Experiment Study on Formula and Field of the Dust Suppressant for the Open Mine Road

2010 ◽  
Vol 152-153 ◽  
pp. 1847-1855
Author(s):  
Cui Feng Du ◽  
Jian Hua Du ◽  
Hong Shuang Li
Keyword(s):  
Moisture Content ◽  
Field Experiments ◽  
Orthogonal Experiment ◽  
Road Dust ◽  
Dust Sample ◽  
Experiment Study ◽  
The Road ◽  
On The Road ◽  
The Moment ◽  
Optimal Formula

Formula and field experiments of road dust suppressant were conducted. The optimal formula of dust suppressant was developed through orthogonal experiment .The moisture content in dust sample sprayed with the dust suppressant was 13.4% after it was left untouched indoor for 21 days. Field experiment was conducted in a big open mine during spring. On the road sprayed with the dust suppressant , the moment dust raising concentration behind the driving truck on the tenth day was 4.9mg/m3 ，lower than post dust concentration required in the national health standard, this shows that the dust suppressant is effective to control road dust raising for 10 days .

scholarly journals CONCEPT OF PROTECTED NETWORKS CREATION

2020 ◽  
pp. 87-94
Author(s):  
Aigul Ospanovna Dauitbayeva ◽  
Elmira Nurlanovna Tulegenova ◽  
Sapar Omir ◽  
Mukhtar Kozhan
Keyword(s):  
Remote Access ◽  
The Road ◽  
Corporate Information System ◽  
On The Road ◽  
The Moment ◽  
Fixed Line ◽  
Voice Data ◽  
The Voice ◽  
Corporate Information ◽  
High Place

Nowadays, it is important for users to know how to contact a corporate information system. There is a need for broadband connection, whether it’s fixed line or Wi-Fi, as it’s not rare for users to work on the road. At the moment, virtual technologies are widely popular, they have a high place in modern companies. Because they allow the voice server to communicate to one workplace. It does not require staff always to keep up-to-date with the Service, and there’s no need to be there, so use remote access. Many institutions have been fixed or fixed through a mobile connection that ensures optimal connection of mobile workers through the terminal. They work with voice data transmission services. It ensures that employees are always in touch.

The Sense of an Ending: Music, Time and Romance in Before Sunrise

2018 ◽  
pp. 167-182
Author(s):  
Carlo Cenciarelli
Keyword(s):  
Central Europe ◽  
The Road ◽  
Cinematic Experience ◽  
On The Road ◽  
The Moment

Right from the start, Before Sunrise presents us with the problem of its ending. The film narrates the on-the-road romance of Jesse and Celine, who meet on a train through central Europe, fall for each other, and decide to spend a day and night together in Vienna before continuing their respective journeys, never to see each other again. In a move that is typical of indie cinema, the two protagonists trade the idea of a ‘happily ever after’ with the possibility of experiencing a moment together. And yet, for this same reason, their time together is inseparable from the feeling of the approaching goodbye, which threatens their very ability to experience the moment. My chapter explores how Before Sunrise draws on music to find a solution to this conundrum. I show that, as we approach the temporal deadline of the title, Bach’s music is used to mobilise a set of complementary eschatological frameworks that are meant both to freeze and extend the time in Vienna. More broadly, I suggest that the film provides a model of cinema’s use of music to make sense of endings and of the time-bound nature of the cinematic experience.

The Integrative Time-Dependent Modeling of the Reliability and Failure of the Causes of Drivers' Error Leading to Road Accidents

2015 ◽  
pp. 1279-1294
Author(s):  
Khashayar Hojjati-Emami ◽  
Balbir S. Dhillon ◽  
Kouroush Jenab
Keyword(s):  
Human Error ◽  
Time Dependent ◽  
Failure Rates ◽  
Road Accidents ◽  
Road Transportation ◽  
The Road ◽  
Representational Model ◽  
On The Road ◽  
The Moment ◽  
Dependent Failure

