Effects of silica fume and Fly ash on properties of mortar reinforced with recycled-polypropylene

Chen, Haiming; Chen, Qian; Xu, Yangchen; Lawi, Abubakar.S.

doi:10.1016/j.conbuildmat.2021.125887

Cited by 15 publications

(4 citation statements)

References 28 publications

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“…So far, it has been well established that FA contributes to the following: (i) reduces heat development at an early age [1], (ii) slows down the rate of hydration (pozzolanic reaction) [2], (iii) induces improved workability as a result of the rounded shape of FA particles [3], (iv) provides a higher long-term age strength by converting the calcium hydroxide into calcium silicate hydrate gel (C-S-H) [4], and (v) ensures a low permeability, i.e., it can reduce chloride ingress, thereby making concrete more durable [5]. As a result of a denser structure and the increase of the non-evaporable water content, Chen et al [6] suggest that the fly ash-based concrete exhibits lower drying shrinkage than the traditional concrete.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Natural Zeolite as Fly Ash Alternative on Frost Resistance and Shrinkage of Blended Cement Mortars

et al. 2022

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As the cement industry is responsible for 7% of the global CO2 emissions, locally and abundantly available materials are vastly valorized, and their use is assuming a significant role in this domain. Over the last few decades, significant research in the development of supplementary cementitious materials (SCMs) derived from industrial wastes, such as fly ash (FA), has been conducted. However, facing environmental pressures, coal power plants are closing across the planet. Hence there is an urgent need to identify sustainable SCMs that can replace FA in the concrete industry. Furthermore, the usage of FA in cement-based composites does not often produce satisfactory results from the aspect of certain properties, such as freeze–thaw durability. Therefore, the application of natural zeolites (NZs) for these purposes has emerged as an area of interest in the civil engineering practice. This paper presents the results of experimental research regarding the influence of NZ, as a mineral admixture, on the basic physical and mechanical properties of cement mortars, with a focus on frost resistance and drying shrinkage. The amount of NZ was varied from 10 to 30% in relation to cement mass. The findings indicate that NZ positively influences the drying shrinkage reduction regardless of the replacement level, while the best results concerning frost resistance can be achieved in cement blends with 10% NZ.

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Section: Introductionmentioning

confidence: 99%

The Effects of Natural Zeolite as Fly Ash Alternative on Frost Resistance and Shrinkage of Blended Cement Mortars

et al. 2022

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“…The Institute of Energy and Environment (IEMA) highlights that global CO2 emissions had the second largest increase in history in 2021, at 1.5 billion tons (IEMA, 2021). In this context, there is a need to invent recycling and reuse of these petroleum-based compounds, such as propylene (Chen et al, 2022). Figure 11 complements, through a Pareto diagram, that propylene presents the greatest negative externalities on the environment and human health (responsible for 52% of the impacts).…”

Section: Life Cycle Analysis (Lca)mentioning

confidence: 95%

Analysis of the application of recycled polypropylene

Kohlbeck,

Beuren,

Santos

2023

BJO&PM

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Goal: Analyze the benefits of the application of recycled polypropylene in the evaporation tray of refrigerators in a multinational company of electro-electronic equipment. Design / Methodology / Approach: This research conducts a systematic literature review; performs a Life Cycle Analysis (LCA) of the polypropylene production, interpreting its results through a Pareto Diagram; and presents a case study in a multinational company of white line electro-electronic equipment. Results: The LCA results point out that propylene and the components released by the chemical plant cause the main negative externalities under the environment and human health, so that during PP production, propylene is responsible for 72% of the impacts under global warming and 86% in the face of scarcity of fossil resources. Thus, the case study proposes recycling polypropylene, following the Circular Economy guidelines by aligning the proposal with the Zero Waste policy, with modular design, with Reverse Logistics, and with Sustainable Development Goals. Research limitations: The work presents limitations inherent to literature review works, where filters are used to limit the search (limited to articles, published between 2012 and 2021 and written in English). Practical implications: The research encourages recycling, pointing out its contribution under the environmental, social and economic spheres. Originality / Value: The research presents originality and methodological value by combining qualitative and quantitative methods, and a theoretical and practical approach. Thus, it was possible to implement the research in the multinational company analyzed, and to measure the benefits obtained.

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“…Bundan başka, lif katkılarının kayma mukavemetini %3,0 ile %21,0 arasında değişen oranlarda arttırdığı ve doğal zeminde donma-çözülme döngüsü nedeniyle yaklaşık %80 civarında dayanım kaybı meydana geldiği belirlenmiştir. Ayrıca, uçucu kül ve sentetik lif katkılarının donma-çözülme döngülerinin neden olduğu dayanım kaybını telafi ederek kayma dayanımını artırabileceği belirtilmiştir [90].…”

Section: Polipropilen (Pp) Liflerunclassified

Dinamik Üç Eksenli Test Sistemi ile Zeminlerin Dinamik Parametrelerinin Belirlenmesi

Güler

2023

Geoteknik Mühendisliğinde Yenilikçi Araştırmalar

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Deprem bölgelerinde yer alan yapıların güvenli bir şekilde tasarlanabilmesi için, bölgesel zemin koşullarının dinamik parametrelerinin titizlikle belirlenmesi ve bu parametrelerin tasarım hesaplamalarında kullanılması büyük bir öneme sahiptir. Bu, inşaat mühendisliği açısından kritik bir adımdır, çünkü zeminlerin dinamik özelliklerinin doğru bir şekilde tespit edilmesi, deprem etkileri altında yapıların davranışını daha kesin bir şekilde anlamamıza yardımcı olmaktadır. Bu süreç, yapısal güvenlik standartlarını karşılayan ve deprem etkilerine karşı dirençli olan yapıların tasarımında temel bir unsur olarak öne çıkar. Bu nedenle zeminlerin yüksek deformasyon seviyelerinde dinamik parametrelerinin belirlenmesinde dinamik üç eksenli deney sistemi (TRX) kullanılmaktadır. Elde edilen veriler ile deprem anında zemin davranışı belirlenir ve tasarımlarda kullanılır. Burada dinamik kayma modülü-birim şekil değiştirme ve sönüm oranı eğrileri elde edilmektedir. Bu çalışmada örselenmiş numuneler üzerinde TRX deney sistemi kullanılarak farklı çevre basınçları altında deneyler yapılmıştır. Yapılan deneylerde yükleme frekansı 1Hz olarak belirlenmiş ve her yüklemede 10 döngü yapılarak numunenin göçmesi sağlanmıştır. Elde edilen sonuçlarda çevre basıncının dinamik parametrelere etkisi incelenmiştir. Çevre basıncı arttıkça numune daha rijit bir durumda olmakta ve dayanım değerlerini etkilediği belirlenmiştir.

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Effects of silica fume and Fly ash on properties of mortar reinforced with recycled-polypropylene

Cited by 15 publications

References 28 publications

The Effects of Natural Zeolite as Fly Ash Alternative on Frost Resistance and Shrinkage of Blended Cement Mortars

The Effects of Natural Zeolite as Fly Ash Alternative on Frost Resistance and Shrinkage of Blended Cement Mortars

Analysis of the application of recycled polypropylene

Dinamik Üç Eksenli Test Sistemi ile Zeminlerin Dinamik Parametrelerinin Belirlenmesi

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