Backfill Crushed Concrete Do Not Use

  • backfill crushed concrete do not use - ecopub.be

    C. Use tamps and machines of a suitable type, which do not crush or otherwise damage the pipe. D. Backfill from 6" above the top of pipe to 24" above the top of pipe to be compacted to 85% relative density as determined by ASTM D-1557 modified proctor.

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  • backfill - what do you like? | Terry Love Plumbing Advice

    Feb 26, 2010· looks like he asked what to use for backfill. Backfill in this area is on top and around the pipe. Round or crushed, its a no-go. You cannot compact round river bed washed rock anyway - you need to mix it with fines and then we call it class 1 or 2 road base.

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  • 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.

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  • Crushed Concrete As Backfill

    Jan 27, 2007· Crushed concrete backfill Crushed concrete backfill jam6444 (Civil/Environmental) (OP) 26 Jan 07 10:29. I have a CMU "box" of dimensions 13'x28' with walls roughly 5' high. I'd like to fill it 90 percent with crushed concrete &then top it with some 8910, let it

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  • aashto specifications for crushed stone as backfill materials

    Effective with the December 2018 Letting 106 2019 Standard Specifications Section 210 Structure Backfill crushed gravel or crushed stone Do not use than or equal to 6 The contractor may substitute type A for type B material 21022 Gradation (1) Furnish granular backfill material with a gradation conforming to the following

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  • Crushed Concrete As Backfill

    Jan 27, 2007· Crushed concrete backfill Crushed concrete backfill jam6444 (Civil/Environmental) (OP) 26 Jan 07 10:29. I have a CMU "box" of dimensions 13'x28' with walls roughly 5' high. I'd like to fill it 90 percent with crushed concrete &then top it with some 8910, let it

    Get Price
  • Want To Use Crushed Brick As A Base For Concrete Patio

    Apr 30, 2012· Want to use crushed brick as a base for concrete patio 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.

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  • Section 210 Structure 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 type A for type B material. 210.2.2 Gradation

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  • Sand Vs. Gravel to Backfill French Drains | eHow

    The first back-fill should be washed, crushed rock or gravel that is 3/4 to 1 1/2 inch in diameter. Continue to fill the trench until a 12-inch depth remains from the rock up to the top of the trench. Overlap the filter fabric on top of the gravel. The remainder of the trench is then filled with the soil that was dug out when forming the trench.

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  • 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.

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  • Ways to keep basements and crawlspaces dry | Pro Builder

    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.)

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  • backfill - what do you like? | Terry Love Plumbing Advice

    Feb 26, 2010· looks like he asked what to use for backfill. Backfill in this area is on top and around the pipe. Round or crushed, its a no-go. You cannot compact round river bed washed rock anyway - you need to mix it with fines and then we call it class 1 or 2 road base.

    Get Price
  • How Much Does Crushed Concrete Cost? | HowMuchIsIt.org

    Aug 15, 2018· The 75-40 mm crushed concrete is suitable for use in horse racing showground sub-bases as well as for drainage layers. With recycle concrete, you will often see numbers next to the grades. 57, for example, is approximately 1 inch to 1.5 inches in diameter and is appropriate as a wall backfill.

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  • Section 608 Storm Sewer

    608.2.2 Backfill 608.2.2.1 General (1) Furnish materials consisting of either sand-sized particles or sand-sized particles mixed with gravel, crushed gravel, or crushed stone. Do not use materials classified under 301.2.4.3 as crushed concrete, reclaimed asphalt, reprocessed material, and blended material. The contractor may use

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  • Practical Considerations Related to the Use of Alternative

    Aug 09, 2019· Flowable Fill . Backfill can also be done using flowable fill, a cementitious material with a low water-cement ratio that is delivered to the job site by a ready-mix truck. Typically, the utility pipe or other equipment in the trench is first covered with an aggregate material, then the flowable fill is placed in the trench directly from the truck, just like regular concrete.

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  • Pros and Cons of backfilling foundation with gravel

    builder wants to backfill with the existing dirt from the excavation, but I told him to use gravel or crushed stone instead of the high clay content soil to better promote drainage. Are there any drawbacks in going the gravel route. I'm assuming the builder is just taking the cheapeast way out so he doesn't have to pay to haul away the

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  • EXCAVATION AND BACKFILL FOR STRUCTURES

    Do not place backfill against the structure until the concrete has reached the design strength required in Item 421, "Hydraulic Cement Concrete." Backfill retaining walls with material meeting the requirements of Item 423, "Retaining Walls." Backfill around bridge foundations and culverts using material with no particles more than 4 in. in

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  • Which Gravel? Find the Right Gravel for Your Project

    Oct 24, 2017· If you'd like a larger-sized aggregate, you can use 3/8" pea gravel or ¾"-1" gravel. Projects that require general backfill would typically use CM11 ¾" crushed, CM06 natural road gravel, or CM06 crushed road gravel. CONCRETE. Concrete is comprised of water, cement, and aggregate.

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  • 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

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  • How Much Does Crushed Concrete Cost? | HowMuchIsIt.org

    Aug 15, 2018· The 75-40 mm crushed concrete is suitable for use in horse racing showground sub-bases as well as for drainage layers. With recycle concrete, you will often see numbers next to the grades. 57, for example, is approximately 1 inch to 1.5 inches in diameter and is appropriate as a wall backfill.

    Get Price
  • 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

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  • aashto specifications for crushed stone as backfill materials

    Effective with the December 2018 Letting 106 2019 Standard Specifications Section 210 Structure Backfill crushed gravel or crushed stone Do not use than or equal to 6 The contractor may substitute type A for type B material 21022 Gradation (1) Furnish granular backfill material with a gradation conforming to the following

    Get Price
  • 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 process

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  • Pros and Cons of backfilling foundation with gravel

    builder wants to backfill with the existing dirt from the excavation, but I told him to use gravel or crushed stone instead of the high clay content soil to better promote drainage. Are there any drawbacks in going the gravel route. I'm assuming the builder is just taking the cheapeast way out so he doesn't have to pay to haul away the

    Get Price

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