Post-Casting effects on Concrete Durability

The building and construction industry is an economic entity which is still largely based on traditional procedures and hand craft technologies. In the area of concrete construction, execution procedures and in-situ handling of flowable concrete are still a common practice. However, in terms of concrete durability, both these issues have a significant impact on the actual quality realized and… READ MORE.


An integral in-situ chloride sensing and monitoring system for concrete structures

In order to come to a reliable chloride sensor a full integral approach is proposed where the sensor development, the chloride induced degradation mechanism and the materials performance are developed simultaneously by three PhD projects. Hence, making sure there is a knowledge chain from materials performance to degradation, up to a sensor level and back. As such three… READ MORE.


InfraWatch: Data Management for Monitoring Infrastructural Performance

When considering our current stock of infrastructural assets like bridges, tunnels, etc, in view of service-life assessment, monitoring and sensing systems are very valuable instruments that can be used to extract actual information about its condition and performance. In terms of condition, sensor systems are mounted in or to structures that monitor the environmental as well as the internal condition. READ MORE.


Modelling, non-destructive testing and Li-based remediation of deleterious Alkali-Silica Reaction in concrete structures

Alkali Silica Reaction (ASR) is a silent killer of concrete as it often becomes apparent only five to 15 or more years after placement, and is also often misdiagnosed. Left untreated, ASR can continue to cause further expansion and cracking, which negatively influences tensile strength and eventually the structural capacity. Secondly, ASR may render the affected concrete… READ MORE.


Development of a Performance Assessment Tool for Alkali Silica Reaction (PAT-ASR)

PAT-ASR is proposed as a unique platform for engineers, where vital material, environment and structural parameters can be processed to review ASR related performance of a particular structure during its service life. The outcome provides a full-scale technical report as well as financial implications of the desired concrete design. PAT-ASR is also proposed as a tool for… READ MORE.


Measuring, Modelling and Monitoring Chloride ingress and Corrosion initiation in Cracked Concrete (M3C4)

Chloride ingress and subsequent reinforcement corrosion determine for a large part the service life of concrete structures. Various factors are highly uncertain, however. Previous research has addressed chloride ingress and various models and test procedures are available for concrete which is not loaded and not cracked. In practice, all concrete structures are loaded and… READ MORE.


Chloride penetration in cracked and uncracked concrete structures

In recent years, there is a clear trend towards design for durability of concrete structures. This requires the development and subsequent introduction of performance criteria as a design tool for practice. Corrosion of steel reinforcement induced by chlorides penetrating from the ex-posed concrete surface is considered as the major threat to durability of concrete structures. READ MORE.


Durable Repair and Radical Protection of Concrete Structures in View of Sustainable Construction

Quality assessment of concrete structures is complicated because, firstly, concrete itself is a heterogeneous material and, secondly, pouring and vibration of the fresh concrete can further enhance the scatter in the concrete quality (Of course, vibration has also positive effects). The scatter in concrete quality implies that a lot of tests, either destructive or… READ MORE.


Smart proof loading of concrete structures

Proof loading is a possibility to establish the condition of existing concrete bridges. In the USA this method is often used, since there are many bridges the data and properties of which are insufficient to obtain a reliable estimation of their bearing capacity with other methods of analysis. The problem with proof loading is that the level cannot be too high, because otherwise the… READ MORE.