IMPORTANCE OF FINENESS OF CDW AS CEMENT REPLACEMENT

Author(s): Sabina Rocha, Joana Sousa Coutinho
Paper category: Proceedings
Book title: IV International Conference Progress of Recycling in the Built Environment
Editor(s): Isabel M. Martins, Carina Ulsen, Yury Villagran
ISBN:
e-ISBN: Isabel M. Martins, Carina Ulsen, Yury Villagran
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 398-405
Total Pages: 08
Language : English

Abstract: Cement production is one of the main contributors to carbon dioxide (CO2) emissions. Waste
generation is also a concern in terms of sustainability. This work deals with partially replacing
cement with construction and demolition waste (CDW), thus contributing to Circular
Economy in construction. The mechanical properties (compressive and flexural strengths) and
durability related properties, such as chloride diffusion, accelerated carbonation and resistance
to alkali-silica reaction (ASR) were evaluated, in two similar researches, for mortars made
with 5% and 10 % cement replacement with ground CDW, and also 0% (CTL), hence a
control mortar. Research 1 also included testing resistivity, capillary absorption and resistance
to sulphate attack. Fineness of CDW seems to be a critical factor in terms of outcome. As for
results, mortar containing CDW did not attain control performance, except for expansion due
to ASR and for chloride resistance only in Research 2, probably due to fineness.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00