Duplast CI is a calcium nitrite-based admixture designed to inhibit the corrosion of steelin reinforced concrete. Duplast CI contains a minimum of 30% calcium nitrite by mass and meets the requirements of ASTM C 1582, Corrosion Inhibiting Admixture and ASTM C494, Type C, Accelerating Admixture.
Areas of Application
How to Use
The recommended dosage rate will vary between 10-30 L /? ? of concrete, depending on the severity of the corrosion environment. In absence of a specified dosage rate, please contact your local Dubond representative. Adjust water content accordingly. Duplast CI may accelerate the setting time. In order to prevent slump loss or finishing characteristics, a set retarding admixture, like Duplast , may be required, especially in warm weather application. The full accelerating effect of Duplast CI may be used for cold weather concreting.
Measure the required quantity manually or by automated dispenser. Add Duplast CI directly into the freshly mixed concrete at the end of the batching cycle. When used in combination with other admixtures, care must be taken to dispense each admixture separately into the mix. Mix water adjustment is necessary to account for the water in Duplast CI and thus, maintain the required water/cementitious ratio. The batch water must be adjusted by reducing 0.839 kg of water per Liter of Duplast CI.
Duplast CI can be used with Portland cements compliant with ASTM, AASHTO or CRD specifications. It can be used in combination with other Dubond admixtures water reducers, super plasticizers, set retarders and air entrainment agents. Admixtures have to be added separately to the concrete mix in order to deliver the results required. Duplast CI may slightly reduce the entrained air content and a higher dosage of the air entrainment agent may be required.
Storage and Shelf Life
Duplast CI should be stored above 5°C. If frozen, thaw out and agitate thoroughly to return to normal state before use. Shelf life when stored in dry warehouse conditions between 10°C - 27°C is two years minimum.
|Specific Gravity||Approx. 1.3|
|Packaging Details||Duplast CI is supplied in 20kg, 100 & 200kg drums (in bulk on request.)|