Transfer behaviour and durability of cementitious mortars containing polycarbonate plastic wastes

Hannawi, Kinda; Prince-Agbodjan, William

doi:10.1080/19648189.2014.960100

Cited by 19 publications

(7 citation statements)

References 30 publications

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“…The authors also observed that a higher content of EPS increased durability. Hannawi, Prince-Agbodjan [10] observed that the implementation of heat-cold cycles (12 hours at 20ºC and 12 hours at 65ºC, repeated 40 times), promoted an increase of the compressive and flexural strength, which may be due to the formation of new hydrates compounds during the ageing. The previous referred works do not make reference to the definition of the ageing cycles based on existing standard procedures.…”

Section: Degradation Mechanismsmentioning

confidence: 99%

“…This was owed to the humidification and subsequent action of negative temperatures with the formation of ice. Hannawi, Prince-Agbodjan [10] found that after the freeze-thaw cycles the mechanical strength decreased, which may be due to the degradation of the specimens owing to cracking and emergence of voids.…”

Section: Degradation Mechanismsmentioning

confidence: 99%

“…Regardless of the matrix and aggregates used in the mortar, accelerated ageing cycles are performed. A trend regarding temperatures is observed, being the temperature in the freezing period approximately -20°C and in the thawing period carried out at room temperature [7][8][9][10]. The lack of requirements in EN 998-1 [11] and the existing test methodology for onecoat mortars, according to EN 1015-21 [12], does not allow to classify and to show the added value of this type of systems, since they are multi-layer systems and should be evaluated as such.…”

Section: Introductionmentioning

confidence: 97%

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Assessment of test methods for the durability of thermal mortars exposure to freezing

2019

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Thermal mortars are a trend in the construction industry in recent years, owing to the required decrease of the thermal transmission of building envelopes. The high porosity of thermal mortars leads to permeability values that can affect their durability since it creates more favourable conditions for the penetration of aggressive agents. Water is observed as one of the most common and harmful degradation agents. Regarding the climatic variability in Europe, freezing is a usual degradation mechanism both in severe and moderate climates. Since thermal mortars have higher water absorption than a common insulation, the freezing may occur. As no durability assessment methodologies to evaluate the exposure of thermal mortars to freezing degradation mechanisms exist, the present work has the objective to analyse existing accelerated ageing procedures, which envisage freezing degradation mechanism. As such, the durability assessment described in EN 1015-21 and ETAG 004 was adapted and implemented in different thermal mortars. It was observed that the higher number of cycles and the severity of the freeze-thaw ageing cycles, according to ETAG 004, may reproduce the effect of the northern European climates, while the ageing cycles, described in EN 1015-21, combine

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Section: Degradation Mechanismsmentioning

confidence: 99%

Section: Degradation Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Assessment of test methods for the durability of thermal mortars exposure to freezing

2019

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“…Plastik atık içeren betonun kuru ve doygun birim hacim ağırlıklarının plastik atık agrega oranı arttıkça azaldığını belirtilmiştir [53]. Yapılan bir başka çalışmada ise, agrega olarak polikarbonatların ve PET atıkların dahil edilmesiyle harç ve betonun kuru ve doygun birim hacim ağırlığının azaldığı aktarılmıştır [54]. Bu sonuçlara göre, bir harç veya beton numunesinin birim hacim ağırlığındaki azalma, yapının toplam ağırlığını ve inşaat maliyetini azaltabilir.…”

Section: Kuru Ve Doygun Birim Hacim Ağılıklarıunclassified

Current Situation in the Evaluation of Plastic Wastes in Concrete

PEKER>¹,

Atas²,

Aksel³

2022

ALKÜ Fen Bilimleri Dergisi

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Nüfusun hızlı artışı ve elektronik, otomotiv, ambalaj gibi sanayi ürünlerinde kullanılan hammaddeler plastik kullanımına olan talebi her geçen yıl artırmaktadır. Endüstriyel olarak kullanımı faydalı olan plastik ürünlerin ekonomik ömrünün tükenmesiyle çevresel ortamda kirliliğe sebep olmaktadır. Atık haline gelen plastik ürünler çeşitli yöntemlerle yeniden değerlendirilerek çevre kirliliği azaltılmak istenmektedir. Bu değerlendirmelerin başında; yakılarak enerji üretimi ve geri dönüşüm ile yeni ürün üretimi gelmektedir. Ancak bu dönüşüm yapılsa bile %35-55 oranında ciddi bir miktar atık depolanmak zorunda kalmaktadır. Depolanan plastik hacminin beton üretiminde değerlendirilerek atık miktarının azaltılması son derece ideal bir çözüm olabilmektedir. Bu derleme makalesinde literatürde plastik atıkların betonda kullanımı ile ilgili çalışmalar incelenmiştir. İncelenen çalışmalar taze beton özellikleri, betonun mekanik özellikleri ve durabilite özellikleri olarak değerlendirilmiştir. Yapılan deneysel çalışmalarda farklı birçok plastik türü, mikro, makro boyutta ve lif olarak kullanılmıştır. Literatürdeki çalışmalar plastik türü, incelenen parametre ve beton performansına etkisi bakımından değerlendirilmiş ve sonuçlar kısmında verilmiştir. Bu konu hakkında çalışma yapan araştırmacılar için son derece faydalı bir derleme haline gelmiştir.

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“…In general, it is difficult to simulate all the degradation mechanisms and the way they interact together. In fact, a great amount of research studies evaluate the effect of temperature and moisture to perform the long-term ageing of building materials, since they are relevant parameters in the degradation of mortars [17][18][19]. Daniotti, Spagnolo [20] developed a specific ageing cycle, considering the specific conditions of a material/system application (as defined in Guidance Document 3 [21]).…”

Section: Introductionmentioning

confidence: 99%

A new durability assessment methodology of thermal mortars applied in multilayer rendering systems

Maia

Ramos

Veiga

2019

Construction and Building Materials

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The increase of the thermal resistance of building envelopes is a result from the growing demand of energy efficiency. Several new materials and systems emerged in recent years as an answer to that growing need. Thermal mortars applied in thermal rendering systems are an example of how the research community and the building industry try to tackle that challenge.A gap in the durability assessment of thermal rendering systems can however be observed. The existing standardization for the durability assessment of mortars does not allow a consistent evaluation of thermal mortars, especially in multilayer systems. As such, the main goal of the present work consists in proposing a durability assessment methodology of thermal mortars applied as multilayer systems. Accelerated ageing cycles, directly applicable to thermal mortars, were developed through numerical simulation, taking into account material properties, climatic conditions and consequent degradation mechanisms to which the system is subjected.A theoretical methodology for the determination of heat-cold cycles that can represent specific climatic conditions was developed. The implementation of the developed accelerated ageing cycles and the obtained experimental results contributed to the definition of a new durability assessment methodology. This methodology defines the accelerated ageing cycles that should be performed in each climate zone, representative of the main degradation mechanisms. One of the major advantages is the temperature adaption of the accelerated ageing cycles to the climatic conditions. The new methodology contributes to the evaluation of new solutions, during their development stage, and to their adequacy for specific climatic conditions.

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Transfer behaviour and durability of cementitious mortars containing polycarbonate plastic wastes

Cited by 19 publications

References 30 publications

Assessment of test methods for the durability of thermal mortars exposure to freezing

Assessment of test methods for the durability of thermal mortars exposure to freezing

Current Situation in the Evaluation of Plastic Wastes in Concrete

A new durability assessment methodology of thermal mortars applied in multilayer rendering systems

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