Evaluation of water absorption of concrete as a measure for resistance against carbonation and chloride migration

Autor: Katrien Audenaert, G. De Schutter
Rok vydání: 2004
Předmět:
Zdroj: Materials and Structures. 37:591-596
ISSN: 1871-6873
1359-5997
DOI: 10.1007/bf02483288
Popis: The pore structure of concrete is known to be of high importance for the durability of the material. A characterisation of this pore structure by means of a simple test is often investigated, in order to find a very simple compliance criterion with respect to concrete durability. Within some daily-used Belgian technical guidelines, the water absorption by immersion is considered to be a relevant parameter in this respect. Based on an extended experimental research programme, with test on 22 different concrete mixes (traditional concrete and self-compacting concrete), the relation between water absorption by immersion and some concrete durability issues is investigated. Within these tests, accelerated carbonation and chloride migration tests are realised. Furthermore, some technological parameters are investigated, related with the volume to surface ratio of the specimens used for the water absorption test. It is concluded that the influence of the volume-to-surface ratio of the specimens is not significant when considering the natural scatter on the test results. Furthermore, the water absorption by immersion is not a reliable parameter for the estimation of the concrete durability. The water absorption by immersion gives an estimation of the total (reachable) pore volume of the concrete, but gives no indication on the concrete permeability, which is more important with regard to durability.
Databáze: OpenAIRE
Externí odkaz: