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Research projects on the subject Chemistry and mineralogy


Completed

Interactions between siliceous fly ash or calcined clay as cement main constituent and superplasticizers based on polycarboxylate ether as well as their influences on rheological properties of fresh cement paste and fresh concrete

It was determined how the rheological properties and the consistency of fresh concrete can be improved by the adjustment of the type and proportion of fly ash or calcined clay in the cement to the clinker as well as the type and dosage of the superplasticizer.

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Completed

Prevention of a deleterious ASR with Portland-fly ash cement – mechanisms in concrete

The research activities continued the project “Low alkali cements with fly ash” (IGF 17249N) with two main targets. Firstly the effects of different characteristics of cements with fly ash on the release of aluminium into the pore solution were investigated. Secondly it was looked into how much each of the examined mechanisms (reduction of the alkali ion concentration, reduction of portlandite availability, release of aluminium into the pore solution, change of the cement stone microstructure) contributes to the prevention of a deleterious ASR.

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Completed

Interactions between superplasticizers and cements with calcined clay in dependence of the temperature

The aim of the research project was to determine interactions between superplasticizers and cements with calcined clay.

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Completed

Suitability of various inorganic substances for use as a minor constituents in cements according to EN 197-1

The main scope of this research project was to supply evidence that selected inorganic substances are suitable for the use as minor constituents.

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Completed

Optimisation of cements with natural calcined clays as main constituent and durability of concretes made of these cements

The new research project focussed on the optimisation of pozzolanic cements concerning the processing and composition of their constituents as well as the durability of concretes made of these cements.

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Completed

Sulfate resistance testing of cement

The SVA test method should be modified in a way that it is possible to achieve clear test results for standard cements with known high or low sulfate resistance.

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Completed

Interactions between cements with several main constituents and methyl cellulose and their performance in dry mortar

Interactions between different structured or modified methyl hydroxyethyl celluloses and cements blended with limestone, blastfurnace slag or fly ash were determined.

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Completed

Influences of temperature on interactions between superplasticizers and cements with several main constituents

The aim of this research project was to determine interactions between superplasticizers and cements in the temperature range of 5 °C (41 °F) to 30 °C (86 °F). The main focus was on superplasticizers based on polycarboxylate ether and cements with several main constituents.

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Areas

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Subjects

  • All
  • Knowledge transfer
  • Cement production
  • Cement industry
  • Concrete technology
  • Chemistry and mineralogy
  • Quality assurance
  • Environmental protection

Languages

  • All
  • English

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