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Polidori G, Aras-Gaudry A, Beaumont F, Bogard F, Murer S, Lachi M, Maalouf C, Moussa T, Bliard C, Fronteau G, Hamard E. Adobe Bricks of the Champagne Region (France): Characterization of a Chalky Raw Earth Construction Material. Materials (Basel) 2024; 17:2307. [PMID: 38793375 DOI: 10.3390/ma17102307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/07/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024]
Abstract
Raw earth bricks made from the soil of the Chalky Champagne region (France) have been used for at least two millennia in construction, a promising heritage in the context of reducing the carbon emissions of buildings. The present experimental study aims to measure the physical, mechanical, thermal, and hydric properties of adobes collected from a local village barn. The results show a high chalk content, estimated at 71%, and a clay content, acting as a binder, of 14%. Despite limited load-bearing capacity, these lightweight adobes are suitable for current single-story constructions, while their hydrothermal properties classify them as excellent moisture regulators for occupants. In association with other bio-sourced materials such as starch-beet pulp bricks, Chalky Champagne adobes yield promising insulating properties, and meet the criteria defined by current energy standards.
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Affiliation(s)
- Guillaume Polidori
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Adrien Aras-Gaudry
- Université de Reims Champagne-Ardenne, Groupe d'Étude sur les Géomatériaux et ENvironnements Anthropisés (GEGENA), F-51100 Reims, France
| | - Fabien Beaumont
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Fabien Bogard
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Sébastien Murer
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Mohammed Lachi
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Chadi Maalouf
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Tala Moussa
- Université de Reims Champagne-Ardenne, Institut de Thermique, Mécanique, Matériaux (ITheMM), F-51100 Reims, France
| | - Christophe Bliard
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR 7312 CNRS, F-51100 Reims, France
| | - Gilles Fronteau
- Université de Reims Champagne-Ardenne, Groupe d'Étude sur les Géomatériaux et ENvironnements Anthropisés (GEGENA), F-51100 Reims, France
| | - Erwan Hamard
- Université Gustave Eiffel, Matériaux et Structures-Granulats et Procédés d'Élaboration des Matériaux (MAST-GPEM), F-44340 Bouguenais, France
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2
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Latif E. Experimental Analysis of Moisture-Dependent Thermal Conductivity, and Hygric Properties of Novel Hemp-shive Insulations with Numerical Assessment of Their In-Built Hygrothermal and Energy Performance. Materials (Basel) 2024; 17:486. [PMID: 38276425 PMCID: PMC10817683 DOI: 10.3390/ma17020486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
The use of lime as a binder in hemp-lime considerably increases the drying time of hemp-lime after casting. Furthermore, lime is a non-renewable mineral resource. As such, this paper explores the effectiveness of using an alternative non-mineral binder instead of lime to formulate a novel hemp-shive insulation. The moisture-dependent thermal conductivity, adsorption isotherm, vapour diffusion resistance factor, and in-built hygrothermal performance of four variants of a novel bio-based insulation were investigated. The hygrothermal performance of the novel hemp-shive insulation was compared with that of a previously developed novel hemp-lime insulation. No significant variation in thermal conductivity of hemp-shive insulations between the equilibrium moisture contents (EMC) at 0% and 50% relative humidity (RH) was observed, but there was a substantial increase in thermal conductivity hemp-shive insulations when the material reached the EMC at 98% RH. The average dry thermal conductivity values of hemp-shive and hemp-lime insulations were also similar. The adsorption isotherms of hemp-shive insulations were determined at 0%, 20%, 50%, 70%, 90%, and 98% relative humidity steps. At 98% RH, the moisture adsorption capacity of hemp-shive insulations was 4-to-5-times higher than that of hemp-lime insulation. Hemp-shive insulations' vapour diffusion resistance factor (µ value) was about double the µ value of hemp-lime insulation. Hemp-shive insulations exhibited 4-to-5-times higher water absorption resistance than that of hemp-lime insulation. Numerically determined porosity values of hemp-shive agree with the values of wood-based insulation materials of similar density. Finally, using all experimentally acquired data as inputs, dynamic whole-building hygrothermal simulations were carried out and the results show that novel hemp-shive insulation materials perform at a similar level to the hemp-lime insulation in terms of heating and cooling energy demand but require 45% less energy for humidification. However, the relative humidity inside the hemp-shive wall remains higher than 70%, which can potentially induce mould growth.
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Affiliation(s)
- Eshrar Latif
- Welsh School of Architecture, Cardiff University, Cardiff CF10 3NB, UK
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Badouard C, Maalouf C, Bliard C, Polidori G, Bogard F. Hygric Behavior of Viticulture By-Product Composites for Building Insulation. Materials (Basel) 2022; 15:ma15030815. [PMID: 35160758 PMCID: PMC8836677 DOI: 10.3390/ma15030815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/11/2022] [Accepted: 01/18/2022] [Indexed: 12/10/2022]
Abstract
One possible approach to reducing the environmental impacts associated with the building sector is the development and use of bio-based building materials. The objective of this study is to determine the water properties of bio-based insulation materials, derived from winegrowing co-products, which promote energy efficiency. The water performance of these new bio-based materials is based on the measurement of the moisture buffer value, the sorption isotherm, and the water vapor permeability. Four by-products are analyzed: stalks, grape pomace, crushed stalks, and skins; they are combined with a potato starch binder. The performance of these composites is compared to two other bio-based composites (hemp/starch and beet pulp/starch). The stalk/starch composite can be classified as a hygroscopic and breathable material with excellent moisture retention capacity.
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Affiliation(s)
- Céline Badouard
- MATériaux et Ingénierie Mécanique, MATIM, University of Reims Champagne Ardenne, CEDEX 2, 51687 Reims, France; (C.M.); (G.P.); (F.B.)
- Institut de Chimie Moléculaire de Reims, ICMR-UMR 7312 CNRS, University of Reims Champagne Ardenne, CEDEX 2, 51687 Reims, France;
- Pôle de Recherche Châlonnais, University of Reims Champagne Ardennes, 51000 Châlons-en-Champagne, France
- Correspondence:
| | - Chadi Maalouf
- MATériaux et Ingénierie Mécanique, MATIM, University of Reims Champagne Ardenne, CEDEX 2, 51687 Reims, France; (C.M.); (G.P.); (F.B.)
- SFR Condorcet—FR CNRS 3417, Centre de Recherche en Environnement et Agronomie (C.R.E.A.), 2 Esplanade Roland Garros, 51100 Reims, France
| | - Christophe Bliard
- Institut de Chimie Moléculaire de Reims, ICMR-UMR 7312 CNRS, University of Reims Champagne Ardenne, CEDEX 2, 51687 Reims, France;
| | - Guillaume Polidori
- MATériaux et Ingénierie Mécanique, MATIM, University of Reims Champagne Ardenne, CEDEX 2, 51687 Reims, France; (C.M.); (G.P.); (F.B.)
| | - Fabien Bogard
- MATériaux et Ingénierie Mécanique, MATIM, University of Reims Champagne Ardenne, CEDEX 2, 51687 Reims, France; (C.M.); (G.P.); (F.B.)
- Pôle de Recherche Châlonnais, University of Reims Champagne Ardennes, 51000 Châlons-en-Champagne, France
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Kočí V, Kočí J, Fořt J, Fiala L, Šál J, Hager I, Černý R. Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts. Materials (Basel) 2021; 14:ma14237361. [PMID: 34885513 PMCID: PMC8658445 DOI: 10.3390/ma14237361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/03/2021] [Accepted: 11/29/2021] [Indexed: 01/18/2023]
Abstract
Production of concrete is connected to extensive energy demands, greenhouse gases production or primary sources depletion. Reflecting current economical, social, or environmental trends, there is strong pressure on mitigation these requirements and impacts. The exploitation of secondary- or waste materials in production processes has therefore a great potential which is not related solely to binders but also to fillers. In this light, this paper aims at thorough investigations of concrete mixtures with crushed concrete pavements as partial or full replacement of natural coarse aggregates. The research combines experimental techniques to quantify the influence of the substitution on basic physical, mechanical, and heat/moisture transport/storage parameters. The experimental data obtained are further exploited as input data for computational prediction of coupled heat and moisture transport to assess the influence of the aggregates substitution on hygrothermal performance of the built-in concretes. In the last step, the environmental impacts are assessed. Since the changes in the hygrothermal performance were found to be insignificant (i), the compressive strength were improved by up to 25% (ii) and most of the environmental impact indicators were decreased (iii) at the same time, the findings of the research presented predeterminate such a reuse strategy to wider application and use.
