Article
Construction & Building Technology
Shubham Kumar Verma, Y. Anand, Navin Gupta, B. B. Jindal, V. V. Tyagi, S. Anand
Summary: This study aims to assess the role of building materials and ventilation systems in improving the hygrothermal characteristics of buildings for energy efficiency. The results demonstrate that selecting less sensitive, sustainable, and heat resistant building materials in the pre-construction phase can optimize building performance, and proper ventilation can aid in improving hygrothermal dynamics.
ENERGY AND BUILDINGS
(2022)
Article
Construction & Building Technology
Chi Feng, Hans Janssen
Summary: This study characterized the hygric properties of three porous building materials - calcium silicate, autoclaved aerated concrete and ceramic brick, using standardized experimental methods and recent novel techniques. The obtained data on moisture storage and transport properties throughout the full humidity range can be used as material data in hygrothermal simulations and as experimental benchmarks for the validation of material models, providing valuable insights for the scientific community.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Leticia C. M. Dafico, Eva Barreira, Ricardo M. S. F. Almeida, Romeu Vicente
Summary: This study utilizes machine learning models to predict moisture content based on surface temperature measurements. The results show that neural network models have high prediction accuracy, especially in brick and granite materials.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Mengli Zhou, Xiaolong Li, Chi Feng, Hans Janssen
Summary: The impact of reduced air pressure on hygric properties of porous building materials in high-altitude areas was investigated. Results showed limited influences on sorption isotherm, moisture retention curve, capillary absorption coefficient and capillary moisture content, while the vapor permeability increased significantly.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Xueqiong He, Huibo Zhang, Luo Qiu, Zhendong Mao, Chengnan Shi
Summary: The study investigated the moisture buffering properties and thermal performance of phase change materials with different substrates, and found that zeolite-based phase change microcapsule composites have the best humidity controlling performance and stability, making them the most suitable choice as temperature-humidity controlling building materials.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Mohammed-Hichem Benzaama, Lala Rajaoarisoa, Fouad Boukhelf, Yassine El Mendili
Summary: This research proposes a switching linear data-driven model for predicting the hygrothermal behavior in building envelopes. The model uses a discrete state and a switched detection approach for discrete-time linear switched systems, along with an additional variable with a discrete value. The study aims to fill the knowledge gap and address the limitations of data-driven models by providing a realistic explanation of the hygrothermal behavior of bio-based materials, identifying the hygroscopic mode, and estimating the process time of each phenomenon.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Rahma Belloum, Boudjemaa Agoudjil, Nawal Chennouf, Abderrahim Boudenne
Summary: The current research focuses on the development and application of bio-based materials in insulating and cost-effective construction. The study examines the impact of mass transfer on hygrothermal conditions and energy consumption in buildings made with date palm concrete (DPC). The results show that DPC exhibits superior hygrothermal performance and energy-saving characteristics compared to conventional construction materials.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Yuliang Zou, Geoffrey Promis, Frederic Grondin, Mazen Saad, Ahmed Loukili, Huan Wang
Summary: The hygrothermal behavior of porous building materials is influenced by moisture and heat transfer phenomena. This paper presents a model that considers both dynamic and hysteresis effects, improving accuracy in assessing the efficiency and sustainability of bio-based building materials.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Aimin Fang, Youming Chen, Lian Wu
Summary: The study presented a numerical model and analysis method for the hygrothermal behavior of building walls exposed to wind driven rain. The results show that wind driven rain has a significant influence on the hygrothermal performance of building walls, emphasizing the importance of incorporating it into hygrothermal transfer models for optimal design and accurate energy simulation in rainy areas.
ENERGY AND BUILDINGS
(2021)
Article
Engineering, Environmental
Dagmawi Mulugeta Degefu, Zaiyi Liao, Umberto Berardi, Greg Labbe, Irina Akhmetova
Summary: Geopolymers are materials that show promise for use in Net-Zero Buildings due to their low embodied energy and ability to passively control indoor microclimate. The influences of manufacturing parameters, such as initial water content and alkalinity, on the thermal, hydric, phase composition, and microstructure of aerated geopolymers were investigated. The results showed that these factors affect the properties of the geopolymers, but all the samples demonstrated potential for efficient modulation of indoor environment.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Construction & Building Technology
Mohamed Said Abbas, Fionn McGregor, Antonin Fabbri, Mohammed Yacine Ferroukhi, Celine Perlot
Summary: This paper experimentally assesses the impact of water content on the thermal properties of pith and hemp shiv composites. The results show that the thermal conductivity, thermal effusivity, heat capacity, and vapor permeability all increase with relative humidity. In addition, the study reveals that the specific heat capacity cannot always be deduced from the specific heat of water and dry material alone, and liquid water transport plays a significant role in moisture transfers.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Yaghoub Tadi Beni, Jaber Alihemmati
Summary: This paper analyzed the transient coupled heat and moisture transfer in cylindrical and cylindrical panels of porous medium using three-dimensional finite element methods. The study considered both DuFour and Soret effects, derived weak forms of the equations using the Galerkin method, and solved the obtained differential equations using the Runge-Kutta method. The results were compared with analytical solutions, showing good agreement and demonstrating the formulation's applicability for transient analysis in cylindrical geometries under various boundary conditions.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Thermodynamics
Kan Zu, Menghao Qin
Summary: Solid desiccant humidity pump is an emerging device that transports moisture through the inverse gradient of vapor concentration. Metal-organic frameworks are expected to enhance the performance of this device. In this study, the hygrothermal performance of a MOF-HP was analyzed using the CFD method. The validated model showed a 1.59 times improvement in moisture removal capacity after parametric optimization.
