Retarder


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Related to Retarder: surface retarder, concrete retarder

retarder

[ri ′tärd·ər]
(materials)
A material that inhibits the action of another substance, such as flameproofing agents or substances added to cement to retard setting time. Also known as retardant.
(mechanical engineering)
A braking device used to control the speed of railroad cars moving along the classification tracks in a hump yard.
A strip inserted in a tube of a fire-tube boiler to increase agitation of the hot gases flowing therein.

Retarder

In concrete work, an additive that slows down the setting time, allowing for more time to place the concrete.

retarder

1. In paint, varnish, or lacquer, a high-boiling solvent used to lower evaporation rate of the volatile ingredients.
2. An admixture which delays the setting of cement paste or the setting of mixtures such as mortar or concrete containing cement.
3. An additive, mixed with plaster to control the rate of hardening.
References in periodicals archive ?
The polyethylene vapor barrier is considered a Class I vapor retarder.
The baker's retarder may give him extra sleep, but it definitely does NOT improve the bread for his customers.
Varying the concentrations of initiator, accelerator, and retarder during the injection, one could obtain spatially homogeneous gelation and cure cycle time reduction (8).
Especially designed to meet the demands of bakers and confectioners with regards to organization and comfort, the new CFV 500 fermentation retarder from the French company ACTIV INDUSTRIES makes it possible to delay the rising of Viennese pastries and dough by up to 48 hours.
The process resembles silk-screen printing but with the printing ink replaced by a retarder to change the chemistry of the concrete according to the design.
has developed a new engine retarder that uses silicon nitride ceramic surfaces to resist wear and increase durability.
Attics should have one square foot of vent opening for every 150 square feet of attic floor space, assuming a ceiling vapor retarder is used.
com/research/9kwr5g/research_on) has announced the addition of the "Research on Vehicle Retarder Industry in China, 2012-2016" report to their offering.
Il est a rappeler a ce propos que les membres de la commission des finances a l'ARP ont decide de retarder la promulgation de nouveau code de l'investissement a cause de la delocalisation des mesures fiscales, lesquelles seront regroupees dans un nouveau code general des impots.
L'opposition et une frange de la majorite - dont sept partis (G7) ont fait dissidence mi-septembre - accusent son clan de comploter pour le maintenir en poste, quitte a retarder le scrutin.
The upgraded Minetruck MT42 is also designed to accommodate an optional electromagnetic retarder braking system.
It meets the thermal resistance requirements in those climate zones and meets the vapor retarder requirements in those climate zones.