Print Email Facebook Twitter Hardening characterisation of a non-proprietary and more eco-friendly UHPC Title Hardening characterisation of a non-proprietary and more eco-friendly UHPC Author Matos, Ana Mafalda (Universidade do Porto) Granja, José (Universidade de Coimbra) Nunes, Sandra (TU Delft Concrete Structures; Universidade do Porto) Barroso-Aguiar, José L. (University of Minho) Azenha, Miguel (Universidade de Coimbra) Date 2023 Abstract The current work provides an integrated analysis of autogenous shrinkage, isothermal calorimetry, and modulus of elasticity measurement through ambient response method (EMM-ARM), to characterise the hardening behaviour of a non-proprietary and more eco-friendly ultra-high performance fibre reinforced cementitious composite (UHPFRC). Isothermal calorimetry revealed that induction period ends at 3 h, and the rapid evolution of hydration heat occurs up to 9 h. Then, the hydration reaction still undergoes but at a very slow rate. The autogenous shrinkage exhibited a strong increase, particularly in the first 6 h, after which a dramatic reduction in the slope of the curves occurred, corroborating with the heat of hydration measurements. The modulus of elasticity evolution pattern revealed a typical cementitious material S-shaped curve, with a strong evolution in the first 8 h and reached 37 GPa at 7 days. As the current study perceives, UHPC/UHPFRC-3 % MOE evolution mainly occurs at very early ages. Thus, using EMM-ARM method for evaluating stiffness-related properties since casting age of UHPC/UHPFRC is of utmost importance to take advantage of the remarkable properties of such advanced material with no waste of time and resources. Furthermore, the UHPFRC developed with a lower amount of cement and silica fume decreases the heat of hydration, shrinkage, and reduced costs and ecological footprint without significantly impairing the MOE, compared to other non-proprietary blended UHPC/UHPFRC mixtures. Subject Autogenous shrinkageE-modulusHardeningIsothermal calorimetryUltra-high performance fibre reinforced cementitious composites (UHPFRC) To reference this document use: http://resolver.tudelft.nl/uuid:b15ffa41-b76c-4f5c-b327-3556d6ba1ce2 DOI https://doi.org/10.1016/j.conbuildmat.2022.129803 ISSN 0950-0618 Source Construction and Building Materials, 363 Part of collection Institutional Repository Document type journal article Rights © 2023 Ana Mafalda Matos, José Granja, Sandra Nunes, José L. Barroso-Aguiar, Miguel Azenha Files PDF 1_s2.0_S0950061822034596_main.pdf 6.75 MB Close viewer /islandora/object/uuid:b15ffa41-b76c-4f5c-b327-3556d6ba1ce2/datastream/OBJ/view