scholarly journals Field Studies Of MSWI Bottom Ash As Aggregate For Unbound Base Course Mixtures

2021 ◽  
Vol 1202 (1) ◽  
pp. 012016
Author(s):  
Judita Gražulytė ◽  
Audrius Vaitkus ◽  
Egidijus Rytas Vaidogas ◽  
Ovidijus Šernas
Keyword(s):  
Bottom Ash ◽  
Field Studies ◽  
Waste Incinerator ◽  
The European Union ◽  
Heavy Vehicles ◽  
Continuous Growth ◽  
Mswi Bottom Ash ◽  
Parking Lot ◽  
Base Course ◽  
And Performance

Abstract In the European Union, about 30–40 million tonnes of residues known as municipal solid waste incinerator (MSWI) bottom ash is generated and landfilled annually. To address the continuous growth of landfills and to implement zero waste and circular economy policies, researchers are researching ways to turn MSWI bottom ash into a useable resource. The conducted studies show that MSWI bottom ash is suitable for civil engineering, especially for roads, however there is a lack of field studies. As a result, MSWI bottom ash was used to construct unbound base course in heavy vehicles parking lot in 2018 and two pedestrian paths in 2018 and 2020 in Vilnius (Lithuania). This paper focuses on the structures composition and performance of those unbound base courses in terms of stability of particle size distribution, bearing capacity and permeability. The conducted study showed promising results for MSWI bottom ash as aggregate (mixture) to construct unbound base course.

scholarly journals Performance of concrete mixtures containing MSWI bottom ash

2021 ◽  
Author(s):  
Judita Gražulytė ◽  
Audrius Vaitkus ◽  
Alfredas Laurinavičius ◽  
Ovidijus Šernas
Keyword(s):  
Compressive Strength ◽  
Bottom Ash ◽  
Waste To Energy ◽  
Waste Incinerator ◽  
The European Union ◽  
Continuous Growth ◽  
Mswi Bottom Ash ◽  
Concrete Mixtures ◽  
Natural Aggregates ◽  
Solid Waste Incinerator

In the European Union, each inhabitant annually generates about 500 kg of municipal waste. About 30 % of this are incinerated in waste-to-energy plants. It results in approximately 20 million tonnes of residues known as municipal solid waste incinerator (MSWI) bottom ash, which is typically landfilled. To address the continuous growth of landfills and to implement zero waste and circular economy policies, researchers are focusing on possibilities to use MSWI bottom ash in civil engineering instead of landfilling. One of them is to replace natural aggregates in concrete mixtures applicable for roads with MSWI bottom ash. Therefore, the subject of this research is the performance of concrete mixtures containing different amount (0–100%) and fraction (0/5–0/16) of MSWI bottom ash. Four specimens with similar aggregate gradations were designed. Each of them was mixed with two different amount (340 kg/m3 and 300 kg/m3) of cement (CEM I 42.5 R). In total eight different concrete mixtures were tested and analysed. The performance of designed concrete mixtures containing different amount of MSWI bottom ash was evaluated according to density and compressive strength after 28 days. The results showed good MSWI bottom ash performance as a substitute for natural aggregates. The compressive strength after 28 days varied from 21 MPa to 29 MPa depending on the aggregate type and amount of MSWI bottom ash and cement. For concrete mixtures made only of MSWI bottom ash at least 340 kg/m3 of cement is required to achieve compressive strength higher than 20 MPa.

scholarly journals Weathering treatment coupled with nano-silica filling to promote the engineering property of municipal solid waste incinerator bottom ash

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38701-38705
Author(s):  
Qingna Kong ◽  
Jun Yao ◽  
Qian Yang ◽  
Dongshen Shen ◽  
Yuyang Long
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Engineering Properties ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Nano Silica ◽  
New Approach ◽  
Mswi Bottom Ash ◽  
Solid Waste Incinerator

A new approach including weathering treatment and nano-silica filling was employed to promote the engineering properties of municipal solid waste incinerator (MSWI) bottom ash.

scholarly journals Impact of MSWI Bottom Ash Codisposed with MSW on Landfill Stabilization with Different Operational Modes

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Wen-Bing Li ◽  
Jun Yao ◽  
Zaffar Malik ◽  
Gen-Di Zhou ◽  
Ming Dong ◽  
...  
Keyword(s):  
Organic Matter ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Acid Neutralizing Capacity ◽  
Waste Incinerator ◽  
Mswi Bottom Ash ◽  
Neutralizing Capacity ◽  
Leachate Quality ◽  
The Impact

