Articles liés à Effect of NaNO2 and K2CO3 on Cold Weather Concrete

Effect of NaNO2 and K2CO3 on Cold Weather Concrete - Couverture souple

Reddy, Panga Narasimha; Naqash, Javed Ahmed; Narender Reddy, Avuthu

 
9786139454822: Effect of NaNO2 and K2CO3 on Cold Weather Concrete
Couverture souple
ISBN 10 : 6139454824 ISBN 13 : 9786139454822
Editeur : LAP LAMBERT Academic Publishing, 2019

Synopsis

Most of the cold weather countries spend annually plenty of money in order to facilitate concrete placing in the cold weather and to extend the construction season. During cold weather, preparations are made to protect the concrete; enclosures, windbreaks, portable heaters, insulated forms, and blankets are used to maintain the concrete temperature. As an alternative, antifreeze additives can be used in cold weather. These chemical additives suppress the freezing point of water under 0 °C degrees and accelerate the hydration of cement. The effects of antifreeze admixtures are often specific to certain cement brands and fine aggregates. It is important therefore to determine through laboratory mix trials both the operating range and the particular dosage of the admixture required for the intended application. The most common antifreeze admixtures are sodium nitrite (NaNO2) and potassium carbonate (K2CO3). These antifreezes do not cause corrosion of steel and let concrete freeze at a temperature from −10°C (NaNO2) to −15°C (K2CO3).

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

Most of the cold weather countries spend annually plenty of money in order to facilitate concrete placing in the cold weather and to extend the construction season. During cold weather, preparations are made to protect the concrete; enclosures, windbreaks, portable heaters, insulated forms, and blankets are used to maintain the concrete temperature. As an alternative, antifreeze additives can be used in cold weather. These chemical additives suppress the freezing point of water under 0 °C degrees and accelerate the hydration of cement. The effects of antifreeze admixtures are often specific to certain cement brands and fine aggregates. It is important therefore to determine through laboratory mix trials both the operating range and the particular dosage of the admixture required for the intended application. The most common antifreeze admixtures are sodium nitrite (NaNO2) and potassium carbonate (K2CO3). These antifreezes do not cause corrosion of steel and let concrete freeze at a temperature from −10°C (NaNO2) to −15°C (K2CO3).

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2019
Langue
anglais
ISBN 10 
6139454824
ISBN 13 
9786139454822
Reliure
Broché
Nombre de pages
64
Coordonnées du fabricant
Buchpark GmbH
https://www.buchpark.de

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