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Recycling of lightweight concrete

Sustainability benefits of lightweight concrete

→ 1 Process steps in the production of lightweight granular materials from demolished masonry

→ 2 Change in the compressive strength of reference mortars when substituting cement or adding old-concrete powder to the cement

The ongoing discussion on closed-loop recycling is increasingly focusing on the construction industry which uses significant amounts of mineral resources and counts among the large waste producers. In excess of 50 mio. tons of demolition waste are generated each year, frequently including a mixture of different components. New concepts and technologies are needed for their recovery. The increasing diversity of materials poses a problem.

Homogeneous material fractions free from foreign and undesirable substances are required, for example, for concrete construction. By 2020, the manufacturers of...

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