Guidelines for the Use of Synthetic Fluid Dust Control Palliatives on Unpaved Roads

The amount of small soil particles, dust, lost from typical unpaved roads to fugitive dust is staggering. A 1 km stretch of unpaved road can contribute over 2400 kg of dust to the atmosphere (4.2 ton/mile) in a typical 3-month summer season. Road managers typically manage dust from unpaved roads with various dust-control palliatives, which are effective for up to 1 year. Synthetic fluids are a relatively new category of dust-control palliatives. Unlike the more commonly used dust-control palliatives, such as salts, engineering guidelines do not exist for the application and maintenance of synthetic fluids on unpaved roads. To fill this void, we present through this document guidelines for road design and maintenance, palliative selection, application, and care of synthetic fluid-treated roadways.Midwest Industrial Supply United States Department of TransportationReport Documentation Page .............................................................................................. ii Disclaimer ......................................................................................................................... iii List of Figures .................................................................................................................... vi Executive Summary............................................................................................................. 1 CHAPTER 1.0 – Introduction............................................................................................... 4 CHAPTER 2.0 – Background.............................................................................................. 6 Measurements of the Effectiveness of Dust Palliatives .....................................................10 CHAPTER 3.0 – Guidelines .............................................................................................. 16 Road Design and Maintenance...........................................................................................16 Palliative Selection..............................................................................................................20 Application .........................................................................................................................22 Areas Requiring Special Attention......................................................................................26 Maintenance .......................................................................................................................27 CHAPTER 4.0 – Summary................................................................................................. 31 CHAPTER 5.0 – References.............................................................................................. 3

Dust control for Enabler

The dust control group designed a system to restrict dust that is disturbed by the Enabler during its operation from interfering with astronaut or camera visibility. This design also considers the many different wheel positions made possible through the use of artinuation joints that provide the steering and wheel pitching for the Enabler. The system uses a combination of brushes and fenders to restrict the dust when the vehicle is moving in either direction and in a turn. This design also allows for each of maintenance as well as accessibility of the remainder of the vehicle

Laboratory Procedure for Measuring the Effectiveness of Dust Control Palliatives

Creation of fugitive dust on unpaved roads results in the loss of up to 25 mm (one inch) of surface aggregate annually (FHWA, 1998). On these roads, shearing forces created by vehicles dislodge the fine aggregate fraction (silt and clay) that binds the coarse aggregate. Turbulent airflow created by vehicles loft these fine particles in plumes of fugitive dust that impact health, safety, and quality of life. The loss of these particles results in raveling of the road surface, culminating in large annual losses of surface aggregate. Chemical dust control (palliatives) is an attractive option. However, there are currently no accepted field or laboratory performance testing procedures for chemical road dust palliatives. The lack of a method to predict palliative performance forces engineers and road managers into a trial-and-error methodology or reliance on personal judgment and supplier claims to determine what will work best on their unpaved road or runway surfaces. The overall objective of this research was to finalize the development of a laboratory test procedure for evaluating different dust control formulations and application rates required to effectively control the airborne suspension of dust particles in the size range (aerodynamic diameter) of 10 μm or less.Pacific Northwest Transportation Consortiu

Economic Analysis of Manure Harvesting Equipment in Feedyards for Dust Control

This study concentrated on one method of dust control which is harvesting manure with equipment. An economic analysis including hourly fixed and operational costs were performed on the following: tractor-pulled box scraper, front-end loader, dump truck, spreader truck, elevating scraper and tractor-pulled end dump. The purpose of this study was to generate cost data for feedyard owners/operators to reference when making manure management and equipment purchasing decisions.manure harvesting equipment, tractor-pulled box scraper, front-end loader, dump truck, spreader truck, tractor-pulled end dump, Agribusiness, Environmental Economics and Policy,

Durable and ductile double-network material for dust control

Dust generation is a world-wide issue due to its serious deleterious effects on the environment, human health and safety, and the economy. Although various dust suppression methods have been used for decades, some critical drawbacks in state-of-the-art technology still remain unsolved, such as short-lasting, ground water impact, and prone to water. This work reports a soil stabilizer based on non-toxic material and forms a ductile and durable double-network in soil, namely “D3 soil stabilizer”, which not only improves soil mechanical toughness of surface soil but also suppresses dust generation. A copolymer comprising hydrophilic and hydrophobic components combined with enzyme-induced carbonate precipitation is utilized as an in-situ gelation binder to soil particle. The tunable hydrophobic-to-hydrophilic component ratio minimizes undesirable soil matrix expansion and mechanical strength loss upon experiencing wet-dry processes, while still retains good water affinity. We further demonstrated controllable treatment depth by fine-tuning precursor composition, which is essential to minimize environmental impact. The double-network morphology with carbonate precipitate embedded uniformly in polymer matrix is observed via microscopic imaging. The nature of outstanding ductility, high durability against water, and good long-term stability were supported by systematic unconfined compressive strength (UCS) measurements on treated soil, which show strong inter-particles binding, good retention of peak strength, increased strain at peak strength, and increased toughness after soil samples have experienced wet-dry processes

