 substituted chain, or an aryl group which is substituted by a long chain alkyl group, wherein said radical R can be bonded through an oxygen atom or duroh a group of the composition (OHg-OH ₂ -O) _n , and where η is a ^ anze number means the value of which depends on the length of the hydrocarbon chain of the radical R and is generally greater than 10. 2. Binder according to claim 1, characterized in that the emulsifier has the formula OgH ₁₇ -O ₆ H ₄ -O- (OH ₂ -OH ₂ -O) _n -H, in which η has the meaning given. Binder according to claim 2, characterized in that η = .20. 4. Hydraulic mixture, characterized by an added in the cold for setting (stabilizing or sheathing) Proportion of a binder according to one of Claims 1 to 3 in an amount between 2 and 6 percent by weight of the total mixture. 5. Hydraulic mixture, its setting (stabilization or coating) by adding a binding agent once according to one of claims 1 to 3 is achieved. 109883/1564 ORIGINAL INSPECTED