What is Hydro demo?
Hydrodemolition (also known as hydro demolition, hydroblasting, hydro blasting, hydromilling, water blasting, and waterjetting) is a technique that utilizes high-pressure water to remove deteriorated and damaged concrete as well as asphalt and grout.
Why use hydro Demolition?
Using high pressure water jets to break concrete, hydro-demolition allows access to restricted areas and enables operatives to work safely, removing the problem of vibration injuries. The method has a faster removal rate, less noise, less dust and less damage.
Can you cut concrete with water?
A high flow high-pressure water jet can cut through concrete by eroding the cement. At high pressure with a lower flow, water can actually remove coatings without damaging the sound concrete below. Add an abrasive to the jet and water can completely cut through a concrete slab with rebar inside.
Is it better to cut concrete wet or dry?
Cleaner job site: During wet cutting, water combines with dust, creating a concrete slurry. While this minimizes dry particles in the air, it creates a mess to clean. Dry cutting creates a cleaner job site and can be combined with a dust extractor or vacuum to remove dust.
What is the best tool to cut concrete?
Use a standard circular saw, equipped with a corundum or diamond blade, for small tasks. For slabs, it’s best to cut through the top inch, then use a sledgehammer to break off the rest. The jagged edge left below the cutting line provides a good rough edge for the new concrete to bond to.
Should I use water when cutting concrete?
Keeping the blades cool with the constant spraying of water while it cuts through concrete will minimise the effect of wear and tear and will significantly improve or prolong the lifespan of the blade and the concrete saw in general.
How do you break thick concrete?
Start to break the concrete, starting six inches from the edge and working your way in. For slabs less than four inches thick, use a sledgehammer. For more than four inches thick, use a demolition hammer.
Can you cut concrete yourself?
With a diamond blade and proper safety precautions, you can cut through concrete for your sidewalk, countertop, patio, or DIY project. Whether you want to create a countertop or expand your sidewalk, cutting concrete yourself may not be as daunting as you imagine.
How do you break up large chunks of concrete?
Instructions
- Dig Under the Concrete. Dig out the soil, gravel, or other material from under the concrete, using a shovel and a pickax or mattock.
- Strike the Concrete. Lightly sprinkle the concrete with water to minimize dust.
- Pry Off Stubborn Pieces.
- Move the Concrete Chunks With a Hand Truck.
What is the best tool for breaking up concrete?
jackhammers
A jackhammer is an ideal power tool used for concrete demolitions, and four subcategories of jackhammers exist, including rotary, demolition, combination and breaker options. Each specializes in a particular task for various applications.
What happens if you don’t cut concrete?
Late sawing can result in random concrete cracks. Shallow cracks aren’t sufficient to prevent uncontrolled cracking while deep cuts are excessively labor intensive and undermine the aggregate interlock in the concrete.
How do you break thick concrete without a jackhammer?
Busting up Concrete Without a Jackhammer – YouTube
What is the best tool to break concrete?
What is the easiest way to break up concrete?
Do you need rebar for 4 inch slab?
Concrete patios range in-depth. In situations where the thickness of concrete is less than 5 inches in depth, reinforcement becomes unnecessary. But as the depth grows, so does the need for reinforcing the structure. Generally, you do not need rebar for a 4-inch slab.
How long can you wait to cut concrete?
For most concrete work, cutting should take place within the first 6 to 18 hours and never beyond 24 hours. Smaller early-entry saws are available, which may allow cutting to begin within a few hours after placement.
How do you remove 2 inches of concrete?
You can remove 2 inches of concrete with a hammer. Begin by slamming the sledgehammer into the concrete along the slab’s edge. To make new cracks, strike different regions of the surface. Allow gravity to do as much work as possible for you.
Do you need gravel under concrete?
You do need gravel under a concrete slab, footing, or patio. Gravel provides a solid foundation for your concrete as it can be compacted. It also improves drainage, preventing water from pooling beneath the concrete.
Can I use chicken wire to reinforce concrete?
Chicken wire or wire mesh can be safely used as a reinforcement in concrete when the concrete is not used in structural or high-weight areas. The wire mesh or chicken wire can add stretching strength that concrete does not have, giving the concrete rigidity when facing specific pressures.
Will concrete crack without rebar?
Without rebar reinforcement, concrete is highly prone to cracks due to tension forces. Rebar helps prevent cracks from growing wider largely by preventing cracked slabs from moving apart.
How deep should you cut concrete?
Cutting Depth
When concrete saw cutting, aim to cut to a depth of one quarter to even one-third of the concrete slab thickness. When cutting concrete with a circular saw you don’t want to cut too shallow or else risk random cracking.
How do you break up thick concrete?
How hard is it to jackhammer concrete?
HOW TO JACK HAMMER CONCRETE EFFICIENTLY – YouTube
What happens if you don’t put gravel under concrete?
Because concrete is a very porous material, it will absorb any moisture that it contacts. This can cause pooling. Without crushed stone, pooling water will settle under it and erode your slab. Adding a layer of crushed stone will add proper drainage, as well as create a barrier between your slab and the ground.
Is wire mesh better than rebar in concrete?
Wire mesh is generally cheaper to use than rebar since it utilizes only thin steel bars. Rebar’s cost depends on the bar’s thickness and thus varies considerably. Thicker rebar offers more significant support and flexural strength enhancement than rebar, but this isn’t always needed in the structure.