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take a few minutes to ensure forms are clean tight and braced
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How many days does cement take to cure completely?
Generally 30 days brings concrete to to specified compression strength. Concrete may take 30 years to cure.AnswerConcrete will harden to about 80% strength in 2-3 days and close to 100% strength in 28 days. Concrete driveways should be towards the latter end prior to driving on them. AnswerAs a former concrete inspector, I would agree with the first answer. AnswerConcrete takes 50 years to completely cure and then takes 50 years to break down
Is cracking at joints acceptable after new pour of concrete?
Cracking at expansion joints is always acceptable and is the reason for the joint itself. There are two kinds of cracks, pretty ones and ugly ones! Ugly ones are random cracks where the concrete relieves itself from drying shrinkage in a random location within the slab of concrete which is normally not appealing to the eye. Expansion joints are placed at predetermined intervals within the slab where random cracks are weakened planes in locations where cracking is predicted prior to fresh concrete placement. All concrete shrinks when it dries, the larger the slab, the greater the overall shrinkage. When the tensile strength of drying shrinkage exceeds the tensile strength of the concrete, cracking will occur. Lets just hopes it cracks in a spot where we planned it instead of a location where didn't. By the way, joints should be cut at least 25% of the depth of the slab.
How is cement stored on a construction site?
Dry cement in bags is stored in a dry place protected from the weather. For large construction sites this is usually a secure storage area. If you are talking about mixed cement (wet) or concrete, then it is not stored on a construction site. It is mixed off-site and carried to the site in large "cement mixer" trucks. The it is placed (or poured) prior to the initial setting time specified by the concrete manufacturer.
If you fail the architectural registration exam how long do you have to wait to take it again?
if you do not pass any one section of the exam, you must wait six months prior to being allowed to retake that section.
What is in brick mortar?
It depends on the age of the mortar. Today's mortar is made from sand, Portland cement and water. In very cold weather a plasticiser is added. Prior to about 1900 mortar was made from sand, lime and horse-hair.
How do you waterproof a slab on grade foundation?
Use polyethylene sheet membrane. Prior to concrete placing, cover the entire area with a layer of PE sheet membrane extending the perimeter of slab and up against wall for the depth of concrete.
Will goldfish be OK in a pond?
It should be OK if you allow the temperature of the water it is in to adjust/equalise prior to placing it in the pond.
How do you keep concrete block walls from collapsing?
Prior to stuccoing the CBS you can install metal mesh or REBAR
How many days concrete has to be cured prior to steel erection What counts days or strength achieved by concrete?
the strength that it has gained is the main thing, but usually 5 to 7 days as a rough guide.
What is a wooden float?
A Wooden float is the flat surfaced tool that is used for smoothing the surface of concrete prior to it setting. A wooden float produces a reasonably non slip surface as it pulls up sand out of the concrete mix to the surface.
If you have completed splinting an aimans arm fracture what should you be aware of before applying a sling and swath?
Make sure there is a distal pulse from the splint prior to (and after) placing in a sling.
What is the advantages and disadvantages of pretensioning method of concrete?
pretensioning is the process of inducing reverse stresses to concrete prior to design loading so as to achieve slender sectins thereby reducing cost. disadvantages of pretensioning are losses due to slip, etc
How long should you wait before you seal concrete?
AnswerTypical concrete takes 28 days (4 weeks) to cure. Prior to the 28 days concrete still has moisture in it that weakens the strength of the concrete. If you seal it prior to 28 days there is a chance you will be sealing in some of that moisture and hence weakening the integrity of the concrete. Another more common problem that occurs when you seal in the moisture is you can see white cloudy bloches which is really the reaction of the moisture and sealer. This prevents a strong bond for the sealer and the sealer can peal up. Ok, all that said, the 28 days really is condition dependant. If you poured your concrete in the middle of dry summer then 14 days should be the minimum amount of time you should wait. After you seal the concrete (depends on conditions and sealer product) you will typically want to give the sealer 1 day prior to walking on it and 48 hours after application before driving on it. Again depends on type of sealer (ie. epoxy...). concretenetwork.com has a lot of good info as well. Good luck.
What is the location of the marker on 8 ball billiard game?
The marker is placed by the player when the object ball is the 8 ball under APA Rules. There is no location prior to the player placing the marker, as it is typically in their pocket.
Why is the slump test done and the frequency at which it is done at site?
To randomly check the quality of concrete, work ability base on mix design. It must be checked prior casting in place
How do you prepare cement floor for vinyl tile?
Ensure concrete is clean, smooth and dry. Concrete should be first cleaned with degreaser to remove any residue. Use a self leveling compound if floor is not level or has some low areas. Fill any cracks or holes prior to using leveler. Allow leveler to dry overnight and seal concrete the following day to prevent moisture from wicking through concrete. Install flooring of choice.
Sod Installation?
form_title=Sod Installation form_header=11243 What would you estimate the size of the area needing sod to be?*= {"Select One,Small (Less than 1,000 sq ft),Medium (1,000 - 3,000 sq ft),Large (3,000 - 10,000 sq ft),Very Large (More than 10,000 sq ft)"} Does the area need to be graded prior to placing the top soil and sod?*= () Yes () No () Don't Know What are the present areas that require removal prior to installing the sod?*= [] Old grass or weeds [] Trees [] Asphalt [] Concrete [] No existing surfaces to be removed