Article
Construction & Building Technology
Younhee Choi, Wanghee Cho, Akihito Ozaki, Haksung Lee
Summary: This study investigates the impact of moisture transfer from architectural materials on indoor humidity, comparing the simplified model and the detailed thermodynamic chemical potential model. Results show significant differences in humidity ratios and heat loads between the two models, confirming the importance of considering moisture effects in hygrothermal simulations.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Hayder Alsaad, Maria Hartmann, Conrad Voelker
Summary: Living walls can be used as decentralized systems to treat greywater locally. This study proposes a new approach by coupling ENVI-Met and Delphin to simulate the impact of plants on the hygrothermal performance of facades. The results show that living walls improve the thermal conductivity and surface temperature of walls, while eliminating the risk of moisture and condensation.
ENERGY AND BUILDINGS
(2022)
Article
Obstetrics & Gynecology
M. Noureldein, K. Hu, J. Groucutt, R. Heaver, K. Gurusamy
Summary: This article reviews the current practice and prevalence of paracetamol use for closing haemodynamically significant patent ductus arteriosus (hsPDA) in preterm infants in the UK. The results showed that 33% of neonatal units offer paracetamol treatment for hsPDA, with variations in dose, duration, and monitoring practices.
JOURNAL OF MATERNAL-FETAL & NEONATAL MEDICINE
(2022)
Article
Construction & Building Technology
Suelen Gasparin, Julien Berger, Rafik Belarbi, Denys Dutykh, Nathan Mendes
Summary: In this paper, the spectral method is developed as a reduced-order model for solving parametric problems within the building refurbishment framework. The proposed spectral reduced-order method integrates the unknown parameter as one of the coordinates of the decomposition and minimizes the residual using the Tau-Galerkin method and Collocation approach. The method is evaluated in terms of accuracy and computational time reduction in three different cases, showing accurate solutions and significant reduction in degrees of freedom.
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2023)
Article
Construction & Building Technology
Mohamed Sawadogo, Alexandre Godin, Marie Duquesne, Elodie Lacroix, Amelie Veillere, Ameur El Amine Hamami, Rafik Belarbi
Summary: The goal of this study is to explore the potential of natural fibers as support materials for phase change materials (PCMs) in buildings using shape-stabilization technique. Through the selection software Ansys Granta, four natural fibers (fir fibers, hemp fibers, hemp shives and flax mulch) were preliminarily chosen based on physical, thermal, geographical and economic criteria. After impregnating the candidate fibers with capric acid and lauric acid, their performances were compared and hemp shives with the highest impregnation rate of 50 wt% with lauric acid and good thermal stability under 150 degrees C were selected as the support material. Subsequently, hemp shives were impregnated with 5 different pure fatty acids and 7 eutectic mixtures to identify the best composite. Most of the developed composites exhibited latent heat higher than 50 J g(-1), showing great potential for energy storage in buildings. Considering the thermal requirements, such as high latent heat, low undercooling and fusion temperature ranging from 15 to 45 degrees C, lauric acid hemp shives composites were selected as potential materials for buildings application with promising performances (fusion enthalpy of 79.31 J g(-1) at 50 wt% impregnation rate).
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Ahmad Deeb, Ferhat Benmahiddine, Julien Berger, Rafik Belarbi
Summary: This paper proposes a new mathematical model of hysteresis and incorporates it into a hygrothermal model to reduce the discrepancy between numerical and experimental results and accurately predict the durability of building materials. The model is based on the symmetry property of sorption curves and uses a homotopic transformation relative to a parameter S∈[0, 1]. The results show that the model reliably predicts hysteresis loops of various materials and outperforms other existing models.
