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A method based on isothermal calorimetry to quantify the influence of moisture on the hydration rate of young cement pastes

In English

Författare

Summary, in English

Cement hydration needs water to proceed and if water is lost by drying, the hydration rate will decrease This can be of importance in cases when concrete surfaces are exposed to drying so that their strength development will be retarded We describe a method based on isothermal calorimetry to assess how the rate of cement hydration is influenced by removal of water (drying) at different times up to three days after mixing Thin samples of cement pastes are hydrated in a calorimeter and at different times exposed to one hour drying periods The resulting decrease in thermal power following the removal of water is quantified as a measure of the reduction in hydration rate The mass loss is found by weighing the samples before and after a measurement, and the change in water activity of a sample during drying can be found from the slope of the thermal power during the drying period (C) 2010 Elsevier Ltd All rights reserved

Publiceringsår

2010

Språk

Engelska

Sidor

867-874

Publikation/Tidskrift/Serie

Cement and Concrete Research

Volym

40

Issue

6

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Materials Engineering

Nyckelord

  • Hydration
  • Calorimetry
  • Drying
  • Kinetics

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0008-8846