concrete29

Do i have to remove old paint before painting concrete?

Do i have to remove old paint before painting concrete? Doing the prep work before you repaint a concrete floor avoids a peeling paint job later. Concrete paint can be purchased in either latex or oil-based epoxy enamel. … Remove all flaking, peeling paint using a scraper and wire brush. Smooth and sand rough edges using 100-grit sandpaper.

How do you paint over painted concrete? Use patching compound to fill any holes, scratches, or gouges in the concrete surface. Clean the concrete thoroughly with trisodium phosphate (TSP) and warm water, then let dry. Apply paving paint or porch-and-floor enamel, first to the perimeter and then the middle. Let dry.

What kind of paint do you use on already painted concrete? Epoxy-based paints provide high durability and stain resistance, making them ideal for garage or patio floors. Masonry paints are designed for brick and other masonry applications, but also provide effective coatings for concrete.

Can you bury concrete footings? This footing method involves pouring a concrete pad at least 12” thick at the base of your hole. Next, set a pressure treated wood support post rated for “ground contact” on top of the pad and backfill the soil into the hole. This is the same type of wood that is used for retaining walls. …

Do i have to remove old paint before painting concrete? – Related Questions

How thick to pour concrete for garage?

For most domestic garages, a six-inch slab of concrete will be sufficient. It is only when a space will see constant traffic from much heavier vehicles that a concrete slab of more than six inches would be needed.

How to clean painted concrete walls?

For indoor walls and other painted surfaces, use a paint scraper and wire brush to remove old paint and dirt then scrub with soapy water or tri-sodium phosphate (TSP). For concrete floors, especially in the garage, sweep and vacuum, and clean with TSP to remove any oil or grease.

When is it safe to remove concrete forms?

For Concrete Forms, Concrete walls and concrete columns can be removed after about 24 to 48 hours. 2. Slabs, with their support left under them, can be normally removed after 3 to 4 days.

Can you make concrete with just sand?

Can I make concrete with just sand and cement? No, you can’t make concrete with only sand and cement. Concrete isn’t considered concrete without aggregates like gravel and stone. It’s the aggregates that contribute to concrete having high strength.

How many bags of concrete is 1 cubic yard?

You will need 60 bags of concrete mix to make a cubic yard of concrete. There’s 27 cubic feet of concrete in a yard.

How many bags of concrete per cubic feet?

Regarding this, “how many cubic feet are in a bags of concrete?”, it’s depend on bag size and their weigh in pounds, generally each 60lb bag of concrete mix will yield approximately 0.45 cubic feet when mixed, thus there are 0.45 cubic feet in a bag of 60lb concrete.

When was concrete cinder?

Of these varied archaic systems, cinder concrete slab construction became one of the most dominant structural slab systems used from the 1920s to the 1940s.

How concretions are formed?

Concretions form inside sediments before they harden into rocks, when they are still soft, as minerals within a sediment precipitate, sometimes in successive layers around a nucleus such as a shell or pebble. … If the planes curve around the concretion, it probably formed early after the deposition of the sediment.

Is a gravel driveway cheaper than concrete?

Got a long driveway? Depending on your budget, the cost to surface it with asphalt or concrete might be prohibitively expensive. Loose gravel stone, on the other hand, is a much more affordable option.

Why do they use a magnesium float on concrete?

Once your top is flat from screeding, use a magnesium float to flatten and smooth the top while opening the pores of the fresh concrete, allowing bleed water to evaporate and air to escape. Once the concrete is firm enough and all bleed water has evaporated, use a steel trowel for your final finish.

What is r rod in concrete?

Rebar (short for reinforcing bar), known when massed as reinforcing steel or reinforcement steel, is a steel bar or mesh of steel wires used as a tension device in reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension.

What is 5000 psi concrete used for?

Concrete footings and slabs on grade typically require a concrete of 3,500 to 4,000 psi. Suspended slabs, beams, and girders (as often found in bridges) require 3,500 to 5,000 psi. Traditional concrete walls and columns tend to range from 3,000 to 5,000 psi, while 4,000 to 5,000 psi is needed for pavement.

How to paint or stain a concrete fountain?

Paint the concrete with new stain. Leave the stain to dry then add a second coat to saturate the color or to eliminate blotchiness. After the stain fully dries, paint the fountain with a fresh coat of concrete sealer.

How to kill green algae on concrete?

The best way to remove green algae from concrete is to use a household cleaner known as bleach. Many people say to use water and vinegar; however, bleach is stronger and will keep the algae spores allowing those green algae to die faster and stay off the surface for longer.

How far apart should rebar be in concrete?

Place rebar in a grid pattern with a spacing between bars of approximately 12 inches. In either case, blocks should be used under the reinforcement to keep centered within the concrete. Synthetic fibers have also proven to be beneficial in driveways as a way to reduce shrinkage cracks.

How to get rid of white spots on stamped concrete?

Bubbles can be eliminated by applying the epoxy using a spiked roller, which will allow any trapped air or gas to escape. As for the white haze that developed in the sawcuts, the cause is either trapped moisture or the coating was applied too thickly.

Do i have to float concrete?

Float the concrete when you’re done grooving and edging (Photo 6). Floating removes the marks left by edging and brings the surface one step closer to a final finish. You may have to bear down on the float if the concrete is starting to harden.

How to smooth out concrete?

Finish by fine-tuning with light sandpaper, until the surface is perfectly smooth. We recommend using a hand planer to smooth and compact the surface. If the concrete dries a lot then we recommend that you add water to the surface, this will help you give it a good finish.

Is song a concrete or an abstract noun?

Hence, “musical note” and “song” are countable nouns, whilst “music” is uncountable (and this word cannot have a plural form). An abstract noun is a noun denoting an idea, quality, or state rather than a concrete object.

How to mix bags of concrete?

In terms of the ratio for concrete, it depends on what strength you are trying to achieve, but as a general guide a standard concrete mix would be 1 part cement to 2 parts sand to 4 parts aggregates. For foundations, a mix of 1 part cement to 3 parts sand to 6 parts aggregates can be used.

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