from XRPD analysis of leftover cement in recycled aggregates to micro-CT imaging of concrete microstructure
A. Bisciotti (Avtor), Lucia Mancini (Avtor), Alberto Viani (Avtor), Vesna Zalar Serjun (Avtor), Ana Mladenovič (Avtor), Giuseppe Cruciani (Avtor)

Povzetek

The content of leftover cement paste is a crucial parameter for determining recycled aggregates quality. Various methods assess this, including wet techniques (acid dissolution, chemical degradation, water absorption), physical approaches (freeze-thaw cycles, mechanical shredding, oven-dried density, thermal disaggregation), and spectroscopic or microscopy analyses. However, these methods often lack accuracy, are time-consuming, or depend on operator skill. A novel X-ray Powder Diffraction and Rietveld quantitative phase analysis approach is introduced to improve measurements precision. Results are compared with multi-scale analyses (microscopy, Xray computed tomography, mechanical testing) on recycled aggregate concrete specimens. Findings highlight a strong correlation between leftover cement paste content and key concrete properties, including microstructure, hydration products, and mechanical performance. This study confirms that leftover cement paste content is a decisive factor in recycled concrete aggregate properties, and that the proposed method offers a rapid and reliable approach to control this parameter.

Ključne besede

recikliran betonski agregat;reliktna cementna pasta;CDW;X-ray difrakcija;mikrostruktura;recycled concrete aggregate;leftover cement paste;, X-ray diffraction;microstructure;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: ZAG - Zavod za gradbeništvo Slovenije
Založnik: Elsevier
UDK: 620.1/.2
COBISS: 245620227 Povezava se bo odprla v novem oknu
ISSN: 2666-1659
Št. ogledov: 192
Št. prenosov: 143
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: recikliran betonski agregat;reliktna cementna pasta;CDW;X-ray difrakcija;mikrostruktura;
Strani: str. 1-12
Letnik: ǂVol. ǂ23
Zvezek: [article no.] 100709
Čas izdaje: Oct. 2025
DOI: 10.1016/j.dibe.2025.100709
ID: 27174951