DE1065313B - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

PATENT DOCUMENT 1065

INTERNAT. KL. C 04 b

REGISTRATION DATE: MARCH 5, 1954

NOTICE
THE REGISTRATION
AND ISSUE OF THE

EDITORIAL: SEPTEMBER 10, 1959 EDITION OF THE

PATENT DOCUMENT: AUGUST 4, 1966 DEVIORS FROM EXPLOITATION

(B 44152 VIb / 80 b)

- In the case of the plasticizing and / or air-entraining type as additives for cement mortar or concrete So far used substances are predominantly either soap-like, with longer paraffinic ones Products with chains, such as alkyl sulfonates, aryl alkyl sulfonates or fatty alcohol sulfonates, all of which are included in their solutions are bundled micellar, or such products as lignin sulfonic acid, humic acid, Protalbic or lysalbic acid, which are generally of a higher molecular nature. All such Substances, including resins and resin soaps, form colloidal solutions.

When these substances are added to cement mortar or concrete, noticeable changes are generally observed Setting delays and mostly also an unsatisfactory strength development, which by no means keeps pace with achievable water savings. All of this also applies to those with more or less Phehol-formaldehyde condensation products with a greatly increased molecular weight, which as such or in sulfonated form have already been proposed as additives for mortar and concrete are, and also proposed higher molecular weight, more than 10 carbon atoms containing non-halogenated network and foaming agents, such as those produced by the oxethylation of fatty acids, fatty acid amides, fatty acid glycerides, Fatty amines, phenols, aromatic bases and the like can be obtained.

In contrast, it has been found that phenol, cresols or naphthols, preferably in alkaline Solution, also preferably in connection with known plasticizing or air pore-forming Admixtures as admixtures in small amounts of about 0.001 to 0.1%, based on cement, for Cement mortar and concrete are excellent usable. Substitution products of the substances mentioned do not fall under the invention.

If you add 0.05% phenol to mortar or concrete, calculated on cement, in dilute caustic soda dissolved, added, one observes a considerable water saving compared to that without the addition amount of water required for the same plasticity; the setting process usually takes place noticeably accelerated, or at least not retarded, the introduction of air is decreased and it becomes substantial increased final strength achieved.

Mixtures of phenols with known plasticizers and air entraining agents, such as. B. Alkylarylsulfonät or resin soap. Such combinations, when applied to mortar or concrete, on the one hand result in the greatest possible water saving, and on the other hand, processes for improvement
the properties of cement mortar
or concrete

Patented for:
Dr. Karl Brandt ₅ Berlin-Wilmersdorf

Dr. Karl Brandt, Berlin-Wilmersdorf,
has been named as the inventor

45

On the other hand, the setting-retarding and strength-reducing side effects of the plastifl · ornamental and air-entraining main components largely or completely eliminated. With air entrainers causes the addition according to the invention also a regulation of the air pore volume in the direction of Keeping constant.

example

As a plasticizing and air-entraining additive for mortar and concrete, one is sufficient alkaline solution in which 6% resin soap and 3% phenol have been dissolved is used. Of the Addition of 0.1 to 0.2% of this solution, calculated on cement, results in a water saving of 10 to 15% an air pore volume between 3 and 4.5% and strength increases of up to 10%. One Corresponding resin soap solution without phenol shows significantly lower water savings with 0.2% addition however, higher air entrainment and ultimately strength reductions of up to 10%. Other usual Additions can be used without restriction.

For the practical implementation of the invention, it is primarily those that are particularly economical to use Products such as raw phenol or raw cresol.

The invention is particularly suitable for the effectiveness of specifically water-saving and to increase air-entraining agents to the maximum.

Claims (1)

PATENT CLAIM: Process for improving the properties of cement mortar or concrete by adding 609 UiIXl Small amounts of phenolic compounds before or during processing, characterized by the use of phenol, cresols or naphthols, preferably in an alkaline solution, also preferably in connection with well-known th plasticizing or air pore-forming additives. Documents considered: German Patent No. 703 338. O 909 627/360 9.59 (S09 643/367 7.66)