Creep and thermal cracking of ultra-high volume fly ash mass concrete at early age

Zhifang Zhao, Kejin Wang, David A. Lange, Hougui Zhou, Weilun Wang, Dongming Zhu

Research output: Contribution to journalArticle

Abstract

An experimental study characterized fresh and hardened ultra-high volume fly ash mass concrete (HP-HVFA, with 80% fly ash and a water-to-binder ratio of 0.26) and normal content fly ash mass concrete (NS-FA, with 35% fly ash and a water-to-binder ratio of 0.43). The creep and thermal cracking behaviors of the HP-HVFA and NS-FA concrete were evaluated using a temperature stress testing machine (TSTM). A series of TSTM tests were conducted under an adiabatic curing mode and a temperature matched curing (TMC) mode. The results indicate that HP-HVFA concrete had moderate strength at early age and desirable fresh and hardened engineering properties. Under the both curing modes studied, HP-HVFA exhibited lower hydration temperature rise. Under the TMC mode, both compressive and tensile creep of HP-HVFA were lower than that of NS-FA although their specific creep and creep-to-shrinkage strain ratio at time of cracking were almost the same. Under adiabatic mode, HP-HVFA had higher creep strain, specific creep, and creep-to-shrinkage strain ratio than NS-FA.

Original languageEnglish (US)
Pages (from-to)191-202
Number of pages12
JournalCement and Concrete Composites
Volume99
DOIs
StatePublished - May 2019

Keywords

  • Creep
  • Early age
  • TSTM test
  • Thermal cracking
  • Ultra-high volume fly ash mass concrete

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Creep and thermal cracking of ultra-high volume fly ash mass concrete at early age'. Together they form a unique fingerprint.

  • Cite this