Compatibility between ecocement produced from incinerator ash and reactive aggregates in ASR expansion of mortars

Torii, Kazuyuki; Tomotake, Hiroichi; Osafo, Ampadu Kwasi; Echigo, Takuya

doi:10.1016/s0008-8846(02)01023-2

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…Of further interest, a number of additional studies utilised combined ash (MIBA and fly ash) as part of the raw feed for cement clinker production (Kikuchi, 2001;Shih et al, 2003;Torii et al, 2003;Wiles and Shepherd, 1999).…”

Section: Use As a Cement Component In Concrete-related Applicationsmentioning

confidence: 99%

Municipal incinerated bottom ash use as a cement component in concrete

Lynn

Dhir

Ghataora

2017

Magazine of Concrete Research

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Section: Use As a Cement Component In Concrete-related Applicationsmentioning

confidence: 99%

Municipal incinerated bottom ash use as a cement component in concrete

Lynn

Dhir

Ghataora

2017

Magazine of Concrete Research

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“…The high energy and environmental costs associated with the cement manufacturing process [ 24 ] have led to the use of different measures to mitigate these negative effects. One of these measures is the use of new starting materials in the preparation of the cement raw mix, such as ceramic waste [ 25 ], incinerator ash [ 26 ], or crystallized slag [ 25 ]. Another measure is to use alternative fuels in the clinkering kilns, such as sewage sludge, animal meal, or agricultural residues [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

New Approach to Determine the Activity Concentration Index in Cements, Fly Ashes, and Slags on the Basis of Their Chemical Composition

et al. 2023

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The manufacture of Portland cement entails high energy and environmental costs, and various solutions have been implemented in recent years to mitigate this negative impact. These solutions include improvements in the manufacture of cement clinker or the use of supplementary cementitious materials (SCMs), such as fly ash (FA) or slag as a replacement for a portion of the clinker in cement. The incorporation of these SCMs in cement may increase its radiological content as they are naturally occurring radioactive materials (NORMs). The Activity Concentration Index (ACI) is a screening tool established in the European EURATOM Directive 2013/59 to determine the radiation protection suitability of a final construction material. The ACI is determined by the activity concentrations of 226Ra, 232Th and 40K, usually determined by gamma spectrometry. The methodology of gamma spectrometry is accurate and appropriate, but this technique is not available in all laboratories. For this reason, and taking into account that there is a relationship between the chemical and radiological composition of these building materials, a new approach is proposed to determine the radiological content of these materials from a chemical analysis such as X-ray fluorescence (XRF). In this paper, principal component analysis (PCA) is used to establish the relationships between the chemical composition and radiological content of cements, FAs, and slags of different natures. Through PCA it was possible to group the cements based on two variables: CaO content and Fe2O3–Al2O3–TiO2 content. A lower correlation was observed for the FAs and slags, as the sample scores were centered around the origin of the coordinates and showed greater dispersion than the cements. The clusters obtained in the HJ–Biplots allowed the determination, using multiple regression, of models relating the activity concentration of 226Ra, 232Th (212Pb), and 40K to the oxide percentages obtained for the three matrices studied. The models were validated using five cements, one FA and one slag with relative percentage deviations (RSD(%)) equal to or less than 30% for 89% of the activity concentrations and 100% of the ACI determined.

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“…Eco-cement, developed by Taiheiyo Cement Corporation in Japan [10,11], is an example of waste materials being employed as an alternative source of raw material. However, the production of cement consumes considerable amount of limestone, silica sand and clay, which will eventually have a negative effect on the environment due to the depletion of natural mineral resources.…”

Section: Introductionmentioning

confidence: 99%

“…Since the exhaustion of suitable natural materials in certain areas increased, substituting raw materials with industrial and other waste materials becomes the current interest by cement producers. Eco-cement, developed by Taiheiyo Cement Corporation in Japan [10,11], is an example of waste materials being employed as an alternative source of raw material. Ecocement is a novel type of cement produced by adding limestone and clay to municipal incineration ash and sewage sludge.…”

Section: Introductionmentioning

confidence: 99%

Hydration characteristics of cement for co‐sintered from washed‐fly ash and waste sludge

Lin

Shie

et al. 2014

Env Prog and Sustain Energy

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The purpose of this study is to co‐sinter washed‐fly ash, limestone sludge, stone sludge, and iron‐oxide sludge to fabricate 4 types of eco‐cement clinkers. The compound raw materials were burned for 2 h at 1400°C to form the eco‐cement clinkers, all of which met the toxicity characteristic leaching procedure requirements. The results show that the major components of ordinary Portland cement (OPC), C3S, C2S, C3A, and C4AF, were present in the eco‐cement clinkers. The compressive strength development indicated that the EcoA pastes were similar to those of commercial OPC products. The compressive strength in the EcoG pastes decreased because of the amount the α‐C2S increased. The mercury intrusion porosimetry results showed that the pore volume in the pastes gradually decreased when the curing time increased. Additionally, from the X‐ray diffraction results, all the eco‐cements produced Ca(OH)2 during hydration, which also increased with curing age. The scanning electron microscopy images of OPC and EcoA pastes showed that the pore volume decreased and the denser structural increased with the curing time increased. In addition, adding higher amounts of 1% washed‐fly ash caused to increase the content of α‐C2S. The result show that this co‐sintered process from 1% washed‐fly ash and 99% waste sludge (77% limestone sludge, 19.51% stone sludge and 2.49% iron‐oxide sludge) to produce eco‐cement with excellent mechanical characteristics. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 964–972, 2015

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Compatibility between ecocement produced from incinerator ash and reactive aggregates in ASR expansion of mortars

Cited by 9 publications

References 7 publications

Municipal incinerated bottom ash use as a cement component in concrete

Municipal incinerated bottom ash use as a cement component in concrete

New Approach to Determine the Activity Concentration Index in Cements, Fly Ashes, and Slags on the Basis of Their Chemical Composition

Hydration characteristics of cement for co‐sintered from washed‐fly ash and waste sludge

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