TY - JOUR
T1 - Functional and environmental performance optimization of Portland cement-based materials by combined mineral fillers
AU - Juhart, Joachim
AU - David, Gheorghe-Alexandru
AU - Saade, Marcella Ruschi Mendes
AU - Baldermann, Claudia
AU - Passer, Alexander
AU - Mittermayr, Florian
PY - 2019
Y1 - 2019
N2 - This paper presents a systematic design approach for an efficient use of OPC in cement-based materials in combination with inert mineral fillers. Functional properties of pastes are linked to Life Cycle Assessment. A new method combination (“Mi-S-S”, mixing-shear-resistance, spread flow, strength test) was successfully applied to identify and characterize proper fillers and to find optimum mix-ratios for eco-efficient pastes consisting of OPC, very fine micro-fillers (MFs) and fine “eco-fillers” (EFs). In mixes, OPC/EF/MF optimized against reference-mixes (i) high packing density, (ii) desired spread-flow and (iii) sufficient compressive strength (CS) was reached, (iv) reducing the environmental impact. Relationships were found to link mix-design parameters (OPC-content, w/c-, w/p-ratio etc.) to pastes' functional requirements (spread flow and CS). An optimum filler content of 20–40 vol% was identified in eco-efficient OPC/EF/MF mixes. Optimized mortars exhibited reductions of up to 37% and 24% in CO2- and embodied energy-intensities, respectively, in comparison to standard OPC mortars.
AB - This paper presents a systematic design approach for an efficient use of OPC in cement-based materials in combination with inert mineral fillers. Functional properties of pastes are linked to Life Cycle Assessment. A new method combination (“Mi-S-S”, mixing-shear-resistance, spread flow, strength test) was successfully applied to identify and characterize proper fillers and to find optimum mix-ratios for eco-efficient pastes consisting of OPC, very fine micro-fillers (MFs) and fine “eco-fillers” (EFs). In mixes, OPC/EF/MF optimized against reference-mixes (i) high packing density, (ii) desired spread-flow and (iii) sufficient compressive strength (CS) was reached, (iv) reducing the environmental impact. Relationships were found to link mix-design parameters (OPC-content, w/c-, w/p-ratio etc.) to pastes' functional requirements (spread flow and CS). An optimum filler content of 20–40 vol% was identified in eco-efficient OPC/EF/MF mixes. Optimized mortars exhibited reductions of up to 37% and 24% in CO2- and embodied energy-intensities, respectively, in comparison to standard OPC mortars.
KW - Mixture proportioning (A), Compressive strength (C), Filler (D), Cement paste (D), Green and sustainable cementitious materials (E)
KW - Cement paste (D)
KW - Mixture proportioning (A)
KW - Compressive strength (C)
KW - Filler (D)
KW - Green and sustainable cementitious materials (E)
UR - http://www.scopus.com/inward/record.url?scp=85065746087&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2019.05.001
DO - 10.1016/j.cemconres.2019.05.001
M3 - Article
SN - 0008-8846
VL - 122
SP - 157
EP - 178
JO - Cement and Concrete Research
JF - Cement and Concrete Research
ER -
