In total it concerns 27 different concrete mixtures, spread over 34 blocks. The goal: to investigate which compositions the test of time and the influence of the elements are best passed.
The blocks remain for ten years and are extensively investigated annually for wear, cracking and other damage. Samples are also regularly drilled to check the internal structure and strength in laboratories.
Concrete more sustainable: necessity for the future
The test is part of a broader mission from Rijkswaterstaat: making the concrete sector more sustainable. Traditional concrete has a high environmental impact. The production of cement requires a lot of energy and causes considerable CO₂ emissions. Moreover, the raw materials are often extracted in polluting mining.
That is why Rijkswaterstaat is experimenting with market parties with more sustainable alternatives. Think of concrete mixtures with less vowel (the binder in concrete) or mixtures in which recycled material is incorporated, such as stones from old concrete. Some of these mixtures have a up to 50% lower environmental impact.
Testing garden for innovations
The test in IJmuiden is one of the so -called testing grounds in which Rijkswaterstaat offers space for innovations. “We are not only testing the sustainability, but also technical characteristics such as strength and lifespan,” says Penny Pipilikaki, senior technical adviser.
“Only when we know for sure that the material is also good in the long term, can we use it responsibly in tunnels, viaducts and other infrastructure projects.”
Although the first official measurement moment will only take place next year, project leader Romer will not last that long. Laughing: “I am really curious. I work specifically on making material concrete more sustainable, so this is just great fun for me. I will definitely take a look at how ‘my’ blocks are there.”