Thermo-acoustic properties of cement-waste-glass mortars

Petrella, Andrea; Petrella, Mario; Boghetich, G.; Petruzzelli, Domenico; Ayr, Ubaldo; Stefanizzi, Pietro; Calabrese, D.; Pace, L.; Guastamacchia, M.

doi:10.1680/coma.2009.162.2.67

Cited by 18 publications

(17 citation statements)

References 13 publications

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“…Thus, EPS3 is the specimen with the lowest water drop absorption. This may be due to a more efficient organization of the aggregate particles with open spaces (spheroidal microcavities) between larger particles filled with smaller size EPS beads [49,66], which leads to better behavior of the composite. This specimen indeed shows the highest specific mass and lowest porosity among the EPS specimens, reasonably as a consequence of a better aggregate compaction (evidenced by the lowest flow).…”

Section: Resultsmentioning

confidence: 99%

“…The reference was prepared with normalized sand [46] and named Normal. EPS was added into the conglomerate with a partial or complete replacement of the standard sand aggregate which was made on volume basis rather than on weight basis [48][49][50] due to the low specific mass of polystyrene. The samples (excluding the Normal) were prepared with a volume of aggregate of 500 cm 3 .…”

Section: Preparation Of the Mortarsmentioning

confidence: 99%

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Recycled Expanded Polystyrene as Lightweight Aggregate for Environmentally Sustainable Cement Conglomerates

2020

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In the present work the rheological, thermo-mechanical, microstructural, and wetting characteristics of cement mortars with recycled expanded polystyrene (EPS) were analyzed. The samples were prepared after partial/total replacement of the conventional sand aggregate with EPS having different grain size and size distribution. Lightness and thermal insulation were relevant features for all the bare EPS composites, despite the mechanical strengths. Specifically, EPS based mortars were characterized by higher thermal insulation with respect to the sand reference due to the lower specific mass of the specimens mainly associated with the low density of the aggregates and also to the spaces at the EPS/cement paste interfaces. Interesting results in terms of low thermal conductivity and high mechanical resistances were obtained in the case of sand-EPS mixtures although characterized by only 50% in volume of the organic aggregate. Moreover, sand-based mortars showed hydrophilicity (low WCA) and high water penetration, whereas the presence of EPS in the cement composites led to a reduction of the absorption of water especially on the bulk of the composites. Specifically, mortars with EPS in the 2–4 mm and 4–6 mm bead size range showed the best results in term of hydrophobicity (high WCA) and no water penetration in the inner surface, due to low surface energy of the organic aggregate together with a good particle distribution. This was indicative of cohesion between the ligand and the polystyrene as observed in the microstructural detections. Such a property is likely to be correlated to the observed good workability of this type of mortar and to its low tendency to segregation compared to the other EPS containing specimens. These lightweight thermo-insulating composites can be considered environmentally sustainable materials because they are prepared with no pre-treated secondary raw materials and can be used for indoor applications.

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Section: Resultsmentioning

confidence: 99%

Section: Preparation Of the Mortarsmentioning

confidence: 99%

Recycled Expanded Polystyrene as Lightweight Aggregate for Environmentally Sustainable Cement Conglomerates

2020

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“…Specifically, the reference materials showed lower thermal conductivities with respect to the conventional (sand containing) mortars which were assumed as the control [26,27]. Reduction of average λ figures (0.39 vs. 2.06 W/mK) was attributed to the peculiar thermal insulating properties of the perlite after the open and closed porosity present on the material limiting heat transport in the silica lattice (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Porous Alumosilicate Aggregate as Lead Ion Sorbent in Wastewater Treatments

et al. 2017

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Porous alumosilicate aggregate, namely perlite, was used as an alternative material in wastewater treatments for the selective removal of ionic pollutants such as lead which is present in industrial wastewaters and toxic at relatively low concentrations. Metal retention was investigated by single metals and multispecies equilibrium isotherms (batch system) and by carrying out dynamic (column) experiments. Lead ions were supposedly preferentially retained by ion exchange at the negatively charged silicate functional groups present on the perlite material, and to a minor extent by weak electrostatic (Van der Waals) interactions at non-specific functionalities. In the case of the batch system, the Freundlich isotherm gave a good correlation of the experimental data and lead maximum retention (q max ) in single ion solution was 4.28 mg/g perlite , and in multimetal solution was 1.50 mg/g perlite . In the case of the column system, overall capacity was 3.7 mg/g perlite in single ion solution, and in multimetal solution was 3.0 mg/g perlite . In multimetal solutions, lead ions showed the best interaction at the perlite functional groups because of the lowest free energies of hydration and hydrated radius. After sorption, perlite beads were used as lightweight aggregates for cement mortars after evaluation of the potential release of lead ions from the conglomerates.

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“…The principles demonstrated by this study, enabling significantly improved block strength whilst using a waste product, will find applications well beyond the authors' native India. The theme of obtaining materials improvements whilst consuming waste products is continued in the next paper, by Petrella et al 3 from Italy, in which recycled waste glass is found to be a versatile granular material for use in cementitious mortars. Micropore structure (see cover image) of the recycled waste glass led to lightweight mortars with enhanced thermal and acoustic properties.…”

Section: Simsmentioning

confidence: 95%

Editorial

Sims¹

2009

Proceedings of the Institution of Civil Engineers - Constructio

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Thermo-acoustic properties of cement-waste-glass mortars

Cited by 18 publications

References 13 publications

Recycled Expanded Polystyrene as Lightweight Aggregate for Environmentally Sustainable Cement Conglomerates

Recycled Expanded Polystyrene as Lightweight Aggregate for Environmentally Sustainable Cement Conglomerates

Porous Alumosilicate Aggregate as Lead Ion Sorbent in Wastewater Treatments

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