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2. Manufacturing
The sole constituent of natural hydraulic lime is a limestone containing 15-20% silica and alumina, as well as a varying percentage of iron.
2.1 Extraction, crushing and screening
Limestone is extracted from underground or open-cast quarries (see figure 2 ). The resulting blocks are crushed in primary crushers, then screened. The finest elements are generally discarded to avoid clogging the straight kilns. The stones are graded according to the kiln of destination (mixed or natural gas) (see figure 3 ).
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Standards and norms
- Chaux de construction. Partie 1 : Définitions, spécifications et critères de conformité. - AFNOR NF EN 459-1 - 2012
- Chaux de construction. Partie 2 : Méthode d'essai. - AFNOR NF EN 459-2 - 2012
- Small masonry units – walls. - AFNOR NF DTU 20.1 -
- Cloisons en maçonnerie de petits éléments. - AFNOR NF DTU 20.13 -
- Travaux d'enduits et mortiers. - AFNOR NF DTU 26.1 -
- Revêtement de...
Regulations
Law no. 83-634 of July 13, 1983 on rights and obligations... (consolidated version of March 3, 2002).
Décret n° 2000-44 du 13 janvier 2000 portant... (version consolidée au 5 octobre 2007) JO n° 11 du 14 janvier 2000 page 369 NOR : FPPA9910013D.
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Cerium electrolytic oxidation process and electrolysis unit for its implementation CA2582058.
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Boehm
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