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Glinicki M.A., Dąbrowski M., Skrzypczyński M.♦, Influence of curing on the properties of air-entrained concrete in the upper layer of exposed aggregate pavement-modelling study,
CEMENT, WAPNO, BETON, ISSN: 1425-8129, Vol.XXII/LXXXIV, No.4, pp.271-281, 2017Abstract: Modelling studies in laboratory of the effect of curing on the mechanical properties and durability of the concrete pavement with exposed aggregate are presented. Air-entrained concrete was designed as the top layer of a motorway pavement with the use of two types of cements: CEM I and CEM III/A. The w/c increase (from 0.34 to 0.37) and change of cement type (CEM I 42.5N and CEM III/A 42.5 N) in properly air-entrained concrete did not influence significantly the internal frost resistance F200 - a decrease of the compressive strength after 200 freeze-thaw cycles was in the range from 4 to 12%. The lowest reduction of strength was observed for concrete with CEM I, w/c=0.34 and proper air entrainment. The properly air-entrained concrete layer with exposed aggregate, which was cured with a curing agent with closure capacity > 85%, was characterized by a very good resistance to surface scaling - the mass of scales m56 was equal to 0.10-0.12 kg/m2, irrespective of the type of cement and w/c ratio. However, there was a significant increase in the water absorption rate, surface scaling and chloride permeability, which caused with inadequate curing Keywords: air entrained concrete, curing, durability, exposed aggregate pavement, frost resistance, road pavement, permeability, scaling resistance Affiliations:
Glinicki M.A. | - | IPPT PAN | Dąbrowski M. | - | IPPT PAN | Skrzypczyński M. | - | other affiliation |
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