why do i need crushed stone under concrete

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Patio Design Understanding Crushed Stone

17 11 2010  Crushed stone is one of the most reliable base materials you can use under a patio surface of pavers or slabs Dig a patio base 10 inches below grade and lay a flat base of 2 inches of sand After leveling place sheets of erosion reducing fabric over the sand Place a 6 inch depth of crushed stone on the fabric.

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why sand under concrete

19 08 2004  And Why is that a problem As I am told with the plastic directly under ninth the concrete all the water in a 5 inch slump has to go up and as it moves up and sits on top of the concrete to evaporate you get separation in the concrete because the water sits on top of it to long The concrete will not get to be the strongest it could be.

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would you use gravel/stone around foundation Houston

19 12 2015  That s why it s recommended to water your foundation during the summer or dry time of the year We can t control how wet it gets but we can control how dry to stop the house from being like an elevator Unless you have actual water draining from under the slab you do not need a french drain..unless you just like foundation issues.

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Stone for Your Drainage Ditch

22 08 2018  A swale is used the same way a drainage ditch is to manage water runoff but is most useful when you need to drain water the length of your property In this case boulders are useful For a medium sized simple front yard drainage ditch consider medium sized crushed stone In the Nashville area this will usually be made of limestone.

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Gravel under Concrete Slab

28 06 2016  Gravel under Concrete Slab Discussion in Hangar Talk started by coloradobluesky Jun 23 2016 coloradobluesky En Route Gone I ve seen it too many times where plans and permitting require it but when concrete fails prematurely boring reveals it never happened Then you have to involve lawyers N3368K Jun 24 2016 #16.

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Have pile of stones

I have 4 X14 X1 slab I want to pour to connect patio to garage stairs This would create nice level walkway from garage to house Back in my teenage days when I built a house with my dad we had massive pile of stones from digging out a foundation for the house.

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Why Put gravel under concrete

06 05 2010  gravel under the concrete I want to pour a driveway section in front of the garage and was told by a guy at the concrete company who came to measure the amount needed that I need to put gravel under the concrete WHY I should mention that I always put lots of small to medium sized rocks under concrete to save on the amount of concrete needed.

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Crushed Concrete Concrete Aggregate 101

29 07 2019  Crushed Concrete Driveway Crushed Concrete driveways are a much more cost effective driveway solution compared to gravel driveways regular concrete driveways or asphalt driveways With benefits like the price sustainability and the fact that it can never crack and require a repair crushed concrete

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Flagstone what to use sand cement or gravel

19 03 2014  I d put the membrane between concrete board and wood–not between concrete board and stone If using membrane at all Okay–so I just looked up the barrier you re talking about using I don t see why it s necessary here and I don t see just why you d need both the barrier and the concrete

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Determining What Size Crushed Stone You Need For Your Project

Crushed stone is used for a wide variety of projects from building roads to providing suitable drainage and from laying a base for pavers to enhancing the look of landscaping projects There are so many uses for this versatile material yet many people are unsure of what size they need when it comes to selecting the proper material for their project.

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Vapor barriers under concrete slabs

under concrete slabs Even though the use of a vapor barrier might be com the crushed stone and the concrete s l a b Although ACI 302 recommends putting a sand layer on the vapor barri er some specifiers require placing concrete directly on the vapor barrier When this is done however finishers may purposely punch holes in the va

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Subgrades and Subbases for Slabs Concrete Construction

22 11 2017  On top of the subgrade for most industrial slabs a subbase is placed Although the subbase is not mandatory it serves as a work platform for construction of the slab and a cushion for more uniform support of the slab Most road base material approved by the local DOT is suitable for the subbase We use 6 to 8 inches of crusher run

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Crushed Stone Vs

Crushed stone ranges in size from fine stone dust screenings to larger and heavier stones Gravel comes in various sizes that are larger than 2 mm in diameter starting from about a ¼ inch and going up to 2 inches or more Uses for Aggregates The most common use for crushed stone is as an aggregate for construction projects The angular

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Flagstone Patio on Crushed Stone

Q A / Flagstone Patio on Crushed Stone Outdoor Patio text Tim Carter DEAR TIM I intend to install a flagstone patio in the very near future and have been told I can place it on compacted crushed limestone that contains screenings What are screenings and will this method work The person giving the advice said the crushed limestone beneath the flagstones would eventually harden like concrete.

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FAQ for Sub bases

What you need to do is break up the bricks into quarters or smaller the smaller the better and then blind them with grit sand rock fines or crushed stone so that all the voids between the smashed bricks are filled and then compact the lot repeatedly running the vib plate or roller over the area until all the fines are rattled into the voids and you have a reasonable

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Installing Patio Stones 5 Easy Steps Shaw

Mark the proposed area for excavation in general excavate the area to an approximate depth of 4 6 Step 2 Fill excavated area with approximately 4 of granular A crushed stone Step 3 Compact crushed stone with a vibrating plate tamper This will provide a firm base and allow water to drain Step 4 In clay soils we strongly

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Understanding Crushed Stone Grades

The information below provides a general overview to help you choose the right material for your project #1 Crushed stone #1 is the largest of the crushed stone grades and includes stone that is between 2 4 inches This materials is great for larger jobs or for filling in larger holes #3 Crushed stone #3 includes stone between 1/2 and 2 inches.

