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Published January 19, 2022 | Version v1
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paperChain - FACTSHEET CC2 - "Construction: roads with WPFA based HRB binders"

Creators

  • 1. TECNALIA

Description

This factsheet has been extracted from D07.3 "Guidelines for the implementation of the Circular Economy models"

CC2: Wastepaper Fly ash (WPFA) for Hydraulic Road Binders (HRBs) production: CC2 is focused on Wastepaper Fly Ash (WPFA) based hydraulic road binder (HRB) production for soil stabilization in road construction sector. ACCIONA (Constructor) and SAICA (PPI waste valoriser) that generates the WPFA, cooperated in PAPERCHAIN to find an alternative and sustainable solution for the use of fly ash waste other than landfilling. In CC2 ash replaces standard binder (cement) typically employed in the stabilization of soils S-EST2, S-EST3 type layers (according to local standards PG3) in rural roads, and a soil-cement layer in highway. 3 Pilots successfully completed in Spain: a) unpaved rural road (Ejea de los Caballeros, Zaragoza), b) paved peri urban road (Villamayor de Gállego, Zaragoza); c) A31 highway (La Font de la Figuera, Valencia). UPC (University), and TECNALIA (Research Center) have supported CC2 in product design, and the technical and environmental performance monitoring. Process must be adapted to the characteristics of WPFA to avoid problems of low density, mixing-compaction and generation of dust when mixing on site (stabilized soils approach). WPFA quality monitoring is focused on its salts and heavy metals content and variability. CC2 CEM has a high replicability potential. A technical Conformity (TC) document for its certification as product in progress.Figure 1 shows the CC2 Circular Case in Spain, Figures 2-4 show the industrial scale pilot demonstration, and Tables 1 and 2 show the CC main items, Key factors and lessons learnt.

Files

FACTSHEET CC2-Construction- roads with WPFA based HRB binders .pdf

Files (1.8 MB)

Additional details

Funding

PAPERCHAIN – New market niches for the Pulp and Paper Industry waste based on circular economy approaches 730305
European Commission