Nowadays, the human error is usually identified as the conclusive cause of investigations in road accidents. The human although is the person in control of vehicle until the moment of crash but it has to be understood that the human is under continued impact by various factors including road environment, vehicle and human's state, abilities and conduct. The current advances in design of vehicle and roads have been intended to provide drivers with extra comfort with less physical and mental efforts, whereas the fatigue imposed on driver is just being transformed from over-load fatigue to under-load fatigue and boredom. A representational model to illustrate the relationships between design and condition of vehicle and road as well as driver's condition and state on fatigue and the human error leading to accidents has been developed. Thereafter, the stochastic mathematical models based on time-dependent failure rates were developed to make prediction on the road transportation reliability and failure probabilities due to each cause (vehicle, road environment, human due to fatigue, and human due to non fatigue factors). Furthermore, the supportive assessment methodology and models to assess and predict the failure rates of driver due to each category of causes were developed and proposed.

The Integrative Time-Dependent Modeling of the Reliability and Failure of the Causes of Drivers’ Error Leading to Road Accidents

2013 ◽  
Vol 4 (1) ◽  
pp. 25-39 ◽  
Author(s):  
Khashayar Hojjati-Emami ◽  
Balbir S. Dhillon ◽  
Kouroush Jenab
Keyword(s):  
Human Error ◽  
Time Dependent ◽  
Failure Rates ◽  
Road Accidents ◽  
Road Transportation ◽  
The Road ◽  
Representational Model ◽  
On The Road ◽  
The Moment ◽  
Dependent Failure

Nowadays, the human error is usually identified as the conclusive cause of investigations in road accidents. The human although is the person in control of vehicle until the moment of crash but it has to be understood that the human is under continued impact by various factors including road environment, vehicle and human’s state, abilities and conduct. The current advances in design of vehicle and roads have been intended to provide drivers with extra comfort with less physical and mental efforts, whereas the fatigue imposed on driver is just being transformed from over-load fatigue to under-load fatigue and boredom. A representational model to illustrate the relationships between design and condition of vehicle and road as well as driver’s condition and state on fatigue and the human error leading to accidents has been developed. Thereafter, the stochastic mathematical models based on time-dependent failure rates were developed to make prediction on the road transportation reliability and failure probabilities due to each cause (vehicle, road environment, human due to fatigue, and human due to non fatigue factors). Furthermore, the supportive assessment methodology and models to assess and predict the failure rates of driver due to each category of causes were developed and proposed.

Study on the Physicochemical Characteristics and Dust Suppression Performance of New Type Chemical Dust Suppressant for Copper Mine Pavement

2021 ◽  
Author(s):  
Zhian Huang ◽  
Yang Huang ◽  
Zhijun Yang ◽  
Jun Zhang ◽  
Yinghua Zhang ◽  
...  
Keyword(s):  
Road Dust ◽  
Physicochemical Characteristics ◽  
National Standard ◽  
Open Pit ◽  
Dust Suppression ◽  
Suppression Effect ◽  
The Road ◽  
New Type ◽  
On The Road ◽  
Physical And Chemical

Abstract Mine road dust is an important source of dust in mine operations. The dust produced on the road surface is a great hazard to the workers. Aiming at the road dust of an open-pit mine, this paper conducts physical and chemical analysis of a dust suppressant prepared by using sodium polyacrylate as a binder, sodium carbonate as a moisture absorbent, polyethylene glycol as a water-retaining agent, and alkyl glycoside as a surfactant. Characterization of characteristics and dust suppression performance. The results show that the dust suppressant has a pH of 11.03, a viscosity of 18.5 mPa·s, and a surface tension of 28.1 mN/m. The content of heavy metal ions contained is less than the maximum concentration defined by the national standard. Under the same temperature condition, the greater the humidity, the stronger the hygroscopicity, especially when the humidity is 30%, where the better hygroscopic effect than water is obvious. The dust suppressant also has good anti-evaporation properties and it keeps at 4–5% moisture content after 10 days at a normal temperature. Compared with water, the dust suppressant has better resistance to wind erosion and compression. Under the same conditions, the loss rate of water is 2 times that of the dust suppressant and the pressure of the dust suppressant sample is about 3 times that of water. The dust suppressant has a much higher dust removal efficiency for all dust and respirable dust than water under the same conditions. Finally, the test results and mechanism of the dust suppression effect of the dust suppressant are described and analyzed, which shows that the dust suppressant studied in this paper has good performance and is suitable for road dust prevention.

