Field based performance indicators for concrete durability
Author(s): N. Srinivasan, M. Santhanam, Radhakrishna G Pillai
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
Pages: 275 - 282
Total Pages: 8
Durability of concrete mainly depends upon the quality of the mix constituents and construction practices. There are multiple durability parameters and test methods available and the challenge is to accurately identify the parameter to be specified, based on application and environment. A major factor that is significantly different in lab and field conditions is curing. This paper aims to assess the effect of different curing conditions that affect durability in residential and infrastructural type concrete.
The tests were conducted at 28, 56 and 90 days for a typical concrete used in infrastructure projects (30 – 35 MPa grade) incorporating fly ash (class F). Apart from specimens for testing, wall panels were prepared, and different sections of these panels were subjected to four different methods of curing viz. moist curing, plastic sheet curing, dry curing (no curing) and curing using chemical curing compound. Durability performance tests that were used in this study include the rapid chloride permeability test, accelerated migration test, chloride conductivity test, oxygen permeability test, and water sorptivity test. The test results indicate that (i) the variability in the parameters is greater for test specimens obtained from the panels as opposed to the standard specimens (cubes and cylinders) cured in moist conditions and (ii) the type of curing influences the durability properties of concrete prominently. The results from the study are expected to help in the implementation of durability specifications in construction projects.
Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00