@article{
author = "Merta, Ildiko and Poletanovic, Bojan and Dragas, Jelena and Carevic, Vedran and Ignjatovic, Ivan and Komljenović, Miroslav M",
year = "2022",
abstract = "The physical and mechanical properties of hemp-fibre-reinforced alkali-activated (AA) mortars
under accelerated carbonation were evaluated. Two matrices of different physical and chemical
properties, i.e., a low Ca-containing and less dense one with fly ash (FA) and a high Ca-containing
and denser one with FA and granulated blast furnace slag (GBFS), were reinforced with fibres (10 mm,
0.5 vol% and 1.0 vol%). Under accelerated carbonation, due to the pore refinement resulting from
alkali and alkaline earth salt precipitation, AA hemp fibre mortars markedly (20%) decreased their
water absorption. FA-based hemp mortars increased significantly their compressive and flexural
strength (40% and 34%, respectively), whereas in the denser FA/GBFS matrix (due to the hindered
CO2 penetration, i.e., lower chemical reaction between CO2 and pore solution and gel products), only
a slight variation ( 10%) occurred. Under accelerated carbonation, embrittlement of the fibre/matrix
interface and of the whole composite occurred, accompanied by increased stiffness, decreased deformation
capacity and loss of the energy absorption capacity under flexure. FA-based matrices exhibited
more pronounced embrittlement than the denser FA/GBFS matrices. A combination of FA/GBFSbased
mortar reinforced with 0.5 vol% fibre dosage ensured an optimal fibre/matrix interface and
stress transfer, mitigating the embrittlement of the material under accelerated carbonation.",
publisher = "MDPI",
journal = "Polymers",
title = "The Influence of Accelerated Carbonation on Physical and Mechanical Properties of Hemp-Fibre-Reinforced Alkali-Activated Fly Ash and Fly Ash/Slag Mortars",
volume = "14",
doi = "10.3390/polym14091799"
}
