Effect of thermal treatment on the retention of chemical elements in the structure of lightweight aggregates manufactured from contaminated mine soil and fly ash

González-Corrochano, Beatríz; Alonso-Azcárate, Jacinto; Rodas, M.

doi:10.1016/j.conbuildmat.2012.04.061

Cited by 49 publications

(16 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in accordance with previous research by Gonzalez-Corrochano et al They stated that higher sintering temperature reduces the bulk density of ALWA, and resulting in lower density of concrete produced [16].…”

Section: Physical Properties Of Concretesupporting

confidence: 82%

Effect of the Use of Metakaolin Artificial Lightweight Aggregate on the Properties of Structural Lightweight Concrete

Risdanareni¹,

Choiri²,

Djatmika³

et al. 2017

ced

View full text Add to dashboard Cite

This paper investigates the effect of using metakaolin Artificial Lightweight Aggregates (ALWA) as a substitute for coarse aggregates to produce structural lightweight concrete. A combination of 10M NaOH solution and sodium silicate solution was used as alkali activator. The ratio between the metakaolin binder and the alkali activator used in producing metakaolin ALWA is 48%:52%, by mass. It is shown that metakaolin ALWA has higher abrasion and water absorption, and lower bulk density values compared to normal aggregates. To determine the effect of using metakaolin ALWA as coarse aggregates in concrete, three variations of ALWA dosages were used, i.e. 0%, 50%, and 100% of the total coarse aggregates, by volume. The results show that the compressive strength of concrete decreased along with the increase of ALWA content in the mixture. However, concrete using 100% ALWA as coarse aggregates meets the requirements of compressive strength and density of structural light weight concrete.

show abstract

Section: Physical Properties Of Concretesupporting

confidence: 82%

Effect of the Use of Metakaolin Artificial Lightweight Aggregate on the Properties of Structural Lightweight Concrete

Risdanareni¹,

Choiri²,

Djatmika³

et al. 2017

ced

View full text Add to dashboard Cite

show abstract

“…Since the treatments of co-contaminated soils are limited, it is widely agreed that multiple costly techniques are required (Khan et al 2004). A number of investigations have shown that thermal treatment (thermal desorption, incineration, pyrolysis, gasification, and vitrification) is one of the effective processes for complex substances remediation (González-Corrochano et al 2012;Qi et al 2014;Qin et al 2015;Taube et al 2008;Van Caneghem et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of co-contaminated soil mixtures as fixed/fluidized bed media on pollutants emission under thermal treatment

Samaksaman

Kuo

Peng

et al. 2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Thermal treatment of soil polluted by lube oil and heavy metals (cadmium, chromium, copper, and lead) was carried out by using a laboratory-scale incinerator. The effect of co-contaminated soil mixtures as fixed/fluidized bed media was studied with different ratios of sand bed amount to soil feeding. Additionally, the effect of soil moisture content on incineration system was further investigated. The reduction in air input altered the mode of fluidized bed to fixed bed which resulted in an increase in organic pollutants such as benzene, toluene, ethylbenzene, xylene, and polycyclic aromatic hydrocarbons. The combustion efficiency of fixed bed mode was observed to be relatively high at a lower ratio of sand bed amount to soil feeding, whereas high combustion efficiency was found in fluidized bed mode at a higher ratio of sand bed amount to soil feeding. Much higher concentration of organic pollutants in both gas phase and bottom ash is found under a higher soil moisture content. In addition, the increase in moisture content has resulted in an increase in lead, cadmium, and chromium in fly ash while copper was decreased. An important consideration is that the partitioning of heavy metals was randomly distributed in particle sizes of bottom ash. The highest concentration of heavy metals was deposited on fine-sized particle. The distribution of heavy metals in medium-sized and coarse-sized particles to form eutectic species might be produced by the soil-sand aggregation.

show abstract

“…Predecessors (e.g., [8][9][10][11][12]) had done research on the utilization of fly-ash, and some beneficial conclusions were obtained. In general, previous scholars' research showed that fly-ash utilization research usually focuses on using fly-ash as the solely material for embankment filling, while research on the combination of FMLS and fly-ash for embankment filling is less.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Foamed Mixture Lightweight Soil Mixed with Fly-Ash and Quicklime as Backfill Material behind Abutments of Expressway Bridge

Liu

Sheng

et al. 2017

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

To promote the utilization of fly-ash, based on the orthogonal experiment method, wet density and unconfined compressive strength of Foamed Mixture Lightweight Soil mixed with fly-ash and quicklime (FMLSF) are studied. It is shown that the wet density and unconfined compressive strength of FMLSF increase with the increase of cement content, while decreasing with the increase of foam content. With the mixing content of fly-ash increase, the wet density and unconfined compressive strength of FMLSF increase firstly and then decrease. Scanning Electron Microscope (SEM) tests show that ball effect or microaggregate effect of fly-ash improves the wet density and unconfined compressive strength of FMLSF. With the mixing content of quicklime increase, the wet density and unconfined compressive strength of FMLSF increase firstly within a narrow range and then decrease. In addition, the primary and secondary influence order on wet density and 28-day compressive strength of FMLSF are obtained, as well as the optimal mixture combination. Finally, based on two abutments in China, behind which they are filled with FMLSF and Foamed Mixture Lightweight Soil (FMLS), the construction techniques and key points of quality control behind abutment are compared and discussed in detail, and the feasibility of utilization fly-ash as FMLSF is verified by the experimental results.

show abstract

Effect of thermal treatment on the retention of chemical elements in the structure of lightweight aggregates manufactured from contaminated mine soil and fly ash

Cited by 49 publications

References 36 publications

Effect of the Use of Metakaolin Artificial Lightweight Aggregate on the Properties of Structural Lightweight Concrete

Effect of the Use of Metakaolin Artificial Lightweight Aggregate on the Properties of Structural Lightweight Concrete

Effect of co-contaminated soil mixtures as fixed/fluidized bed media on pollutants emission under thermal treatment

Experimental Research on Foamed Mixture Lightweight Soil Mixed with Fly-Ash and Quicklime as Backfill Material behind Abutments of Expressway Bridge

Contact Info

Product

Resources

About