“…This indicated about 2.5% of penetration into a 6-mm-thick ceiling material which demonstrates an extremely weak penetration performance. 23 The majority of building materials containing asbestos remain in old constructions so there is a high possibility of wearing and damage and when considering the danger of damage caused by impacts in schools and crowded facilities, 20 an enhancement of stabilizer’s penetration performance is required, not only for the surfaces but also for the overall range of the materials. 30 Figure 5.EDS analyses results of cross section of ceiling materials treated with asbestos stabilizer for assessment of penetration depth.…”
Section: Resultsmentioning
confidence: 99%
“…16–18 This method has also the advantages that it can be directly applied in the field and it can be used as an alternative maintenance method to substitute for the dismantling process of asbestos-containing materials, while focusing on its safe and continuous use. 19–22…”
The effect of diluting asbestos stabilizer on its performance of suppressing the asbestos fibre release has been investigated in terms of its penetrability into ceiling materials containing asbestos fibres. The performance of a silicate stabilizer was determined for cases where the ceiling material was damaged by external factors. The higher dilution rate of the stabilizer resulted in lower viscosities and hence greater penetration depths into asbestos ceiling materials. In addition, for cases in which the diluted stabilizer was sprayed several times onto the ceiling materials, the released asbestos fibre concentration was shown to be reduced by approximately 89% compared to the case of damaged ceiling material. Furthermore, this held true in cases where treated ceiling materials were damaged. The optimum condition, considering both performance and efficiency, is for a stabilizer with distilled water to be applied onto the damaged asbestos ceiling materials several times.
“…This indicated about 2.5% of penetration into a 6-mm-thick ceiling material which demonstrates an extremely weak penetration performance. 23 The majority of building materials containing asbestos remain in old constructions so there is a high possibility of wearing and damage and when considering the danger of damage caused by impacts in schools and crowded facilities, 20 an enhancement of stabilizer’s penetration performance is required, not only for the surfaces but also for the overall range of the materials. 30 Figure 5.EDS analyses results of cross section of ceiling materials treated with asbestos stabilizer for assessment of penetration depth.…”
Section: Resultsmentioning
confidence: 99%
“…16–18 This method has also the advantages that it can be directly applied in the field and it can be used as an alternative maintenance method to substitute for the dismantling process of asbestos-containing materials, while focusing on its safe and continuous use. 19–22…”
The effect of diluting asbestos stabilizer on its performance of suppressing the asbestos fibre release has been investigated in terms of its penetrability into ceiling materials containing asbestos fibres. The performance of a silicate stabilizer was determined for cases where the ceiling material was damaged by external factors. The higher dilution rate of the stabilizer resulted in lower viscosities and hence greater penetration depths into asbestos ceiling materials. In addition, for cases in which the diluted stabilizer was sprayed several times onto the ceiling materials, the released asbestos fibre concentration was shown to be reduced by approximately 89% compared to the case of damaged ceiling material. Furthermore, this held true in cases where treated ceiling materials were damaged. The optimum condition, considering both performance and efficiency, is for a stabilizer with distilled water to be applied onto the damaged asbestos ceiling materials several times.
“…Asbestos has been used widely because of its durability characteristics and low maintenance cost (Jung et al, 2015). It is estimated that more than 90% of asbestos‐containing products consumed worldwide are used for the construction industry including asbestos‐containing building materials (ACBM) such as roof tiles, pipes, plates, floor tiles, water tanks, gutters, downspouts, and thermal insulators (Bonifazi et al, 2018; Jung et al, 2015; Kim & Hong, 2017; Mateo et al, 2013). Products containing more than 1% of asbestos in a cement matrix are commercially known as asbestos–cement products (Gualtieri, 2012; Paglietti et al, 2012).…”
Asbestos is a carcinogenic mineral banned in Colombia since 1 January 2021; however, there is a considerable amount of asbestos-containing building materials (ACBM) installed across the country in products such as roof tiles, tanks, pipes, and downspouts. Installed ACBM represent an exposure risk when the mineral fibers are released into the air through deterioration, damage, or disturbance of the cement matrix within which the asbestos is contained. Due to potential detrimental impacts on human health, safe management and correct handling of ACBM is a matter of vital importance. This article proposes evidence-based environmental management guidelines, aimed at public policymaking, for the removal and final disposal of installed ACBM in Colombia. A descriptive study was carried out, with a qualitative approach, based on an integrative literature review of international practices applied in the removal and disposal of installed ACBM. Forty scientific publications were reviewed, as well as the regulations for removal, transport, and final disposal of installed asbestos-cement from Australia, the USA, Italy, Chile, the UK, and Canada. Guidelines for the removal and final disposal of installed ACBM are proposed, suggesting the following stages: (a) diagnosis and management plan of installed ACBM, (b) removal of installed ACBM, (c) transport of ACBM waste, and (d) final disposal of ACBM waste. Expert opinion was collected to assess the local feasibility of the proposed guidelines. These guidelines may help direct national and regional agencies to establish comprehensive strategies with clear, measurable, and achievable goals for future replacement of installed ACBM.
“…Asbestos, a commercial term referring to six different silicate minerals (i.e., chrysotile, actinolite asbestos, amosite, anthophyllite asbestos, crocidolite, and tremolite asbestos), has been used as a building material since ancient times for its outstanding physical–chemical and technological properties. , Although the above-mentioned properties arise from its peculiar crystal habit (i.e., fibrous asbestiform), the latter is also responsible for severe health hazard, including pulmonary asbestosis, malignant mesothelioma and lung cancer, − so that asbestos has been included in Group 1 of carcinogens (i.e., carcinogenic for humans) by the IARC (International Agency for Research on Cancer)…”
This work addresses
the complex issue of asbestos containing materials
(ACMs) management, by focusing on the scenario of six municipalities
comprised in the Reggio Emilia province of Emilia Romagna Italian
region. Particularly, the life cycle assessment (LCA) methodology
was applied in order to assess in a quantitative and reliable manner
the human toxicity as well as the ecotoxicity impacts associated with
all of the different phases of ACMs management. The latter comprises
mapping of ACMs, creation of a risk map for defining priority of intervention,
encapsulation and removal of ACMs, as well as the as obtained asbestos
containing waste (ACW) end of life. Particularly, a thermal inertisation
treatment performed in a continuous industrial furnace was considered
as the innovative end of life scenario to be compared with what actually
was provided by the legislation of many countries worldwide, that
is, the disposal of ACW in a controlled landfill for hazardous wastes.
A characterization factor for asbestos fibers released both in outdoor
air and in occupational setting was proposed for the first time and
included in the USEtox 2.0 impact assessment method. This allowed
us to reliably and quantitatively highlight that inertisation treatments
should be the preferred solutions to be adopted by local and national
authorities, especially if the obtained inert material finds application
as secondary raw materials, thus contributing to a decrease in the
environmental damage (limited to its toxicological contributions)
to be associated with asbestos management.
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