{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T07:44:34Z","timestamp":1781682274893,"version":"3.54.5"},"reference-count":34,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2019,6,14]],"date-time":"2019-06-14T00:00:00Z","timestamp":1560470400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Applied Sciences"],"abstract":"<jats:p>Building retrofitting plays a key-role in energy saving and a growing interest is focused on insulating materials that allow a reduction in heat loss from envelopes with low thickness, by a process of reducing heating and cooling demand. In this context, a complete characterization of the physical properties of Moroccan natural gypsum materials was carried out. Basic information on the mineralogical, microstructure, thermal, mechanical, and acoustic characteristics of the rocks sampled from two Moroccan regions is provided. It was found that mineralogy, porosity, and water content are the main factors governing the development of the structure and the strength of the samples. The measured values of the porosity were 8.94%, the water content varied between 2.5\u20133.0% for the two studied typologies, coming from Agadir and Safi, respectively. Gypsum powder was used for fabricating samples, which were investigated in terms of thermal and acoustic performance. Thermal properties were measured by means of a hot disk apparatus and values of conductivity of 0.18 W\/mK and 0.13 W\/mK were obtained for Agadir and Safi Gypsum, respectively. The acoustic performance was evaluated in terms of absorption coefficient and sound insulation, measured by means of a Kundt\u2019s Tube (ISO 10534-2). The absorption coefficients were slightly higher than the ones of conventional plasters with similar thickness. A good sound insulation performance was confirmed, especially for Safi Gypsum, with a transmission loss-value up to about 50 dB at high frequency.<\/jats:p>","DOI":"10.3390\/app9122443","type":"journal-article","created":{"date-parts":[[2019,6,14]],"date-time":"2019-06-14T11:19:58Z","timestamp":1560511198000},"page":"2443","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":63,"title":["Characterization of Natural Gypsum Materials and Their Composites for Building Applications"],"prefix":"10.3390","volume":"9","author":[{"given":"Said","family":"Bouzit","sequence":"first","affiliation":[{"name":"Faculty of Science, Ibn Zohr University, Agadir 80000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Said","family":"Laasri","sequence":"additional","affiliation":[{"name":"ENSA-El Jadida, Chouaib Doukkali University, El Jadida 1104, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohamed","family":"Taha","sequence":"additional","affiliation":[{"name":"Faculty of Science, Ibn Zohr University, Agadir 80000, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdelaziz","family":"Laghzizil","sequence":"additional","affiliation":[{"name":"Faculty of Sciences, Mohammed V University, Rabat 10010, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdelowahed","family":"Hajjaji","sequence":"additional","affiliation":[{"name":"ENSA-El Jadida, Chouaib Doukkali University, El Jadida 1104, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesca","family":"Merli","sequence":"additional","affiliation":[{"name":"Department of Engineering, University of Perugia, 06125 Perugia, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5653-3701","authenticated-orcid":false,"given":"Cinzia","family":"Buratti","sequence":"additional","affiliation":[{"name":"Department of Engineering, University of Perugia, 06125 Perugia, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,6,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1501","DOI":"10.1007\/BF01983709","article-title":"Thermogravimetric studies of the synthesis of cas from gypsum, CaSO4\u00b72H2O and phosphogypsum","volume":"49","author":"Strydom","year":"1997","journal-title":"J. Therm. Anal."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1016\/j.jafrearsci.2016.05.023","article-title":"Tunisian Gypsums: Characteristics and use in cement","volume":"121","author":"Mahmoudi","year":"2016","journal-title":"J. Afr. Earth Sci."