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The laboratory experiments illustrate the feasibility to backfill the disposal<br />
galleries according the requirements.<br />
Possible optimizations:<br />
Category B:<br />
Use of air-entraining agents.<br />
→ Increase of gas-filled pore space (storage volume for gas).<br />
→ The capillary-breaking pores reduce the pore saturation<br />
with Boom Clay pore solution.<br />
Category C: Addition of iron oxides (pigments) ± increase of the sand content 1 ±<br />
superplasticizers<br />
→ Increase of the thermal conductivity<br />
Index 1 : cf. Xu, Y. & Chung, D.D.L. (2000) Effect of sand addition on the specific heat and thermal conductivity of cement. Cement<br />
and Concrete Research, 30: 59-61.<br />
Engelhardt/Haverkamp<br />
Engelhardt, H.-J.; Haverkamp, B.; von Borstel, L.E.; Van Marcke, Ph. & Coppens, E.<br />
ONDRAF/NIRAS DBE Technology GmbH – <strong>Backfill</strong> Project – Project & ONDRAF/NIRAS<br />
B Tests & C B 31/07/2014 Techno & C Techno (MPA – Meeting Braunschweig)<br />
Category Brussels, <strong>WM2015</strong> -B 07. <strong>15374</strong> & 21/02/2013 November C 2014<br />
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