scholarly journals Compaction Characteristics of Swelling Soil Stabilized with Bottom Ash and Geogrid

2019 ◽  
Vol 12 (6) ◽  
pp. 157-162
Author(s):  
C. Rajakumar ◽  
P. Kodanda Rama Rao
Keyword(s):  
Power Plants ◽  
Soil Stabilization ◽  
Clayey Soil ◽  
Thermal Power ◽  
Bottom Ash ◽  
Thermal Power Plants ◽  
Swelling Soil ◽  
Grade Material ◽  
The One ◽  
Stated Problem

This paper brings out the results of experimental work carried out in the laboratory to evaluate the effectiveness of using bottom ash with geogrid for soil stabilization by studying the compaction and strength characteristics for use as a sub-grade material. Bottom ash is a waste material which is obtained from thermal power plants. This waste imposes hazardous effect on environment and human health. This material cannot be disposed of properly and their disposal is not economical. Utilization by exploiting their inherent properties is the one of the way to solve the above stated problem. The effect of mixing different proportions of bottom ash with geogrid in clayey soil on compaction, UCS and California bearing ratio have been studied in this study.

Identification of waste management strategies and waste generation factors for thermal power plant sector wastes in Turkey

2018 ◽  
Vol 37 (3) ◽  
pp. 210-218
Author(s):  
Cansu Demir ◽  
Ülkü Yetiş ◽  
Kahraman Ünlü
Keyword(s):  
Waste Management ◽  
Power Plants ◽  
Production Systems ◽  
Thermal Power ◽  
Management Strategies ◽  
Bottom Ash ◽  
Thermal Power Plants ◽  
Waste Generation ◽  
Turkish Republic ◽  
Process Modification

Thermal power plants are of great environmental importance in terms of the huge amounts of wastes that they produce. Although there are process-wise differences among these energy production systems, they all depend on the logic of burning out a fuel and obtaining thermal energy to rotate the turbines. Depending on the process modification and the type of fuel burned, the wastes produced in each step of the overall process may change. In this study, the most expected process and non-process wastes stemming from different power generation processes have been identified and given their European Waste Codes. Giving priority to the waste minimization options for the most problematic wastes from thermal power plants, waste management strategies have been defined. In addition, by using the data collected from site visits, from the literature and provided by the Turkish Republic Ministry of Environment and Urbanization, waste generation factor ranges expressed in terms of kilogram of waste per energy produced annually (kg/MWh) have been estimated. As a result, the highest generation was found to be in fly ash (24–63 for imported coal, 200–270 for native coal), bottom ash (1.3–6 for imported coal, 42–87 for native coal) and the desulfurization wastes (7.3–32) produced in coal combustion power plants. The estimated waste generation factors carry an important role in that they aid the authorities to monitor the production wastes declared by the industries.

scholarly journals Utilizing Coal Bottom Ash from Thermal Power Plants in Vietnam as Partial Replacement of Aggregates in Concrete Pavement

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Nu Nguyen Thi ◽  
Thinh Phi Hong ◽  
Son Bui Truong
Keyword(s):  
Power Plants ◽  
Cement Content ◽  
Thermal Power ◽  
Bottom Ash ◽  
Concrete Pavement ◽  
Partial Replacement ◽  
Technical Requirement ◽  
Thermal Power Plants ◽  
Rural Roads ◽  
Flexural Tensile Strength

In Vietnam, a large amount of coal bottom ash (CBA) is being discharged from thermal power plants and has been making serious environmental pollution. It is essential to utilize the CBA to reduce environmental pollution. So, this paper presents a series of experimental studies in the laboratory using CBA as a partial replacement of aggregates in concrete pavement for rural roads. In mixing concrete, the CBA is utilized to replace 15, 30, and 100% aggregates. The design of the composition must achieve the technical requirement of M-30 grade of concrete. A total 351 of specimens were tested on workability of fresh concrete, abrasion, compressive strength, and flexural tensile strength in order to achieve the technical requirement of concrete pavement for rural roads. Based on the experimental results, in order to achieve the required compressive strength, An Khanh CBA concrete uses more content of cement and water than control concrete; Cao Ngan CBA is only utilized to replace 15% aggregates, and Cao Ngan CBA concrete also uses more cement and water than control concrete. It also shown that the amount of water and cement content depend on types of CBA and the water amount and cement content of CBA concrete are larger than those of control concrete. The advantage of mixture CBA concrete is abrasion, and flexural tensile strength achieved the value as per the technical requirement.