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Roszczynialski, W., Gawlicki, M., and Nocu\u0144 Wczelik, W. (1996). Production and Use of By-Product Gypsum in the Construction Industry. Waste Materials Used in Concrete Manufacturing, William Andrew.","DOI":"10.1016\/B978-081551393-3.50005-3"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1016\/S0167-9031(87)90543-3","article-title":"Rock characterization of gypsum and marl","volume":"6","author":"Singh","year":"1987","journal-title":"Int. J. Min. Sci. Technol."},{"key":"ref_5","first-page":"340","article-title":"Mineral deposition systems at rock art sites, Kimberley, Northern Australia Field observations","volume":"14","author":"Green","year":"2017","journal-title":"J. Archaeol. Sci. Rep."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"680","DOI":"10.1016\/j.egypro.2013.11.070","article-title":"Thermal characterization of a Tunisian gypsum plaster as construction material","volume":"42","author":"Soukaina","year":"2013","journal-title":"Energy Procedia"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1007\/s13146-015-0287-9","article-title":"Properties of Mestaoua evaporites (southern Tunisia) for plaster industry","volume":"32","author":"Sdiri","year":"2017","journal-title":"Carbonates Evaporites"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1016\/j.enconman.2014.07.027","article-title":"Polymeric-SiO2-PCMs for improving the thermal properties of gypsum applied in energy efficient buildings","volume":"87","author":"Borreguero","year":"2014","journal-title":"Energy Convers. Manag."},{"key":"ref_9","unstructured":"EN 13279-2 (2014). Gypsum Binders and Gypsum Plasters-Part. 2: Test. Methods, BSI."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/j.tsep.2017.02.008","article-title":"Thermal and mechanical properties of gypsum plaster mixed with expanded polystyrene and tragacanth","volume":"1","author":"Bicer","year":"2017","journal-title":"Therm. Sci. Engin. Progr."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"5839","DOI":"10.3390\/su6095839","article-title":"Development of Innovative Aerogel Based Plasters: Preliminary Thermal and Acoustic Performance Evaluation","volume":"6","author":"Buratti","year":"2014","journal-title":"Sustainability"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"498","DOI":"10.1016\/j.clay.2016.07.021","article-title":"Moisture absorption, thermal conductivity and noise mitigation of clay based plasters: The influence of mineralogical and textural characteristics","volume":"132\u2013133","author":"Randazzo","year":"2016","journal-title":"Appl. Clay Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"691","DOI":"10.1016\/j.conbuildmat.2018.09.073","article-title":"The laboratory analyses for the plasters prepared with river sand aggregate and hydraulic lime binder","volume":"190","author":"Bozkurt","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"462","DOI":"10.1016\/j.conbuildmat.2017.11.064","article-title":"Acoustical properties of hemp concretes for building thermal insulation: Application to clay and lime binders","volume":"160","year":"2018","journal-title":"Constr. Build. Mater."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1088\/0022-3727\/18\/1\/003","article-title":"Simultaneous measurement of thermal conductivity and thermal diffusivity of some building materials using the transient hot strip method","volume":"18","author":"Singh","year":"1985","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1002\/fam.810190107","article-title":"Transient plane source (TPS) technique for measuring thermal transport properties of building materials","volume":"19","author":"Log","year":"1995","journal-title":"Fire Mater."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3856","DOI":"10.1063\/1.1145178","article-title":"Thermal conductivity, thermal diffusivity, and specific heat of thin samples from transient measurement with the hot disk sensor","volume":"65","author":"Gustavsson","year":"1994","journal-title":"Rev. Sci. Instrum."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1016\/j.tca.2005.06.026","article-title":"Rapid thermal conductivity measurement with a hot disk sensor\u2013Part 1. Theoretical considerations","volume":"436","author":"He","year":"2005","journal-title":"Thermochim. Acta"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"871","DOI":"10.1016\/j.ijrmms.2004.01.012","article-title":"Correlating sound velocity with the density, compressive strength and Young\u2019s modulus of carbonate rocks","volume":"41","author":"Yasar","year":"2004","journal-title":"Int. J. Rock Mech. Min. