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Why should large concrete slabs be laid with expansion joints so that they are not touching?
Large concrete slabs should be laid with expansion joints to accommodate the natural expansion and contraction of the material due to temperature fluctuations. Without these joints, the slabs can experience cracking, warping, or buckling as they shift. Expansion joints allow for movement while maintaining structural integrity, ensuring the longevity and functionality of the concrete surface. This practice minimizes maintenance costs and enhances safety by preventing surface failure.
Can concrete shrink after it is cured?
Once the moisture is out of the concrete and it is cured it should not shrink - it is however in a state of stress so make sure control joints are added to any large concrete areas that are poured and placed.
Will placing a magnet on concrete damage it?
I don't have an answer but we have several large magnets in the shop I work in. It would appear that when we lower the cranes down and place the magnets directly on the concrete floor it tends to weaken them. I have always heard that placing a car battery on concrete would weaken the battery . Does a magnet act in the same fashion?
Why do concrete roads have gaps between large pieces of concrete?
As the weather varies the concrete expands and contracts. If there were no gaps the concrete would buckle and crack.
When concrete hardens it gives off thermal energy. The concrete temperature should?
When concrete hardens, it undergoes an exothermic reaction, generating thermal energy. This means that the temperature of the concrete should rise as it cures. It's essential to monitor this temperature to prevent issues like cracking or thermal shock, especially in large pours. Ideally, the temperature should remain within a range that ensures proper curing while avoiding excessive heat buildup.
Why should large concrete slabs be laid with expansion joints so that they are not touching?
Large concrete slabs should be laid with expansion joints to accommodate the natural expansion and contraction of the material due to temperature fluctuations. Without these joints, the slabs can experience cracking, warping, or buckling as they shift. Expansion joints allow for movement while maintaining structural integrity, ensuring the longevity and functionality of the concrete surface. This practice minimizes maintenance costs and enhances safety by preventing surface failure.
Why do roads have the gaps between the large pieces of concrete?
They are expansion gaps that allow for the expansion and contraction of the concrete.
Can concrete shrink after it is cured?
Once the moisture is out of the concrete and it is cured it should not shrink - it is however in a state of stress so make sure control joints are added to any large concrete areas that are poured and placed.
Will placing a magnet on concrete damage it?
I don't have an answer but we have several large magnets in the shop I work in. It would appear that when we lower the cranes down and place the magnets directly on the concrete floor it tends to weaken them. I have always heard that placing a car battery on concrete would weaken the battery . Does a magnet act in the same fashion?
What should I be watching for my 5 year old hit his head on concrete has a large goose egg.?
Take him to the hospital!! DUUUH
Why do concrete roads have gaps between large pieces of concrete?
As the weather varies the concrete expands and contracts. If there were no gaps the concrete would buckle and crack.
What is the best method for repairing a concrete large crack using a concrete large crack filler?
The best method for repairing a large concrete crack using a concrete filler is to clean the crack thoroughly, apply the filler according to the manufacturer's instructions, and allow it to cure completely before sealing the surface.
How might the expansion of water when it freezes explain the cracking of concrete and pothole formation?
Because as a liquid, the water will run into small cracks on concrete or a road surface. When this water freezes it will expand and exert large forces on the sides of the crack, forcing it apart. This freezing and unfreezing cycle may continue several times, causing weaknesses in roads and concrete to break apart over time.
Why underestimate the resistance of concrete to such a large extent when you design concrete columns?
The designers calculate the potential effects of cracking on the concrete columns.
What is the best method for repairing a large concrete crack using a large concrete crack filler?
The best method for repairing a large concrete crack using a large concrete crack filler is to first clean the crack thoroughly, then apply the filler according to the manufacturer's instructions. Make sure to fill the crack completely and allow it to dry properly before using the repaired area.
When concrete hardens it gives off thermal energy. The concrete temperature should?
When concrete hardens, it undergoes an exothermic reaction, generating thermal energy. This means that the temperature of the concrete should rise as it cures. It's essential to monitor this temperature to prevent issues like cracking or thermal shock, especially in large pours. Ideally, the temperature should remain within a range that ensures proper curing while avoiding excessive heat buildup.
What is it about cities that make them micro-climates?
Large areas of asphalt and concrete make cities microclimates.