scholarly journals The initial research on the compressive strength of mortar when using bottom ash from thermal power plants to replace natural sand in construction

2020 ◽  
Vol 61 (3) ◽  
pp. 12-18
Author(s):  
Hung Van Nguyen ◽  
Son Truong Bui ◽  
Hai Huu Phung ◽  
Ha Ngoc Thi Pham ◽  
Keyword(s):  
Compressive Strength ◽  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
Thermal Power Plants ◽  
Mortar Sample ◽  
Natural Sand ◽  
Main Method ◽  
Initial Research ◽  
Masonry Mortar

The paper presents the compressive strength of mortar samples when replacing natural sand by bottom ash of An Khanh and Cao Ngan thermal power plants (TPPs) in Thai Nguyen province. Experimental research is the main method applied in this research. Research results show that replacing natural sand by bottom ash in the two TPPs, the compressive strength of samples reached the required mortar’s strength. The compressive strength of the mortar sample replaced all-natural sand, particularly for masonry mortar and plastering mortar, is 10.9 MPa and 16.4 MPa respectively for An Khánh TTP, and 12.7 MPa and 12.6 MPa for Cao Ngan TTP, while the compressive strength of the motar used all natural sand, reached 13.2 MPa and 8.6 MPa.

scholarly journals AN EXPERIMENTAL STUDY ON EFFECTIVE UTILIZATION OF BOTTOM ASH (ENNORE) AS FINE AGGREGATE IN CONCRETE UNDER FLEXURE

2017 ◽  
Vol 5 (6) ◽  
pp. 152-158
Author(s):  
Kai Kannan ◽  
R Vijaya Kumar
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
Project Work ◽  
Fine Aggregate ◽  
Thermal Power Plants ◽  
Split Tensile Strength ◽  
Effective Utilization ◽  
Compressive Strength Of Concrete ◽  
Day By Day

Since  the  construction  industry  is  developing  very  fast  the  requirement  of  concrete  and  their constituent  materials are also increasing day by day. Hence the need becomes in evitable to find various alternate means for the aggregate and accordingly the researchers are going on in this way. But the availability of fine aggregate becomes difficult day by day.  Hence the need arises to find alternative for the fine aggregate. The material which is known as bottom ash is available ash waste by-product material from the thermal power plants.  In  India  most  of  the  thermal  power plants  use  wet  system  for disposal of ash. Bottom ash will be generated as a residue after burning pulverised coal at boiler cyclone and collected from bottom ash hopper located under boiler structure. In this project work the material bottom ash is experimentally analysed and studied for its suitability as replacement as fine aggregate up to (0% to 50%). So far few researchers analysed its suitability as FA by finding the compressive strength of concrete. But  in  this  project  work the  split  tensile  strength  of  concrete  and  flexural  strength  of concrete were analysed by replacing bottom ash as fine aggregate.

scholarly journals Use of class C fly ash for stabilization of fine-grained soils

2020 ◽  
Vol 195 ◽  
pp. 06001
Author(s):  
Canan Turan ◽  
Akbar Javadi ◽  
Raffaele Vinai ◽  
Nader Shariatmadari ◽  
Raziyeh Farmani
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Soil Stabilization ◽  
Clayey Soil ◽  
Thermal Power ◽  
Fine Grained ◽  
Alternative Material ◽  
Stabilized Soil ◽  
Class C ◽  
Burning Coal

Fine-grained soils may have undesired characteristics such as high swelling potential and low strength, thus requiring improvements. One of the stabilization methods involves the use of fly ash. Fly ash is a waste material obtained from burning coal in thermal power plants. The use of fly ash is encouraged as an alternative material for soil stabilization, due to its features such as pozzolanic properties and economic availability. This paper describes the results of an experimental study on stabilization of a clayey soil with fly ash. Unconfined compressive strength (UCS), triaxial and consolidation tests were carried out on samples of kaolinite mixed with class C fly ash at different percentages and cured for 1, 7, and 28 days, in order to study the effects of class C fly ash on the mechanical behaviour of the stabilized soil. The results showed that the inclusion of fly ash significantly improves the strength characteristics of the soil. Curing time was also found to have a significant effect on improving the properties of the soil.