scholarly journals Real-time predication and navigation on traffic congestion model with equilibrium Markov chain

2018 ◽  
Vol 14 (4) ◽  
pp. 155014771876978 ◽  
Author(s):  
Yan Zheng ◽  
Yanran Li ◽  
Chung-Ming Own ◽  
Zhaopeng Meng ◽  
Mengya Gao
Keyword(s):  
Markov Chain ◽  
Real Time ◽  
Traffic Congestion ◽  
Field Experiments ◽  
Road Traffic ◽  
Markov Chain Model ◽  
Chain Model ◽  
The Road ◽  
Shortest Path Algorithms ◽  
On The Road

With the explosive growth of vehicles on the road, traffic congestion has become an inevitable problem when applying guidance algorithms to transportation networks in a busy and crowded city. In our study, the authors proposed an advanced prediction and navigation models on a dynamic traffic network. In contrast to the traditional shortest path algorithms, focused on the static network, the first part of our guiding method considered the potential traffic jams and was developed to provide the optimal driving advice for the distinct periods of a day. Accordingly, by dividing the real-time Global Positioning System data of taxis in Shenzhen city into 50 regions, the equilibrium Markov chain model was designed for dispatching vehicles and applied to ease the city congestion. With the reveals of our field experiments, the traffic congestion of city traffic networks can be alleviated effectively and efficiently, the system performance also can be retained.

Quantitative Measurement of Tire Flatspotting

1967 ◽  
Vol 40 (4) ◽  
pp. 1147-1155 ◽  
Author(s):  
J. L. Brownlee ◽  
Eli Perry
Keyword(s):  
Moisture Content ◽  
Ambient Temperature ◽  
Quantitative Measurement ◽  
Large Reduction ◽  
Processing Conditions ◽  
Tire Cord ◽  
Nylon 66 ◽  
Ambient Temperatures ◽  
The Road ◽  
On The Road

Abstract Equipment was developed to measure the flatspotting of tires quantitatively on an indoor wheel. It provides close control over all of the important variables and has the virtue of simulating driving conditions for all seasons of the year. Good correlations between quantitative values from the indoor wheel and subjective jury tests on the road are obtained when wheel speeds are adjusted to give the same maximum tire temperature as in the road test for a given ambient temperature. The tire cord was of primary importance in controlling the depth of flatspot. Other variables exerted their influence via their effect on cord properties. For nylon 66 cord, flatspot depth was decreased by high ambient temperatures, high tire air pressure, low loads, and moderate run-in conditions. Change in the moisture content of the nylon cord improved or worsened flatspot depending on the ambient temperature of test. Factors such as cord processing conditions, cord twist, tire bias angle, number of plies, building drum width, postinflation conditions, and temperature of cure had minor effects on the flatspot. A nylon 66 copolymer (Monsanto 88N) showed a large reduction in tire flatspotting.

scholarly journals Investigation of Flexible Pavement Failure along Ede – Akoda Road, Osun State, Southwestern Nigeria

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
M.A Tijani ◽  
S.O.A Olawale
Keyword(s):  
Moisture Content ◽  
Flexible Pavement ◽  
Liquid Limit ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Southwestern Nigeria ◽  
The Road ◽  
Reconnaissance Survey ◽  
Cause Of Failure ◽  
On The Road

