Qa General materials science and construction materials science
Qb Mineral raw materials and construction materials
Qc Mineral binder
Qd Concrete
Qe Types of concrete
Qg Mortar
Qh Ceramics
Qi Glass and other melting products
Qk Metals
Ql Timber. Natural raw materials
Qm Bitumen
Qn Plastics
Qo Textiles
Qp Paints. Surface fillers. Glues. Putties.
Qr Composite materials
Qs Industrial waste
Qt Insulating materials. Sealing materials
Qu Recycling of building materials
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