NO TOPIC OBJECTIVES METHODOLOGY FINDINGS/CONCLUSION
1 Use of Steel Aggregates in Pavements (WSDOT,2015) 1. Properties of steel slag aggregates (SSA)
2. Use of SSA in bituminous and cement concrete applications
3. Advantages and disadvantages of the SSA usage
4. Acceptance of SSA No methodology stated in the journal Extensive testing should be conducted to determine the expansive nature of the material and its long-term strength under repeated loads and moisture.
1. High pH of some SSA might cause corrosion problems whereby may danger the aquatic life.
2. Without adequate testing the use of SSA, it is not recommended to be used as aggregate base.
2 Reclaimed Asphalt Pavement (RAP) with Steel Slag Aggregate (SSA)
(Sheila A., 2013) 1. Determine
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UNI EN 13043 test
7. Marshall test
8. Indirect tensile strength test 1. The fragmentation and wear resistance acceptable results (22-23% and 6.5-9.5%)
2. Accelerated polishing coefficient (0.44 and 0.47)
3. Water absorption (1.5-2.2%)
4. The bituminous mixture containing steel slag showed mechanical characteristics similar or more satisfactory than the mixtures obtained using natural aggregates
5. The release of pollutants measured in leaching tests resulted acceptable except for chromium and vanadium
9 Utilization Of Gneiss Coarse Aggregate And Steel Slag Fine Aggregate In Asphalt Mixture
(2015) To explore the feasibility of simultaneously using gneiss coarse aggregate and steel slag fine aggregate in asphalt mixture. 1. D8 Advanced X-ray diffraction and Axios X-ray fluorescence for material characteristics
2. Volume control method
3. Marshall test
4. Crack resistance and moisture susceptibility test
5. Asphalt mixture expansion test
High-temperature deformation resistance test 1. Modified Weathered Steel Slag Fine Aggregate (WSFA) produced by newly proposed method
2. After 12 months undergo weathering treatment, asphalt mixture prepared with original WSFA showed higher asphalt content and lower volume stability compare to modified WSFA
Doing so would cause the asphalt to harden and therefore make it unusable. “Because asphalt cannot be stored, it is not susceptible to being inventoried” (Justia, 2000).
The Massachusetts Department of Environmental Quality Engineering took ground water samples that showed volatile organic chemicals (VOCs) in the supply well. This well was formerly used for drinking water for the community. The results indicated that the ground water beneath the property was contaminated with radioactive material and VOCs. A sphagnum bog on the grounds had evidence of radioactive contamination. The soil, sediment, surface water, and ground water on the site had high levels of depleted uranium. On some of the soil and sediments, Poly Chlorinated Bi-phenyls were recorded. The buildings and structures on the grounds were as well contaminated with depleted uranium and other hazardous substances.
such as clay, shale, or blast-furnace slag. Either a dry or a wet process is
Steeped in history and surrounded by a diverse range of natural beauty, Somerset is a popular destination for tourists. Given the importance of tourism to the local economy, city officials, homeowners and businesses rely on asphalt pavement to help make a good first impression on visitors and keep them coming back. Somerset residents know that asphalt pavement is fast to install and maintain, provides an extremely smooth ride, is long-lasting, looks great and is very cost-effective. Whether they need asphalt paving, crack repair, sealcoating, asphalt curbing, parking lot striping, asphalt milling, bumper blocks or any other asphalt-related service, they also know that they can count on APM for extraordinary results at affordable prices.
Mining not only has an impact on the environment, but also on the inhabitants. Mining in the Canadian Shield mining is one of the main sources of human and economic activities, but in the process, can cause great harm as well . Some of the effects of open pit mining are topographic modifications, soil changes, surface water quality changes, groundwater quality changes, air quality changes, chemical residues, land Subsidence, cultural factors, including: aesthetic, noise, and visual effects, flora and fauna alterations, land use modifications and economic costs. The problems associated with in situ mining are many. The leaching liquid used for in-situ leaching may contain the leaching agent ammonium carbonate or sulfuric acid. The advantages of this technology are the reduced hazards for the employees from accidents, dust, and radiation, the low cost and no need for large uranium mill tailings deposits. The disadvantages of the in situ leaching technology are the risk of spreading of leaching liquid outside of the uranium deposit, involving subsequent groundwater contamination, the unpredictable impact of the leaching liquid on the rock of the deposit and the impossibility of restoring natural groundwater conditions after completion of the leaching operations. Moreover, in-situ leaching releases considerable amounts of radon, and produces certain amounts of waste slurries and waste water during recovery of the uranium
...als in addition it is very salty. Therefore, this can be very harmful for drinking water sources and to the environment as well if it was not properly controlled by officials (USGS).
On 6th July 1988 a relief tanker driver accidently released twenty tonnes of aluminum sulfate into the mains supply in Lowermoor Water Treatment Works subsequently contaminating the water, which supplies to a large area of north Cornwall. Approximately 20, 000 individuals were exposed to this contaminated water (Phyllis, 2008).
The most economical method for ground improvement is aggregate piers. Before aggregate piers were used, engineers had to replace the weak soil with an engineering fill in order to use shallow foundations, but in some cases (load is very high) they had to use deep foundations, which is much more expensive. By using aggregate piers, we can now use shallow foundations in marginal soil without having to replace it. By using compacted aggregate to create stiff pier element, aggregate piers help to increase the bearing capacity, liquefaction resistance, shear strength, rate of consolidation and it reduces settlement.
middle of paper ... ... s are dangerous and toxic. Despite the precaution taken in supplementing these chemicals into water, there still exists the probability that these hazardous chemicals will be reproduced by reactions with bodily fluids in areas where they may cause harm to the individual. The production of these chemicals is outlined in the previous section on Chemistry. Future and Conclusion Ultimately, water fluoridation is not a necessary treatment.
A reference file of Safety Data Sheets (SDS) is available to all personnel. Analysts shall review this source of information before using any of the reagents/chemicals specified in this or any other AAA SOP.
Prowell, B. D., & Franklin, A. G. (1995). Evaluation of cold mixes for winter pothole repair. Charlottesville, Va.: Virginia Transportation Research Council.
I decided to experiment with pHs within the range pH 2 to pH7, as I
The advantage of these materials is that embankments and pavement bases for highways can be built. Some mining companies have made use of these materials for the better of the environment.
It can be said that similar methods can be elsewhere for other biological problems such as the acidification of ecosystems where acid rain, as a result of sulphur dioxide dissolves aluminium salts in rivers and lakes which suffocates fish.
During my under graduation I have learnt only about basics of pavement materials and different layers of pavements. It was only after studying graduate courses I realized how limited my knowledge was and I need to work very hard and explore more in this vast field. During first year of my graduate study I have studied Pavements Materials, Pavement Design and Evaluation, Highway Construction Practices and these graduate courses opened a new paradigm for me to the way I looked at pavement engineering. This prompted me to look at it as a field full of challenges which make it even more dynamic and op...