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Dr. Geoffrey PROMIS
Laboratoire des Technologies Innovantes (LTI), Université de Picardie Jules Verne, Amiens, Picardie, France

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0 Instrumentation
0 Thermal Comfort
0 mechanical characterization
0 Biobased materials
0 energy-efficient buildings

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Journal article
Published: 22 July 2021 in Sustainability
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The suitability of replacing mineral aggregate with carbon-negative ones mainly depends on the properties of the aggregates produced from waste recycling, reducing CO2 emissions. This study aimed to investigate the predictive approaches adapted to concrete mixtures where mineral aggregates are replaced by carbonated aggregates (at different substitution rates from 25 to 100% with aggregates of various origins). A large experimental campaign of aggregates and carbonated aggregate concretes highlighted their physical, mechanical, thermal and hygric properties and the influence of density and porosity of aggregates on these properties. Thanks to these results, predictive approaches were formulated to establish the main engineering properties: mechanical compressive strength, elasticity modulus, thermal conductivity, thermal mass capacity and hygric diffusivity. These empirical and analytical models were based on the density of aggregates. Maximum deviations of around 15% were obtained with the experimental data, highlighting the influence of grain density on carbonated aggregate concretes. These models could then be used to optimize the formulation of concrete mixtures with carbonated aggregates, replacing international standards adapted to mineral aggregates.

ACS Style

Imen Rahmouni; Geoffrey Promis; Omar Douzane; Frédéric Rosquoet. Grain Density-Based Approaches to Predict the Mechanical, Thermal and Hygric Properties of Carbon-Negative Aggregate Concretes. Sustainability 2021, 13, 8194 .

AMA Style

Imen Rahmouni, Geoffrey Promis, Omar Douzane, Frédéric Rosquoet. Grain Density-Based Approaches to Predict the Mechanical, Thermal and Hygric Properties of Carbon-Negative Aggregate Concretes. Sustainability. 2021; 13 (15):8194.

Chicago/Turabian Style

Imen Rahmouni; Geoffrey Promis; Omar Douzane; Frédéric Rosquoet. 2021. "Grain Density-Based Approaches to Predict the Mechanical, Thermal and Hygric Properties of Carbon-Negative Aggregate Concretes." Sustainability 13, no. 15: 8194.

Journal article
Published: 10 June 2021 in Energies
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Signs of wetness in housing are a significant obstacle to the renovation and energy rehabilitation of old and energy-intensive heritage buildings, especially in cold climates. Thus, in order to avoid the numerous possibilities of degradation caused by the moisture transfer phenomena in the building envelope, the a disruptive aeraulic process, which focuses on the ventilation of an air gap between the thermal insulation and the wet wall, has been designed and its assessed. This system avoids the presence of liquid water at the wall surface by maintaining the hygrothermal balance within the wet wall. This enables the mechanical durability of the supporting structure, the absence of biological activity and/or frost and, hence, the durability of the thermal insulation. These issues are investigated through a case study based on a real site. Over a year of measurements, the wet wall was constantly maintained in hygroscopic balance, around 90% RH, guaranteeing the preservation of its mechanical performance, while the insulation layer was kept moisture free. In addition, the proposed model for predicting the appearance and development of biological activity demonstrated its validity, confirming experimental results.These initial results will now lead to the optimization of the aeraulic device, as well as possible use in a summer cooling context to achieve hygrothermal comfort for housing occupants.

ACS Style

Geoffrey Promis; Omar Douzane; Daniel Rousse; Thierry Langlet. An Innovative System for the Treatment of Rising Dampness in Buildings Located in Cold Climates. Energies 2021, 14, 3421 .

AMA Style

Geoffrey Promis, Omar Douzane, Daniel Rousse, Thierry Langlet. An Innovative System for the Treatment of Rising Dampness in Buildings Located in Cold Climates. Energies. 2021; 14 (12):3421.

Chicago/Turabian Style

Geoffrey Promis; Omar Douzane; Daniel Rousse; Thierry Langlet. 2021. "An Innovative System for the Treatment of Rising Dampness in Buildings Located in Cold Climates." Energies 14, no. 12: 3421.

