• Potential Use of Crushed Concrete and Recycled Asphalt

    MSE walls with crushed concrete backfill should include adequate drains and high permittivity filter fabrics behind the wall to avoid drainage problems. 2. Concrete structures that have suffered sulfate attack cannot be crushed and used as backfill in MSE walls.Recycled Concrete: The Pros and Cons Crushed Stone, Sand,When a concrete sidewalk, road, parking lot, or structure needs to be excavated and replaced, the concrete is often discarded into a landfill. Because chunks of concrete are not biodegradable and are unable to decompose over time, the waste takes up a great deal of

  • Section 3010 Trench Excavation & Backfill

    2. Use only as topsoil outside of the pavement, unless otherwise specified or allowed by the Engineer. 3. Do not use in the pipe embedment zone. Table 3010.05: Class V Material Type Soil Group Symbol ASTM D 2487 Description Organic Soils (unsuitable for backfill) Organic clays of Backfilling, Concrete Construction Magazine,Mar 21, 2008· There are several methods that foundation contractors can use to reduce the likelihood of a problem. First, keep the height of the backfill to no more than 4 feet except at the corners or offsets until the deck is in place. Four feet of unbalanced backfill usually will not exert sufficient pressure to damage the wall.

  • Crushed concrete backfill Earthwork/grading engineering

    Jan 27, 2007· Clay backfill would be a no no in this instance as the walls aren't filled solid and I'm afraid the pressures would be too great. The slab will be 5"-6" thick and be reinforced to account for loads and the eventual settling of the fill below. The crushed concrete pieces are roughly golf ball to tennis ball in size and VERY VERY irregular in shape.Proper backfill for garage foundation DIY Home,Sep 07, 2017· “It’s crushed up concrete/rock/asphalt with fine particles in it. Designed for compaction. Typically you use a 3/4" washed gravel for backfill as it compacts well and allows water movement alleviating hydrostatic pressure. Definitely at a footing drain tile, and some choose to backfill ~8" against the wall. Do not use flat bottom

  • 210 Structure Backfill

    Do not use crushed concrete or reclaimed asphalt. (2)Ensure that the material provided has a liquid limit less than or equal to 25 and a plasticity index less than or equal to 6. The contractor may substitute type A for type B material. 210.2.2 GradationBackfill question Trouble Free Pool,Aug 11, 2015· Is the road base product primarily crushed concrete? That's what I ended up using to backfill. It was $9.75/ton for 50 tons, which was about half the cost of anything else. It consists of a mix of particles from about 1" down to fine grains. It's very heavy and dense, making it

  • gravel under concrete slab? is it absolutely required

    We can use crushed stone as a capillary break if there are no fines in the crushed stones—but the stones don’t act as a vapor barrier. So it is common to use crushed stones with no fines as a capillary break—and then add a plastic sheet over the top of the stones in contact with the concrete as a Using broken up concrete as fill Renovate Forum,Apr 25, 2008· 1. you can dispose of the concrete rubble for free 2. you will need less soil to backfill the wall Cons: 1. the rubble is very large, and there will be lots of voids in amongst the chunks. If you top it off with soil, the soil will work its way down to fill these gaps over time, and with rain. This will result in significant subsidence at

  • 209 Granular Backfill

    particles or sand-sized particles mixed with gravel, crushed gravel, or crushed stone. Do not use crushed concrete or reclaimed asphalt. (2) Ensure that the material provided has a liquid limit less than or equal to 25 and a plasticity index less than or equal to 6. The contractor may substitute grade 1 for grade 2 material. 209.2.2 GradationBackfilling, Concrete Construction Magazine,Mar 21, 2008· There are several methods that foundation contractors can use to reduce the likelihood of a problem. First, keep the height of the backfill to no more than 4 feet except at the corners or offsets until the deck is in place. Four feet of unbalanced backfill usually will not exert sufficient pressure to damage the wall.

