Evaluation and choice of suitable measures of protection

Chemical attack on concrete

Concrete is exposed to external chemical attack in various areas of application. This can seriously impair the durability and performance of a structure. The reactive component of the concrete to chemical attacks is essentially the cement paste. Depending on the type of the aggressive substances, different damage processes result. While acid has a solvent effect, the sulfates penetrating the concrete produce with constituents of the cement paste secondary sulfate phases, e.g. as ettringite, gypsum or thaumasite, that can trigger expansive/destructive processes. Exchange reactions in the cement...

Related articles:

Issue 02/2013 Day 3: Thursday, 7th February 2013

Part A: New regulations for design and realization of concrete buildings

Title Titel National application rules of EC 2 and EN 206 compared across Europe – Current status and options for simplification Nationale Anwendungsregeln von EC 2 und EN 206 im europäischen...

more
Issue 06/2022

Plastic shrinkage and cracking in 3D-printed concrete elements – mechanisms and countermeasures

3D concrete printing has the potential to achieve a breakthrough in the construction industry. However, a number of challenges need to be overcome. An important step for transferring the 3D concrete...

more
Issue 03/2015 Stocretec

Underground car park reprofiling and surface protection

Like in many other German cities, the Rheydt city center is suffering from a significant loss of functional diversity of its urban space, which is due to the dynamic development experienced in the...

more
Issue 02/2014 Improving concrete durability

Silage silos –

Assessments of the corrosion resistance of building materials are currently focusing on such fields of application that are associated with biogenic sulphuric acid corrosion (BSA). In particular,...

more
Issue 02/2014 Why do black, colored and gray concrete block surfaces appear lighter in the course of time?

Fading concrete block surfaces –

Bonding stability of pigments in hardened cement paste The needle-shaped structures existing in the concrete block are ideal bonding spots for metal oxide pigments such as Bayferrox iron oxide...

more