scholarly journals Properties of Alkali Activated Lightweight Aggregate Generated from Sidoarjo Volcanic Mud (Lusi), Fly Ash, and Municipal Solid Waste Incineration Bottom Ash

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2528
Author(s):  
Puput Risdanareni ◽  
Yury Villagran ◽  
Katrin Schollbach ◽  
Jianyun Wang ◽  
Nele De Belie
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Lightweight Aggregate ◽  
Waste Incineration ◽  
Raw Material ◽  
Fine Aggregate ◽  
Municipal Solid Waste Incineration

Production of artificial lightweight aggregate (LWA) from industrial by-products or abundant volcanic mud is a promising solution to prevent damaging the environment due to the mining of natural aggregate. However, improvements are still needed in order to control the high water absorption of LWA and strength reduction in resulting concrete or mortar. Hence in this research, fly ash, municipal solid waste incineration bottom ash (MSWI BA), and Sidoarjo volcanic mud (Lusi) were employed as a precursor and activated using NaOH 6 M and Na2SiO3 in producing LWA. The influence of the type of the precursors on the physical properties of resulting LWA was investigated. The effect of replacing natural fine aggregate with the resulting LWA on the compressive strength and volume density of mortar was also determined. Finer particles, a high amount of amorphous phase, and low loss on ignition (LOI) of the raw material improved the properties of resulting LWA. Mortar compressive strength was decreased by 6% when replacing 16% by volume of natural fine aggregate with fly ash based LWA. Compared to the expanded clay LWA, the properties of alternative LWAs in this study were slightly, but not significantly, inferior. Alternative LWA becomes attractive when considering that expanded clay LWA requires more energy during the sintering process.

scholarly journals Solidification of Municipal Solid Waste Incineration Fly Ash through Co-Mechanical Treatment with Circulation Fluidized Bed Combustion Fly Ash

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 141
Author(s):  
Zhengzhen Yao ◽  
Zhonghui Xu ◽  
Qin Shuai ◽  
Xiaoyue Chen ◽  
Zao Jiang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Fluidized Bed ◽  
Mechanical Treatment ◽  
Waste Incineration ◽  
Municipal Solid Waste Incineration ◽  
Fluidized Bed Combustion ◽  
Waste Incineration Fly Ash

This study aims to explore the solidification performance of municipal solid waste incineration fly ash (MSWIFA) through co-mechanical treatment with circulation fluidized bed combustion fly ash (CFBCFA). The mineral characterization, physical properties, and leaching resistance of the solidified bodies are investigated by X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetry-differential thermal analysis (TG-DTA), compressive strength, porosity, and leaching test, respectively. C–S–H, ettringite (AFt), and Friedel’s salt (FS) are the predominant hydrate products in the CFBCFA based solidified bodies, which are similar to the cement based solidified bodies. However, CFBCFA based solidified bodies exhibit higher compressive strength (36.7 MPa) than cement based solidified bodies (11.28 MPa), attributing to the three reasons: lower porosity and more compact internal structure of CFBCFA based solidified bodies; large amounts of Ca(OH)2 originating from MSWIFA are conducive to promoting the hydration reaction extent and compressive strength of the CFBCFA based solidified bodies; excessive Ca(OH)2 would cause compressive strength deterioration for the cement based solidified bodies. The heavy metals (Zn, Cu, Cr, Cd, and Pb) concentrations in the extraction solution of the CFBCFA based solidified bodies are far below the requirements of Chinese National Standard GB 5085.3-2007. The solidification of MSWIFA through co-mechanical treatment could be an ideal substitute for cement solidification technology.

Zero-waste approach in municipal solid waste incineration: Reuse of bottom ash to stabilize fly ash

2020 ◽  
Vol 245 ◽  
pp. 118779 ◽  
Author(s):  
Ahmad Assi ◽  
Fabjola Bilo ◽  
Alessandra Zanoletti ◽  
Jessica Ponti ◽  
Andrea Valsesia ◽  
...  
Keyword(s):  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Municipal Solid Waste Incineration ◽  
Zero Waste

The use of calcium sulfo-aluminate cement as an alternative to Portland Cement for the recycling of municipal solid waste incineration bottom ash in mortar

2020 ◽  
Vol 38 (8) ◽  
pp. 868-875
Author(s):  
Marc Antoun ◽  
Frédéric Becquart ◽  
Najib Gerges ◽  
Georges Aouad
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Cementitious Materials ◽  
Hydrogen Gas ◽  
Municipal Solid Waste Incineration ◽  
Cement Pastes

Municipal solid waste incineration generates large quantities of bottom ash that should be recycled. Current use of municipal solid waste incineration bottom ash (MSWI-BA) in cementitious materials is mostly in Ordinary Portland Cement (OPC). This paper considers using MSWI-BA as sand substitution in Calcium Sulfoaluminate Cement (CSA) as an alternative to OPC. A comparison between OPC and CSA mortars containing 0–2 mm MSWI-BA is conducted. The MSWI-BA used was treated to remove the ferrous and non-ferrous metals in order to obtain a better mineral fraction. Different percentages (0%, 25%, 50%, 75%, and 100%) of standard sand were substituted by MSWI-BA based on equivalent volume. Experimental results showed that the compressive strength and porosity of the CSA mortars were superior to OPC after substitution at 1, 7, 28, and 90 days. The compressive strength of OPC mortars with 25% substitution decreased by 40% compared to 11% for CSA mortars at 90 days. This is due to the difference in pH between the two cement pastes as OPC in contact with the MSWI-BA leads to a reaction with the aluminum content which releases hydrogen gas, increases the porosity, and decreases the compressive strength.

