Review of leaching behavior of municipal solid waste incineration (MSWI) ash.

Technologies for the management of MSW incineration ashes from gas cleaning: New perspectives on recovery of secondary raw materials and circular economy

Municipal solid waste (MSW) incineration fly ash as an important source of heavy metal pollution in China.

Performance of chemical chelating agent stabilization and cement solidification on heavy metals in MSWI fly ash: A comparative study.

Effects of curing temperature on the compressive strength and microstructure of copper tailing-based geopolymers.

Stabilization of heavy metals in MSWI fly ash using silica fume.

The invention relates to method for stabilization of refuse incineration fly ash, which includes the following steps: 85 to 98 percent by weight of refuse incineration fly ash and 2 to 15 percent by weight of metakaolin are uniformly mixed, added with alkaline solution, in which the amount of added solid accounts for 1 to 10 percent of the total weight and the water-ash ratio is 0.2 to 0.45, constantly agitated, shaped, irradiated by microwaves for 1 to 5 minutes, naturally cured for 2 to 3 days and then watered to be naturally cured for 3 to 5 days, and thereby a finished product is obtained. The process flow is simple, the cost is low, the fly ash treatment capability is high, the operability is high, and a shaped brick can meet the requirement for MU10 standard strength, size and durability in GB/T5101-1998 and come up to the extraction toxicity standard, and can be used as a novel building material.

Method for stabilization of refuse incineration fly ash

The burning or accumulation of a large number of corn cobs in the countryside not only pollutes the environment but also takes up land, and it is of great significance to use agricultural solid waste to prepare green ecological construction materials for liveable villages. Therefore, in this study, the agricultural solid waste-corn cob is used as coarse aggregate, the recycled sand as fine aggregate, and industrial solid waste-mineral powder is used as cementitious material to prepare a green low carbon recycled concrete (LCRC). Regarding the alkali exciter concentrations, fine aggregate type and pre-wetting degree of aggregate as key variables, the time-varying laws of mechanical property, thermal insulation property, drying shrinkage property and CO2 emission of LCRC were studied. The results show that LCRC with a higher concentration of alkali exciter has better mechanical and thermal insulation properties, but poorer shrinkage properties. The mechanical property and shrinkage property of LCRC by manufactured sand are more excellent but poor insulation property. 80% pre-wetted LCRC has better mechanical and shrinkage properties, but lower thermal insulation property. The 28 days compressive strength and flexural strength of LCRC can reach up to 11.6 and 1.6 MPa. The bending compression ratio and 90 days shrinkage of LCRC are between 0.07 and 0.18 and 625.9∼977.7 × 10−6, which are comparable to or even better than normal concrete. The thermal conductivity of LCRC ranges from 0.108 to 0.300 W/(m·K) and can be used as a preparation insulation material. Meanwhile, LCRC can reduce carbon emissions by up to 31% than ordinary cement. 

Yang Yu

Papers

Stabilization of heavy metals in MSWI fly ash using silica fume.

Method for stabilization of refuse incineration fly ash

Study on preparation and performance of alkali-activated low carbon recycled concrete: corn cob biomass aggregate

Quantitative characterization of material uniformity and fatigue life reliability based on the initial damage discreteness