Construction Dust Amelioration Techniques

INE/AUTC 12.0

Min Eng

Tests were conducted to determine properties of four foam agents for their potential use in longwall mining dust control. Foam has been tried in underground mining in the past for dust control and is currently being reconsidered for use in underground coal longwall operations in order to help those operations comply with the Mine Safety and Health Administration's lower coal mine respirable dust standard of 1.5 mg/m|. Foams were generated using two different methods. One method used compressed air and water pressure to generate foam, while the other method used low-pressure air generated by a blower and water pressure using a foam generator developed by the U.S. National Institute for Occupational Safety and Health. Foam property tests, consisting of a foam expansion ratio test and a water drainage test, were conducted to classify foams. Compressed-air-generated foams tended to have low expansion ratios, from 10 to 19, with high water drainage. Blower-air-generated foams had higher foam expansion ratios, from 30 to 60, with lower water drainage. Foams produced within these ranges of expansion ratios are stable and potentially suitable for dust control. The test results eliminated two foam agents for future testing because they had poor expansion ratios. The remaining two foam agents seem to have properties adequate for dust control. These material property tests can be used to classify foams for their potential use in longwall mining dust control.CC999999/Intramural CDC HHS/United States2018-02-05T00:00:00Z29416179PMC5798484vault:2622

Development of a compact excavator mounted dust suppression system

This paper reports on the investigation of an excavator mounted dust suppression system for demolition and construction activities. Ever increasing pressure is placed on contractors to improve their environmental performance, especially dust emissions. Current methods of dust suppression have been investigated and each of the methods has also been critically analysed to determine their advantages and disadvantages. The investigation also examined the requirements of such a system and a concept system proposal was produced. A working prototype has been constructed for a mini excavator complete with a hydraulic breaker. The proposed system was rigorously tested in various configurations to determine its efficiency and effectiveness in comparison with current suppression techniques. The resulting benefits such as the reduction of water usage and cost are highlighted

Coal Mine Safety and Health

[Excerpt] Safety in the coal mining industry is much improved compared to the early decades of the twentieth century, a time when hundreds of miners could lose their lives in a single accident and more than 1,000 fatalities could occur in a single year. Fatal injuries associated with coal mine accidents fell almost continually between 1925 and 2005, when they reached an all-time low of 23. As a result of 12 deaths at West Virginia’s Sago mine and fatalities at other coal mines in 2006, however, the number of fatalities more than doubled to 47. Fatalities declined a year later to 33, which is comparable to levels achieved during the late 1990s. In addition to the well above-average fatal injury rates they face, coal miners suffer from occupationally caused diseases. Prime among them is black lung (coal workers’ pneumoconiosis, CWP), which still claims about 1,000 fatalities annually. Although improved dust control requirements have led to a decrease in the prevalence of CWP, there is recent evidence of advanced cases among miners who began their careers after the stronger standards went into effect in the early 1970s. In addition, disagreement persists over the current respirable dust limits and the degree of compliance with them by mine operators. In the wake of the January 2006 Sago mine accident, the U.S. Department of Labor’s Mine Safety and Health Administration (MSHA) was criticized for its slow pace of rulemaking earlier in the decade. MSHA standard-setting activity quickened starting later that year, however, after enactment in June of the Mine Improvement and New Emergency Response Act (MINER, P.L. 109-236). The MINER act, the first major amendment to federal mine safety law since 1977, emphasized factors thought to have played a role in the Sago disaster (e.g., emergency oxygen supplies, post-accident communication and tracking systems, deployment of rescue teams) and imposed several rulemaking deadlines on MSHA. Accordingly, the agency published final regulations on emergency mine evacuation in December 2006, civil penalties in March 2007, and rescue teams as well as asbestos exposure in February 2008. Some policymakers remain dissatisfied with MSHA’s performance. These sentiments most recently led to House passage, in January 2008, of the Supplemental Mine Improvement and New Emergency Response Act (S-MINER, H.R. 2768). It incorporates language from the Miner Health Enhancement Act (H.R. 2769), such as requiring MSHA to adopt as mandatory exposure limits the voluntary limits (to chemical hazards, for example) recommended by the National Institute for Occupational Safety and Health. S-MINER also requires MSHA to more closely review and monitor operator plans that include retreat mining, the practice used at Utah’s Crandall Canyon mine where six miners and three rescuers lost their lives in 2007. The President has said he will veto S-MINER as passed by the House. In light of rulemaking activity required this year by the MINER act and the Consolidated Appropriations Act, 2008 (P.L. 110-161), MSHA asked the Occupational Safety and Health Administration for assistance. Congress increased MSHA’s appropriation between FY2007 ($302 million) and FY2008 ($334 million). The Administration’s FY2009 budget request for MSHA is $332 million