scholarly journals Microstructure and Strength of Alkali-Activated Bricks Containing Municipal Solid Waste Incineration (MSWI) Fly Ash Developed as Construction Materials

2019 ◽  
Vol 11 (5) ◽  
pp. 1283 ◽  
Author(s):  
Peng Xu ◽  
Qingliang Zhao ◽  
Wei Qiu ◽  
Yan Xue ◽  
Na Li
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Building Materials ◽  
Waste Incineration ◽  
Engineering Properties ◽  
Chloride Salt ◽  
Municipal Solid Waste Incineration ◽  
Alkali Activated

Alkali-activated materials (AAM) are widely applied in the field of building materials and civil engineering to substitute cement materials. This study used two types of municipal solid waste incineration fly ash (MSWI-FA): grate-firing fly ash (GFFA) and fluidized bed fly ash (FBFA) as brick raw materials. Various weight ratio of 20%, 30%, and 40% GFFA and FBFA were added to coal fly ash (CFA), GGBFs (Ground Granulated Blast-Furnace Slag), and an alkali-activating reagent to produce alkali-activated bricks. Microstructure and crystalline phase composition were observed to analyze their compressive strength, and a leaching test was used to prove the material’s safety for the environment. It can be seen from the results of this study that the alkali-activated bricks containing FBFA had higher compressive strength than those containing GFFA in the same amount. Considering the engineering properties, the alkali-activated bricks containing FBFA are more suitable to be used as building materials. The difference in the compressive strength resulted from the large amount of calcium compounds and chloride salts present in the GFFA. From SEM analysis, it was observed that there was a large number of pores in the microstructure. It was also found from the results of XRD that the bricks containing GFFA contained a large amount of chloride salt. From the results of the two leaching tests, it was found that the amounts of six heavy metals detected in the leachates of the bricks in this study met the corresponding regulation standards. This described MSWI-FA is suitable for use as alkali-activated material, and its products have potential to be commercially used in the future.

Effects of Cement Additives on Alinite Cement-Based Materials from Municipal Solid Waste Incineration (MSWI) Fly Ash

2017 ◽  
Vol 727 ◽  
pp. 1046-1053 ◽  
Author(s):  
Xiao Lu Guo ◽  
Hui Sheng Shi ◽  
Jia Bao Huang
Keyword(s):  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Incineration ◽  
Raw Material ◽  
Cement Clinker ◽  
Municipal Solid Waste Incineration ◽  
Mass Ratio ◽  
Mswi Fly Ash ◽  
Cement Based Materials

Municipal solid waste incineration (MSWI) fly ash was successfully used as a main raw material in sintering and preparing alinite cement clinker in laboratory. Based on this, this work focused on the effects of cement admixtures on the compressive strength and durability of the alinite cement-based materials. The optimum mix mass ratio was confirmed, i.e. the mass ratio of alinite cement clinker / gypsum / cement additives (MSWI fly ash, fly ash, or slag) was 80 % / 5 % / 15 %. The experimental results showed that addition of cement additives could improve resistance to sulfate attack of the prepared alinite cement-based materials. The resistance to carbonation and water permeability could be improved by adding different cement additives. The effectiveness is specimen AD3 (with 15 wt. % slag) > AB3 (with 15 wt. % MSWI fly ash) > AC3 (with 15 wt. % fly ash). However, addition of cement additives had negative effects on the dry shrinkage. Finally, with the hydration ages increasing, the content of soluble chloride ion from alinite cement specimen AB3 was decreased. It would be stable in long term. This work improves utilization of industrial solid wastes as cement additives in the prepared alinite cement from MSWI fly ash. It is beneficial for our understanding and application of alinite composite cement as construction and building materials.

Analysis of Macro-Performance of FA Ceramic Brick

2013 ◽  
Vol 849 ◽  
pp. 279-282
Author(s):  
Hai Ying Zhang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Municipal Solid Waste ◽  
Water Absorption ◽  
Solid Waste ◽  
Waste Incineration ◽  
Municipal Solid Waste Incineration ◽  
Ceramic Brick ◽  
Mswi Fly Ash ◽  
Waste Incineration Fly Ash

In this work, MSWI (municipal solid waste incineration) fly ash is used as a blending in production of ceramic brick by taking advantage of its high contents of SiO2, Al2O3 and CaO. Besides, macro-performance of the product was studied. It is found that when 20% fly ash is added, the product registers a high compressive strength of 18.9 MPa and a low water absorption of 8.9 % after being sintered at 1000°C. These results as a whole suggest that the use of MSWI fly ash in ceramic brick constitutes a potential means of adding value.

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