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What is the effect of hydration on strength of a concrete?
Excess water (over hydration) causes weak concrete. The water in concrete is there to start a chemical process which results in the hardening process. The excess water is not used in the chemical process and results in a weakened concrete.
Advantage of using ggbs in concrete?
because is needs the Ca-OH that is produced from the cement reaction with water to start the hardening but if you added Ca-OH to water it may be used a cement but its very expensive with no much difference in strength
Can you install a real wood floor on top of a concrete floor?
You can. You start by applying moisture barrier to the concrete--flooring stores have it--then gluing the hardwood to the concrete.
What are some possible errors with doing concrete?
Possible errors that can occur with concrete jobs include:Failure to predict weather; doing it when too cold or raining.Failure to use the correct tools.Failure to plan the work and materials.Failure to correctly measure Length x Width x Depth to mix or order the correct amount for concrete.Failure to properly measure the bed, and make earth bed level.Failure to frame and keep the bed's sides perfectly aligned (use marked string to snap a line).Failure to prepare the bed properly, including wire mesh bed, side framing.Failure to mix the correct amounts of concrete, sand, water, and pebbles if desired.Failure to use the correct amount of water, or letting the mix sit not long enough or too long.Failure to properly stir the concrete mix, including avoiding introducing air bubbles.Failure to work concrete mix into all corners and tap it down into the mesh flooring.Failure to level the concrete mix once it is laid.Failure to add texture to top surface to add traction (for slippery weather).Failure to keep kids and pets away---nothing like a foot-paw print to mess up a sidewalk.Failure to cover if it starts to rain.Failure to let the concrete set and dry completely before walking on it.Failure to unlock an alternate door before you start--now you can't get into the house.
How can you test the dielectric strength of oil of transformer?
dielectric strength is tested by transformer dielectric strength oil testing machine. at first, oil which is to be tested is pour near the two electrode. both the electrode should be dipped in oil . then adjust the distance between the electrode .now start the machine.when a sound came from machine then note down the dielectric strength of the oil.
How have technological developments affected the concrete industry?
Since the start of the 1980s, concrete formulations changed to create an entirely new generation of high-strength products
What is the effect of hydration on strength of a concrete?
Excess water (over hydration) causes weak concrete. The water in concrete is there to start a chemical process which results in the hardening process. The excess water is not used in the chemical process and results in a weakened concrete.
How long strength of concrete can rise and when will start to reduce?
The strength of concrete will continue to rise logarithmically forever. The rated strength is normally the 28-day strength, because at this point it will be at about 95% of its eventual strength, but it will continue to rise.Structural concrete is normally reinforced with steel. The concrete provides the compressive strength while the steel provides the tensile strength. It is a composite material, with the steel and concrete working together, but the steel can start to deteriorate compromising the strength of the composite structure - perhaps this is what you meant? When the steel corrodes the entire structure is weakened, since it relies on the tensile strength from the steel.As for when the will corrode, that is completely dependant on how it was constructed. The concrete cover over the reinforcing steel, the structural strength of the concrete, how the concrete was finished and cured, what elements the concrete is exposed to, the orientation of the concrete, the climate where the structure is built, whether there are any protective coatings on the concrete or not, the condition of the steel at the time of construction, whether or not the steel has any protective coatings or not, and many other factors all relate to the condition of the structure. If well designed, well build, and well maintained, a reinforced concrete structure can last 50 years or more with little to no signs of deterioration; however, with poor design, construction, workmanship, and maintenance, the structural integrity can me compromised in only months.If you're thinking about a future construction, make sure that it is well designed and built, and if you're talking about an existing structure and you have concerns, get it checked by a structural engineer.
What is reinforced concrete used for?
Actually concrete is not very good in tension therefore we have to introduce reinforcement which takes care of the tensile stresses. If we don't provide reinforcement, concrete will start showing cracks wherever tensile stresses overcome the concrete tensile strength.
Why is the 28-days compressive strength of concrete generally specified?
It is attributed to two reasons: 1. Strength of concrete grows faster in initial days and this process of gaining strength slow down with time. This can be said as stabilization in value of gained strength of concrete. After approximately 20 or some more days, strength value get stabilize and does not change too much with time. Therefore, compressive strength is taken after approximatley 3 weeks time. 2. These tests have to performed practically and date record is needed to be maintained. Therefore, if test duration is a multiple of 7 (7 weekdays) then it is more easy to remind. It is the reason we have 28=7x4 days to note down compressive strength of concrete. for ex: if we start test on monday then we know that after 4 weeks on same time on monday we can finish the compressive strength test.
Advantage of using ggbs in concrete?
because is needs the Ca-OH that is produced from the cement reaction with water to start the hardening but if you added Ca-OH to water it may be used a cement but its very expensive with no much difference in strength
How hot can concrete get?
Concrete can reach temperatures of up to 572 degrees Fahrenheit (300 degrees Celsius) before it begins to lose its structural integrity and strength. After this point, it may start to crack, spall, or experience other detrimental effects.
What are concrete nouns that start with x?
Concrete nouns that start with X are:xylophonex-ray machinex-ray fishXerox copy
How do I begin to start building strength?
In order to start building strength, you will first have to modify your diet, then you will have to acquire weights (start small) and do daily routines with lifting.
How many hours to start concrete curing after casting of concrete?
It starts curing the second they put water in it.
Can you install a real wood floor on top of a concrete floor?
You can. You start by applying moisture barrier to the concrete--flooring stores have it--then gluing the hardwood to the concrete.
Mixed drinks that start with N?
Negroni
