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Why and how would you extend the curing process of the concrete?
Wiki User
∙ 11y ago
Placing plastic sheeting (known as visquene in construction trades) over drying concrete extends the curing process of concrete. The idea is to slow the evaporation of moisture from the drying concrete. The slower concrete curing process, the stronger the concrete becomes. On construction jobs I have been party to, the curing concrete is usually covered for two or three days.
If the curing concrete's surface were to get dry, there may not be enough water for the chemical reaction which forms concrete, and so the surface would not be as strong. Wetting isn't about "extending" but rather allowing the curing to make a hard surface. The full curing takes as long as a month to reach full strength, but most of the reaction happens in three days.
If you actually want it slower, then cooling would work, as with any chemical reaction. Also disrupting the water-cement reaction would work, which would unfortunately make the concrete weaker. For example, adding sugar or anything that ties up the water would slow the reaction but harm the strength of the result.
Wiki User
∙ 11y ago
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What is concrete pouring process used in Hoover Dam?
they poured the concrete into boxes with cooling tubes running through them. curing concrete produces heat and the vast size of the dam produces insulation so the concrete in the centre would still be curing for another 50 years yet
How many days should we water rcc slab and columns?
That would depend on the kind of concrete. Normally longer is better. The slower the curing process the stronger the concrete.
What does high t temperature do to concrete?
Temperatures below boiling point - commonly about 700C, are used to quicken the curing of mass-produced items such as concrete blocks and pipes. This can shorten the curing from a few days to a few hours. However, in large concrete pours, such as would be found in a mass concrete dam, the heat generated by the self curing process could induce thermal expansion stresses, and this is countered by having cooling pipes installed in the dam body. Temperatures much elevated, could boil away the water of crystallization from the various crystal processes upon which the concrete depends for its strength. Effectively, you would be 'calcining' the crystals once again!
If concrete generates its own heat during curing how long would you need to cover a foundation to keep from freezing?
Keep it covered at least a week.
Can you pour concrete on 0 degrees Fahrenheit?
Because water is a main component of concrete and water freezes at 32 degrees Fahrenheit, it would be very difficult to get a good poor with proper curing at 0 degrees Fahrenheit.
What are the concrete mix additives for fast curing?
You could add lime putty. But the best solution would be to get a cement that sets in the amount of time you need, a 'slow setting cement'.
What were the problems with Biosphere2?
When Biosphere2 was constructed near Tucson, Arizona, many tons of concrete were poured in the construction process. For many months after it sets, concrete absorbs carbon dioxide as part of the curing process. Plants, animals and humans were sealed in the environment before the concrete was completely cured. The organisms, including the humans, were releasing carbon dioxide during respiration which, normally, would have been absorbed by the plants that would then release oxygen into the environment, However, most of the carbon dioxide was being absorbed by the concrete so the plants could not flourish and provide oxygen to the inhabitants. The oxygen levels dropped to a dangerous level and nearly killed the humans living there. Supplemental oxygen had to be provided by the scientists to prevent a disaster.
How many days required for concrete curing?
That depends on the concrete, as well as weather conditions, and the load the concrete would be subjected to. Concrete gains strength over time and the usual benchmarks are 7 days, and 28 days. At 28 days concrete has usually cured to nearly its maximum strength. For a concrete footing in a residential environment say a deck or home the concrete will usually cure for a minimum of three days before the formwork is removed and the rest of the structure is built. For a commercial or civil project the curing is subject to the engineers discretion.
Would you get an award for curing a disease?
It depends on what disease you cure. curing diseases is duty of an honest physician .
Process for installing laminate flooring?
Laying down laminate flooring on concrete is usually a tedious process. Only a profesional would be able to carry out such a operation.
What are the advantage of precast concrete?
Quality control would be high on the list, for concrete may be made with minimum water under factory conditions. Concrete pipes for example are made from aggregate that appears only slightly damp! - But with steam curing, a quality product results. Accurate, repeatable products are another advantage. And factory manufacture produces the quality product at good speed. Freedom from weather and site conditions would be another.
What rocks and minerals are used to make concrete?
The stones in concrete are more correctly known as aggregate. They overlap each other from the top to the bottom of the pour, and this makes the curing and cured concrete much more resistant to cracking. The stones also give concrete a much higher compressive strength.
