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Cement sulfate-resistant in Uzbekistan

Cement sulfate-resistant in Uzbekistan

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Technical characteristics
  • BrandQizilqumsement
  • Country of manufactureUzbekistan
Description

Shirokoizvestny brand of a portlandtsement of SSPTs 400 D0.

Sulfate-resistant cement is made by a joint high milling of portlandtsementny clinker, plaster. Let out the Sulphate-resistant portlandtsement without additives and with mineral additives - the granulirovayena domain and electrothermophosphoric slags (10 - 20%), active additives from sedimentary breeds, except gliyezhy (5 - 10%). Cement brand without additives - 400, with additives - 400, 500. Apply it to hydraulic engineering constructions in the conditions of sulphatic aggression.

The sulfate-resistant portlandtsement is a kind of a usual portlandtsement and differs from the last generally in what finds the increased resistance to sulphatic aggression in the conditions of systematic alternate freezing and thawing or moistening and drying. Receive this cement by a joint grinding of clinker of rated structure and plaster.

The chemical and mineralogical composition of the clinker used in production of a sulfate-resistant portlandtsement has to meet the following requirements:

settlement content of three-calcic silicate — no more than 50%;

settlement content of three-calcic aluminate — no more than 5%;

the size of the aluminous module — not less than 0,7.

Settlement content in C3A+C4AF sum clinker, should not exceed 22%. Need of receiving clinker of rated chemical and mineralogical structure predetermines requirements imposed to raw materials.

It is very expedient to use bergmeal or diatomite or a molding as a part of a clay component. Do not enter active mineral dooavka into a sulfate-resistant portlandtsement, and only under favorable conditions for its service in some cases (under the agreement between the supplier and the consumer) introduction at a grinding of a small amount of such additives is allowed. The last have to meet the requirements of GOST 6269 — 54 on active mineral additives to the knitting substances' or in case of application as an additive of the granulated domain slags — to requirements of GOST 3476 — 60 on slags domain granulated for production of cements. Resilience of a sulfate-resistant portlandtsement to action of sulphatic aggression increases at introduction to its structure of a surface-active additive. Therefore according to GOST 970 — 61 introduction to its structure and sulphitic and alcohol bards or a mylonafta is allowed. In these cases appropriate it the name of the plasticized or hydrophobic sulfate-resistant portlandtsement.

On strength indicators this cement is subdivided into three brands: 400, 500 and 600. Due to the moderate content in clinker of three-calcic silicate and small content of three-calcic aluminate the sulfate-resistant portlandtsement differs from a usual portladtsement in the lowered thermal emission. Properties inherent in a sulfate-resistant portlandtsement cause also possibilities of its practical use. It is the most expedient to apply this cement to concrete and reinforced concrete designs including previously intense, hydraulic engineering constructions which are exposed to sulphatic aggression at the variable level of the horizon of water and also for production of piles, a construction of support of bridges, piers intended for service in the mineralized waters.

Application of a sulfate-resistant portlandtsement for underwater parts of sea and ocean constructions is allowed, however for these purposes more economic is use of a sulfate-resistant puzzolanovy portlandtsement As in a sulfate-resistant portlandtsement the active heatallocating minerals (C3S and S3A) contain in smaller quantity, it in some cases can be applied instead of a portlandtsement with a moderate ekzotermiya in external zones of massive hydraulic engineering constructions.

Other goods: cement, slate, slag stones, plates, brick, electrodes, crushed stone.

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Cement sulfate-resistant in Uzbekistan
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