does anybody use sand as a base before they pour concrete,otherwise, what is under a slab depends on the ground you are pouring the slab on, some soils don't need anything, some need a lot of help. from american concrete institute aci360r-10 guide to design of slabs-on-ground 4.5 design of slab-support system 4.5.1 general 'after subgrade soils have been classified, the general range of k values can.the best concrete mix for footings | what's the difference,the best concrete mix for footings is actually pretty easy to make. it’s 1 part portland cement, 2 parts sand and 4 parts stone aggregate by volume. add in 3 quarts water per 80 pounds of dry concrete. aggregate should be between 1/2 – 1 inch in size. that’s it. concrete is a fantastic building material that’s very easy to make..subgrades and subbases for slabs| concrete construction,almost 20 years ago, concrete construction investigated the effect of using a layer of loose (uncompacted) sand directly beneath a concrete slab and concluded that this practice contributed to “more later-age cracks and poorer joint performance.” here are the reasons not to use a sand layer: · difficult to maintain a flat, level sand surface during concrete placement · difficult to.the construction and design of concrete slabs on grade,concrete slabs on grade are a very common type of concrete construction. floor slabs can range from a simple residential basement slab to a heavy-duty industrial floor. however, no matter how basic or complex the floor is, the construction method is similar and includes; preparing the sub-grade and sub-base, placing the reinforcement and.
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the 4000 crusher is the only small crusher to accept a full uk kerb stone. the crusher is capable of crushing concrete, bricks, kerb stones, grave stones, blocks, paving slabs, roof tiles and old asphelt. easy to operate – training will be given at the start of each hire to ensure everybody operating the machine can do so efficiently and n,chipping hammer & other concrete breaking tools - the,hydraulic concrete crusher. hydraulic concrete crushers are used to demolish concrete methodically and efficiently. also called smashers, densifiers, processors, secondary crushers, and pulverizers, concrete crushers are used to reduce concrete into smaller easily manageable or recyclable pieces, as well as to separate steel reinforcement from
vevor update 3500w electric breaker, 230v electric demolition jack hammer drill, 1800 r/min chisel concrete road breaker 360° foregrip for crushing concrete 4.2 out of 5 stars 35 £138.99 £ 138 . 99,mini concrete crusher purple pulveriser - micro machine hire,welcome to the micro machine hire homepage. we are an independent plant hire company that specialises in mini and micro concrete crushers. our crushers are usually hired out to landscape gardeners, builders, demolition experts and diy property developers. you can hire a crusher to recycle concrete, brick, granite, paving, block, stone, tarmac and more into useable aggregate such as
concrete block often appears after building and bridge demolition, which will cause problems like pollutions and land waste. there are mainly 5 types of concrete crushers like portable concrete crusher, mobile concrete crusher, small concrete crusher, excavator concrete crusher and bucket crusher, so you have to choose the right crushing machine according to your own situation.,concrete crusher hire | concrete crusher hire covering,recycle = concrete, bricks, blocks, slabs, natural stone, setts, kerbstones etc. name. input size. small patio job where 4ton of concrete is crushed and used as a sub base, saving on skip hire and new mot. crusher hire. total saving. 4. 1. £150. £150. £40. £160. £99. £211. hi-c40. large concrete driveway where 18ton of concrete is
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.,how much gravel is needed for a concrete slab?,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. 34 related question answers found because concrete slabs “float” on the soil, buying gravel in small quantities costs over $100 per ton.
step 4: pouring of concrete. fine sand or crushed stone is preferred for small thickness concrete and coarse aggregate is used for concrete of higher thickness. the mixture of aggregate and cement is mixed and poured it all into the existing concrete. hand trowel or a paver is used to spread the concrete evenly by pressing it hard.,can i use the crushed remains of an old concrete slab as a,crushed concrete is a very good substrate for a slab. the key is to not have chunks so large that air pockets are created. maybe bring in a layer of sand to fill the voids and level things a bit. a water rinse will help bring air out and compact the material.
mixing your concrete with reinforcing fibers and using reinforcing rods laid down on a 12-in. x 16-in. grid pattern greatly reduces the chance of crack formation. also, two weeks after pouring, use a masonry saw to make cuts one-third of the way through the thickness of your concrete slab. make these cuts in a 10-ft. x 10-ft. grid pattern.,importance of gravel and sand for concrete | hunker,smaller gravel particles equals a 'fine' grade of concrete. use the fine aggregate for concrete slabs or other smooth surfaces. a 'coarse' aggregate means using larger pieces of gravel. coarse concrete is helpful for sturdier projects. concrete with a coarse aggregate doesn't produce a smooth look or feel but is stronger than a finer grade.