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"2531","DOI":"10.1016\/j.jeurceramsoc.2017.02.014","article-title":"Comparison of conventional Knoop and Vickers hardness of ceramic materials","volume":"37","author":"Tricoteaux","year":"2017","journal-title":"J. Eur. Ceram. Soc."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"565","DOI":"10.4236\/ijg.2012.33057","article-title":"Characterization and Classification of Rocks with Lamb Modes","volume":"3","author":"Faiz","year":"2012","journal-title":"Int. J. Geosci."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Baino, F., and Vern\u00e9, E. (2017). Production and Characterization of Glass-Ceramic Materials for Potential Use in Dental Applications: Thermal and Mechanical Properties, Microstructure, and In Vitro Bioactivity. Appl. Sci., 7.","DOI":"10.3390\/app7121330"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"715","DOI":"10.1016\/j.crme.2012.09.005","article-title":"Manufacturing and mechanical properties of calcium phosphate biomaterials","volume":"340","author":"Laasri","year":"2012","journal-title":"Comptes Rendus Mec."},{"key":"ref_24","unstructured":"ISO 10534-2 (1998). Acoustics-Determination of Sound Absorption Coefficient and Impedance in Impedance Tubes-Part. 2: Transfer-Function Method, ISO."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"596","DOI":"10.3938\/jkps.53.596","article-title":"Measurement of sound transmission loss by using impedance tubes","volume":"53","author":"Jung","year":"2008","journal-title":"J. Korean Phys. Soc."},{"key":"ref_26","unstructured":"Long, M. (2014). Sound Transmission Loss, Architectural Acoustics, Elsevier. [2nd ed.]."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1006\/jssc.1995.1260","article-title":"Investigation of the crystal structure of gamma-CaSO4, CaSO4 \u00bd H2O and CaSO4 0.6H2O by powder diffraction methods","volume":"117","author":"Bezou","year":"1995","journal-title":"J. Solid State Chem."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1530","DOI":"10.2138\/am.2008.2917","article-title":"High-pressure behavior of gypsum: A single-crystal X-ray study","volume":"93","author":"Comodi","year":"2008","journal-title":"Am. Miner."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1016\/j.pcrysgrow.2007.01.002","article-title":"Calcium sulphate hemihydrate hydration leading to gypsum crystallization","volume":"53","author":"Singh","year":"2007","journal-title":"Progr. Crys. Growth Charact. Mater."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"505","DOI":"10.1016\/j.conbuildmat.2004.04.003","article-title":"The effect of water movement on specific heat of gypsum plaster board in heat transfer analysis under natural fire exposure","volume":"18","author":"Ang","year":"2004","journal-title":"Constr. Build. Mater."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1002\/fam.786","article-title":"Thermal properties of gypsum plaster board at high temperatures","volume":"26","author":"Thomas","year":"2002","journal-title":"Fire Mater."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"283","DOI":"10.15255\/KUI.2016.006","article-title":"Preparation of thermal insulation plaster with FGD gypsum","volume":"65","author":"Zhank","year":"2016","journal-title":"Kem. Ind."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"449","DOI":"10.1016\/S0008-8846(96)85032-0","article-title":"Relationship between mechanical properties and porosity of water-resistant gypsum binder","volume":"26","author":"Singh","year":"1996","journal-title":"Cem. Concr. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.apacoust.2018.08.008","article-title":"Acoustic measurements on monolithic aerogel samples and application of the selected solutions to standard window systems","volume":"142","author":"Merli","year":"2018","journal-title":"Appl. Acoust."}],"container-title":["Applied Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2076-3417\/9\/12\/2443\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:58:36Z","timestamp":1760187516000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2076-3417\/9\/12\/2443"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,6,14]]},"references-count":34,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2019,6]]}},"alternative-id":["app9122443"],"URL":"https:\/\/doi.org\/10.3390\/app9122443","relation":{},"ISSN":["2076-3417"],"issn-type":[{"value":"2076-3417","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,6,14]]}}}