The aim of the study was to investigate the impact of municipal solid waste incinerator (MSWI) bottom ash (BA) codisposed with municipal solid waste (MSW) on landfill stabilization according to the leachate quality in terms of organic matter and nitrogen contents. Six simulated landfills, that is, three conventional and three recirculated, were employed with different ratios of MSWI BA to MSW. The results depicted that, after 275-day operation, the ratio of MSWI BA to fresh refuse of 1 : 10 (V : V) in the landfill was still not enough to provide sufficient acid-neutralizing capacity for a high organic matter composition of MSW over 45.5% (w/w), while the ratio of MSWI BA to fresh refuse of 1 : 5 (V : V) could act on it. Among the six experimental landfills, leachate quality only was improved in the landfill operated with the BA addition (the ratio of MSWI BA to fresh refuse of 1 : 5 (V : V)) and leachate recirculation.

scholarly journals Formation of Humic Substances in Weathered MSWI Bottom Ash

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Haixia Zhang ◽  
Takayuki Shimaoka
Keyword(s):  
Humic Acid ◽  
Municipal Solid Waste ◽  
Humic Substances ◽  
Incubation Time ◽  
Bottom Ash ◽  
Effect Of Temperature ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Mswi Bottom Ash ◽  
Solid Waste Incinerator

The study aimed at evaluating the humic substances (HSs) content from municipal solid waste incinerator (MSWI) bottom ash and its variation with time and the effect of temperature on HSs formation. The process suggested by IHSS was applied to extract HSs from two different bottom ash samples, and the extracted efficiency with NaOH and Na4P2O7was compared. MSWI bottom ash samples were incubated at37∘Cand50∘Cfor 1 year. HSs and nonhumic substances were extracted from the bottom ash sample with different incubated period by 0.1 M NaOH/Na4P2O7. Results show that the rate of humic acid formation increased originally with incubation time, reached a maximum at 12th week under37∘Cand at 18th week under50∘C, and then decreased with time. More humic acid in MSWI bottom ash was formed under50∘Cincubated condition compared with that incubated under37∘C. Also, the elemental compositions of HSs extracted from bottom ash are reported.

Crack Sealing in Flexible Pavements: A Life-Cycle Cost Analysis

1996 ◽  
Vol 1529 (1) ◽  
pp. 86-94 ◽  
Author(s):  
Joseph E. Ponniah ◽  
Gerhard J. Kennepohl
Keyword(s):  
Life Cycle Cost ◽  
Cost Effective ◽  
Field Studies ◽  
Asphalt Pavements ◽  
Pavement Distress ◽  
Crack Sealing ◽  
Pavement Deterioration ◽  
Base Course ◽  
And Performance ◽  
The Cost

Pavement cracks are usually sealed to prevent water from entering base course layers. Experience suggests that water in pavement layers hastens pavement deterioration and, therefore, increases rehabilitation costs. Initially the Ministry of Transportation, Ontario (MTO), Canada, had limited success in sealing cracks because inappropriate materials and installation procedures were used. This setback during the initial stages of development in crack sealing raised questions about the effectiveness of crack sealing in reducing the rate of pavement deterioration. In the 1970s and 1980s MTO carried out several field studies to develop an effective crack sealing procedure and to study the influence of crack sealing on pavement distress and performance. The cost-effectiveness of this treatment was investigated as well. The results of the studies indicate that sealing cracks is a viable and cost-effective preventive maintenance treatment and can extend the service life of asphalt pavements by at least 2 years. However, for optimum benefits the crack sealing program must be implemented according to guidelines proposed. The guidelines provide a basis for the selection of suitable pavements and cracks, sealant materials, and application procedures.

scholarly journals Mechanical Properties of Municipal Solid Waste Incinerator (MSWI) Bottom Ash as Alternatives of Subgrade Materials

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Yucheng Huang ◽  
Ji Chen ◽  
Shenjie Shi ◽  
Bin Li ◽  
Jialin Mo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Rapid Development ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Treatment Method ◽  
Waste Incinerator ◽  
Air Pollution Control ◽  
Mswi Bottom Ash

The rapid development of industrialization, urbanization, and population of the society augments the rising amount of municipal solid waste (MSW). With the advantage of considerably reducing mass and volume of solid wastes and generating energy, the incineration is a widely used treatment method for MSW. During the incineration process, the organic substances contained in the wastes are combusted, and the massive residues are remained. Of the incineration residues, bottom ash takes up to 80–90%, and the remainders are fly ash along with air pollution control residues. Dealing with the municipal solid waste incineration (MSWI) bottom ash in a sustainable manner is the primary principle. Significantly, MSWI bottom ash has been successfully utilized in diverse beneficial applications in recent decades, especially in civil engineering applications. This paper investigates the mechanical properties and validity of MSWI bottom ash as applicable substitutes of conventional subgrade materials. For this reason, a series of direct shear and CBR tests are performed on specimens with different water contents and dry densities.

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