Internship | Re-activating recycled old cement for use in new concrete

In order for the building industry to become more sustainable, especially the cement production has to be reconsidered since it produces more than 5 % of the annual CO2-emmission worldwide. At the same time, circularity has become a prerequisite to enable a sustainable society. For concrete structures, this means that one option for circularity is to make new concrete from old concrete. However, since the old cement has spent its reactivity, re-activation is required. Moreover, since part of the recycled old concrete milled to ultrafine, cement-size particles is milled sand and gravel, the old cement in the recycled ultrafines is lower than may be anticipated. Hence, some reactive components have to be added also from volume proportion considerations.

We are looking for a student with a strong affinity for practical work, to investigate the effect of activators on the binding capacity of recycled old cement. To this effect you will mix and cast your own mortar and test them for hardening, strength development and elasticity. In addition, monitoring of properties like electric conductivity, pH and Ca-concentrations in the chemical laboratory will be part of the research.

You will write an internship report or master thesis in which you not only present the research programme and the rationale behind it and the results but you will also include a concise interpretation and discussion with respect to the effect of activators on the performance of the recycled old cement as sustainable new binder for concrete.

You want to work on the precursor of your career; a work placement gives you an opportunity to take a good look at your prospective future employer. TNO goes a step further. It’s not just looking that interests us; you and your knowledge are essential to our innovation. That’s why we attach a great deal of value to your personal and professional development. You will, of course, be properly supervised during your work placement and be given the scope for you to get the best out of yourself. Naturally, we provide suitable work placement compensation.

At TNO, we innovate for a healthier, safer and more sustainable life. And for a strong economy. Since 1932, we have been making knowledge and technology available for the common good. We find each other in wonder and ingenuity. We are driven to push boundaries. There is all the space and support for your talent and ambition. You work with people who will challenge you: who inspire you and want to learn from you. Our state-of-the-art facilities are there to realize your vision. What you do at TNO matters: impact makes the difference. Because with every innovation you contribute to tomorrow’s world. Read more about TNO as an employer.

At TNO we encourage an inclusive work environment, where you can be yourself. Whatever your story and whatever unique qualities you bring to the table. It is by combining our unique strengths and perspectives that we are able to develop innovations that make a real difference in society. Want to know more? Read what steps we are taking in the area of diversity and inclusion.

After the first CV selection, the application process will be conducted by the concerning department. TNO will provide a suitable internship agreement. If you have any questions about this vacancy, you can contact the contact person mentioned below.