• Asphalt : Excavation : Concrete : Cranes | Team Elmer's

    Home Office: PO Box 6150 3600 Rennie School Rd. Traverse City, MI 49696-6150 1800.3ELMERS 231.943.3443 231.943.8975 Fax

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  • AcoustiFence-Noise Reducing Fences - Acoustiblok Website

    The Right Material. AcoustiFence-Noise Reducing Fences – AcoustiFence ® AF-6 is a patented, highly effective, yet simple to install, outdoor acoustical barrier. The U.V. and mold resistant qualities of AcoustiFence make it uniquely suited to outdoor use.

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  • eLCOSH : OSHA's Approach to Noise Exposure in Construction

    A dosimeter is like a sound level meter except that it stores sound level measurements and integrates the measurements over time, providing an average noise exposure reading for a given period of time, such as an 8-hour workday. Hearing Protection

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  • 18 TABLE 5-17 TYPICAL NOISE LEVELS OF CONSTRUCTION

    TYPICAL NOISE LEVELS OF CONSTRUCTION EQUIPMENT Equipment Type Typical Sound Level at 50 ft (dBA) Backhoe 80 Bulldozer 85 Compactor 82 Compressor 81 Concrete Mixer 85 Concrete Pump 82 Crane, 88 Crane, Mobile 83 Loader 85 Pavement Breaker 88 Paver 89 Pile Driver, Impact 101 Pump 76 Roller 74 Truck 88 Source: Federal Transit Administration

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  • Construction Methods and Materials for Noise Control

    Construction Methods and Materials for Noise Control (dB). A larger vibration at the source will cause a larger sound pressure level and, thus, a greater perceived volume. The human voice is usually in the range of 55 to 60 dB, a loud truck or motorcycle is 80 to 100 dB, and a jet taking off or a gun firing is measured at 120 dB or more

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  • Noise NavigatorTM Sound Level Database

    Noise NavigatorTM Sound Level Database with Over 1700 Measurement Values E-A-R 88-34/HP Elliott H. Berger, Rick Neitzel1, and Cynthia A. Kladden 3M Personal Safety Division E•A•RCAL Laboratory 7911 Zionsville Road, Indianapolis, IN 46268-1650

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  • Crushed Concrete Aggregates - Properties and Uses of

    Crushed concrete aggregates also called as recycled concrete aggregates are fragments and pieces of concrete buildings which are demolished or rebuild. These crushed concrete are cleaned from dirt and broken to smaller pieces to manufacture aggregate which is termed as recycled aggregate. noise barriers and embankments; 2. Uses of Processed

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  • Concrete chokes our landfill sites – but where else can it

    Feb 26, 2019· In Brazil, one of the biggest emerging economies, recycling is close to non-existent: less than 1% of Brazil's concrete waste is recycled, according to the Brazilian Association for the

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  • Sound-absorbing concrete block - Concrete Construction

    Sound-absorbing concrete block Acoustically engineered block quiet noisy areas and improve overall sound quality By John A. Koski Noise reduction coefficients (NRCs) for various building materials Material Surface Texture Approximate or Finish NRC concrete floor all .02 glass all .02 wood floor all .03 plaster smooth .04 plaster rough .05 brick

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  • Noise Levels for Common Equipment - University of Florida

    The Noise Reduction Rating (NRR) needed for each piece of equipment is given. For equipment not listed, please contact EH&S at 392-1591 for an evaluation. Noise Source Sound Level NRR Needed Time Allowed Airboat 108 dBA 30 2 minutes Band Saw 104 dBA 26 6 minutes Blender 91 dBA 13 2 hours Blower 99 dBA 21 19 minutes Concrete Saw 112 dBA 34 1 minute

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  • Recycled Concrete Aggregate - an overview | ScienceDirect

    Recycled concrete aggregate (RCA) is the designation used in BS 8500-2 for recycled aggregate principally comprising crushed concrete. Designations of recycled aggregate other than RCA are of lower quality and may contain significant quantities of masonry which would preclude or limit their use in structural concrete.