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Affiliation(s)
- Václav Kočí
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7/2077, 166 29 Prague 6, Czech Republic; (J.K.); (J.F.); (L.F.); (R.Č.)
- Correspondence: ; Tel.: +420-2-2435-7125
| | - Jan Kočí
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7/2077, 166 29 Prague 6, Czech Republic; (J.K.); (J.F.); (L.F.); (R.Č.)
| | - Jan Fořt
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7/2077, 166 29 Prague 6, Czech Republic; (J.K.); (J.F.); (L.F.); (R.Č.)
| | - Lukáš Fiala
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7/2077, 166 29 Prague 6, Czech Republic; (J.K.); (J.F.); (L.F.); (R.Č.)
| | - Jiří Šál
- Institute of Technology and Business in České Budějovice, Okružní 517/10, 370 01 České Budějovice, Czech Republic;
| | - Izabela Hager
- Faculty of Civil Engineering, Cracow University of Technology, 24 Warszawska St., 31-155 Cracow, Poland;
| | - Robert Černý
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7/2077, 166 29 Prague 6, Czech Republic; (J.K.); (J.F.); (L.F.); (R.Č.)
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Pavlíková M, Kapicová A, Pivák A, Záleská M, Lojka M, Jankovský O, Pavlík Z. Zeolite Lightweight Repair Renders: Effect of Binder Type on Properties and Salt Crystallization Resistance. Materials (Basel) 2021; 14:ma14133760. [PMID: 34279331 PMCID: PMC8269796 DOI: 10.3390/ma14133760] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/01/2021] [Accepted: 07/01/2021] [Indexed: 12/18/2022]
Abstract
Rendering mortars with lightweight zeolite aggregates were designed and tested. The effect of the type of binder used was also researched. For the hardened mortars, macrostructural parameters, mechanical characteristics, hygric and thermal properties were assessed. Specific attention was paid to the analysis of the salt crystallization resistance of the developed rendering mortars. Quartz sand was fully replaced in the composition of mortars with zeolite gave materials with low density, high porosity, sufficient mechanical strength, high water vapor permeability and high water absorption coefficient, which are technical parameters required for repair rendering mortars as prescribed in the WTA directive 2-9-04/D and EN 998-1. Moreover, the zeolite enhanced mortars exhibit good thermal insulation performance and high sorption capacity. The examined rendering mortars were found to be well durable against salt crystallization, which supports their applicability in salt-laden masonry. Based on the compatibility of the repair materials with those originally used, the lime and natural hydraulic lime zeolite mortars can be used as rendering mortars for the repair of historical and heritage buildings. The cement-lime zeolite render is applicable for repair purposes only in the case of the renewal of masonry in which Portland cement-based materials were originally used.
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Affiliation(s)
- Milena Pavlíková
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (M.P.); (A.K.); (A.P.); (M.Z.)
| | - Adéla Kapicová
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (M.P.); (A.K.); (A.P.); (M.Z.)
| | - Adam Pivák
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (M.P.); (A.K.); (A.P.); (M.Z.)
| | - Martina Záleská
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (M.P.); (A.K.); (A.P.); (M.Z.)
| | - Michal Lojka
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (M.L.); (O.J.)
| | - Ondřej Jankovský
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (M.L.); (O.J.)
| | - Zbyšek Pavlík
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (M.P.); (A.K.); (A.P.); (M.Z.)