Ede to Akoda is a trunk B-road built over 30 years ago. It has been in despicable condition leading to fatal accidents and loss of life and properties that impacted negatively on the community. This study investigated the flexible pavement failure along the road in order to ascertain the possible causes of its failure. The methodology adopted covered reconnaissance survey, assessment of the physical condition of the road and soil investigation of subgrade. The result of reconnaissance survey revealed that the surface wearing course has degraded extensively. The physical inspections showed that considerable segment of the drainage facilities has collapsed or totally blocked allowing extensive ponding of rain water on the road surface. The pot holes were deep and widespread in most places and the road is near total collapse. The result of soil investigation revealed that natural moisture content, specific gravity, liquid limit, plastic limit, plastic index, maximum dry density and optimum moisture content were within the specifications of the Federal Ministry of Works and Housing limits (FMWH). However, the California bearing ratio values were less than minimum 10% stated in the specifications, this suggests the nature of subgrade soil as a possible cause of failure of road pavements along Ede-Akoda Road, Nigeria. It is recommended that further research be conducted on other structures of the flexible pavement to better ascertain the causes of the studied road failure.

scholarly journals Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Biao Zeng ◽  
Lin-feng Wang ◽  
Yun Tian ◽  
Tao-rui Zeng ◽  
Bing Li
Keyword(s):  
Moisture Content ◽  
Vibration Frequency ◽  
Dry Density ◽  
Engineering Practice ◽  
Maximum Dry Density ◽  
Red Clay ◽  
The Road ◽  
On The Road ◽  
Vibration Time ◽  
Vibration Parameters

Red clay cannot be used as embankment filler directly due to its water-sensitive property. Gravel is usually added into red clay to enhance its performance in engineering practice. In order to investigate the influence of mixtures of red clay and gravel on the road performance, gravitational compaction experiment of red clay and vibratory compaction experiment of mixtures of red clay and gravel were conducted, respectively. The results indicate that compaction curves of red clay have double peak; the second peak is the real maximum dry density, and its corresponding moisture content is the optimal moisture content. The dry density of mixtures of red clay and gravel is influenced by the content of gravel, vibration frequency, and vibration time. The optimal content of gravel is 30%, the best vibration frequency is 45 Hz, and the optimal vibration time is 5 minutes for the mixtures of red clay and gravel in this study. The effectiveness of optimal content of gravel and optimum vibration parameters was confirmed by a CBR test. According to the compaction experiment results and actual situation in the field, a suitable construction method of subgrade using the mixtures of red clay and gravel was put forward. The feasibility of this method was also confirmed by postconstruction deformation data of the field test embankment.

Assessment of the Potential for Salt Damage to Asphalt Surfacings when Chloride-Treated Unpaved Roads Are Upgraded to a Sealed Standard

2019 ◽  
Vol 2673 (12) ◽  
pp. 774-782
Author(s):  
David Jones
Keyword(s):  
Calcium Chloride ◽  
Field Experiments ◽  
Dust Control ◽  
Test Method ◽  
Salt Crystallization ◽  
Case Scenario ◽  
Worst Case ◽  
Salt Damage ◽  
The Road ◽  
On The Road

Experience gained during research into chemical dust control/fines preservation has indicated that the reduced maintenance on, and reduced gravel loss from, treated roads justifies the use of these chemical treatments as a cost-effective road maintenance and management strategy. Treatments also serve as a means of preserving layer thickness and integrity in stage construction if upgrading the road to a paved standard is planned. However, the potential for damage to primed bases and bituminous surfacings placed on chloride-treated layers as a result of salt crystallization underneath the surface during hot, dry conditions in arid and semi-arid climates has to be considered. A laboratory test method was therefore developed to gauge the potential for this type of damage. Calcium chloride, a commonly used dust palliative, was used in the experiment. The test, which simulated a worst-case scenario, followed by two field experiments that were evaluated for 36 months, indicated that salt damage to base materials, whether primed or unprimed, and to bituminous surface treatments or thin asphalt concrete layers is unlikely to occur on roads previously treated with calcium chloride. Care should be taken in the choice of surfacing if the electrical conductivity of the top 25 mm of treated material on the road exceeds 0.15 S/m prior to priming the base and placing the surfacing. This limit can be relaxed if laboratory testing, as described in this paper, indicates that salt damage is unlikely.

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