Simulation of the hydration kinetics and elastic moduli of cement mortars by microstructural modelling

Valentini, Luca; Parisatto, Matteo; Russo, Vincenzo; Ferrari, Giorgio; Bullard, Jeffrey W.; Angel, R. J.; Dalconi, Maria Chiara; Artioli, Gilberto

doi:10.1016/j.cemconcomp.2014.05.005

Cited by 31 publications

(26 citation statements)

References 36 publications

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“…Additionally, although previous works [32] proved that both elastic modulus types are physically related, we were not able to determine the static elastic modulus from the compressive test (E c ), knowing the dynamic elastic modulus from ultrasonic tests (E u ). With the aim of demonstrating this, Figure 11 shows the relationship between the elastic modulus obtained from compressive and ultrasonic tests, measured on the same test specimen for all the specimens tested.…”

Section: Influence Of Metallic Waste On the Elastic Modulus Of The Tementioning

confidence: 87%

“…In this study, the Poisson's ratio value of all cement mortar specimens with and without metallic waste was considered equal to 0.20, according to Valentini et al [32]. Finally, the representative value of the dynamic elastic modulus (E u ), measured in MPa, was determined as the average of the 24 cubic specimens for each mortar mixture and curing age.…”

Section: Dynamic Elastic Modulus Measurement By Ultrasonic Testmentioning

confidence: 99%

“…Theoretically, the static compressive test considers the whole mechanical behaviour of materials, i.e., a stress-strain curve with a non-linear component. Nevertheless, the non-destructive method using ultrasonic tests evaluates the mechanical behaviour of materials just in the linear zone of the stress-strain curve, since it is a short time and high frequency test [32].…”

Section: Influence Of Metallic Waste On the Elastic Modulus Of The Tementioning

confidence: 99%

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Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

et al. 2018

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Featured Application: The development of advance construction materials based on waste valorisation is a reality. The cement-based mortar with recycled metallic waste presented in this study could be potentially used as a building material with crack self-monitoring properties.Abstract: This paper investigates the influence of the type and amount of recycled metallic waste on the physical and mechanical properties of cement-based mortars. The physical and mechanical properties of cement mortars, containing four different amounts of metallic waste (ranged 4 to 16% by cement weight), were evaluated by measuring the bulk density, total porosity, flexural and compressive resistance, and dynamic elastic modulus by ultrasonic tests. All the properties were measured on test specimens under two curing ages: 7 and 28 days. Additionally, the morphological properties and elemental composition of the cement and metallic waste were evaluated by using Scanning Electron Microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS), and X-ray fluorescence (XRF). Main results showed that the addition of metallic waste reduced the bulk density and increased the porosity of the cement-based mortars. Furthermore, it was observed that flexural and compressive strength proportionally increased with the metallic waste addition. Likewise, it was proven that elastic modulus, obtained by compressive and ultrasonic tests, increases with the metallic waste amount. Finally, based on a probability analysis, it was confirmed that the addition of metallic waste did not present a significant effect on the mechanical performance of the cement-based mortars.

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Section: Influence Of Metallic Waste On the Elastic Modulus Of The Tementioning

confidence: 87%

Section: Dynamic Elastic Modulus Measurement By Ultrasonic Testmentioning

confidence: 99%

Section: Influence Of Metallic Waste On the Elastic Modulus Of The Tementioning

confidence: 99%

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Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

et al. 2018

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“…The simulated microstructure is used as an input to a FEM module that calculates effective elastic moduli by minimizing the total elastic energy in response to an applied displacement [23]. The intrinsic elastic moduli associated with the different phases are reported elsewhere [22]. Auto-correlation functions are used to spatially distribute the individual clinker phases within the cement particles [24].…”

Section: 5mentioning

confidence: 99%

“…Cement hydration was simulated using the Virtual Cement and Concrete Testing Laboratory (VCCTL) model [21], developed at NIST and modified at the Department of Geosciences, University of Padua [22]. The simulated microstructure is used as an input to a FEM module that calculates effective elastic moduli by minimizing the total elastic energy in response to an applied displacement [23].…”

Section: 5mentioning

confidence: 99%

Numerical benchmark campaign of COST Action TU1404 – microstructural modelling

Wyrzykowski

Sanahuja²,

Charpin³

et al. 2017

RILEM Tech Lett

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This paper presents the results of the numerical benchmark campaign on modelling of hydration and microstructure development of cementitious materials. This numerical benchmark was performed in the scope of COST Action TU1404 "Towards the next generation of standards for service life of cement-based materials and structures". Seven modelling groups took part in the campaign applying different models for prediction of mechanical properties (elastic moduli or compressive strength) in cement pastes and mortars. The simulations were based on published experimental data. The experimental data (both input and results used for validation) were open to the participants. The purpose of the benchmark campaign was to identify the needs of different models in terms of input experimental data, verify predictive potential of the models and finally to provide reference cases for new models in the future. The results of the benchmark show that a relatively high scatter in the predictions can arise between different models, in particular at early ages (e.g. elastic Young's modulus predicted at 1 d in the range 6-20 GPa), while it reduces at later age, providing relatively good agreement with experimental data. Even though the input data was based on a single experimental dataset, the large differences between the results of the different models were found to be caused by distinct assumed properties for the individual phases at the microstructural level, mainly because of the scatter in the nanoindentation-derived properties of the C-S-H phase.

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The role of surface micro-cracks in cementitious materials responsible for the Pickett effect

Rhardane

Alam

Grondin

2021

Mech Time-Depend Mater

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Simulation of the hydration kinetics and elastic moduli of cement mortars by microstructural modelling

Cited by 31 publications

References 36 publications

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

Numerical benchmark campaign of COST Action TU1404 – microstructural modelling

The role of surface micro-cracks in cementitious materials responsible for the Pickett effect

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