JOURNAL OF BUILDING PHYSICS
(2023)
Article
Construction & Building Technology
Mojtaba Kohandelnia, Masoud Hosseinpoor, Ammar Yahia, Rafik Belarbi
Summary: In this study, the workability, drying shrinkage, and compressive strength of self-consolidating earth concrete (SCEC) mixtures were evaluated using a new concrete-equivalent mortar (CEM) approach. This approach optimized the excess paste (EP) thickness based on the variation of packing density of the granular skeleton. Good correlations between the investigated CEMs and their corresponding concrete mixtures were established. The main influencing parameters on workability, drying shrinkage, and compressive strength of SCEC include the specific surface area and Atterberg limits of the ternary binder system, water-to-powder ratio (W/P), paste volume, and EP thickness.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Editorial Material
Energy & Fuels
Seif Khiati, Rafik Belarbi, Ammar Yahia
Article
Computer Science, Interdisciplinary Applications
Ahmad Deeb, Omar Kalaoun, Rafik Belarbi
Summary: For a physical problem described by a parameterized mathematical model, the parametric solution is a suitable alternative to solve the problem, as solving a direct problem for each parameter configuration would be time-consuming. In this paper, the Proper Generalized Decomposition (PGD) method is used to solve non-linear diffusion equations and produce parametric solutions. The non-linear terms are replaced by their Taylor series expansion up to an order m to handle them. The numerical simulations are conducted for a non-linear diffusion equation with exponential and magnetic diffusion coefficients.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2023)
Article
Engineering, Chemical
Mojtaba Kohandelnia, Masoud Hosseinpoor, Ammar Yahia, Rafik Belarbi
Summary: Self-consolidating earth concrete (SCEC) is a new alternative for earth-based construction. A concrete-equivalent mortar (CEM) approach with constant excess-paste (EP) thickness was proposed to evaluate the rheological and thixotropic properties of different SCEC mixtures. The use of certain superplasticizer types and clay led to thixotropic behavior, while mixtures with sodium hexametaphosphate had high yield stress and plastic viscosity values. Empirical models were developed to predict the rheology of earth-based paste, CEM, and SCEC mixtures based on key mixture parameters.
Article
Construction & Building Technology
Mojtaba Kohandelnia, Masoud Hosseinpoor, Ammar Yahia, Rafik Belarbi
Summary: This study investigates the hygrothermal and microstructural characteristics of self-consolidating earth concrete (SCEC). The results show that SCEC has lower water content and higher permeability compared to self-consolidating concrete (SCC). The study also reveals that SCEC has lower thermal conductivity and higher thermal effusivity.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
S. Bourbia, H. Kazeoui, R. Belarbi
Summary: This paper provides an overview of the latest research and applications of bio-based materials used in building construction. The materials discussed include hemp, wood, date palm wood, cork, alfa, and straw. Through a literature study, the aim is to understand the current state of theoretical and experimental studies on the hygrothermal characteristics, thermal, and energy performances of these materials. This is the first part of a research work contributing to the development of a new bio-based construction material for building applications.
MATERIALS FOR RENEWABLE AND SUSTAINABLE ENERGY
(2023)
Review
Energy & Fuels
Yara Nasr, Henri El Zakhem, Ameur El Amine Hamami, Makram El Bachawati, Rafik Belarbi
Summary: This literature review provides a comprehensive overview of the hygrothermal characteristics, thermal performance, and energy use of sustainable building materials. It compiles the most important research findings on these materials' capabilities for building construction and their contributions and effects on energy performance and thermal insulation.
Article
Thermodynamics
A. Charaka, J. Berger, F. Benmahiddine, R. Belarbi
Summary: Similarity law establishes equivalences between different configurations based on mathematical mapping and dimensionless formulation of the physical model. It is widely used in scientific fields like computational fluid dynamics. This study experimentally verifies similarities in heat and moisture transfer using hemp concrete and reducing the duration of a reference experiment. The results show good agreement between the reference and reduced configurations, with discrepancies within the calculated confidence intervals.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Polymer Science
Anis Bahar, Ameur El Amine Hamami, Ferhat Benmahiddine, Sofiane Belhabib, Rafik Belarbi, Sofiane Guessasma
Summary: This study aimed to explore the potential of wood-based composites processed using additive manufacturing as insulators in the building sector. The thermal and mechanical properties of a PLA blend with wood particles were tested under different processing conditions. The results showed that the printing process slightly affected its tensile performance, while the printing temperature had no significant influence on stiffness but had a limited effect on other engineering constants. The thermal properties of printed structures were found to depend on the infill rate, but the performance of the 3D printed wood-PLA material was still lower compared to traditional insulators like glass wool and synthetic foams used in buildings.
Article
Construction & Building Technology
Akli Younsi, Mohammed Amar Mahi, Ameur El Amine Hamami, Rafik Belarbi, Emilio Bastidas-Arteaga
Summary: This experimental study analyzed the role of different granularities of recycled waste glass powder (RWGP) on the short- and medium-term properties of cement-based materials. The results showed that coarser RWGP granularity increased fluidity and Portlandite content, while decreasing water demand and mechanical properties. However, this range of granularities had little effect on initial setting time, density, hydration temperature, and water porosity. Therefore, the choice of RWGP granularity should be based on the desired properties of the cement-based material.
Proceedings Paper
Construction & Building Technology
Ferhat Benmahiddine, Rafik Belarbi, Abdelkader Tahakourt
Summary: The incorporation of waste plant particles in a cementitious matrix has resulted in high-performance materials with economic and ecological benefits. This study characterizes the hydric and mechanical properties of a new material composed of flax shives, and compares it with hemp concrete. The results show that the flax concrete has good hydric behavior and similar properties to standardized hemp concrete.
PROCEEDINGS OF THE 75TH RILEM ANNUAL WEEK 2021
(2023)
