Effect of hydrophobisation on durability related properties of ceramic brick

Barnat-Hunek, Danuta; Smarzewski, Piotr; Suchorab, Zbigniew

doi:10.1016/j.conbuildmat.2016.02.078

Cited by 27 publications

(29 citation statements)

References 26 publications

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“…Materials with no hydrophobic coating and those hydrophobised with the non-modified polymer were characterised by a steady absorbability increase at prolonged impregnation, which was confirmed in other studies reported by Barnat-Hunek [31,32]. There was a clear effect of the silica addition on the absorbability decline in the initial fatigue cycles.…”

Section: Discussionsupporting

confidence: 82%

Processes of Fatigue Destruction in Nanopolymer-Hydrophobised Ceramic Bricks

et al. 2017

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Abstract:The article presents a proposal of a model of fatigue destruction of hydrophobised ceramic brick, i.e., a basic masonry material. The brick surface was hydrophobised with two inorganic polymers: a nanopolymer preparation based on dialkyl siloxanes (series 1-5) and an aqueous silicon solution (series 6-10). Nanosilica was added to the polymers to enhance the stability of the film formed on the brick surface. To achieve an appropriate blend of the polymer liquid phase and the nano silica solid phase, the mixture was disintegrated by sonication. The effect of the addition of nano silica and sonication on changes in the rheological parameters, i.e., viscosity and surface tension, was determined. Material fatigue was induced by cyclic immersion of the samples in water and drying at a temperature of 100 • C, which caused rapid and relatively dynamic movement of water. The moisture and temperature effect was determined by measurement of changes in surface hardness performed with the Vickers method and assessment of sample absorbability. The results provided an approximate picture of fatigue destruction of brick and hydrophobic coatings in relation to changes in their temporal stability. Additionally, SEM images of hydrophobic coatings in are shown.

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Section: Discussionsupporting

confidence: 82%

Processes of Fatigue Destruction in Nanopolymer-Hydrophobised Ceramic Bricks

et al. 2017

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“…However, several approaches to utilize its potential for evaluating the moisture of construction materials have been noted in the scientific literature. Most of the investigations on building materials are conducted using the traditional, invasive probes used for soils [28][29][30][31][32]. Several attempts have been also made to evaluate the moisture of building materials by the co-authors of this article [33,34]…”

Section: Introductionmentioning

confidence: 99%

Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites

Brzyski

Suchorab

2020

Materials

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The use of waste plants in the production of building materials is consistent with the principles of sustainable development. One of the ideas involves using hemp shives as an aggregate for the production of a composite used as a filling of the timber frame construction of the walls. The most important disadvantage of using the building materials based on organic components is their susceptibility to the water influence. The wall material is exposed to rising groundwater. The research part of the paper presented the preparation method and the investigation of the hemp-perlite-lime composites. Flexural and compressive strength, apparent density, total porosity, thermal conductivity, and mass absorptivity were examined. The main research part pertained to the analysis of capillary uptake occurrence in the composites, being the important phenomenon present in the external walls. The study on this phenomenon was carried out using the technique of indirect moisture evaluation—Time Domain Reflectometry (TDR). The indirect readouts were additionally verified with the traditional evaluation using the gravimetric method based on the PN-EN 1925 standard. The study proved that the tested composites were characterized by low apparent density, thermal conductivity, strength parameters, high total porosity, and mass absorptivity. The partial replacement of hemp shives by expanded perlite had a beneficial effect on the tested properties of composites.

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“…The permeability of chloride ions after application of different silane agents decreased by 20-50% compared to reference samples without hydrophobisation. The positive effect of surface hydrophobisation with silanes was confirmed by the studies of Barnat-Hunek et al [70]. After 25 F-T cycles, a clear improvement in frost resistance was observed in concrete with perlite aggregate.…”

Section: Durability/ Physical Propertiesmentioning

confidence: 58%

Surface Modification of Lightweight Mortars by Nanopolymers to Improve Their Water-Repellency and Durability

et al. 2020

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The paper explores the possibility of covering the mortar with the lightweight aggregate by the nanopolymer silane and siloxane as surface hydrophobisation. The investigation involved the mortars with two types of hydrophobic agents diluted with water in a ratio of 1:4 and 1:8. Mortar wetting properties were determined by measuring the absorbability, water vapor diffusion, contact angle (CA) and surface free energy (SFE) of their structure. Surface micro-roughness and 2D topography were evaluated. Scanning electron microscopy (SEM) has shown the microstructure and distribution of pores in mortars. The reduction in absorbency after the first day of testing by 87% was shown. An improvement in frost resistance after 25 cycles by 97% and an 18-fold decrease in weight loss after the sulphate crystallization test were observed. The hydrophobic coating reduces the SFE of mortars and increases the CA. In the case of using silanes, a 9-fold increase CA was observed.

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Effect of hydrophobisation on durability related properties of ceramic brick

Cited by 27 publications

References 26 publications

Processes of Fatigue Destruction in Nanopolymer-Hydrophobised Ceramic Bricks

Processes of Fatigue Destruction in Nanopolymer-Hydrophobised Ceramic Bricks

Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites

Surface Modification of Lightweight Mortars by Nanopolymers to Improve Their Water-Repellency and Durability

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