Study on Mechanical Properties of Recycled Mixture with High Content of Iron Tailings Sand

This paper focuses on the disposal of iron tailings sand (ITS) and reclaimed inorganic binder stabilized aggregate (RAI), and a new “ITS plus RAI” solid waste treatment method is innovatively proposed, which uses ITS and RAI as a new base course material to replace of new aggregates by 100%. It is found that the new ITS and RAI mixture has excellent compressive performance by designing the material composition of the mixture, which can meet the design strength of different levels of pavement under various load conditions. A series of laboratory tests are used to study the effect of the content of special cementitious material and iron tailings on the uniaxial compressive strength, flexural-tensile strength, compressive resilience modulus, and flexural-tensile resilience modulus of recycled mixture. And, the scanning electron microscope test (SEM) and X-ray diffraction test (XRD) are used to compare the surface morphology characteristics and hydration products of the recycled mixture under different ratios and to discuss the formation mechanism of the strength of the mixture. The test results show that the macroscopic change pattern in laboratory tests is basically consistent with the results in microanalysis. The relationship between compressive strength and compressive resilience modulus and flexural resilience modulus is also established by linear regression. This solid waste treatment method is applied to the pavement renovation project of national and provincial roads in Shanxi Province (within Linfen), to replace the existing base material by using recycled mixture, and the results show that it can save not only the carbon emission from stone mining and processing but also the construction cost, while producing good social and economic benefits and promoting the process of carbon neutralization in the world.

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Selection the Best Technique for Solid Waste Management at Misurata City, Libya

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.i8074.078919 ◽

2019 ◽

Vol 8 (9) ◽

pp. 1250-1257

Keyword(s):

Waste Management ◽

Solid Waste ◽

Waste Treatment ◽

Solid Waste Management ◽

Treatment Method ◽

Weighting Method ◽

Management Processes ◽

Digestion Technique ◽

Solid Waste Treatment ◽

The Subject

The paper presents a proposal for selecting the appropriate waste treatment method for Misurata, reviewing key criteria for such a decision. Many countries use modern methods of solid waste treatment, which can be transformed from the source of pollution into an economic commodity. Libya continues to suffer from solid waste management processes in terms of aggregation, transport or treatment. This paper deals with an approach in the field of solid waste treatment in terms of the nature of these wastes and their methods of management. It also addresses environmental problems related to the subject of solid waste using different treatment methods. It also reviews some studies on this subject. The study concluded that the environmental standard criteria are the most important when making the decision, followed by the technical criteria. At the level of the proposed technique, the study showed that the anaerobic digestion technique is the most appropriate. For the purpose of selecting the best method for solid waste management, the swing weighting method was developed using Ms-Excel.

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Bi-level Planning Model for Integrated Energy Network in Solid Waste Treatment Park

E3S Web of Conferences ◽

10.1051/e3sconf/201911804026 ◽

2019 ◽

Vol 118 ◽

pp. 04026

Author(s):

Shuo Li ◽

Luqing Zhang ◽

Aikang Chen ◽

Yanchi Zhang ◽

Da Xie

Keyword(s):

Solid Waste ◽

Waste Treatment ◽

Operating Cost ◽

Economic Benefits ◽

Planning Model ◽

Factors Affecting ◽

Energy And Environment ◽

Annual Operating Cost ◽

Solid Waste Treatment ◽

Energy Network

In this paper, a bi-level planning model was proposed for the integrated energy network in solid waste treatment park to achieve optimal energy planning in the park. Firstly, the factors affecting planning were analyzed from the aspects of energy and environment. Then, the physical architecture of the integrated energy network planning of the solid waste treatment park was proposed, and the typical energy component models of the solid waste treatment park were proposed. This paper took the annual total cost as the first-level target and the annual operating cost as the second-level target, then proposed the bi-level planning model of the integrated energy network. Finally, the advantages of the model were verified by example. The example shows that under the action of the bi-level planning model, the energy, environment and economic benefits of the solid waste treatment park can be significantly improved.

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Experiment Research on the Mechanics Properties of Urban Garbage Blocks

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.1550 ◽

2011 ◽

Vol 71-78 ◽

pp. 1550-1553

Author(s):

Xing Wen Luo ◽

Hai Lin Yao

Keyword(s):

Compressive Strength ◽

Waste Treatment ◽

Treatment Method ◽

Test Results ◽

Solid Waste Treatment ◽

New Type ◽

Lab Test ◽

Influence Degree ◽

Orthogonal Tests ◽

Curing Age

A municipal solid waste treatment method named stacking landfill of garbage block is brought forward. Garbage blocks were made and a series of tests have been carried out by orthogonal tests method in lab. Test results indicate the early compressive strength of garbage blocks increases quickly, and more slowly in the later period. The compressive strength for 3 days curing age is about 40% ~ 45%s of that for 28 days curing age. The compressive strength for 5 days curing age is about 50%~ 60% of that for 28 days curing age. The compressive strength for 7 days curing age is about 60%~70% of that for 28 days curing age. The rank of the influence degree of the accession material to the compressive strength for 5 days curing age was are the mass of cement, the mass of waste type, compressive stress size, the mass of water, the mass of lime. Stacking landfill of garbage blocks differs from traditional landfill disposal which is a new type of classifier ecological landfill method. It can effectively reduce the volume of urban waste, and the waste can easily be stored and disposed.

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