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Their ability to improve the durability of concrete samples containing recycled aggregates was assessed. To determine this protective capacity, 180 samples were analyzed using different tests, such as water penetration under pressure, capillary absorption, freeze\u2013thaw and water droplet absorption test. Three types of conditions were used: outdoor\u2013indoor exposure, re-application of biopolymers and application in vertical exposure conditions. The results showed reductions of up to 50% in the water penetration test and a delay in the water droplet absorption test of up to 150 times relative to the reference. The surface application of these bioproducts significantly reduced the degree of water penetration in recycled concrete, increasing its useful lifespan and proving to be a promising treatment for protecting concrete surfaces.<\/jats:p>","DOI":"10.3390\/ma15031181","type":"journal-article","created":{"date-parts":[[2022,2,4]],"date-time":"2022-02-04T11:35:17Z","timestamp":1643974517000},"page":"1181","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Biotreatments Using Microbial Mixed Cultures with Crude Glycerol and Waste Pinewood as Carbon Sources: Influence of Application on the Durability of Recycled Concrete"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8547-7817","authenticated-orcid":false,"given":"Lorena","family":"Serrano-Gonz\u00e1lez","sequence":"first","affiliation":[{"name":"Department of Engineering and Agricultural Sciences, School of Agricultural and Forest Engineering, University of Le\u00f3n, Av. De Portugal 41, 24071 Leon, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0149-2775","authenticated-orcid":false,"given":"Daniel","family":"Merino-Maldonado","sequence":"additional","affiliation":[{"name":"Department of Engineering and Agricultural Sciences, School of Agricultural and Forest Engineering, University of Le\u00f3n, Av. De Portugal 41, 24071 Leon, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9048-7021","authenticated-orcid":false,"given":"Andrea","family":"Antol\u00edn-Rodr\u00edguez","sequence":"additional","affiliation":[{"name":"Department of Engineering and Agricultural Sciences, School of Agricultural and Forest Engineering, University of Le\u00f3n, Av. De Portugal 41, 24071 Leon, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6094-0107","authenticated-orcid":false,"given":"Paulo C.","family":"Lemos","sequence":"additional","affiliation":[{"name":"Associated Laboratory for Green Chemistry-Chemistry and Technology Network (LAQV-REQUIMTE), Department of Chemistry, NOVA School of Science and Technology (FCT NOVA), NOVA University of Lisbon, 2829-516 Caparica, Portugal"}]},{"given":"Alice S.","family":"Pereira","sequence":"additional","affiliation":[{"name":"Applied Molecular Biosciences Unit (UCIBIO), Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal"},{"name":"Associate Laboratory i4HB\u2014Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0372-949X","authenticated-orcid":false,"given":"Paulina","family":"Faria","sequence":"additional","affiliation":[{"name":"Civil Engineering Research and Innovation for Sustainability (CERIS), Department of Civil Engineering, NOVA School of Science and Technology (FCT NOVA), NOVA University of Lisbon, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0902-6429","authenticated-orcid":false,"given":"Andr\u00e9s","family":"Juan-Vald\u00e9s","sequence":"additional","affiliation":[{"name":"Department of Engineering and Agricultural Sciences, School of Agricultural and Forest Engineering, University of Le\u00f3n, Av. De Portugal 41, 24071 Leon, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8972-1861","authenticated-orcid":false,"given":"Julia","family":"Garc\u00eda-Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Department of Engineering and Agricultural Sciences, School of Agricultural and Forest Engineering, University of Le\u00f3n, Av. De Portugal 41, 24071 Leon, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8768-5898","authenticated-orcid":false,"given":"Julia M\u00aa","family":"Mor\u00e1n-del Pozo","sequence":"additional","affiliation":[{"name":"Department of Engineering and Agricultural Sciences, School of Agricultural and Forest Engineering, University of Le\u00f3n, Av. 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