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Giuseppina Roviello
University of Naples Federico II
Organic chemistryChemistryGeopolymerPhotochemistryLigand
71Publications
18H-index
956Citations
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Publications 68
Newest
#1Laura Ricciotti (University of Naples Federico II)H-Index: 12
#2Alessio Occhicone (University of Naples Federico II)
Last. Giuseppina Roviello (University of Naples Federico II)H-Index: 18
view all 6 authors...
Abstract The construction industry causes significant environmental impacts in terms of global warming and embodied energy consumption. Concrete is one of the most widely used product in the planet. The development of new materials as alternative to cement could lay the foundations for introducing on the market innovative systems with higher performances and lower environmental impacts. The present research investigates, through a life cycle approach, the environmental impacts of the production ...
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#1Giuseppina RovielloH-Index: 18
#2Elena ChianeseH-Index: 1
Last. Oreste TaralloH-Index: 18
view all 7 authors...
For the first time, hybrid organic–inorganic geopolymeric foams were successfully used as monolithic adsorbents for the removal of metallic ions pollutants from wastewaters. The foams were realized by the in situ foaming of a hybrid geopolymer obtained by a reaction of metakaolin and polysiloxane oligomers under strong alkaline conditions and then cured at room temperature. In this way, porous materials with densities ranging from 0.4 to 0.7 g/cm3 and showing good mechanical properties were prod...
1 CitationsSource
#1Giuseppina RovielloH-Index: 18
#2Laura RicciottiH-Index: 12
Last. Oreste TaralloH-Index: 18
view all 7 authors...
The preparation and characterization of innovative organic-inorganic hybrid geopolymers, obtained by valorizing coal fly ash generated from thermoelectric power plants, is reported for the first time. These hybrid materials are prepared by simultaneously reacting fly ash and dimethylsiloxane oligomers at 25 °C in a strongly alkaline environment. Despite their lower density, the obtained materials are characterized by highly improved mechanical properties when compared to the unmodified geopolyme...
2 CitationsSource
#1Barbara Liguori (University of Naples Federico II)H-Index: 15
#2Paolo Aprea (University of Naples Federico II)H-Index: 11
Last. Claudio Ferone (University of Naples Federico II)H-Index: 22
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Abstract Many industrial applications need supporting or shaping powdery zeolites. Since geopolymers can be considered the amorphous counterpart or precursors of crystalline zeolites, it is possible to promote zeolite crystallization inside the geopolymeric matrix by tuning pH, temperature and time of the geopolymerization reaction. In this paper, combining zeolite crystallization with a foaming process initiated by silicon, a multifunctional self-supporting zeolitic material has been obtained w...
1 CitationsSource
#1Claudio FeroneH-Index: 22
#2Ilaria Capasso (National Research Council)H-Index: 1
Last. Raffaele CioffiH-Index: 28
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Abstract Alumina-containing water potabilization sludge (WPS) is one of the main wastes produced by reservoir management activities. This kind of residues, deriving from treatment processes for water potabilization, recently attracted great attention as starting raw material in the production of innovative building materials. In this study, the use of WPS as aluminosilicate source for the synthesis of geopolymers has been investigated. In particular, two different potabilization sludge deriving ...
1 CitationsSource
#1Luigi Coppola (University of Bergamo)H-Index: 14
#2Tiziano Bellezze (Marche Polytechnic University)H-Index: 14
Last. Fan Yang (Polytechnic University of Milan)H-Index: 2
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This review presents “a state of the art” report on sustainability in construction materials. The authors propose different solutions to make the concrete industry more environmentally friendly in order to reduce greenhouse gases emissions and consumption of non-renewable resources. Part 1—the present paper—focuses on the use of binders alternative to Portland cement, including sulfoaluminate cements, alkali-activated materials, and geopolymers. Part 2 will be dedicated to traditional Portland-f...
18 CitationsSource
#1Luigi Coppola (University of Bergamo)H-Index: 14
#2Tiziano Bellezze (Marche Polytechnic University)H-Index: 14
Last. Fan Yang (Polytechnic University of Milan)H-Index: 2
view all 63 authors...
The paper represents the “state of the art” on sustainability in construction materials. In Part 1 of the paper, issues related to production, microstructures, chemical nature, engineering properties, and durability of mixtures based on binders alternative to Portland cement were presented. This second part of the paper concerns the use of traditional and innovative Portland-free lime-based mortars in the conservation of cultural heritage, and the recycling and management of wastes to reduce con...
15 CitationsSource
#1Francesco ColangeloH-Index: 26
#2Giuseppina RovielloH-Index: 18
Last. Christopher R. Cheeseman (Imperial College London)H-Index: 37
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Abstract This research has investigated the properties of thermally insulating geopolymer composites that were prepared using waste expanded polystyrene as lightweight aggregate. The geopolymer matrix was synthetized using metakaolin and an alkaline activating solution. To improve its mechanical properties, this matrix was modified by the addition of an epoxy resin to form an organic-inorganic composite. Moreover, in order to reduce drying shrinkage marble powder was used as an inert filler. The...
16 CitationsSource
#1Laura RicciottiH-Index: 12
#2Antonio MolinoH-Index: 20
Last. Giuseppina RovielloH-Index: 18
view all 6 authors...
A new class of geopolymer composites, as materials alternative to traditional binders, was synthesized and its potentialities as restoration material in Cultural Heritage has been explored. This material has been prepared through a co-reticulation reaction in mild conditions of a metakaolin-based geopolymer inorganic matrix and a commercial epoxy resin. The freshly prepared slurry displays a consistency, workability and thixotropic behavior that make it suitable to be spread on different substra...
1 CitationsSource
#1Francesco ColangeloH-Index: 26
#2Raffaele CioffiH-Index: 28
Last. Claudio FeroneH-Index: 22
view all 8 authors...
Abstract In this paper fly ash based geopolymer mortars have been prepared and their thermal behavior evaluated in order to assess the suitability of fly ash based alkali-activated binders for thermal energy storage in solar thermal plants. Different parameters, such as binder/aggregate ratio, percentage of fly ash replaced by slag, temperature and curing time, have been changed and optimized using the Design Of Experiments (DOE) approach. In order to estimate the thermal cycling stability of ge...
13 CitationsSource
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