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  • Acoustics - Engineering ToolBox

    EPA has defined an A-weighted sound level day and night equivalent for a 24 hour period. L eq - Equivalent Sound Level . Equivalent Sound Level - L eq - quantifies the noise environment to a single value of sound level for any desired duration. L s - Sound Exposure Level . Sound Exposure Level - L s - describes the noise from a variable source

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  • Controlling Noise on Construction Sites - LHSFNA

    Controlling Noise on Construction Sites Concrete Pumps 3 Pavers 3 *SAE, Noise Abatement techniques for Construction Equipment, Cambridge 1979. Sound level tests on different saw blades under comparable conditions reported sound levels at the operator position between 91 and 97 dB (A).

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  • EPA Identifies Noise Levels Affecting Health and Welfare

    Sep 14, 2016· The document identifies a 24-hour exposure level of 70 decibels as the level of environmental noise which will prevent any measurable hearing loss over a lifetime. Likewise, levels of 55 decibels outdoors and 45 decibels indoors are identified

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  • 7.0 Mitigation of Construction Noise - Handbook

    Pile Driving: Pile driving may produce noise levels in excess of acceptable limits, even when feasible noise reduction methods are used.Various dampening and shielding methods discussed later can attain some reduction. However, such methods rarely reduce the noise level to an acceptable level for the sensitive receptors close to the site.

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  • AcoustiFence-Noise Reducing Fences - Acoustiblok Website

    The Right Material. AcoustiFence-Noise Reducing Fences – AcoustiFence ® AF-6 is a patented, highly effective, yet simple to install, outdoor acoustical barrier. The U.V. and mold resistant qualities of AcoustiFence make it uniquely suited to outdoor use.

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  • Outdoor Ambient Sound Levels - Engineering ToolBox

    Outdoor Ambient Sound Levels Outdoor ambient sound level (dBA) in rural and urban business and industrial environments with or without limited traffic . Sponsored Links . In residential areas most noise comes from transportation, construction, industrial, and human and animal sources. Road traffic noise is the major source of noise.

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  • Re-Crete Hawaii, LLC.

    Concrete Delivery and Recycling in Kailua. Concrete Delivery and Recycling in Kailua. Home; To get a sense of noise level and job procedure. Concrete mixer is transported on tail hitch to job site. By moving the concrete with the skid steer, you save on pumping costs.

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  • What to do with "concrete waste" at any type of concrete

    This is really your most environmentally sound practice for excess concrete materials, and also one of the more financially lucrative options. Recycle excess concrete materials. There are ample opportunities now to recycle. Plastic concrete can be put through a concrete reclaimer to make aggregate suitable for further concrete production.

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  • 5 Ways to Recycle Old Concrete | Apartment Therapy

    Aug 03, 2011· Earlier this summer, I wrote about different ways we could remove and repurpose some of the concrete around our home. Since then, we spent one full weekend jack-hammering part of our driveway and random paths around the house. The only problem – we now realize that we have way more concrete rubble than we could possible reuse!Concrete is inherently difficult to dispose of

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  • On The Level Concrete Raising Inc - Home

    On The Level Concrete Raising Inc is your concrete contractor specializing in residential and commercial construction. Dealing and specializing in ( concrete raising, mudjacking ). On The Level Concrete Raising Inc takes pride in meeting and exceeding the needs of our clients, making sure the project is completed on time, and that our customers are truly satisfied with the results.

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  • Reducing Railway Noise with Porous Sound-Absorbing

    The effect of porous sound-absorbing concrete slabs on railway noise reduction is examined in this paper. First, the acoustical absorption coefficients of porous concrete materials with various aggregate types, gradations, fibre contents, and compaction indexes are measured in the laboratory. The laboratory results show that porous concrete that uses a composite of expanded perlite and slag as

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  • Pavement Manual: Diamond Grinding

    The level surface is achieved by running the blade assembly at a predetermined level across the pavement surface, which produces saw-cut grooves. The uncut concrete between each saw-cut breaks off, more or less, at a constant level above the saw-cut grooves, leaving a level surface with longitudinal texture as shown in Figure 10-28.

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  • Concrete Crusher Sound Level - vollendam.nl

    Concrete Crusher Noise Level. Concrete Crusher Noise Level. A wide variety of noise sources may exist in the workplace the niosh sound level meter app is a tool to measure sound levels in the workplace and provide noise exposure parameters to help reduce occupational noise-induced hearing loss. READ MORE

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