Journal article
Published: 10 June 2021 in Applied Sciences
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The use of bio-based materials (BBM) in buildings is an interesting solution as they are eco-friendly materials and have low embodied energy. This article aims to investigate the hygric performance of two bio-based materials: palm and sunflower concretes. The moisture buffering value (MBV) characterizes the ability of a material or multilayer component to moderate the variation in the indoor relative humidity (RH). In the literature, the moisture buffer values of bio-based concretes were measured at a constant temperature of 23 °C. However, in reality, the indoor temperature of the buildings is variable. The originality of this article is found in studying the influence of the temperature on the moisture buffer performance of BBM. A study at wall scale on its impact on the indoor RH at room level will be carried out. First, the physical models are presented. Second, the numerical models are implemented in the Simulation Problem Analysis and Research Kernel (SPARK) suited to complex problems. Then, the numerical model validated with the experimental results found in the literature is used to investigate the moisture buffering capacity of BBM as a function of the temperature and its application in buildings. The results show that the temperature has a significant impact on the moisture buffering capacity of bio-based building materials and its capacity to dampen indoor RH variation. Using the numerical model presented in this paper can predict and optimize the hygric performance of BBM designed for building application.

ACS Style

Fathia Igue; Anh Tran Le; Alexandra Bourdot; Geoffrey Promis; Sy Nguyen; Omar Douzane; Laurent Lahoche; Thierry Langlet. Impact of Temperature on the Moisture Buffering Performance of Palm and Sunflower Concretes. Applied Sciences 2021, 11, 5420 .

AMA Style

Fathia Igue, Anh Tran Le, Alexandra Bourdot, Geoffrey Promis, Sy Nguyen, Omar Douzane, Laurent Lahoche, Thierry Langlet. Impact of Temperature on the Moisture Buffering Performance of Palm and Sunflower Concretes. Applied Sciences. 2021; 11 (12):5420.

Chicago/Turabian Style

Fathia Igue; Anh Tran Le; Alexandra Bourdot; Geoffrey Promis; Sy Nguyen; Omar Douzane; Laurent Lahoche; Thierry Langlet. 2021. "Impact of Temperature on the Moisture Buffering Performance of Palm and Sunflower Concretes." Applied Sciences 11, no. 12: 5420.

Journal article
Published: 30 November 2018 in Construction and Building Materials
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Hemp and rape straw concretes are bio-based building materials with excellent hygrothermal behaviour and low environmental impact compared to conventional concretes. Their hygroscopic capacity can improve indoor comfort by regulating temperature and relative humidity levels. This buffering ability can be expressed by sorption curves which correlate moisture content at different relative humiditiy levels. However, sorption isotherms vary according to temperature revealing the importance of taking into account heat transfer in sorption phenomena. Therefore, aiming to accurately model sorption curves considering temperature and hysteresis influence, this study compares four different temperature-dependent models (Poyet, Milly, Staudt and modified GAB) to better describe the hygroscopic behaviour of bio-based materials. Results show that, when compared to experimental values, the modified GAB model exhibited the best statistical agreement. Poyet and Milly remained coherent with empirical results, nevertheless, Staudt’s approach is far from experimental data. The isosteric heat of sorption and the theory of compensation are used to shed a new light on results discrepancy. This work also points out that the robustness of analysis is highly related to the initial parameters of accuracy given by GAB fitting.

ACS Style

G. Promis; L. Freitas Dutra; O. Douzane; A.D. Tran Le; T. Langlet. Temperature-dependent sorption models for mass transfer throughout bio-based building materials. Construction and Building Materials 2018, 197, 513 -525.

AMA Style

G. Promis, L. Freitas Dutra, O. Douzane, A.D. Tran Le, T. Langlet. Temperature-dependent sorption models for mass transfer throughout bio-based building materials. Construction and Building Materials. 2018; 197 ():513-525.

Chicago/Turabian Style

G. Promis; L. Freitas Dutra; O. Douzane; A.D. Tran Le; T. Langlet. 2018. "Temperature-dependent sorption models for mass transfer throughout bio-based building materials." Construction and Building Materials 197, no. : 513-525.

