0
Add your answer:
Earn +20 pts
How long must concrete dry before it rains on it?
First of all, concrete does not "dry" to become hard. It cures, which is a chemical interaction between its water and its portland cement. Usually, a couple of hours is plenty of time for concrete to 'set' enough to not be damaged by rain. The best and strongest concrete never dries out for the first 28 days from pouring it.
How dry must concrete be before laying wood flooring?
it has to be tacky!!!!!!!
What must be the slump value for different grade of concrete?
what is the slump value for M20 concrete
What is setting of Portland cement?
In normal usage, allowing the concrete to "set" is the same same as allowing the concrete to "cure". This process starts soon after you mix the cement and aggregate with water, and is a result of the water in the mix chemically binding with cement components. As the concrete sets or cures, the mixture gets harder. Depending on the proportions of the materials in the concrete, after a few hours the concrete will be hard enough to support the weight of the workers as they perform finishing operations (trowelling). After a couple of days, the concrete will typically be hard enough to remove formwork, as long as no loads are imparted to the concrete in doing so. Concrete in the US is typically specified as the compressive strength reached after 28 days. The term "initial set" is used informally to represent the time, after about 4 or 5 hours, where the concrete materials are beginning to bond chemically, and at which point the concrete must be undisturbed or irreparable damage to the structure will occur. All consolidation, compaction and initial floating (levelling) needs to be complete well before the concrete begins its initial set.
What materials go into building a bridge?
Bridges are very complex structures that must be carefully engineered using long-lasting and strong materials. Some of the materials that are used for bridge building includes stones, cement, steel, wood, and composites.
How long must concrete dry before it rains on it?
First of all, concrete does not "dry" to become hard. It cures, which is a chemical interaction between its water and its portland cement. Usually, a couple of hours is plenty of time for concrete to 'set' enough to not be damaged by rain. The best and strongest concrete never dries out for the first 28 days from pouring it.
How dry must concrete be before laying wood flooring?
it has to be tacky!!!!!!!
How long must a Canadian be in Mexico before you can be married?
How long must you be in Mexico before you can be married?:
What is a pre cast concrete?
Precast concrete is a construction element made of that material and finished before its installation in the building frame. The mix of concrete must be cast or scaffolded until it gets enough strengh to handle and support own weight.
How do i do the preparation on new comcrete before tiling it?
The concrete preparation must be seen to carefully before laying tile. The initial surface must be very clean and the cement laid out as smoothly as possible prior to tiling.
How long must you be a cosmetologists before you can retire?
93
How long should a concrete garage floor cure before applying epoxy coating?
If you're dealing with a new slab, you must wait a minimum of 28 days, preferably two months, for the floor to cure and dry thoroughly before applying a garage floor coating.
What must be the slump value for different grade of concrete?
what is the slump value for M20 concrete
How to write expository writing?
You must do it in this order: Concrete Detail, Concrete Detail, Commentary.
How long must passed team wait before remain behind before demanding the trail?
No
How long must an egg be in vinegar before the shell is dissolved?
it takes about ten days before it dissloves
Can green drywall be cemented to concrete?
No, it must be screwed. - But there are many varieties of excellent concrete board now. -