scholarly journals Investigation of the bottom ash slags influence on the heavy concrete frost resistance

2018 ◽  
Vol 230 ◽  
pp. 03019 ◽  
Author(s):  
Volodymyr Shulgin ◽  
Dmytro Yermolenko ◽  
Heorhii Durachenko ◽  
Oleksandr Petrash ◽  
Oksana Demchenko
Keyword(s):  
Response Function ◽  
Frost Resistance ◽  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
Thermal Power Plants ◽  
Response Functions ◽  
Software Complex ◽  
Compaction Time ◽  
Three Factor

This paper addresses the issue of the influence of cement consumption, plasticizing additive, and compaction time on the strength and frost resistance of concrete manufactured with bottom ash slags from thermal power plants. The investigation was carried out using the three-factor experiment with variables varied at three levels. There were received response functions, which characterize the correlation between frost resistance and variables: cement consumption, plasticizer additives and compaction time. An analysis of the surface of the response function, where the frost resistance of the concrete was accepted as a response, revealed the optimal correlation between the components of the mixture and the compaction time of the seal. By using the STATISTICA 12 software complex, the values of the factors were specified, when the optimal components ratio with GLENIUM 51 superplasticizer is achieved for the production of concrete with high frost resistance that is greater than F300. The conclusions quantify the results of the investigation.

scholarly journals Reduction of un-burnt in bottom ash of coal fired boilers

2018 ◽  
Vol 7 (2.8) ◽  
pp. 201
Author(s):  
E Vignesh ◽  
A Chandhru ◽  
G Mahfooz ◽  
K B.Sumanth ◽  
R Gowtham Krishna
Keyword(s):  
Power Generation ◽  
Developing Countries ◽  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
High Rate ◽  
Thermal Power Plants ◽  
Traditional Methods ◽  
Day By Day

In a recent updating world moves related to automation and its improvements but only thread to pause to its electricity. Because it could not be automated and its need to be generated by using different way of methods. In that the Electricity is one the greatest demands that keeps increasing day by day. To feed its supply the necessity of improved power generation techniques is in need. Combustion of coal is one of the traditional methods of producing electricity in developing countries like India. So, it is necessary to have a good optimized boiler to generate power in thermal power plants. The coal fed in should be completely utilized for combustion as the coal is imported at a high rate. But the amount of un-burnt carbon found in the bottom ash slips down the efficiency of a boiler. Here we are going to analyses the causes for more number of un-burnt in bottom ash and methodology to reduce it thereby the efficiency of the boiler gets increased.

Tüv Nord Group Strategy Concept Coop: An Answer for the New Requirements of the Power Plant Flexibilisation

2012 ◽  
Author(s):  
Ralf Trieglaff ◽  
Detlef Rieck ◽  
Astrid Schulze ◽  
Axel Schulz
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Rapid Expansion ◽  
The Other ◽  
Thermal Power Plants ◽  
Safety Standards ◽  
Regenerative Power ◽  
Inspection And Maintenance ◽  
Number Of Cycles ◽  
The One

The ambitious German energy program predicts a rapid expansion of regenerative power generation. Caused by the fluctuating nature of regenerative forms of energy, the need for backup capacities in the form of similar-sized thermal power plants is clear. Consequently, components of gas and coal-fired power plants are exposed to sharp transients and a high number of cycles. If German design regulations are observed, these operating requirements will lead to high levels of depletion of the integrated components. As a result, inspection and maintenance efforts will also increase. A reduction in the components’ life cycle can lead to a significant increase in costs. To effectively deal with significantly higher requirements, the TÜV NORD Group has designed a strategy, COOP (Cycle Optimized Operation), that allows, on the one hand, a reduction of conservative assessments and, on the other hand, the development of new safety standards in the evaluation of the service life.

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