- Correspondence: ; Tel.: +420-224-354-371
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Du C, Li B, Yu W, Cai J, Wang L, Li X, Yao Y, Li B. Evaluating the effect of building construction periods on household dampness/mold and childhood diseases corresponding to different energy efficiency design requirements. Indoor Air 2021; 31:541-556. [PMID: 32731305 DOI: 10.1111/ina.12723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/31/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
Despite concerns about building dampness and children' health, few studies have examined the effects of building energy efficiency standards. This study explored the connections between self-reported household dampness and children' adverse health outcomes across buildings corresponding to construction periods (pre-2001, 2001-2010, post-2010). Significant differences of dampness-related indicators were found between buildings; the prevalence was remarkable in pre-2001 buildings. The prevalence of lifetime-ever doctor-diagnosed diseases for children was significantly associated with building dampness (adjust odd ratios > 1), but was not affected by construction periods. The hygrothermal performance for a typical residence was simulated, varying in U-values of envelopes and air change rates. The simulated performance improvement increased indoor temperatures in 2001-2010 and post-2010 buildings. The frequency with higher indoor relative humidity was higher in pre-2001 buildings, leading to the highest values for maximum mold index (Mmax ) on wall surface, especially in winter. Compared to buildings in 2001-2010, increased insulation and lower air change rate led to a relatively higher relative humidity in post-2010 buildings, adversely increasing the Mmax values. The findings addressed the positive and negative role of building standard development, which help suggesting appropriate environmental and design solutions to trade-off energy savings and dampness/mold risk in residences.
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Affiliation(s)
- Chenqiu Du
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
| | - Baizhan Li
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
| | - Wei Yu
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
| | - Jiao Cai
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
| | - Lexiang Wang
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
| | - Xinyi Li
- Department of Civil and Structural Engineering, Sheffield University, Sheffield, UK
| | - Yinghui Yao
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
| | - Bicheng Li
- Joint International Research Laboratory of Green Buildings and Built Environments, Ministry of Education, Chongqing University, Chongqing, China
- National Centre for International Research of Low-carbon and Green Buildings, Ministry of Science and Technology, Chongqing University, Chongqing, China
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Pivák A, Pavlíková M, Záleská M, Lojka M, Lauermannová AM, Faltysová I, Jankovský O, Pavlík Z. Foam Glass Lightened Sorel's Cement Composites Doped with Coal Fly Ash. Materials (Basel) 2021; 14:1103. [PMID: 33652947 DOI: 10.3390/ma14051103] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 12/27/2022]
Abstract
Lightweight Sorel’s cement composites doped with coal fly ash were produced and tested. Commercially available foam granulate was used as lightening aggregate. For comparison, reference composites made of magnesium oxychloride cement (MOC) and quartz sand were tested as well. The performed experiments included X-ray diffraction, X-ray fluorescence, scanning electron microscopy, light microscopy, and energy dispersive spectroscopy analyses. The macro- and microstructural parameters, mechanical resistance, stiffness, hygric, and thermal parameters of the 28-days matured composites were also researched. The combined use of foam glass and fly ash enabled to get a material of low weight, high porosity, sufficient strength and stiffness, low water imbibition, and greatly improved thermal insulation performance. The developed lightweight composites can be considered as further step in the design and production of alternative and sustainable materials for construction industry.
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Iffa E, Tariku F, Simpson WY. Highly Insulated Wall Systems with Exterior Insulation of Polyisocyanurate under Different Facer Materials: Material Characterization and Long-Term Hygrothermal Performance Assessment. Materials (Basel) 2020; 13:E3373. [PMID: 32751481 DOI: 10.3390/ma13153373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/23/2020] [Accepted: 07/24/2020] [Indexed: 11/24/2022]
Abstract
The application of exterior insulation in both new construction and retrofits is a common practice to enhance the energy efficiency of buildings. In addition to increased thermal performance, the rigid insulation can serve to keep the sheathing board warm and serve as a water-resistive barrier to keep moisture-related problems due to condensation and wind-driven rain. Polyisocyanurate (PIR) rigid boards have a higher thermal resistance in comparison to other commonly used exterior insulation boards. However, because of its perceived lower permeance, its use as exterior insulation is not very common. In this study, the hygrothermal property of PIR boards with different facer types and thicknesses is characterized. The material data obtained through experimental test and extrapolation is used in a long term hygrothermal performance assessment of a wood frame wall with PIR boards as exterior insulation. Results show that PIR with no facer has the smallest accumulated moisture on the sheathing board in comparison to other insulation boards. Walls with a bigger thickness of exterior insulation perform better when no vapor barrier is used. The PIR exterior insulation supports the moisture control strategy well in colder climates in perfect wall scenarios, where there is no air leakage and moisture intrusion. In cases where there is trapped moisture, the sheathing board has a higher moisture content with PIR boards with both aluminum or fiberglass type facers. An innovative facer material development for PIR boards can help efforts targeting improved energy-efficient and durable wall systems.
