evaluation of noise exposures at a precast concrete

specializing in the production of large, medium and small concrete mixers, concrete mixing stations, stabilized soil mixing stations and other equipment. It is a heavy industry enterprise integrating R & production and sales.

HHE Report No. HETA-2015-0133-3339, Evaluation of Noise ...

NIOSH [2019]. Evaluation of noise exposures at a precast concrete manufacturer. By Li JF, Brueck SE. Cincinnati, OH: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Health Hazard Evaluation Report 2015-0133-3339,

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Evaluation of noise exposures at a precast concrete ...

Mar 01, 2019  "The Health Hazard Evaluation (HHE) Program received a request from a precast concrete manufacturer to measure employee noise exposures and noise levels in the production areas, and to identify possible noise control options. The company manufactured precast concrete highway barriers, manholes, and other products using drycast and wetcast ...

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NIOSH Finds Overexposures to Noise at a Precast Concrete ...

A NIOSH investigation of a precast concrete manufacturing plant found noise overexposures among workers in all the job titles that were monitored. The facility used both drycast and wetcast processes to manufacture precast concrete highway barriers, manholes, and other products. NIOSH’s evaluation of the plant focused mainly on assessing ...

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Noise Exposure and Hearing Exposure - Precast

May 28, 2010  National Precast Concrete Association / Precast Magazines / Archive - 2004-2008 / Noise Exposure and Hearing Exposure May 28, 2010 1 Comment There are three ways to nip the noise issues in the bud at your plant.

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Sound Impact Properties of Precast Concrete

noise from hard surfaced floors (e.g. tiled concrete) is to provide a floating floor. A floating floor is a load-bearing slab that is supported by a structural floor, but is isolated from it by resilient and sound absorbing support materials such as rubber (see Figure 9.17 from Precast Concrete Handbook Ch.9). The

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ITEM 607.99100106 - PRECAST CONCRETE NOISE BARRIER

The precast concrete noise barrier shall meet the material requirements of '704-03, Precast Concrete - General with the following modifications and additions: Precast Concrete: The concrete for precast panels, caps, and posts shall have a minimum compressive strength of 35 MPa at 28 days after casting.

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Evaluation of alternatives to sound barrier walls.

Jun 01, 2013  Four different types of noise barriers, including one conventional precast concrete wall and three LOS walls were installed in the study areas for field investigation. Evaluation was made on the issues relating to the construction, cost and structures of the installed noise

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ITEM 607.99100106 - PRECAST CONCRETE NOISE BARRIER

The precast concrete noise barrier shall meet the material requirements of '704-03, Precast Concrete - General with the following modifications and additions: Precast Concrete: The concrete for precast panels, caps, and posts shall have a minimum compressive strength of 35 MPa at 28 days after casting.

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Concrete Soundwall and Noise Reduction

According to National Precast Concrete Association, “concrete’s greater mass reduces sound penetrating through a wall by more than 80% compared with wood or steel frame construction”. precast concrete sound barriers will provide you the peace and quiet that you’ve been looking for. *Wall up and say good bye to those traffic noises.

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(PDF) Noise Assessment at Construction Site which Uses IBS ...

The second phase involved assessing the noise exposure for affected activities using Sound Level Meter (SLM). ... (2019) was on a precast concrete system. Both studies had shown different noise ...

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HEALTH AND SAFETY IN CONCRETE CASTING PROCESSES

Noise In addition to the concrete pump noise, when a concrete vibrator comes into ... designed as a standardised and practical assessment tool for the evaluation of ergonomic conditions in the workplace. PLIBEL is a method for the identification of ... used to measure hand and arm vibration exposure among concrete workers at work sites, Figure 2 a.

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Evaluation of Fire Damage to a Precast Concrete Structure ...

Feb 01, 2005  This article discusses the use of nondestructive and laboratory testing techniques and load testing in evaluation of fire damage to precast prestressed concrete members in a parking structure. The in situ evaluation phase consisted of nondestructive testing of concrete using ultrasonic pulse velocity and radiographic exposures to locate tendons ...

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Benefits of using precast - National Precast Concrete ...

Precast concrete does not emit toxic fumes under fire and can limit smoke spreading in buildings. Environmentally considerate buildings: Precast concrete is an inert substance which does not emit or give off gases or compounds. This is a huge relief to allergy sufferers. Precast does not attract mould or mildew. Precast concrete absorbs CO2.

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NOISE REDUCTION SYSTEMS MATERIAL SPECIFICATION

Precast concrete panels must conform to Section 805 and 901 of the 2006 Standard Specifications and shall be subject to not less than 50 cycles of freeze/thaw exposure according to ASTM C666 and C215. The samples shall have a minimum average retained strength of 85 percent after the freeze /thaw exposure.

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RESEARCH AND DESIGN FOR A PRECAST CONCRETE HIGH

precast concrete techniques in Taiwan. Precast concrete is defined as concrete which is cast in some place other than the final construction position; it is generally produced in a permanent precasting plant or temporary one on the construction site if the project is large enough. In comparison to traditional concrete construction, the advantages

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7 Cost-Benefit Analysis for Noise Control Technology for ...

Barriers are constructed from a variety of materials, including wood, concrete block, precast concrete, brick, and other materials. Earth berms may also be used as noise barriers. Construction of barriers is a cooperative effort between FHWA and the state in which the barrier is constructed, in determination of both the requirements and the costs.

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Concrete and Concrete Products - Standards Occupational ...

Steel erection concrete testing requirements and number of samples required to be taken. (November 19, 2002). Questions and answers regarding the respiratory protection standard. (October 16, 1998). Medical evaluation requirements under the respiratory protection standard. (October 05, 1998). Respiratory Protection Tables. (December 18, 1989).

