Influence of acrylic latex and pre-treated hemp fibers on cement based mortar properties

Candamano, Sebastiano; Crea, F.; Coppola, Luigi; Luca, Pasquale De; Coffetti, Denny

doi:10.1016/j.conbuildmat.2020.121720

Cited by 38 publications

(25 citation statements)

References 50 publications

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“…A key parameter to predict or to control the final thermal behavior could be the dispersion of the fibers, which is influenced by the fiber length and dosage and the fiber-matrix bond. As also reported in the literature [85], several processes contribute to the interaction at the fiber-matrix interface, such as fiber mineralization, fiber degradation, and fiber volume change due to water absorption. Considering the morphological structure of hemp fibers by scanning electron microscopy, as reported in several papers [86], the untreated fibers (as in the present study) are rough because these have a lot of compounds at the surface covered with fats, waxes, or polysaccharides.…”

Section: Discussion Of the Experimental Resultssupporting

confidence: 64%

Assessment of Mechanical and Thermal Properties of Hemp-Lime Mortar

Parcesepe

Masi

Lima³

et al. 2021

Materials

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The use of renewable and natural materials characterized by the low environmental impact is nowadays a key issue for the sustainable development of the construction industry. For this reason, the interest for natural fibers, to be used as reinforcement in composites as an alternative to other fibers, is continuously growing. In this paper, the use of hemp for reinforcing lime mortar used as plaster is considered with a multidisciplinary approach, taking into consideration the structural and thermal performance. Natural fibers have several advantages compared to industrial ones, such as low cost, low environmental impact, biodegradability, renewable nature. Moreover, these can show remarkable mechanical performance in relation to specific weight, and sometimes, as in the case of hemp fibers, these can improve the thermal insulation capacity of the plaster. However, the experimental results on the mechanical features are still lacking, especially to assess their durability, and the variability of thermal parameters with the mechanical characteristics. Therefore, this paper proposes an experimental program, developed at Laboratory of Materials and Structures (LAMAS) of the University of Sannio (Italy), aimed at investigating the main mechanical properties (compression strength, flexural strength) of lime mortar reinforced by hemp fibers and subjected to various environmental exposures and aging processes. The characterization is completed with the measurement for the produced samples of the thermal conductivity by means of the standardized guarded hot plate technique.

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Section: Discussion Of the Experimental Resultssupporting

confidence: 64%

Assessment of Mechanical and Thermal Properties of Hemp-Lime Mortar

Parcesepe

Masi

Lima³

et al. 2021

Materials

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“…Although relying on biopolymers can result in less than ideal features, in respect to conventional plastics, bio-composite materials are crucial for research developments and for widening the application fields (Luca et al 2017). Polymer composites are produced combining natural textile (basalt, carbon),natural fibers (jute, kenaf, hemp and sisal),-fillers (clays, zeolite, graphene) commonly used in many traditional application (Candamano et al 2021(Candamano et al , 2020, with polymers (Mohammed et al 2015;Candamano et al 2017), which can be chosen to be biodegradable (Rouf and Kokini 2016;Díez-Pascual 2019). Re-inforced biocomposites include recycled wood fibers or by-products from food crops harvesting.…”

Section: Other Applicationsmentioning

confidence: 99%

Bioplastic from Renewable Biomass: A Facile Solution for a Greener Environment

et al. 2021

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Environmental pollutions are increasing day by day due to more plastic application. The plastic material is going in our food chain as well as the environment employing microplastic and other plastic-based contaminants. From this point, bio-based plastic research is taking attention for a sustainable and greener environment with a lower footprint on the environment. This evaluation should be made considering the whole life cycle assessment of the proposed technologies to make a whole range of biomaterials. Bio-based and biodegradable bioplastics can have similar features as conventional plastics while providing extra returns because of their low carbon footprint as long as additional features in waste management, like composting. Interest in competitive biodegradable materials is growing to limit environmental pollution and waste management problems. Bioplastics are defined as plastics deriving from biological sources and formed from renewable feedstocks or by a variation of microbes, owing to the ability to reduce the environmental effect. The research and development in this field of bio-renewable resources can seriously lead to the adoption of a low-carbon economy in medical, packaging, structural and automotive engineering, just to mention a few. This review aims to give a clear insight into the research, application opportunities, sourcing and sustainability, and environmental footprint of bioplastics production and various applications. Bioplastics are manufactured from polysaccharides, mainly starch-based, proteins, and other alternative carbon sources, such as algae or even wastewater treatment byproducts. The most known bioplastic today is thermoplastic starch, mainly as a result of enzymatic bioreactions. In this work, the main applications of bioplastics are accounted. One of them being food applications, where bioplastics seem to meet the food industry concerns about many the packaging-related issues and appear to play an important part for the whole food industry sustainability, helping to maintain high-quality standards throughout the whole production and transport steps, translating into cleaner and smarter delivery chains and waste management. High perspectives resides in agricultural and medical applications, while the number of fields of applications grows constantly, for example, structural engineering and electrical applications. As an example, bio-composites, even from vegetable oil sources, have been developed as fibers with biodegradable features and are constantly under research.

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“…Traditional polymeric coatings have always been widely used in the construction sector. The main categories of polymeric coatings are epoxy resins [18][19][20], acrylics [21][22][23] and polyurethanes [24][25][26], each of them with their own strengths and weaknesses as reported in Table 1. They exert their protective ability by increasing the resistance against aqueous solutions penetration due to a barrier effect.…”

Section: Available Surface Treatmentsmentioning

confidence: 99%

Protection of Concrete Structures: Performance Analysis of Different Commercial Products and Systems

et al. 2021

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The increasing demand for reconstructions of concrete structures and the wide availability on the market of surface protective products and systems could lead to misunderstandings in the decision of the most effective solution. Surface protectors have become increasingly widespread in recent years in concrete restoration interventions thanks to their properties: they are able to protect the substrate from aggressive agents and consequently extend the useful life of the structures. The aim of this article is first of all to present the surface protective treatments available on the market, outlining their strengths and weaknesses. Subsequently, a characterization of seven different commercial coatings for reinforced-concrete structures is provided, taking into account chemical nature, fields of use and effectiveness, both in terms of physic and elastic performance and resistance to aggressive agents that undermine the durability of the treated concrete elements.

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Influence of acrylic latex and pre-treated hemp fibers on cement based mortar properties

Cited by 38 publications

References 50 publications

Assessment of Mechanical and Thermal Properties of Hemp-Lime Mortar

Assessment of Mechanical and Thermal Properties of Hemp-Lime Mortar

Bioplastic from Renewable Biomass: A Facile Solution for a Greener Environment

Protection of Concrete Structures: Performance Analysis of Different Commercial Products and Systems

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