Green materials for construction industry from Italian volcanic quarry scraps

被引：5

作者：

Altimari, F. ^{[1
]}

Lancellotti, I. ^{[1
]}

Leonelli, C. ^{[1
]}

Andreola, F. ^{[1
]}

Elsayed, H. ^{[2
]}

Bernardo, E. ^{[2
]}

Barbieri, L. ^{[1
,3
]}

机构：

[1] Univ Modena & Reggio Emilia, Dept Engn Enzo Ferrari, Via Vivarelli 10, I-41125 Modena, Italy

[2] Univ Padua, Dept Ind Engn, Via Marzolo 9, I-35131 Padua, Italy

[3] CRICT Interdept Res & Innovat Ctr Constructions &, Bergamo, Italy

来源：

MATERIALS LETTERS | 2023年 / 333卷

关键词：

Volcanic quarry scraps; Alkaline -activated materials; Lightweight materials; Geopolymers; Inorganic foams;

D O I：

10.1016/j.matlet.2022.133615

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Italian volcanic quarry scraps, with fine particle size and of little market interest, have been considered for the manufacturing of lightweight geopolymers and highly porous foams. Both powders have been alkali activated with NaOH solution at 8 M and 3 M, respectively.Geopolymers were characterized in terms of density, porosity, humidity absorption/desorption, mechanical strength and microstructure. All samples (with a bulk density of 1.5-1.6 g/cm3) exhibited a porosity of approximatively 35 vol% but featured a quite variable compressive strength (3-7 MPa), depending on the use of pumice or lapillus. The same quarry scraps were easily converted into highly porous foams (porosity of 75 vol%), by intensive mechanical stirring of alkali-activated suspensions, with the help of a surfactant.

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