Majda Pavlin (Avtor), Barbara Horvat (Avtor), Ana Frankovič (Avtor), Vilma Ducman (Avtor)

Povzetek

Mineral waste wool represents a significant part of construction and demolition waste (CDW) not yet being successfully re-utilized. In the present study, waste stone wool (SW) and glass wool (GW) in the form received, without removing the binder, were evaluated for their potential use in alkali activation technology. It was confirmed that both can be used in the preparation of alkali-activated materials (AAMs), whether cured at room temperature or at an elevated temperature in order to speed up the reaction. The results show that it is possible to obtain a compressive strength of over 50 MPa using SW or GW as a precursor. A strength of 53 MPa was obtained in AAM based on GW after curing for 3 days at 40 °C, while a similar compressive strength (58 MPa) was achieved after curing the GW mixture for 56 days at room temperature. In general, the mechanical properties of samples based on GW are better than those based on SW. The evolution of mechanical properties and recognition of influential parameters were determined by various microstructural analyses, including XRD, SEM, MIP, and FTIR. The type of activator (solely NaOH or a combination of NaOH and sodium silicate), and the SiO2/Na2O and liquid to solid (L/S) ratios were found to be the significant parameters. A lower SiO2/Na2O ratio and low L/S ratio significantly improve the mechanical strength of AAMs made from both types of mineral wool.

Ključne besede

alkalijska aktivacija;odpadna volna;SEM;XRF;XRD;mehanska trdnost;odprti dostop;alkali activation;waste mineral wool;mechanical strength;open access;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: ZAG - Zavod za gradbeništvo Slovenije
Založnik: Ceramurgica s.p.a.
UDK: 620.1/.2
COBISS: 50723075 Povezava se bo odprla v novem oknu
ISSN: 0272-8842
Št. ogledov: 12
Št. prenosov: 3
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarne ključne besede: alkalijska aktivacija;odpadna volna;SEM;XRF;XRD;mehanska trdnost;
Komentar vira: E-članek objavljen: 15 February 2021;
Strani: str. 15102-15113
Letnik: ǂVol. ǂ47
Zvezek: ǂiss. ǂ11
Čas izdaje: Jun. 2021
DOI: 10.1016/j.ceramint.2021.02.068
ID: 19684007