Influence of hydrothermal treatment on the mechanical and environmental performances of mortars including MSWI bottom ash

2018 ◽  
Vol 78 ◽  
pp. 639-648 ◽  
Author(s):  
V. Caprai ◽  
K. Schollbach ◽  
H.J.H. Brouwers
Keyword(s):  
Hydrothermal Treatment ◽  
Bottom Ash ◽  
Mswi Bottom Ash

Hydrothermal treatment of MSWI bottom ash forming acid-resistant material

2009 ◽  
Vol 29 (3) ◽  
pp. 1048-1057 ◽  
Author(s):  
Jiro Etoh ◽  
Takeshi Kawagoe ◽  
Takayuki Shimaoka ◽  
Koichiro Watanabe
Keyword(s):  
Hydrothermal Treatment ◽  
Bottom Ash ◽  
Resistant Material ◽  
Mswi Bottom Ash

scholarly journals Positive Influence of Liquid Sodium Silicate on the Setting Time, Polymerization, and Strength Development Mechanism of MSWI Bottom Ash Alkali-Activated Mortars

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1927
Author(s):  
Lei Jin ◽  
Guodong Huang ◽  
Yongyu Li ◽  
Xingyu Zhang ◽  
Yongsheng Ji ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Setting Time ◽  
Bottom Ash ◽  
Free Water ◽  
Polymerization Reaction ◽  
Liquid Sodium ◽  
Strength Development ◽  
Mswi Bottom Ash ◽  
Alkali Activated ◽  
Development Mechanism

Setting time and mechanical properties are key metrics needed to assess the properties of municipal solid waste incineration (MSWI) bottom ash alkali-activated samples. This study investigated the solidification law, polymerization, and strength development mechanism in response to NaOH and liquid sodium silicate addition. Scanning electron microscopy and X-ray diffraction were used to identify the formation rules of polymerization products and the mechanism of the underlying polymerization reaction under different excitation conditions. The results identify a strongly alkaline environment as the key factor for the dissolution of active substances as well as for the formation of polymerization products. The self-condensation reaction of liquid sodium silicate in the supersaturated state (caused by the loss of free water) is the major reason for the rapid coagulation of alkali-activated samples. The combination of both NaOH and liquid sodium silicate achieves the optimal effect, because they play a compatible coupling role.

Reuse of MSWI bottom ash mixed with natural sodium bentonite as landfill cover material

2013 ◽  
Vol 31 (6) ◽  
pp. 577-584 ◽  
Author(s):  
Sara Puma ◽  
Franco Marchese ◽  
Andrea Dominijanni ◽  
Mario Manassero
Keyword(s):  
Bottom Ash ◽  
Sodium Bentonite ◽  
Landfill Cover ◽  
Mswi Bottom Ash ◽  
Cover Material

Effect on Compressive Strength by Mixing Ratio of MSWI Melting Slag/Bottom Ash

2009 ◽  
Vol 620-622 ◽  
pp. 631-634
Author(s):  
Woo Keun Lee ◽  
Eun Zoo Park ◽  
Ji Hyeon Lee ◽  
Yeong Seok Yoo
Keyword(s):  
Crystal Structure ◽  
Heavy Metals ◽  
Compressive Strength ◽  
Bottom Ash ◽  
Environmental Safety ◽  
Resource Conservation ◽  
Leaching Test ◽  
Mixing Ratio ◽  
Mswi Bottom Ash ◽  
Melting Slag

In this work, inorganic paste was made from melting slag (MS) of MSWI ash and MSWI bottom ash (MBA) by geopolymer technique. Heavy metals such as Pb and Cu are highly contained in MBA. In the view of environmental protection and resource conservation, recycling of MSWI ash is desirable. MS and MBA were mixed to make inorganic paste. Compressive strength was measured to evaluate the characteristics of inorganic paste after the period of 1, 3 and 7day. Compressive strength of almost 90 MPa was obtained at the mixing ratio of MS : MBA = 9 : 1. And the crystalloid and crystal structure was analyzed by FTIR and XRD. Korea Standard leaching Test (KSLT) is also used to evaluate the environmental safety of inorganic paste. The leached concentration of Pb and Cu were 0.44 ppm and 0.15 ppm, respectively. According to this result, heavy metals were safety immobilized and stabilized.

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