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concrete curing
4

concrete curing

concrete curing

(OP)
which one is more effective for concrete, electric curing or steam curing? and why?

i need to know whether i can compare the effectiveness of electric curing compared to steam curing, in terms of its environmental impact (CO2, SOx, NOx emissions).
thanks a lot.

RE: concrete curing

What do you mean by "electric" curing? Steam curing is very effective; however, as with all elevated temperatures in the curing of concrete, you gain early strength, but compromise ultimate strength slightly.

RE: concrete curing

electric curing?

RE: concrete curing

Production plant or site?

In a stationary facility, depending on the energy cost, steam (or really hot water) is cheaper than electrical.

Low pressure steam must be controlled in some manner. Much depends on the size of the concrete elements to be cured.

Higher curing temperatures allow the use of "greener" materials in the concrete mix.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

RE: concrete curing

Ron:

Electric curing has been used for many years in mental institutions.

Just thought you'd like to know.

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

RE: concrete curing

Mike,
My lobotomy made me forget!  Thanks,
Ron

RE: concrete curing

Igor's boss in Bohemia, Romania or Bavaria was an expert on electric curing and even brought a pieced up person back to life.

Electric curing is also used for some products in some precast plants in the area.

Dick

Engineer and international traveler interested in construction techniques, problems and proper design.

RE: concrete curing

2
Electrical and steam curing methods are used primarily in the precast concrete industry.

http://www.precast.org/publications/mc/2006_septoct/quick_cure.htm

Both curing methods are effective. Steam is more likely to be cost efficient because the operating cost for energy will be lower.

If you were using steam curing, you would need to generate the steam on site using a boiler with natural gas as the source of fuel.

If you use electrical energy, you would purchase the electrical energy from the local power company. The typical power plant makes steam in order to generate that electricity.

Natural gas can be used to generate electricity in a variety of ways. The most basic natural gas fired electric generation consists of a steam generation unit, where fossil fuels are burned in a boiler to heat water and produce steam, which then turns a turbine to generate electricity. Natural gas may be used for this process, although these basic steam units are more typical of large coal or nuclear generation facilities. These basic steam generation units have fairly low energy efficiency.

Typically, only 33 to 35 percent of the thermal energy used to generate steam is converted into electrical energy in basic steam generation units.

http://www.naturalgas.org/overview/uses_eletrical.asp

Therefore, in a simple comparison, the environmental impacts of using electrical energy results in roughly 3 times the (CO2, SOx, NOx) emissions of using just natural gas directly fired to make just steam.


 

RE: concrete curing

Is that why Frankie got steamed?

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

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