TY - JOUR
T1 - Efficiency of limestone in clinker-reduced binders
T2 - Consideration of water-binder ratio, capillary porosity and compressive strength
AU - Rudić, O.
AU - Ukrainczyk, N.
AU - Krüger, M.
AU - Tritthart, J.
AU - Juhart, J.
N1 - Publisher Copyright:
© 2023
PY - 2023/7/10
Y1 - 2023/7/10
N2 - Multicomponent binders of Portland cement (C) in combination with granulated blast furnace slag (S) and limestone powders (LP), that can make a significant contribution to the desired decarbonization of the cement and concrete industry in the next few years, are investigated in this study. Considerably altered porous microstructure – i.e. increased specific inner surface and gel volume content as well as coarsened capillary porosity are observed, especially in case of ternary blends (C/S/LP) compared to binary (C/S) and (C/LP) mixes. A beneficial effect of LP on enhancement of hydration of C and S contributed to the compressive strength development, particularly between the first and 28th day of curing with an appropriate content of very fine LP at low w/b (water/binder) values. The effect of LP in the mix design can be described very well by means of an adjusted w/beff (with kL = 0.15 of the LP). This is clearly displayed by very good correlations of w/beff and compressive strength as well as capillary porosity. The findings of this study provide guidance for optimizing the mix design of clinker reduced multicomponent mixes in order to reliably estimate their performances.
AB - Multicomponent binders of Portland cement (C) in combination with granulated blast furnace slag (S) and limestone powders (LP), that can make a significant contribution to the desired decarbonization of the cement and concrete industry in the next few years, are investigated in this study. Considerably altered porous microstructure – i.e. increased specific inner surface and gel volume content as well as coarsened capillary porosity are observed, especially in case of ternary blends (C/S/LP) compared to binary (C/S) and (C/LP) mixes. A beneficial effect of LP on enhancement of hydration of C and S contributed to the compressive strength development, particularly between the first and 28th day of curing with an appropriate content of very fine LP at low w/b (water/binder) values. The effect of LP in the mix design can be described very well by means of an adjusted w/beff (with kL = 0.15 of the LP). This is clearly displayed by very good correlations of w/beff and compressive strength as well as capillary porosity. The findings of this study provide guidance for optimizing the mix design of clinker reduced multicomponent mixes in order to reliably estimate their performances.
KW - Ground granulated blast furnace slag
KW - Limestone efficiency
KW - Porosity
KW - Strength development
KW - Supplementary cementitious materials (SCMs)
UR - http://www.scopus.com/inward/record.url?scp=85154578166&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2023.131594
DO - 10.1016/j.conbuildmat.2023.131594
M3 - Article
AN - SCOPUS:85154578166
SN - 0950-0618
VL - 386
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 131594
ER -