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Issue 02/2015 Conception and findings

Accelerated test method for determination of resistance to carbonation

The carbonation of concrete and mortar can cause reinforcement corrosion. Therefore, the resistance to carbonation of concrete is an essential parameter for the evaluation of the durability of...

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Issue 02/2015 Overall concept, mix design development and performance

New concept for the development and evaluation of compositions with reduced CO2 burden

The political and social interest in reducing greenhouse gases has an influence on the developments in the construction industry too. This applies in particular to concrete construction, which...

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Issue 02/2015 Problems with the effectiveness of a polycarboxylate ­superplasticizer in concrete

Influence of clay minerals on the effect of PCE ­super­plasticizers

For some years, concrete manufacturers have increasingly been reporting on problems with clay contaminations in aggregates resulting in higher dosages of superplasticizers, in particular, of...

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Issue 02/2015 Introduction of resistance classes in the future concrete standard

Concepts to ensure the durability of concrete structures

Currently the durability aspects of concrete structures are regulated in the standards in a descriptive way. Depending on the exposure class, specified by the designer, in the concrete stan-dard...

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Issue 02/2015 Tools for analysis and characterization of environmental impact

Current LCA (life cycle assessment) data for traffic paved areas

Trafficked pavements, for example on roads, paths, places, areas of congregation and storage areas, are, as a rule, constructed with asphalt, concrete or segmental pavers, depending on the expected...

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Issue 01/2015 Hermann Rudolph Baustoffwerk

A future based on tradition

Every now and then, the wind carries not only the tinkling of cowbells but also a hum over the pastures near Ellhofen in the Allgäu. The sound is coming from the compacting stations in the factory...

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Issue 01/2015 Cerib

Thermolitys: Ultralight, high thermal efficiency

Growing emphasis on the concept of sustainable construction is having a substantial effect on materials: they must be able to combine structural strength, energy efficiency, and low environmental...

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Issue 01/2015 Maleki

Silicate based sealer for architectural concrete

LL-100 of Maleki is a one-component aqueous impregnation containing silicate. It reacts with the Ca(OH)2 to a silicate, stable substrate matrix that is resistant to acid. In addition, LL-100 forms...

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Issue 01/2015 Liebherr

Efficient concrete production with twin-shaft mixer

Twin-shaft mixers of Liebherr have been operating with success in concrete plants all over the world for many years. The space-saving design of the twin-shaft mixer is a particular advantage – above...

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Issue 01/2015 Rekers

Symposium in the Emslandian city of Spelle was well attended

The positive feedback on the event already in the time leading up to the 60th company anniversary was tremendous: The Managing Director Norbert Foppe, who together with his wife Annette controls the...

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