Waste olivine and silica sands boost geopolymers’ performances: experimental investigation

被引：2

作者：

Furlani E. ^{[1
]}

Magnan M. ^{[1
]}

Mingone E. ^{[1
]}

Deison M. ^{[1
]}

Aneggi E. ^{[1
]}

Andreatta F. ^{[1
]}

Fedrizzi L. ^{[1
]}

Maschio S. ^{[1
]}

机构：

[1] Polytechnic Department of Engineering and Architecture, University of Udine, Udine

来源：

International Journal of Environmental Studies | 2019年 / 76卷 / 03期

关键词：

compressive strength; Geopolymers; olivine; silica;

D O I：

10.1080/00207233.2019.1585156

中图分类号：

学科分类号：

摘要：

The present research deals with the production and characterisation of geopolymers prepared by mixing metakaolin (MK), a commercial sodium silicate solution, a sodium hydroxide solution and two types of industrial by-products: one olivine (OS) and one silica sand (SS) both of them in form of loose powders. Different specimens were prepared by mixing different quantities of OS or SS to the blank geopolymeric matrix. Specimens containing MK, a commercial sodium silicate solution and a sodium hydroxide solution were also prepared as blank composition for comparison. All specimens were characterised by their compressive strength, water absorption, pore size distribution, specific surface area and microstructure. The addition of olivine or silica powders improves the performances of the resulting materials in all the compositions examined, but those containing 50 wt% of added sand (relative to the amount of MK) displayed the best mechanical behaviour. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

引用

页码：491 / 506

页数：15

共 57 条

[1]

Van Jaarsveld J.G.S., Van Deventer J.S.J., Lorenzen L., The potential use of geopolymeric materials to immobilise toxic metals: part I. Theory and applications, Mineral Engineering, 10, 7, pp. 659-669, (1997)

[2]

Van Jaarsveld J.G.S., Van Deventer J.S.J., Schwartzman A., The potential use of geopolymeric materials to immobilise toxic metals: part II. Material and leaching characteristics, Mineral Engineering, 12, 1, pp. 75-91, (1999)

[3]

Van Jaarsveld J.G.S., Van Deventer J.S.J., Effect of metal contaminants on the formation and properties of waste-based geopolymers, Cement Concrete Research, 29, 8, pp. 1189-1200, (1999)

[4]

Malviya R., Chaudhary R., Factors affecting hazardous waste solidification/stabilization: a review, Journal of Hazardous Materials, 137, 1, pp. 267-276, (2006)

[5]

Khalil M.Y., Merz E., Immobilization of intermediate-level wastes in geopolymers, Journal of Nuclear Materials, 211, 2, pp. 141-148, (1994)

[6]

Palomo A., Palacios M., Alkali-activated cementitious materials: alternative matrices for the immobilisation of hazardous wastes–Part II. Stabilisation of chromium and lead, Cement Concrete Research, 33, 2, pp. 289-295, (2003)

[7]

Palacios M., Palomo M.A., Alkali-activated fly ash matrices for lead immobilisation: a comparison of different leaching tests, Advances in Cement Research, 16, 4, pp. 137-144, (2004)

[8]

Jimenez A.M.F., Lachowski E.E., Palomo A., Macphee D.E., Microstructural characterisation of alkali-activated PFA matrices for waste immobilisation, Cement Concrete Composites, 26, 8, pp. 1001-1006, (2004)

[9]

Hills C.D., Pollard S.J.T., The influence of interference effects on the mechanical, microstructural and fixation characteristics of cement-solidified hazardous waste forms, Journal of Hazardous Materials, 52, 2-3, pp. 171-191, (1997)

[10]

Leonelli C., Kamseu E., Lancellotti I., Barbieri L., Geopolymerization as cold-consolidation techniques for hazardous and non-hazardous wastes, Key Engineering Materials, 751, pp. 527-531, (2017)

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