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Pea gravel for interior floor slab support - Geotechnical ,Jun 06, 2006· Six inches of pea gravel, I assume that the max particle size is 05" or so, should be fine support for most floor slabs I have used it beneath a waffle type slab on very expansive weak shales and/or hard clays The ribs of the slab bear on the pea gravel with a ,...

How to lay stepping-stones on gravel Guide on laying ,Step-by-step instructions on how to lay stepping-stones on gravel Watch our video or look at our pictures of the methods we used when we laid out stepping stones on a graveled pathway Read our hints and tips on the best way to lay individual paving slabs ,...

compacting gravel under a slab - JLC-Online ForumsDec 07, 2004· Re: compacting gravel under a slab Thanks for your comment Dick, but hopefully they'll be no "oozing" of concrete into the gravel under this slab I'll have a layer of thick poly ontop of the gravel then a layer of 2 inch rigid insulation under the slab...

How to Prepare the Ground Before Pouring Concrete Slab ,Determine the proper depth by establishing the height of the concrete slab Add 2 inches to the depth for gravel if the soil is normally moist or has a high concentration of clay Most concrete slabs will sit 1 to 2 inches higher than the dirt and 2 to 3 inches below the surface of the dirt, making the needed depth of the hole 3 to 5 inch...

Subgrade and Subbase for Concrete Slabs - theconstructororgSubbase for Concrete Slab Subbase is a layer of gravel, which is fairly cheap material, placed on top of subgrade The subbase placement is optional and it serves as a work platform for construction of the slab and provide more uniform support for the slab...

gravel under concrete slab? is it absolutely required ,Is gravel absolutely required NO but it is a good idea Most the time i see slabs poured directly on earth the owners are doing it themselves and the base is not level or has hol If a slab is not a uniform thickness this can cause cracks even with reinforcement of fiberglass, mesh or rebar...

How to Build a Concrete Pad - Lowe's Home ImprovementConcrete pads make great landings for deck stairs, or in front of doorways , How to Build a Concrete Pad Concrete pads make great landings for deck stairs, or in front of doorways , Pour the mixed concrete into the frame on top of the gravel Step 7 Screed the concrete by drawing a straight 2 x 4 across the surface...

Paving Expert - AJ McCormack and Son - Laying gravel over ,I have an existing concrete/tarmac base that is looking tatty and I want to cover it with gravel - is this a good idea? There's a couple of problems in covering any existing hard surface, whether it's concrete, bitmac or anything else, with a loose surface dressing such as gravel...

Quikrete 50 lb All-Purpose Gravel-115150 - The Home DepotIs this gravel good for drainage for fire pit? I have dug a 24in deep by 12in wide hole in the middle of my wood burning Concrete fire pit in fill it up with that gravel And I am trying to make sure it is ok for good drainage before I add 2"play sand and lava rock on top I could not find any Quickrete 3/4 gravel...

Pouring a concrete slab: Prepare the Ground & Drainage ,Jul 28, 2016· Pouring a concrete slab foundation: Prepare the Ground & Drainage Skip navigation Sign in Search Loading, Close This video is unavailable Watch Queue Queue...

CONCRETE MIXING RATIOS - Everything About ConcreteFor very small projects, such as setting a mailbox post or doing repairs, you may want to purchase a packaged concrete mix Such a mix combines cement, sand, and gravel in the correct mixing ratios and requires only the addition of water to create fresh concrete...

Sand under slab instead of gravel - GreenBuildingTalk ,Mar 04, 2013· Wondering what people think of omitting gravel as a base under a radiant slab?Our sand is pretty damp and we would like to get our slab poured ASAP Given that we have pure sand my thinking is that the water will drain down (very good drainage on our site...

How to Lay Slabs: 8 Steps (with Pictures) - wikiHowJun 30, 2019· A slab is a structural element used for flooring (similar to tiles but larger in size and usually made of concrete instead of ceramic) You can lay slabs for paving hard surfaces on sidewalks, entrances, patios and more While the types of slabs available vary greatly, the principles and methods of laying slabs ,...

How To Pour A New Concrete Slab Over An Older Damage SlabHow To Pour A New Concrete Slab Over An Older Damage Slab , It might work depending on all the conditions because the slab would be better than just the gravel but if there are voids under the slab that allow the original slab to heave in wet or cold conditions then you are basically on your own as any type of warranty would be worthless ....

Proper Subgrade Prep| Concrete Construction Magazine ,Sep 20, 2007· With slab-on-grade foundations, an alternative to native soil material may be used to restore grade These imported fills may include granular materials such as sand, gravel, or crushed stone These high-strength and permeable materials offer low compressibility, which is ideal for a slab ,...