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How to Crush Concrete Slabs Into Stone Sized Pieces

2 days ago  If a building is being demolished or renovated it is likely that a concrete floor slab will need to be broken up It will need to be crushed into small pieces which are easy to carry and could be reused elsewhere beneath roads footpaths or driveways.

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T5 waste exemption screening and blending waste

28 04 2014  grading waste concrete after it has been crushed to produce a You do not need to If you want to treat more than the amount of waste allowed under this exemption you need to apply for

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PDF Stone Dust in Concrete Effect on Compressive Strength

It is most essential to develop eco friendly concrete from stone waste this research study the PPC cement has been replaced by stone waste accordingly in the range of 0 10 20 30 40

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Aggregates for Concrete

Key points Aggregate is a term for any particulate material It includes gravel crushed stone sand slag recycled concrete and geosynthetic aggregates Aggregate may be natural manufactured or recycled Aggregates make up some 60 80 of the concrete mix They provide compressive strength and bulk to concrete.

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Reasons to Consider Crushed Stone Gravel or Recycled

Reasons to Consider Crushed Stone Gravel or Recycled Concrete as Ground Cover for Your Landscaping You won t have to replace rock and stone like you do mulch and no nutrients will need to be provided Crushed stone and gravel can

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Why Hardcore under concrete bases what effect does this

22 02 2009  Anywaythe reason why you need to use it instead of gravel is that you need to compact it to give a firm basethus you need the pieces of all sizes inculding the fines dust to bond together when compactedwith just gravel you won t get this bonding Hope that answers it for you Forum software strikes again LoL.

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When To Use Crushed Stone As Opposed To Gravel For A Project

Crushed stone is a versatile material and can also be used for many commercial residential and DIY projects Due to its modest cost and easy installation it is often used for horse riding arenas screenings and walking and bike paths screenings and 3/8 size as well as for drainage systems and as a base or sub base for residential crushed rock driveways and retaining walls.

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What can be done about voids under concrete

03 04 2016  Dealing with voids whether they be stable or dynamic is an important part of maintaining your concrete slabs whether they be residential commercial industrial or municipal If you see a void opening up under your concrete slabs give the concrete raising and leveling professionals a call we will get you taken care of 1 855 752 2522.

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Correct backfill material

08 07 2020  Using all clean crushed stone as backfill can invite surface water down to the sides and bottom of your pool That is why it is imperative to have a perforated pipe at the lowest point of any stone installed that out falls into a sump or daylight Functionally a pool can never be installed too high You just need to balance that with the

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why do i need crushed stone under concrete

Why Do I Need Crushed Stone Under Concrete Whether you pour concrete for a walkway or patio a strong gravel base is required to prevent the concrete from cracking and shifting Gravel is Whatever your requirements you ll find the perfect serviceoriented solution to

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Crushed vs Round aggregate in concrete

03 02 2012  Certainly crushed rock has better interlock and must have better shear friction for roughened surfaces I do not have the data but I would bet crushed rock is better in most or all performance measures The large aggregate used in ready mix concrete in my areaNorthern Californiais either crushed 1 x#4or river rock 3/4 .

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What Type Of Gravel Under Concrete Slab

What Type Of Gravel Under Concrete Slab Subgrades subbases for concrete slabs water leak under a concrete slab compact fill under slab concrete slab over the vault vapor ers necessary for bats preparing base for concrete slab you 3 reasons to use crushed stone under concrete slabs b r sand aggregates the difference between crushed stone and

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When To Use Crushed Stone As Opposed To Gravel For A Project

Crushed stone is a versatile material and can also be used for many commercial residential and DIY projects Due to its modest cost and easy installation it is often used for horse riding arenas screenings and walking and bike paths screenings and 3/8 size as well as for drainage systems and as a base or sub base for residential crushed

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The Complete Guide to Crushed Stone and Gravel

11 11 2019  Crushed stone If you hear the generic crushed stone term it usually refers to stone that has a mixture of stone dust in it This type of stone is best used for a base when heavy compaction is needed As a result it is typically used for the base of concrete and paving projects foundations of structures and driveway bases.

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Limestone Screening or Gravel as a Base Material To Make A

13 06 2012  If you were putting down uni stone it would be best to dress the top 4 over top of crushed stone so you would have a smooth flat surface to lay the stones Seeing you are using large paver stones it is fine to just use crushed stone You can level pavers on crushed stone easily.

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Crushed Stone Under a Spread Footing

17 12 2009  Yes If you have a fluctuating water table that impinges the bottom of the footing the fine sand and fines below the gravel can work their way into the gravel voids however that should not be significant RE Crushed Stone Under a Spread Footing DRC1 Civil/Environmental 23 Aug 09 23 20.

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