The influence of calcium chloride on flexural strength of cement-based materials

Chunyu Qiao, Prannoy Suraneni, Marisol Tsui Chang, Jason Weiss

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Calcium chloride (CaCl2), which is commonly used as a deicing salt, can react with calcium hydroxide (Ca(OH)2) in cement-based materials to form calcium oxychloride. This reaction causes damage that typically manifests itself as flaking of concrete pavements at the joints and leads to expensive repairs and a reduction of the service life. In this paper, cement pastes with different fly ash replacement levels were prepared to provide pastes with differing amounts of Ca (OH)2. Thermogravimetric analysis was used to quantify the Ca(OH)2 content in these pastes. Low-temperature differential scanning calorimetry (LT-DSC) was used to quantify the amount of calcium oxychloride formed when these pastes were exposed to CaCl2 solutions. The reduction in the flexural strength of these pastes saturated with different CaCl2 solutions was also measured. As the concentration of CaCl2 increases, the reduction in flexural strength increases. There is a lower flexural strength reduction in pastes with fly ash, because these pastes have lower Ca(OH)2 and form lower amounts of calcium oxychloride. The strength reduction is directly correlated to the amount of formed calcium oxychloride.

Original languageEnglish (US)
Title of host publicationHigh Tech Concrete
Subtitle of host publicationWhere Technology and Engineering Meet - Proceedings of the 2017 fib Symposium
EditorsMladena Lukovic, Dick A. Hordijk
PublisherSpringer International Publishing
Pages2041-2048
Number of pages8
ISBN (Electronic)9783319594705
DOIs
StatePublished - Jan 1 2017
Externally publishedYes
Event2017 fib Symposium - High Tech Concrete: Where Technology and Engineering Meet - Maastricht, Netherlands
Duration: Jun 12 2017Jun 14 2017

Other

Other2017 fib Symposium - High Tech Concrete: Where Technology and Engineering Meet
CountryNetherlands
CityMaastricht
Period6/12/176/14/17

Keywords

  • Calcium chloride
  • Calcium oxychloride
  • Cement-based materials
  • Flexural strength

ASJC Scopus subject areas

  • Architecture
  • Building and Construction
  • Civil and Structural Engineering

Fingerprint Dive into the research topics of 'The influence of calcium chloride on flexural strength of cement-based materials'. Together they form a unique fingerprint.

  • Cite this

    Qiao, C., Suraneni, P., Chang, M. T., & Weiss, J. (2017). The influence of calcium chloride on flexural strength of cement-based materials. In M. Lukovic, & D. A. Hordijk (Eds.), High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium (pp. 2041-2048). Springer International Publishing. https://doi.org/10.1007/978-3-319-59471-2_233