  • Does Anybody Use Sand as a Base Before They Pour Concrete

    One reason it is used as a backfill or sub-grade material. As with all material, it has to be placed correctly and compacted properly. Sand needs to remain damp as well as other material before placement of the concrete. If you want to build a road, use gravel, but this does not mean you will not have issues.Proper backfill for garage foundation DIY Home,Sep 07, 2017· “It’s crushed up concrete/rock/asphalt with fine particles in it. Designed for compaction. Typically you use a 3/4" washed gravel for backfill as it compacts well and allows water movement alleviating hydrostatic pressure. Definitely at a footing drain tile, and some choose to backfill ~8" against the wall. Do not use flat bottom

  • Backfill question Trouble Free Pool

    Aug 11, 2015· Is the road base product primarily crushed concrete? That's what I ended up using to backfill. It was $9.75/ton for 50 tons, which was about half the cost of anything else. It consists of a mix of particles from about 1" down to fine grains. It's very heavy and dense, making it Want to use crushed brick as a base for concrete patio,May 01, 2012· Hi, I am currently in the middle of building my new home. The masons just finished and left me a yard full of broken bricks. I need to build a small 8x10 slab that ranges from 4 inched deep to 15 inches deep, (slope of the land) and I remember hearing that crushed brick is a good base for concrete.

  • Concrete is a no-no for fence posts National Columns

    May 12, 2012· 5. Slowly shovel in equal parts crushed rock or sharp gravel and soil, tamping between layers, until you get to ground level. For years I’ve been using an oddly curved length of 2 DEPARTMENT OF TRANSPORTATION,Feb 27, 2014· Use material meeting the requirements of Section 800, Class A or B aggregate, and SOP 1. Crushed concrete may be used provided it meets the requirements of Section 800 that are applicable to Group 2 Aggregates. Do not use backfill aggregate containing soil or decomposed rock. 2. Gradation Use material meeting the following gradation requirements:

  • Backfilling Your New Home Foundation. Quality

    Examples of organic material that will decompose include top soil, tree roots and stumps, scraps of wood,etc. By using fill dirt already on the lot, you can save a great deal of money. If there is not enough quality fill dirt on site, stone (or gravel) will most likely be trucked in and used when backfilling Fill Dirt or Fill Sand: How to Pick the Right Material,You should also keep in mind that fill dirt can absorb and retain moisture which means that it’s not always ideally suited for backfill projects around water sources. Fill Sand Benefits and Considerations. Fill sand is characterized by its extremely fine particle sizes. The minute pieces of sand fit together nicely and create a firm surface.

  • Pipe Bedding and Backfill

    Backfill The backfill is the material used to refill the trench after the pipe and the embedment have been placed. Cover The cover is the depth of backfill over the top of the pipe. Even though some specifications, manuals, and handbooks use 'unit weight," the 02255-Bedding, Backfill, and Embankment Materials,single source. Uncrushed gravel are not acceptable materials for embedment where crushed stone is shown on the applicable utility embedment drawing details. 6. Crushed Concrete: Crushed concrete is an acceptable substitute for crushed stone as utility backfill. Gradation and quality control test requirements are the same as crushed stone.

  • Using recycled concrete and asphalt Earthwork/grading

    Oct 23, 2007· I do not have experience using recycled concrete and its performance. From what I have read, it can be used as fill for roadbeds and backfill behind MSE walls. For the asphalt, there is currently existing asphalt in place, they would like to just mill up the existing 2 to 3 inches of asphalt and immediately compact it behind the milling processStrength and stiffness of compacted crushed concrete,Dec 01, 2013· In Japan and many other countries, a great amount of crushed concrete aggregate (CCA) is being and will be produced by demolishing old and/or out-of-service concrete structures. The use of CCA as the backfill of soil structures, such as embankments and retaining walls, replacing costly selected natural backfill soil (i.e., well-graded gravelly

  • Proper backfill for garage foundation DIY Home

    Sep 07, 2017· “It’s crushed up concrete/rock/asphalt with fine particles in it. Designed for compaction. Typically you use a 3/4" washed gravel for backfill as it compacts well and allows water movement alleviating hydrostatic pressure. Definitely at a footing drain tile, and some choose to backfill ~8" against the wall. Do not use flat bottomBackfilling, Concrete Construction Magazine,Mar 21, 2008· There are several methods that foundation contractors can use to reduce the likelihood of a problem. First, keep the height of the backfill to no more than 4 feet except at the corners or offsets until the deck is in place. Four feet of unbalanced backfill usually will not exert sufficient pressure to damage the wall.

