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INVENTION
Russian Federation Patent RU2289551

Cementing

Name of the inventor: GATAULLIN Ruslan Faritovich (RU); Khabibullina Naila Ravilevna (RU); Ravil Rakhimov Zufarovich (RU); Rakhimov Marat Mullahmedovich
The name of the patentee: Federal State Educational Institution of Higher Professional Education "Kazan State University of Architecture and Construction" (FSEIHPE KGASU)
Address for correspondence: 420043, Kazan, st. Green, 1, KGASU, FEC
Starting date of the patent: 2005.08.09

The invention relates to compositions and shlakoshchelochnyh binders may be used in the building materials industry for making mortars and concretes for various purposes. The technical result - increasing compressive strength and reducing costs shlakoshchelochnyh knitting. Astringent, including granulated blast furnace slag, soda ash technical and siliceous additive contains silica as an additive fused silica fume in the following ratio, wt.%: Granulated blast furnace slag - 92,3-95,2, fused silica fume - 1,3-4 6, soda ash technical in terms of dry matter - 3.1-3.5.

DESCRIPTION OF THE INVENTION

The invention relates to shlakoshchelochnyh astringent and may be used in the building materials industry for making mortars and concretes for various purposes.

Known binder containing granulated blast furnace slag and an alkaline component - soda ash (. Alkaline schelochnoschelochnozemelnye and hydraulic binders and concrete / Ed Glukhovski VD - Kiev Vishcha .: School -., 1979. - 281 p.).

The disadvantage of this type of binder is a low compressive strength.

The closest to the invention is shlakoshchelochnyh binder containing silica as the additive dust production of ferrosilicon with a specific surface of 500-550 m ² / kg. As the alkaline component binder comprising a mixture of soda ash and caustic soda (AS 1615161 C 04 B 7/153. Korolev VA, Kuznetsov AF Petrun'ko VK Vlasenko VG Shestakov VI shlakoshchelochnyh knitting. Publ. 23.12.90, Bul. №47).

The disadvantage of this binder is a siliceous additive consumption increased (15-25%) due to its low specific surface. A further disadvantage is the use of a binder consisting of an alkali component of sodium hydroxide, which increases the cost of the binder.

The invention aims at improving the compressive strength of the binder.

The result achieved by the binder containing granulated blast furnace slag, soda ash technical and siliceous additive, according to the present invention contains silica as an additive - fused silica fume with a surface area of 15,000-25,000 m ² / kg, in the following ratio, wt.%:

As a component of the aluminosilicate shlakoshchelochnyh knitting can be used granulated blast furnace slag, corresponding to GOST 3476-74 "blast-furnace slag and elektrotermofosfornye granulated for manufacture of cement". For the production of samples using granulated blast furnace slag Orsk-Khalilov Metallurgical Combine. The chemical composition of slag is shown in Table. 1.

For mixing shlakoshchelochnyh binders used soda ash technical solution corresponding to GOST 5100-85, production Sterlitamak JSC "Soda" density of 1150 kg / m.

Silica fume condensed (TU 5743-048-02495332-96) with a surface area of ​​15,000-25,000 m / kg - production Chelyabinsk electrometallurgy plant.

Samples for testing were prepared as follows. The pre-dried to a moisture content of not more than 1% of the granulated blast furnace slag milled to a specific surface area of 280-320m ² / kg. The ground slag is mixed thoroughly with the addition of silica fume and shuts with an aqueous solution of soda ash. The ratio of the components take the following, wt.%:

Samples were prepared from normal density test in accordance with the requirements of GOST 310.3-76 ^*. Durability shlakoshchelochnyh knitting samples is determined after the heat and humidity treatment according to mode 3 + 6 + 3 hours at a temperature of isothermal warm-up of 95 ± 5 ° C. tests the proposed binding results are shown in Table 2.

From the above data that the introduction of silica fume, fused in an amount up to 4.6% increases the strength of binder shlakoshchelochnyh to 110.0 MPa. When introducing additives in amounts exceeding 4.6%, the binder strength decreases.

Thus, the addition of microsilica improves strength shlakoshchelochnyh binder. In addition, the absence of a part of the alkaline component of expensive caustic soda will reduce the cost of the resulting binder.

CLAIM

The binder comprising blast furnace slag, calcined soda technical and siliceous additive, characterized in that it contains as condensed silica fume additives in the following ratio, wt.%:

print version
Publication date 17.01.2007gg

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