Construction of a façade with geopolymer
Abstract Conference contribution describing the design and construction of a façade element made with geopolymer binder as a lower-CO₂ alternative to Portland cement. (El registro enlazado no incluye resumen detallado; si me pasas el PDF/abstract completo, lo incorporo y afino resultados y datos técnicos.)
Behaviour of geopolymers exposed to sulphate environments
Abstract Conference contribution on the performance of geopolymer binders when exposed to sulphate environments. The work is motivated by the high energy demand and CO₂ emissions of Portland cement and frames geopolymers as an environmentally friendly, lower-cost substitute. (Abstract text based on the repository record shown in your screenshot.)
The incorporation of construction and demolition wastes as recycled mixed aggregates in non-structural concrete precast pieces
Abstract Conference contribution on the performance of geopolymer binders when exposed to sulphate environments. The work is motivated by the high energy demand and CO₂ emissions of Portland cement and frames geopolymers as an environmentally friendly, lower-cost substitute. (Abstract text based on the repository record shown in your screenshot.)
Properties of Concrete Paving Blocks and Hollow Tiles with Recycled Aggregate from Construction and Demolition Wastes
Abstract The work investigates replacing natural aggregate with recycled aggregates from construction & demolition waste (C&DW) to manufacture precast, non-structural concretes (paving blocks and hollow tiles). A laboratory program assessed mechanical performance and service properties; mixes with selected C&DW fractions achieved requirements suitable for these precast products, supporting material circularity and reduced consumption of virgin aggregates..
QSI Methods for Determining the Quality of the Surface Finish of Concrete
Abstract The paper compares three ways to assess architectural concrete surface quality: (i) the manual Quality Surface Index (QSI) grouping pores by diameter, (ii) the visual CIB W29 template method, and (iii) digital image processing (ImageJ). Applied to three walls (M-1, M-2, M-3) at 3 m viewing distance, the three approaches delivered consistent rankings; e.g., ImageJ quantified pore-affected area as ~1.31% (M-1), 1.72% (M-2), and 2.75% (M-3). Results validate QSI and digital analysis as practical, more objective complements to CIB W29, enabling quick on-site verification and potential app-based workflows
On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements
Abstract Laboratory concretes (≈20 MPa target) were produced replacing 15–30% of natural aggregates with different recycled construction-and-demolition aggregates (RMA, ceramic, concrete) and with slag (coarse/fine) from Gas Incinerator Combined Cycle (GICC) plants. Mechanical properties, capillary absorption, density, carbonation, chloride ingress, and sulfate resistance were assessed. Using C&DW aggregates generally reduced performance versus the natural-aggregate control. In contrast, GICC by-products improved behaviour: the fine slag and fly ash used as cement additions enhanced long-term properties, and the coarse GICC slag used as recycled aggregate generally improved most properties. The study supports the feasibility of these wastes in non-structural concrete to promote circularity.