  • State-of-the-Art Techniques for Backfilling Abandoned

    sidence control and have been replaced with the use of pumped concrete forin-mine construction. Cribbingmade from timber or concrete blocks remains the onlytype of hand-constructed support used today. Inherent to remote backfill systems isthe problem of tracking the placement of the backfillCrushing brick blends for sub-base applications Quarry,Mar 19, 2020· This paper primarily focuses on the applicability of crushed brick blends with crushed concrete in pavement sub-base material as well as bedding and backfill material for drainage systems. The engineering properties of crushed brick blended with crushed concrete were investigated by means of laboratory testing.

  • Flowable Fill Concrete Properties, Uses, Benefits

    Flowable fill concrete is a self-compacting cementitious slurry consisting of a mixture of fine aggregate or filler, water, and cementitious material which is used as a fill or backfill in lieu of compacted-soil backfill. This mixture is capable of filling all voids in irregular excavations and Proper Subgrade Prep, Concrete Construction Magazine,Sep 20, 2007· All too often, builders do not adequately prepare the subgrade for concrete foundations, sidewalks, driveways, or patios. The concrete contractor is responsible for ensuring that granular backfill receives proper compaction, density, and moisture levels prior to the placement of concrete.

  • Building a Retaining Wall: 8 Dos and Don'ts Bob Vila

    DO choose a material you can easily work with. Retaining walls can be constructed using a variety of materials, from poured concrete and large timbers to natural stones, even bricks.Backfilling Your New Home Foundation. Quality,Examples of organic material that will decompose include top soil, tree roots and stumps, scraps of wood,etc. By using fill dirt already on the lot, you can save a great deal of money. If there is not enough quality fill dirt on site, stone (or gravel) will most likely be trucked in and used when backfilling

  • Concrete vs crushed gravel for fence posts in clay soil

    I'm leaning towards using crushed gravel as it's easier to repair posts if they rot. I'm just worried that with clay soil it will just fill with water and stay there for days. I'm not 100% sure the concrete would help that though as I assume water would still get in to the post and sit there.Fill Dirt or Fill Sand: How to Pick the Right Material,You should also keep in mind that fill dirt can absorb and retain moisture which means that it’s not always ideally suited for backfill projects around water sources. Fill Sand Benefits and Considerations. Fill sand is characterized by its extremely fine particle sizes. The minute pieces of sand fit together nicely and create a firm surface.

  • Ways to keep basements and crawlspaces dry Pro Builder

    Mar 28, 2017· Backfill: Backfill in small lifts a few feet at a time and use a compactor on each lift. (This is the method used for highway grades to prevent roads from settling under heavy traffic.) (This is the method used for highway grades to prevent roads from settling under heavy traffic.)Compaction and Breakage Characteristics of Crushed Stone,The subsidence of urban pavement is becoming frequent accidents, and backfill is the primary means of remedy. Crushed stone is a commonly used aggregate for backfill material in engineering, and its compaction behavior under load needs to be well understood. In this work, a series of compaction tests were carried out on the same batch of crushed stone samples with the same gradation.

  • Use of Foamed Concrete for Trench Reinstatement

    (i) Use of unsuitable backfill materials, due to composition or incorrect water content. (ii) Inadequate compaction of backfill, as existing methods do not give full compaction or restore full lateral support to the trench walls. Traditionally excavations were filled using granular materials, usually crushed stone. The major problem with02255-Bedding, Backfill, and Embankment Materials,single source. Uncrushed gravel are not acceptable materials for embedment where crushed stone is shown on the applicable utility embedment drawing details. 6. Crushed Concrete: Crushed concrete is an acceptable substitute for crushed stone as utility backfill. Gradation and quality control test requirements are the same as crushed stone.