what is the ratio for mixing concrete? one of the best concrete mix ratios is 1 part cement, 3 parts sand, and 3 parts aggregate, this will produce approximately a 3000 psi concrete mix. the strength of this mix ratio is good for most concrete slabs, footings, steps, and foundation walls.,don't get over charged! here's my concrete slab cost in detail,so a 32' x 24' x 6' thick concrete slab would cost $4608.00 included in my concrete slab price: 1. 3000 psi concrete with 3/4 inch crushed stone 2. 6' (inch) thick concrete 3. fibermesh in the concrete for reinforcement 4. a double row of 1/2' rebar around the edges 5.
concrete slabs calculator. building supplies; input length, width and depth of the area. click the button to calculate the volume of concrete and man-hours (not including mixing) needed for this job. this calculator is to be used as an estimating tool only. area. length.,5 smart ways to use a slab of concrete - bob vila,3. utility slab. one of the most common reasons for pouring a concrete slab in the yard is to provide a level multi-purpose surface for anything from outdoor air-conditioning unit to a trash can
as previously mentioned, use a crushed stone blend of 3/4' and smaller, we commonly call it modified and compact every 6' to 8'. another consideration is a pour ledge on the exterior walls combined with a reinforced 6' to 8' slab.,concrete resurfacing: how to resurface a concrete slab,the difference between a brand new concrete surface and one that has cracked and faded after years of exposure to weather is dramatic. cracks can develop due to moisture-deficient concrete or land settling, and spalling (flaking or peeling of the surface) develops when the original concrete mixture had too much water when it was poured and finished.
the environmental impact of concrete, its manufacture and applications, are complex.some effects are harmful; others welcome. many depend on circumstances. a major component of concrete is cement, which has its own environmental and social impacts and contributes largely to those of concrete.. the cement industry is one of the main producers of carbon dioxide, a potent greenhouse gas.,concrete crusher for sale | ebay,buy concrete crusher and get the best deals at the lowest prices on ebay! great savings & free delivery / collection on many items
the cost of a concrete slab generally falls between $3 and $10 per square foot, depending on factors like the thickness of the slab and whether frost walls are included or the slab is floating. for a 500- to 1,000-square-foot house, you can expect to pay around $5,318 for your slab. when making pricing decisions — such as choosing between a 4-inch, 5-inch or 6-inch slab — factor in what,concrete damage and frost heave – what you need to know,you have two options – slabjacking or slab replacement. slabjacking is a quick and simple fix for concrete damage. the repair involves drilling a few small holes in the damaged concrete, then pumping a cement slurry down into the ground underneath. the mixture fills air pockets within the soil, creating pressure and lifting the slab back into
what goes under the concrete in a slab-on-grade home? in the old days, not much — just dirt. eventually, contractors discovered that it made sense to include a 4-inch-thick layer of crushed stone under the concrete. the crushed stone provides a capillary break that reduces the amount of moisture flowing upward from the damp soil to the permeable concrete. since the crushed stone layer,crushed stone under concrete: why it's needed,when working with concrete slabs, it’s important to take the appropriate steps to ensure that it lasts for many years to come. in order to get the most use out of your concrete slabs, you need to add a layer of crushed stone beneath it first.placing crushed stone under concrete serves several purposes and can provide the following benefits.
byers concrete is your one stop shop for all your concrete projects. operating out of greenville, south carolina, tom and his folks understand customer satisfaction. they don’t just get the job done…they get it done safely, on time and to specs. at byers concrete, customer satisfaction is job one.,subgrade and subbase for concrete slabs - the constructor,subgrade and subbase for concrete slabs 1. subgrade for concrete slab the subgrade is considerably significant for concrete slab since concrete slab load and imposed loads are supported by subgrade. when required, concrete slab can be placed on the top of natural soil without the need for extra layers provided that it is clean and compactable.
a typical residential concrete slab is reinforced with welded wire fabric 6 x 6 – w1.4 x w1.4, which refers to the spacing in inches in each direction and the wire size number respectively. the reinforcing is laid onto the moisture barrier covering the crushed stone before the concrete is poured.,how to prepare a site for concrete: base, forms and rebar,a good base is everything! concrete will crack and crumble if it’s not poured over a solid, stable base. bringing in 4 to 6-in. of a good compact-able base is a good rule of thumb, but the exact amount of base a concrete driveway needs depends on the condition of the existing soil, the climate, and what you plan to park on your driveway.