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The Boston City Hall is one of the most controversial examples of American Brutalism. Once celebrated as avant-garde, today it gets greeted only with scorn - and is gradually falling apart.
Can You Use Old Concrete As Fill for New Concrete?
You can use old concrete as fill for new concrete to create aggregate to add bulk, compressive strength, and stability, as well as for recycling purposes.
Most of the mechanical concrete properties are characterised solely via the compressive strength class. Eurocode 2 (EC2)(1) contains rules for the design values of creep and stiffness parameters based mainly on strength. Concrete modulus of elasticity is seldom registered experimentally and Scandinavian research shows that the EC2 rules are overestimating the design modulus significantly. Claus Vestergaard Nielsen of Rambøll Danmark reports.