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The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars
Ca’ Foscari University of Venice, Italy.
Ca’ Foscari University of Venice, Italy.
RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB, Betong & Berg.ORCID iD: 0000-0003-1904-7426
BAM Federal Institute for Materials Research and Testing, Germany.
2015 (English)In: Cement & Concrete Composites, ISSN 0958-9465, E-ISSN 1873-393X, Vol. 59, p. 107-118Article in journal (Refereed) Published
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Abstract [en]

Abstract Water-repellent mortars were prepared using different hydrophobic compounds as admixtures. Calcium and zinc stearates, silane/siloxane products (as liquid solution and powder) were mixed into limestone cement mortars for obtaining in-bulk water-repellent mortars suitable for building protection and resistant to the degrading action of water. The influences of the admixtures on the hydration and structure of the designed mortars were investigated by SEM, TG–DSC, FT-IR, XRD, and isothermal calorimetry. The effectiveness of these agents against water action was evaluated by using techniques and methods such as mercury intrusion porosimetry, water absorption tests and contact angle measurements. Siloxane products conveyed good water-repellent effectiveness, without strongly influencing the setting and hydration of the binder, while the zinc stearates slowed down the hydration reactions.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 59, p. 107-118
Keywords [en]
water repellent admixtures, Portland limestone cement mortars, hydration products, pore size distribution, siloxanes, stearates
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:ri:diva-360DOI: 10.1016/j.cemconcomp.2015.02.004OAI: oai:DiVA.org:ri-360DiVA, id: diva2:939528
Available from: 2016-06-20 Created: 2016-06-20 Last updated: 2019-07-09Bibliographically approved

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Mueller, Urs

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