Rammed Earth stabilised with waste materials: a sustainable and resistant solution

SBE19 - Resilient Built Environment for Sustainable Mediterranean Countries

生态环境科学;政治学社会学

Arrigoni, A.^1 ; Simoni, G.^2 ; Dotelli, G.^2 ; Pelosato, R.^2^3 ; Caruso, M.^4

Department of Civil and Mineral Engineering, University of Toronto, 35 St. George Street, Toronto

ON

1A4, Canada^1

Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan

20133, Italy^2

Dipartimento di Ingegneria e Scienze Applicate, Università di Bergamo, Viale Marconi 5, Dalmine, BERGAMO

24044, Italy^3

Laboratorio Prove Materiali, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milan

20133, Italy^4

关键词: Calcium carbide residue;    Early age strengths;    Environmental sustainability;    Flue gas desulfurization;    Low compressive strengths;    Mechanical resistance;    Mediterranean region;    Vernacular architecture;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/296/1/012019/pdf
DOI  :  10.1088/1755-1315/296/1/012019

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Earthen dwellings are part of the vernacular architecture and cultural heritage of many countries in the Mediterranean region, and a renovated interest towards these types of structures is now widespread in the same countries mainly due to sustainability reasons. However, poor resistance to weathering compromises their durability and their popular acceptance. A fascinating option to improve the resistance of earthen structures while preserving their environmental sustainability is to use locally available waste materials as stabilisers. In this paper, the evolution over time of the mechanical resistance of rammed earth stabilised with residues from widespread industrial processes (i.e. fly ash from coal combustion and calcium carbide residue from acetylene production) was investigated. Waste-stabilisation prompted optimal long-term mechanical resistance; on the other hand, laboratory samples exhibited low compressive strengths in the short-term when cured under standard conditions. The addition of a supplementary industrial residue (i.e. gypsum from flue gas desulfurization) was explored to enhance the early-age strength. Results confirmed the short-term strength benefits induced by gypsum addition.