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A process by which concrete is kept moist for its first week or month to provide enough water for the cement to harden. Also known as mature.

Related Terms


A process in a scrubber whereby water vapor moving toward the cold water surface carries particulates with it.


The amount of energy required to raise the temperature of 1 gram of water by 1 degree C. The kilocalorie (kcal) is a typical unit of measure in the process industry, 1 kcal = 1000 calories.


The opposite to anneal. When hardened tool steels are heated and cooled slowly they become soft. The tempering process is one of heating the metal to cherry red then plunging it into water to cool quickly.


A process of separating solids from water by developing a froth.


Water added to a process to make up for losses due to leaks, blow-downs, etc.


The process by which water rises from a lower to a higher depth, usually as a result of divergence and offshore currents. Upwelling is most prominent where persistent wind blows parallel to a coastline so that the resultant wind-driven current sets away from the coast. Over the open ocean, upwelling occurs whenever the wind circulation is cyclonic, but is appreciable only in areas where that circulation is relatively permanent. It is also observable when the southern trade winds cross the equator.


The process of releasing a portion of the water continuously or intermittently from a boiler to remove impurities in order to maintain predetermined concentrations.


The process where water evaporates from oceans, water vapour falls on the mountains as rain and runs back to the sea in rivers.


  1. The process of enriching a gas by adding volatile carbon compounds, such as hydrocarbons, to it, as in the manufacture of carbureted water gas. 2. The process of mixing fuel with air in a carburetor.


A process in which chlorine gas or other chlorine compounds are added to the water for the purpose of disinfecting.

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