New findings and forecast models

Freeze-thaw attack and damage

The freeze-thaw damage pattern of concrete is primarily linked to the water contained in the pore system, which is also referred to as the saturation level. If a certain critical saturation level is exceeded, micro-cracking will occur even within a single or very few freeze-thaw cycles and lead to progressive destruction of the concrete matrix. It is thus crucial to quantify the influence of freeze-thaw cycling on the saturation level of the pore system in the concrete in order to develop a forecast model to predict freeze-thaw resistance. Non-destructive nuclear magnetic resonance imaging...

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Issue 12/2019

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High weather resistance of concrete pavers is crucial wherever paved surfaces are exposed to frequent freeze-thaw cycles. In this respect, it should be noted that the climatic conditions prevailing in...

Issue 02/2013 Current findings with respect to the XF2 freeze/thaw test method

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Generally accepted, internationally recognized methods (CIF and CDF) exist for testing the freeze/thaw resistance of concrete at high water saturation rates irrespective of the simultaneous action of...

Issue 01/2020

Assessment of frost and freeze-thaw damage to concrete pavers (Part 2)

The first part of this article dealt with the different patterns associated with freeze-thaw damage, the impact of cracks occurring in products, and the influence of installation and use on the onset...

Issue 10/2015

Effect of Calcium Nitrate on the freeze-thaw-resistance of concrete

Abstract Concrete in cold climates is not only exposed to cold weather while concreting but also to freeze-thaw cycles during its lifetime. Thus not only the concrete production needs to be adjusted...

Issue 02/2016 current knowledge, challenges and opportunities

Service life forecast for concrete

Overview Concrete structures are exposed to complex actions with an influence on durability that may lead to substantial damage during their service life, which has been increasingly observed in...