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hearing Archives - National Precast Concrete Association

May 28, 2010  There are three ways to nip the noise issues in the bud at your plant. Filed Under: Archive - 2004-2008 Tagged With: hearing , noise exposure , precast , precast concrete ,

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Development of Wood Highway Sound Barriers

barriers are constructed using earth, precast concrete, concrete block, brick, wood, metal, and combinations of these materials at a total cost of over 875 million (in 1992 dollars) (FHWA, 1994). Most of these barriers are constructed of concrete masonry and concrete, followed by earth berms and wood. Approximately 17

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Evaluation of Keyway Grout Test Methods for Precast ...

Fig. 2. Typical precast concrete box beam bridge deck section with asphaltic or concrete wear course after significant traffic exposure. prestressed concrete box beam con­ struction. Sometimes, the grout in the keyway allows leakage that is discov­ ered during inspection of the under­ side of the precast concrete elements.

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Precast concrete barrier crash testing : final report.

Furthermore, FHWA acknowledged both barriers as having the best performance of any free-standing precast concrete barriers to date. The research report also discusses the performance of the Tall F-shape barrier in a Test Level 4 crash test, involving an 8,000 kg single-unit truck.

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HEALTH AND SAFETY IN CONCRETE CASTING PROCESSES

Noise In addition to the concrete pump noise, when a concrete vibrator comes into ... designed as a standardised and practical assessment tool for the evaluation of ergonomic conditions in the workplace. PLIBEL is a method for the identification of ... used to measure hand and arm vibration exposure among concrete workers at work sites, Figure 2 a.

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Concrete Masonry Provides Solution for Sound Wall - NCMA

Feb 05, 2019  You often see noise barriers or sound barriers (as referenced in other parts of the country) that line busy roadways constructed from precast concrete panels or tilt-up concrete walls. However, the Washington State Department of Transportation (WSDOT) required something completely different for this stretch of Route 167 in the corridor between ...

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Fire Damage evaluation anD repair oF precast concrete garage

8 ConCrete repair Bulletin september/october 2009 icri Fire Damage evaluation anD repair oF precast concrete garage By Alfredo e. BustAmAnte And michAel w. lee Vehicular fires in parking garages are not an infrequent event. Research by the authors indicates that on average, one fire occurs each day in a parking garage somewhere in the U.S.

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Noise Barrier, Sound Absorptive Precast Concrete Noise Barrier

The precast noise barrier panels are composite and bonds a layer of sound absorptive concrete to a layer of normal weight structural concrete. The sound absorbing concrete shall use inorganic raw materials that improves the noise wall panels sound absorption and durability characteristics.

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Effect of environmental conditions on field welding of ...

conditions on the quality of field-welded precast concrete connections. A research study was conducted to investigate the quality of welded connections between precast concrete components made under environmental conditions typically encountered in precast concrete construction. The effects of wind, humidity, temperature, and surface mois-

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Evaluation of Keyway Grout Test Methods for Precast ...

Fig. 2. Typical precast concrete box beam bridge deck section with asphaltic or concrete wear course after significant traffic exposure. prestressed concrete box beam con­ struction. Sometimes, the grout in the keyway allows leakage that is discov­ ered during inspection of the under­ side of the precast concrete elements.

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Evaluation of Concrete Traffic Barrier with Acoustic ...

Task Order BS Final Report: MASH Test 3-11 on the Washington Concrete Traffic Barrier with Acoustic Coating TTI Research Supervisor: Roger P. Bligh, P.E., Ph.D. Research Engineer Texas AM Transportation Institute TAMU 3135 College Station, Texas 77843-3135 (979) 845-4377 [email protected] Pooled Fund Technical Representative: Dave Edwards SR 520 Bridge

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Advantages and Limitations of Precast Concrete ...

concrete volume used in public housing projects (Chiang et al., 2006). The major precast elements used are precast facades, staircases, parapets, partition walls (dry wall), and semi-precast slabs. Pilot projects currently under construction, extend the use of precasting to 65% with bathroom and

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Post Installation Evaluation and Repair of ... - Concrete Pipe

concrete pipe industry, but taxpayers as well”. This quote from Professor M.G. Spangler, a well respected authority and early pioneer in the design of concrete pipe, should be taken into consideration when in-specting a project using reinforced concrete pipe.

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Betonwerk und Fertigteil-Technik/Concrete Precasting Plant ...

Design and Construction of Precast Concrete Structures According to German DIN 1045-1. The draft of the new E DIN 1045-1 (2.97) was presented in 1998 by Zilch and Mainz in Beton+Fertigteil ...

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CONCRETE MASONRY HIGHWAY SOUND BARRIERS - NCMA

Concrete masonry construction successfully fills all of the requirements for effective sound barrier walls, providing excellent noise insulation and a wide choice of aesthetic styles, excellent stability, strength, durability, and low maintenance. These benefits are well recognized; concrete masonry sound barriers represent over five times the ...

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23 CFR § 772.13 - Analysis of noise abatement. CFR US ...

Final design of design-build noise abatement measures shall be based on the preliminary noise abatement design developed in the technical noise analysis. Noise abatement measures shall be considered, developed, and constructed in accordance with this standard and in conformance with the provisions of 40 CFR 1506.5(c) and 23 CFR 636.109.

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Noise-reduction Natural Art Concrete Fence

"Elevated workplace or environmental noise can cause hearing impairment, hypertension, ischemic heart disease, annoyance, and sleep disturbance.Changes in the immune system and birth defects have been also attributed to noise exposure" ~ National Institute of Environmental Health Science “Concrete’s greater mass reduces sound penetrating through a wall by more than 80% compared with wood ...

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