Effect of prevention for chloride ion using both of CA2 and expansive admixture to low heat portland cement

Takafumi Ito, Takeshi Iyoda

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

Abstract

Salt damage is one of the serious causes of deterioration in reinforce d concrete. However, when building mass concrete under salt damage environment, we have to use cement with a heat suppression effect which has low resistance for chloride ion. In this research, we focused on the CA2 which is admixture for salt damage prevention.CA2 reacts with calcium hydroxide from cement hydration and makes hydrocalumite. Thus, the soluble chloride ion is reduced. Finally, concrete using CA2 has high resistance for salt damage. LPC concrete using CA2 has low resistance for chloride ion than OPC concrete using CA2. After that, we had XRD measurement, and we have confirmed that hydration product is different in LPC and OPC when adding CA2 and expansive admixture. We think that the difference of hydration product is reason for difference of salt damage prevention by difference of ability to immobilize chloride ion.

Original languageEnglish
Title of host publicationLife-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure - 5th International Symposium on Life-Cycle Engineering, IALCCE 2016
PublisherCRC Press/Balkema
Pages1319-1326
Number of pages8
ISBN (Print)9781138028470
Publication statusPublished - 2017
Event5th International Symposium on Life-Cycle Engineering, IALCCE 2016 - Delft, Netherlands
Duration: 2016 Oct 162016 Oct 20

Other

Other5th International Symposium on Life-Cycle Engineering, IALCCE 2016
CountryNetherlands
CityDelft
Period16/10/1616/10/20

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ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

Cite this

Ito, T., & Iyoda, T. (2017). Effect of prevention for chloride ion using both of CA2 and expansive admixture to low heat portland cement. In Life-Cycle of Engineering Systems: Emphasis on Sustainable Civil Infrastructure - 5th International Symposium on Life-Cycle Engineering, IALCCE 2016 (pp. 1319-1326). CRC Press/Balkema.