Relationship between Results of Accelerated and Natural Carbonation in Various Concretes

Title: Relationship between Results of Accelerated and Natural Carbonation in Various Concretes
Author(s): Ferreira
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 988 - 997
Total Pages: 10
Nb references: 19
Language: English

Abstract: This paper presents part of the results of an experimental study performed at the Civil
Engineering Technological Center of FURNAS Centrais Elétricas (Goiânia), which was the
object of a master’s degree dissertation [1] conducted in the Master’s Program in Civil
Engineering of the Federal University of Goiás. The paper presents a comparison of results of
accelerated and natural carbonation in various concretes, which were produced using six
binary mixes of Portland cement CPII F with each of the following addition contents: 10% of
silica fume, 10% of metakaolin, 10% of rice husk ash, 25% of fly ash, 65% blast furnace slag
and reference (without addition); with two curing procedures (wet and air curing) and three
water/binder ratios (0.40, 0.55, 0.70). These concretes underwent an accelerated carbonation
process (in climatic test chamber with a CO2 content of around 5%) in parallel with natural
carbonation monitoring. As the main result it was noted that the coefficients of accelerated
carbonation were five times higher than the coefficients of natural carbonation, featuring good
correlations between those two types of attack. Furthermore, the results obtained
experimentally were confronted with carbonation estimation models (mathematical models),
in which it was observed that the direct relationship presented by those models cannot be
generalized.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.109