why do i need crushed stone under concrete

Aggregates - cementorgThe Recommended Gravel Base for a Concrete Driveway - Home

Aggregates are inert granular materials such as sand, gravel, or crushed stone that, along with water and portland cement, are an essential ingredient in concrete For a good concrete mix, aggregates need to be clean, hard, strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the .The strength and durability of a concrete driveway are not only determined by the type of concrete mix but also by base or sub-base over which it's poured A layer of gravel placed between the.

live chat

What should the ratio of crushed rock and sand for a paver ,Should vapor barrier in slab be under 4 in of gravel or

The method is much different in the frozen north than the sunny south I do not like crushed stone with a gravel overcoat the sand will eventually settle into the stone and leave voids under the pavers I am a firm believer in stone dust 3/8 stone dust, wetted and compacted is like a concrete baseMay 03, &#; 2-part question: 1) I'm building a 2-car garage with upstairs apartment in zone 4, 26' x 28' getting different opinions on whether the vapor barrier -6ml plastic- should be under the 4'' of gravel or on top of the gravel directly under slab? Some are saying it is not good to pour concrete right on plastic, although this seems to be the most common way to do it.

live chat

Concrete Slab - How to install a slab from start to finishGravel Under Footings, Thickened Slabs, Any Concrete

It doesn't have a foundation or any concrete walls under it or around it In Maine we install a lot of slabs-on-grade for houses and garag , THE TOOLS YOU NEED TO BUILD A CONCRETE SLAB , Click on CONCRETE MIXING RATIOS to learn what the correct proportions of cement, sand, stone, and water are to mix your own concrete by handSep 23, &#; Gravel Under Footings, Thickened Slabs, Any Concrete Bearing Item , "Gravel Under Footings, Thickened Slabs, Any Concrete Bearing Item" As long as it's not feet deep and loose is a good thing , the stone is actually extending the bottom of the concrete to the soil because the stone is so much stiffer than the soil and has a considerably.

live chat

Choosing Best Gravel For Concrete Pad - Concrete & Paving ,Compact Fill Under Slab - Ask the Builder

Jan 06, &#; how do you choose? I've used pebble gravel (the rounded off gravel) which I would think provides the best drainage but also used a 5/7 gravel can 5/7 always be used or can crush and run be used in Choosing Best Gravel For Concrete Pad - Concrete & Paving - Contractor TalkCompact Fill Under Slab - Concrete bends and breaks Use self-compacting fill Water helps compact Concrete block ledges on footer , The steel bars need to be placed so they line up with the concrete block pilasters , If you have to use crushed stone, be aware that it requires mechanical compaction so the pieces of gravel interlock.

live chat

Flagstone Patio on Crushed Stone - Ask the BuilderWhy do I need a Crushing and Screening Plant General

They are a by-product of the rock-crushing process and are a very important component for the base material under your proposed patio If you were to use just crushed limestone with no fines, the flagstone would have a good base, but not the best The introduction of these fines is what allows the crushed limestone to mimic poured concreteApr 20, &#; This permit allows activity requiring crushed stone and/or the production of concrete Crushing and screening plants produce crushed stone Concrete batch plants can also be operated under this permit to produce concrete This permit covers the following types of equipment: crushers, screens, pugmills, silos, boilers, internal combustion engines, baghouses, storage bins.

live chat

Patio Design: Understanding Crushed Stone - DoItYourselfCrushed stone - Wikipedia

Patio design with crushed stone is easy, practical and more affordable than pavers or poured concrete It stays confined between borders, and resists sinking below ground Its shape creates a mosaic effect on your patio surface Crushed stone is any stone material, including granite, shale or slate .Crushed stone is one of the most accessible natural resources, and is a major basic raw material used by construction, agriculture, and other industri Despite the low value of its basic products, the crushed stone industry is a major contributor to and an indicator of the economic well-being of a nation.

live chat

Gravel under concrete footing - GreenBuildingAdvisorGravel under concrete footing - GreenBuildingAdvisor

Apr 01, &#; Crusher-run gravel compacts well but does not drain very fast -- at least not as fast as 3/4-inch crushed stone (no fines) Talk to a soils engineer if you are worried -- but in my experience, either crusher-run gravel (compacted) or 3/4-inch crushed stone can be used under footings So can rigid foam An engineer may disagreeApr 01, &#; Crusher-run gravel compacts well but does not drain very fast -- at least not as fast as 3/4-inch crushed stone (no fines) Talk to a soils engineer if you are worried -- but in my experience, either crusher-run gravel (compacted) or 3/4-inch crushed stone can be used under footings So can rigid foam An engineer may disagree.

