Cement and Concrete Research

Introduction

In this paper, the discussion will be made on the research Bouteiller (2012) i.e. the study is based on Portland or GGBS cements for initiation of corrosion of reinforcing concretes. This study is somehow interesting for the researchers but practically it is problematic piece of research. Through a critical review of Boutellier (2012), the argument will be developed in which there will be a discussion based on the conceptual bases, main findings or results, research methods and the future or practical implications.

Compared to OPC cement, there is a delay in the chloride penetration ions which are highlighted in the results. The discussion phase relies on the binding of chloride ability of both of cements which represents the first section. While in the second section, rebar corrosion' behavior of GCBS concretes has been considered as well as the reliability characterizing the rebar corrosion which are used by RILEM or ASTM recommendations and based on the type of cement.

Synopsis

Boutellier's study reports the a study in which the ingress of chlorides investigated that reinforces concretes on the basis of two cements; one is ground granulated blast furnace slag cement (GGBS) and Portland cement (OPC). The mainly research is concerned with the behavior of corrosion for the steel bar.

Boutellier's research finding shows that the exposure of the chloride was obtained in one to two years through drying and wetting cycles. It also shows that there is a delay in the ingression of chloride because of induction of GGBS concretes. This finding is obtained from the development of the free and total chloride versus the time of exposure.

Concepts and Literatures

The concept of critical chloride content is somehow related with the corrosion process of reinforcing steel that is having an influence of chloride ions (Bentur et al. 1997). There are several researches which have to be highlighted. Firstly the process of physical and chemical of chloride ingress should be correlated to the nature of cement and need to be improved. Researches about total chlorides highlight that there is a more need of searching for understanding the effect of matrix binding which effects on the rate of chloride ingress (Palmo et al. 1997). Steel can be protected against corrosion when the passivity will be occurred in the alkaline concrete (Palmo et al. 1999).When water and oxygen is existed at some place, there are more chances of having corrosion. A structure of iron can be reduced due to the reinforcing of corrosion on the steel i.e. the period or timely performance of a structure which has to maintain the minimum performance will be reduced (Palmo et al. 1999).

Findings from the laboratory analysis and the survey field, in which 80 bridge decks are examined in New York and Pennsylvania based on the age between four to eighteen years are found to have good performance but some of the locations identified the failure processes. For these failure processes, the linear extrapolation is not appropriate in which corrosion do not damage or a nil effect ...