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 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 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 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.

Characteristics of Compressed Concrete Paving Units Produced from Washed Municipal Solid Waste Incinerator Bottom Ash

2013 ◽  
Vol 723 ◽  
pp. 588-593 ◽  
Author(s):  
Wen Ten Kuo ◽  
Chih Chien Liu ◽  
Her Yung Wang ◽  
Chun Ya Shu
Keyword(s):  
Compressive Strength ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Solid Waste Incinerator

This study replaced natural aggregate with a fine aggregate of washed municipal solid waste incinerator bottom ash (WMSWIBA) in the production of compressed concrete paving units to increase the applications of WMSWIBA. The cement-aggregate ratios investigated were 0.1, 0.2, 0.3, 0.4 and 0.5, and the water-cement ratios were 0.20, 0.25 and 0.30. The results showed that the coefficient of permeability of the compressed concrete paving units was less than 2.66×10-5 cm/sec, the water absorption was 13.55~4.75%, the porosity was 8.05~1.62%, the compressive strength was 12.3~48.5 MPa, the ultrasonic pulse velocity was 1521~3059 m/sec, and the attrition volume loss was 117.7~16.0 cm3/50 cm2. The results suggested that the compressive strength and ultrasonic pulse velocity increase with the cement-aggregate ratio, whereas the attrition loss decreases.

scholarly journals Engineering Properties of Controlled Low-Strength Materials Containing Bottom Ash of Municipal Solid Waste Incinerator and Water Filter Silt

2018 ◽  
Vol 8 (8) ◽  
pp. 1377 ◽  
Author(s):  
Wen-Ten Kuo ◽  
Zhen-Chang Gao
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Engineering Properties ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Water Filter ◽  
Mswi Bottom Ash ◽  
Fine Aggregates ◽  
Solid Waste Incinerator

The bottom ash of a municipal solid waste incinerator (MSWI) and water filter silt (WFS) were applied to a controlled low-strength material (CLSM) in the present study. The CLSM of the control group was composed of cement, water, and fine aggregates. WFS was first used as a fill material to replace 10% of the volume of natural fine aggregates in the CLSM. MSWI bottom ash was used to replace 0%, 25%, 50%, 75%, and 100% of the volume of the remaining natural fine aggregates with a water-cement ratio of 1.6. The engineering properties of freshness, hardening, and durability were examined. The results revealed that the slump flows of all of the mixture proportions ranged between 50 and 70 cm. The tube flow ranged between 20 and 30 cm, conforming to ASTM D6103 and construction regulations regarding CLSMs stipulated by the Water Resources Agency of the Ministry of Economic Affairs in Taiwan. Increases in the replacement amount of MSWI bottom ash prolonged the time required to achieve a resistance to penetration of 2.74 MPa. The diameter of the drop test ball was less than 7.6 cm, indicating that the mixture proportions had sufficient bearing capacity for successive construction. At an age of 28 d, the compressive strength did not exceed the 8.4 MPa prescribed in ASTM D4832. The ultrasonic pulse velocity and water absorption exhibited identical growth tendencies. In summary, using MSWI bottom ash to create CLSMs is feasible on the condition that the appropriate amount of WFS should be added.

scholarly journals Effect of Mass Proportion of Municipal Solid Waste Incinerator Bottom Ash Layer to Municipal Solid Waste Layer on the Cu and Zn Discharge from Landfill

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Qingna Kong ◽  
Jun Yao ◽  
Zhanhong Qiu ◽  
Dongsheng Shen
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Mswi Bottom Ash ◽  
Ash Layer ◽  
Mass Proportion ◽  
Solid Waste Incinerator ◽  
Cu And Zn

Municipal solid waste incinerator (MSWI) bottom ash is often used as the protection layer for the geomembrane and intermediate layer in the landfill. In this study, three sets of simulated landfills with different mass proportion of MSWI bottom ash layer to municipal solid waste (MSW) layer were operated. Cu and Zn concentrations in the leachates and MSW were monitored to investigate the effect of MSWI bottom ash layer on the Cu and Zn discharge from the landfill. The results showed that the Zn discharge was dependent on the mass proportion of MSWI bottom ash layer. The pH of landfill was not notably increased when the mass proportion of MSWI bottom ash layer to MSW layer was 1 : 9, resulting in the enhancement of the Zn discharge. However, Zn discharge was mitigated when the mass proportion was 2 : 8, as the pH of landfill was notably promoted. The discharge of Cu was not dependent on the mass proportion, due to the great affinity of Cu to organic matter. Moreover, Cu and Zn contents of the sub-MSW layer increased due to the MSWI bottom ash layer. Therefore, the MSWI bottom ash layer can increase the potential environmental threat of the landfill.

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