Journal article
Published: 01 May 2018 in Energy and Buildings
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Bio-based materials are increasingly present in the constitution of the building envelops thanks to their numerous advantages such as good thermo-hygric performances, weak environmental impact, efficient regulation of the perceived indoor air quality and human comfort... The analysis of moisture transfer is necessary to increase the efficiency of these materials and to ensure building sustainability. Actually, most of hygrothermal models neglect the moisture hysteresis effect, arguing the weak impact on the obtained results. Thus, a 3D numerical model was built on COMSOL Multiphysics, taking into account the hysteresis phenomenon to assess the impact of hysteresis effects. The model was validated thanks to experimental tests performed on hemp concrete and rape straw concrete. Tests were carried out under various dynamic hygric solicitations, with a regulated climatic chamber. The results have been compared in steady and transient states, with and without the effect of moisture hysteresis. Results have shown that hysteresis could be neglected in steady state, if the relative humidity range did not reach the capillary condensation. In this case, a model based on the main adsorption isotherm could lead to reasonable approximation, with weak calculation costs. For the analysis of a wall under real climatic solicitations, which corresponds to a non-steady state, neglecting the moisture hysteresis could lead to significant discrepancies, especially in terms of sample moist mass (and consequently moisture content or absolute humidity).

ACS Style

G. Promis; O. Douzane; A.D. Tran Le; T. Langlet. Moisture hysteresis influence on mass transfer through bio-based building materials in dynamic state. Energy and Buildings 2018, 166, 450 -459.

AMA Style

G. Promis, O. Douzane, A.D. Tran Le, T. Langlet. Moisture hysteresis influence on mass transfer through bio-based building materials in dynamic state. Energy and Buildings. 2018; 166 ():450-459.

Chicago/Turabian Style

G. Promis; O. Douzane; A.D. Tran Le; T. Langlet. 2018. "Moisture hysteresis influence on mass transfer through bio-based building materials in dynamic state." Energy and Buildings 166, no. : 450-459.

Journal article
Published: 01 March 2017 in Energy and Buildings
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ACS Style

M. Rahim; O. Douzane; A.D. Tran Le; G. Promis; T. Langlet. Experimental investigation of hygrothermal behavior of two bio-based building envelopes. Energy and Buildings 2017, 139, 608 -615.

AMA Style

M. Rahim, O. Douzane, A.D. Tran Le, G. Promis, T. Langlet. Experimental investigation of hygrothermal behavior of two bio-based building envelopes. Energy and Buildings. 2017; 139 ():608-615.

Chicago/Turabian Style

M. Rahim; O. Douzane; A.D. Tran Le; G. Promis; T. Langlet. 2017. "Experimental investigation of hygrothermal behavior of two bio-based building envelopes." Energy and Buildings 139, no. : 608-615.

Journal article
Published: 01 December 2016 in Composite Structures
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ACS Style

G. Promis; A. Si Larbi; O. Douzane. Numerical and experimental investigation into the behaviour of strengthened hollow box beams made of unidirectional fibre-reinforced IPC matrix composite. Composite Structures 2016, 157, 87 -94.

AMA Style

G. Promis, A. Si Larbi, O. Douzane. Numerical and experimental investigation into the behaviour of strengthened hollow box beams made of unidirectional fibre-reinforced IPC matrix composite. Composite Structures. 2016; 157 ():87-94.

Chicago/Turabian Style

G. Promis; A. Si Larbi; O. Douzane. 2016. "Numerical and experimental investigation into the behaviour of strengthened hollow box beams made of unidirectional fibre-reinforced IPC matrix composite." Composite Structures 157, no. : 87-94.

Journal article
Published: 01 February 2015 in Energy and Buildings
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ACS Style

Mourad Rahim; O. Douzane; A.D. Tran Le; G. Promis; B. Laidoudi; A. Crigny; B. Dupre; T. Langlet. Characterization of flax lime and hemp lime concretes: Hygric properties and moisture buffer capacity. Energy and Buildings 2015, 88, 91 -99.

AMA Style

Mourad Rahim, O. Douzane, A.D. Tran Le, G. Promis, B. Laidoudi, A. Crigny, B. Dupre, T. Langlet. Characterization of flax lime and hemp lime concretes: Hygric properties and moisture buffer capacity. Energy and Buildings. 2015; 88 ():91-99.

Chicago/Turabian Style

Mourad Rahim; O. Douzane; A.D. Tran Le; G. Promis; B. Laidoudi; A. Crigny; B. Dupre; T. Langlet. 2015. "Characterization of flax lime and hemp lime concretes: Hygric properties and moisture buffer capacity." Energy and Buildings 88, no. : 91-99.