Title:
Reactivity of Alternative Supplementary Cementitious Materials
Author(s):
Sivakumar Ramanathan
Publication:
Web Session
Volume:
ws_F23_SivakumarRamanathanSamiaTariq.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
In this work, 33 potential alternative supplementary cementitious materials(SCMs) were identified and categorized into alternative slags, alternative pozzolans, and alternative fillers. The reactivity of these materials was quantified using the modified R3 test. Three of these materials (glass, pumice, and limestone) were beneficiated by grinding to obtain materials of three different particle fineness values. The reactivity of these beneficiated SCMs was measured using the modified R3 test. The effect of fineness on cementitious paste properties was evaluated at a 30% mass replacement of OPC and 0.40 water-to-cementitious materials ratio. SCM reactivity increased with an increase in SCM fineness in both the model system and cementitious pastes. At early ages, the filler effects predominated in the cementitious pastes, whereas at later ages, the effect of SCM fineness on reactivity was evident. At 56 days, the coarse SCMs (>75 µm) acted primarily as fillers, whereas the fine SCMs showed increased reactivity in the cementitious pastes.