Construction and demolition waste as recycled aggregate for environmentally friendly concrete paving.
Environ Sci Pollut Res Int
; 29(7): 9826-9840, 2022 Feb.
Article
in En
| MEDLINE
| ID: mdl-34505964
ABSTRACT
Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed that the use of RA in percentages of up to 50 wt.% is feasible. Additionally, RA were used to produce paving blocks in accordance with industrial requirements. Thus, values of water absorption lesser than 6.0% and tensile strength upper than 3.6 MPa were obtained, which are similar to those of a reference sample and within the limit values established by the regulations. These results were achieved by reducing the incorporation of cement, thereby saving production costs and minimizing environmental impact.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Waste Management
Language:
En
Journal:
Environ Sci Pollut Res Int
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2022
Document type:
Article
Affiliation country:
España