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<strong>Backfill</strong> requirements<br />
Objectives of the backfill measure<br />
4) providing a chemical environment consistent with the design concept<br />
→ Limitation of soluble chlorides, sulphur-containing substances, organic materials.<br />
The chemical requirements influence the selection of the ingredients (no fly ash,<br />
no burnt slates, no slag containing materials, e.g. CEM III-cement, blast-furnace slag, etc.)<br />
5) no damage of the gallery walls<br />
→ Limitation of the autogenous swelling or shrinkage of the backfill.<br />
6) limited strength to enable the retrieval of waste packages<br />
→ Limitation of the compressive strength.<br />
A high porosity of the backfill (diffusion and flow of gases) and<br />
a high thermal conductivity (galleries with heat-generating waste) are favourable.<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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