R concrete for concrete products and precast concrete elements

R concretes with a proportion of recycled aggregates are standardized normal concretes which are allowed for use in Germany up to strength class C30/37. Because of the good technical properties and the ecological advantages, the article presents possible applications in the field of concrete products and precast concrete elements. Read part 1 of the paper.

R concrete with a proportion of recycled aggregates made from crushed concrete and crushed masonry in compliance with standards are standardized normal concretes which are allowed for use in Germany up to strength class C30/37. Unfortunately, they are only occasionally used in concrete construction and almost exclusively as ready-mixed concrete owing to the low degree of awareness and rather regional availability. Because of the equivalent technical properties and the ecological advantages with regard to conserving resources and saving of landfill volume, the article presents so-called R...

Related articles:

Issue 12/2017

R concrete for concrete products and precast concrete elements

R concrete with a proportion of recycled aggregates made from crushed concrete and crushed masonry in compliance with standards are standardized normal concretes which are allowed for use in Germany...

more
Issue 02/2023

The use of recycled crushed concrete sand as basis for alkali-activated concretes

The cement industry and concrete manufacturers together are appealed for reducing the consumption of resources as well as the carbon emissions related to the production of cement. This paper examines...

more
Issue 02/2017 results and examples of use

Studies on the use of Type 2 recycled aggregates

The lecture will present the studies and preliminary results of the project on applied research funded by the German Federal Foundation for the Environment (Deutsche Bundesstiftung Umwelt): “Studies...

more
Issue 10/2009 Paving blocks and street furniture

Precast products made of recycled concrete

A concrete was envisaged that would allow for recycled aggregates as an input material, rather than just an additive or material put into the process at a later stage. The project generally aimed to...

more
Issue 05/2013

Opportunities and limitations of concrete recycling

Unlike concrete based on natural aggregates, recycled-aggregate concrete contains two types of cement paste: the “new” paste creating concrete strength and the “old” paste whose parameters – such...

more