Til hovedinnhold

Lightweight Aggregate Fines as Pozzolanic Additive for High-Performance Concrete

Lightweight Aggregate Fines as Pozzolanic Additive for High-Performance Concrete

Kategori
Vitenskapelig foredrag
Sammendrag
Synopsis: Finely ground lightweight aggregate (LWA) based on calcined and expanded clay has been proven to be quite an effective pozzolan. When replacing cement with 15% LWA fines the concrete compressive strength becomes more sensitive to temperature and time, and 28 day strength is typically 10-15% lower when cured at 5°C, equal when cured at 20°C and 15% higher when cured at 35°C. However, cement replacement by such a mineral increases the concrete resistance to chloride ingress, reduces alkali aggregate reactions and increases the sulfate resistance. Carbonation rate, on the other hand, is somewhat increased as for most pozzolana. Freezing and thawing resistant concrete can also be made with this additive. Thus, finely ground LWA can be utilized to make high performance concrete. 
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • SINTEF Community / Arkitektur, byggematerialer og konstruksjoner
Presentert på
Proceedings of the 9th CANMET/ACI Internationale Conferenc
Sted
Warszawa, Polen, 2007-05-21--25
Dato
21.05.2007 - 25.05.2007
Arrangør
CANMET/ACI
År