Title: Penetration Profiles of Water Repellent Agents in Concrete as a Function of Time – Determined with FTIR-Spectrometer

Author(s): Anders Johansson-Selander, Mårten Janz, Johan Silfwerbrand, Jan Trägårdh

Publication: NCR

Volume: 41

Issue: 4

Appears on pages(s): 51-60

Keywords: Silane, water repellent agent, FTIR-spectrometer, penetration profile.

DOI:

Date: 6/15/2010

Abstract:
The success of a water repellent treatment on concrete is often judged by the visual penetration depth. This method, however, only indicate if the water repellent agent has penetrated the concrete or not. With the use of a FTIR-spectrometer with KBr-tablets a determination of the concentration of the water repellent agent can be made. This is an important tool in the understanding of how these treatments work. From the results of the experiment presented in this paper it is clear that the duration of contact between a water repellent agent and the concrete is important for the outcome of the treatment. It is clear that the concentration as well as the depth increases with a prolonged time for the treatment.