live chat

Sand under slab instead of gravel - GreenBuildingTalk ,Soil Under Slab - No Crushed Stone Used - Building

Mar 04, &#; I'd want to know why the sand is so wet in the first place If it's just due to weather exposure and would drain/dry if under cover, that's one thing If it's due to high water table, I might be inclined to build up the slab area with crushed stone (aka "gravel" in ,Sep 05, &#; Normally crushed stone is used under the slab for three reasons: 1 It is easily compacted, hence will form a very strong surface to place concrete on, minimizing the potential for settlement of the concrete 2 It is highly permeable, hence allows moisture under the concrete to drain away from beneath the slab 3.

live chat

Do I need crushed stone/gravel under my retaining wall ,Do you need to put gravel under a concrete pad? - Yahoo

Apr 22, &#; Do I need crushed stone/gravel under my retaining wall? I am rebuilding a wall next to my driveway out of the home depot block rocks/retaining wail rocks The deal is, that the root system behind the wall has held it all together, so there won't be a lot of pressure How necessary is doing compacted stone/gravel, and how deep if I'm .May 12, &#; well, you need to remove any and all black dirt first Reason for this is because black dirt can compress, and as it does this the concrete will have a void under it, and eventually crack-either from water that gets under and freezes, or just because there's nothing under it to support it.

live chat

compacting gravel under a slab - JLC-Online ForumsSubgrades & Subbases for Concrete Slabs - The Concrete Network

Dec 07, &#; Re: compacting gravel under a slab Tucker: With 2 to 3 feet of rock, I fail to see why you need either poly or insulation under the slab, I think I would opt for the "oozing" and the thickening effect of the "waffle" bottom, I would think that structurally it turns a 3 1/2" slab into something more like a 6 or 8" slab from a structural standpointNow let's look at why we need to know how flexible the subgrade is To start with it's important to understand that a slab on ground is designed as "plain" concrete That means that we do not count on the reinforcing steel to carry any of the load But wait, you.

live chat

How important is gravel under a concrete sidewalk? (Home ,Choosing Best Gravel For Concrete Pad - Concrete & Paving

How important is gravel under a concrete sidewalk? I got an estimate from a company on your list to replace my old, beat-up concrete sidewalk When they dug up the old sidewalk, there was no gravel underneath, and they wanted several hundred more dollars to dig out some of the dirt and put in a gravel bed - is this necessary?Jan 06, &#; how do you choose? I've used pebble gravel (the rounded off gravel) which I would think provides the best drainage but also used a 5/7 gravel can 5/7 always be used or can crush and run be used in Choosing Best Gravel For Concrete Pad - Concrete & Paving - Contractor Talk.

live chat

gravel under concrete slab? is it absolutely required ,How Much Base Material Do I Need for Walkways, Patios and

gravel under concrete slab? is it absolutely required? Ask Question 4 so, I have a post-frame shed, 12x16 there are posts at 6' on the short sides and every 4' on the long side posts are set ~18" below grade, on a 2" cap of cement over a few inches of well compacted gravel, holes were all about 27" or so, 2x6 girder runs level at the top .How Much Base Material Do I Need? Deciding the correct amount of walkway base material is actually quite simple For sidewalks and patios or any other light duty areas you will only need a 4 inch base of 3/4 inch quarry process or RCA beneath a 1 inch layer of concrete sand.

live chat

Information on the Do's and Don'ts concerning Foundation ,Key to a sound concrete slab is compact fill underneath

Information on the Do's and Don'ts concerning Foundation Drainage Concrete or Masonry Foundations (NEC R) Drains shall be provided around all concrete or masonry foundations that retain earth and enclose habitable or usable spaces located below gradeAug 07, &#; DEAR TOM: Uncompacted fill under a concrete slab -- be it for an entire home, an exterior patio, a front porch or a driveway -- is a recipe for disaster.

live chat

Patio Design: Understanding Crushed Stone - DoItYourselfWhy Put gravel under concrete? - Google Groups

Patio design with crushed stone is easy, practical and more affordable than pavers or poured concrete It stays confined between borders, and resists sinking below ground Its shape creates a mosaic effect on your patio surface Crushed stone is any stone material, including granite, shale or slate .May 06, &#; Why Put gravel under concrete? Showing 1-28 of 28 messag Why Put gravel under concrete? , 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 , a Ready Mix truck tipped over and.

live chat

sitemap Shanghai SKS Company © 2000-2021 Copyrights.