Compact Fill Under Slab - Ask the BuilderDEAR TOM: Un-compacted fill under concrete slabs of any type is a recipe for disaster The slab could be for an entire home, it might be an exterior patio slab, a front porch slab, a driveway, etc Concrete is an amazing material, but it has an Achilles heel...

How to Pack Down Rock Before Pouring Concrete | Home ,Excavate the soil to a depth of 8 inches, allowing 4 inches for the gravel base and 4 inches for the concrete slab The soil should be graded, or sloped, so the excavation site's center is ....

How To Pour A Concrete Slab For A Shed - Zacs GardenThis is how to pour a concrete slab for a shed, taken from my recent slab pour - with pictur Shed; , But you should also allow some room for the gravel The gravel will help the concrete sit on something a bit firmer than dirt and the gravel will compress to make a base that is quite hard...

Shed Base: Concrete Slab or Gravel? | DoItYourselfThe gravel is easier to remove and move than tearing up a concrete slab What do local zoning and building ordinances say? Some locales consider any building, no matter how small or large, to be a permanent structure if it is erected on a concrete slab...

Concrete Mixtures - Engineering ToolBoxConcrete Mixtures - Cement, sand and gravel mixtures; Concrete Slab Load Capacity - Load capacity of simply supported concrete slabs; Concrete Slab Thickness - Recommended thickness of concrete slabs; Concrete Walls - Estimate volume in concrete walls; Earth Pressure Acting on Basement Walls - Lateral earth pressure on basement walls; Gravel ....

Tips for Creating a Custom Hot Tub Pad | The Cover GuySep 05, 2013· Tips for creating a custom hot tub pad By Jay Labelle | On Sep 5, , synthetic options that a lot of hot tub owners are using because they are less expensive and quicker to install than concrete or wood One of the most used products for hot tub and spa bases is the Handi-Spa Pad , A gravel bed is another great way to pad the bottom of ....

Concrete Calculator - Estimate Cement, Sand, Gravel ,Once, the quantities are determined, it is easy to estimate the cost of a concrete block, driveway, patio, yard or any other structure with the price prevailing in your area To find the amount of ready mix concrete for a slab, you can estimate it with a standard volume calculator...

How To Find The Right Concrete Mix - The Home DepotFast-setting concrete: A blend of fast-setting cement, sand and gravel, this concrete is ideal for setting post or pouring slabs that need to be ready to use quickly This mix usually sets in about 20-40 minut High-strength concrete: Pre-mixed of cement, sand, gravel and additives, this concrete blend is perfect to use as a foundation ....

Concrete Calculator - Estimate Cement, Sand, Gravel ,Once, the quantities are determined, it is easy to estimate the cost of a concrete block, driveway, patio, yard or any other structure with the price prevailing in your area To find the amount of ready mix concrete for a slab, you can estimate it with a standard volume calculator...

why is it important to have gravel under a concrete slab ,Mar 24, 2010· Gravel on the other hand is used for softer ground surface areas like damp areas and ironically beach lines (if you build on sand in a sandy area, too much sand may move from either side of slab and crack it) as so there is a solid foundation as to build your slab on generally 4 inches is a good thickness,hope this helps...

Proper Subgrade Prep| Concrete Construction Magazine ,Sep 20, 2007· With slab-on-grade foundations, an alternative to native soil material may be used to restore grade These imported fills may include granular materials such as sand, gravel, or crushed stone These high-strength and permeable materials offer low compressibility, which is ideal for a slab ,...

Pouring & Finishing Concrete Slabs - QUIKRETEPouring & Finishing Concrete Slabs; HOW-TO VIDEOS , Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete Step 2 Check the forms for level (¼ inch for every 12 feet is sufficient to allow for rain run-off) Patio and sidewalk forms should slope evenly away from structur...

Aggregate in Concrete - The Concrete NetworkBoth gravel and crushed stone are generally acceptable for making quality concrete (Photo 9), although gravel is usually preferred for exposed aggregate The use of recycled concrete, crushed to proper-size concrete aggregate, has also demonstrated successful performance...

2019 Install A Cement Slab Costs | Average Cost To Install ,Cost To Install A Cement Slab can vary greatly Use this calculator to estimate the cost for your home in your zip code , Before pouring the concrete, the mason applies a layer of gravel or granular fill for drainage and stability Rebar is also used to reinforce the slab...

Concrete Calculator - Slab | How To Calculate Concrete - OmniConcrete slab cost This calculator makes working the cost of a concrete slab easy - once you know how much concrete you need (in bags) and how many slabs you'll produce out of it, simply provide the price of the bag and you'll receive the concrete slab cost, a cost to pave your desired area, cost per unit of volume and the total cost of the material you need...