Author:

Keywords:

Faculteit Toegepaste Ingenieurswetenschappen, Ingenieurswetenschappen. Technologie, A1 Tijdschriftartikel, Energie en Materialen in Infrastructuur en Gebouwen (EMIB)

Abstract:

The scope of the paper is to report an investigation on durability of infrastructure concrete for roads and bridges by creating a size and shape-designed pore systems in concrete in order to improve it, especially in terms of freezethaw resistance. By means of this experimental laboratory study, an alternative for usage of air entrainment agents (AEA) in concrete infrastructures was found in the way of using superabsorbent polymer materials (SAPs). The effect of the addition of SAPs of different amounts and different types into fresh concrete mix was investigated, including: compressive strength tests, weight loss measurements, visual and microscopic inspections and scanning electron microscopy (SEM) analysis. The detrimental strength reduction effect was not observed. The freezethaw procedure was varied, using different types of de-icing salts and heating/cooling regimes. It can be concluded that an improvement of the freezethaw resistance of concrete infrastructure depends on the particle size and optimal amount of SAPs added into concrete mix. The addition of 0.26 wt % of dry SAPs into the fresh concrete reference mix led to the significant decrease of scaling up to 43% after 28 freezethaw cycles. Both dosage and particle size of the SAPs had a significant impact on the obtained results and the freezethaw resistance in this experimental laboratory study.