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Pavlík Z, Pokorný J, Pavlíková M, Zemanová L, Záleská M, Vyšvařil M, Žižlavský T. Mortars with Crushed Lava Granulate for Repair of Damp Historical Buildings. Materials (Basel) 2019; 12:E3557. [PMID: 31671520 DOI: 10.3390/ma12213557] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/25/2019] [Accepted: 10/28/2019] [Indexed: 11/17/2022]
Abstract
In this paper, crushed lava granulate was used as full silica sand replacement in composition of repair mortars based on hydrated lime, natural hydraulic lime, or cement-lime binder. Lava granules were analyzed by X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Particle size distribution of both silica and lava aggregates was assessed using standard sieve analysis. Hygrothermal function of the developed lightweight materials was characterized by the measurement of complete set of hygric, thermal, and structural parameters of the hardened mortar samples that were tested for both 28 days and 90 days cured specimens. As the repair mortars must also meet requirements on mechanical performance, their compressive strength, flexural strength, and dynamic Young’s modulus were tested. The newly developed mortars composed of lava aggregate and hydrated lime or natural hydraulic lime met technical, functional, compatibility, and performance criteria on masonry and rendering materials, and were found well applicable for repair of historically valuable buildings.
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Karaky H, Maalouf C, Bliard C, Moussa T, El Wakil N, Lachi M, Polidori G. Hygrothermal and Acoustical Performance of Starch-Beet Pulp Composites for Building Thermal Insulation. Materials (Basel) 2018; 11:E1622. [PMID: 30189650 PMCID: PMC6164752 DOI: 10.3390/ma11091622] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/11/2018] [Accepted: 08/14/2018] [Indexed: 11/16/2022]
Abstract
This article deals with the elaboration and the characterization of an innovative 100% plant-based green composite made solely of beet pulp (BP) and potato starch (S). Using this type of material in insulation applications seems a good solution to reduce the CO₂ gas emissions in building. The influence of the starch amount on composite characteristics was studied. Four mixtures were considered with different S/BP mass ratios (0.1, 0.2, 0.3 and 0.4). The physical properties of these materials were studied in terms of porosity, apparent and absolute densities, thermal conductivity, and hygric properties. The influence of humidity content on acoustical properties was studied as a function of frequency. Test results show a real impact of both starch and humidity contents on the hygrothermal and acoustical properties of the studied material due to the porosity. The composite with the lowest amount of starch (S/BP = 0.1) seems to be the optimal composition in terms of the hygrothermal and acoustical behaviors.
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Affiliation(s)
- Hamzé Karaky
- Groupe de Recherche en Sciences de l'Ingénieur GRESPI, SFR Condorcet FR CNRS 3417, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
- Institut de Chimie Moléculaire de Reims, ICMR-UMR 7312 CNRS, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
| | - Chadi Maalouf
- Groupe de Recherche en Sciences de l'Ingénieur GRESPI, SFR Condorcet FR CNRS 3417, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
| | - Christophe Bliard
- Institut de Chimie Moléculaire de Reims, ICMR-UMR 7312 CNRS, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
| | - Tala Moussa
- Groupe de Recherche en Sciences de l'Ingénieur GRESPI, SFR Condorcet FR CNRS 3417, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
| | - Nadim El Wakil
- Groupe de Recherche en Sciences de l'Ingénieur GRESPI, SFR Condorcet FR CNRS 3417, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
| | - Mohammed Lachi
- Groupe de Recherche en Sciences de l'Ingénieur GRESPI, SFR Condorcet FR CNRS 3417, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
| | - Guillaume Polidori
- Groupe de Recherche en Sciences de l'Ingénieur GRESPI, SFR Condorcet FR CNRS 3417, Université de Reims Champagne Ardennes, Moulin de la Housse, 51687 Reims, France.
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