Non-hydrophobized perlite renders for repair and thermal insulation purposes: Influence of different binders on their properties and durability

Vyšvařil, Martin; Pavlíková, Milena; Záleská, Martina; Pivák, Adam; Žižlavský, Tomáš; Rovnanı́ková, Pavla; Bayer, Patrik; Pavlík, Zbyšek

doi:10.1016/j.conbuildmat.2020.120617

Cited by 40 publications

(20 citation statements)

References 42 publications

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“…The assessed hygric parameters thus well corresponded with the macrostructural properties and pore size distribution data. Quantitatively, the water absorption coefficient was low as typical capillary active materials have A w value of about two orders of magnitude higher [ 68 , 69 ]. For example, the standard EN 998 [ 70 ] introduces three classes of rendering mortars waterproofing.…”

Section: Resultsmentioning

confidence: 99%

The Impact of Graphene and Diatomite Admixtures on the Performance and Properties of High-Performance Magnesium Oxychloride Cement Composites

et al. 2020

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A high-performance magnesium oxychloride cement (MOC) composite composed of silica sand, diatomite powder, and doped with graphene nanoplatelets was prepared and characterized. Diatomite was used as a 10 vol.% replacement for silica sand. The dosage of graphene was 0.5 wt.% of the sum of the MgO and MgCl2·6H2O masses. The broad product characterization included high-resolution transmission electron microscopy, X-ray diffraction, X-ray fluorescence, scanning electron microscopy and energy dispersive spectroscopy analyses. The macrostructural parameters, pore size distribution, mechanical resistance, stiffness, hygric and thermal parameters of the composites matured for 28-days were also the subject of investigation. The combination of diatomite and graphene nanoplatelets greatly reduced the porosity and average pore size in comparison with the reference material composed of MOC and silica sand. In the developed composites, well stable and mechanically resistant phase 5 was the only precipitated compound. Therefore, the developed composite shows high compactness, strength, and low water imbibition which ensure high application potential of this novel type of material in the construction industry.

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Section: Resultsmentioning

confidence: 99%

The Impact of Graphene and Diatomite Admixtures on the Performance and Properties of High-Performance Magnesium Oxychloride Cement Composites

et al. 2020

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“…For restoration purposes, the use of lime-, natural hydraulic lime-, cement-lime-, and pozzolanic-lime-based mortars, e.g., lime-metakaolin-based mortars, has been considered, with the majority considering the use of lime-based mortars [23][24][25][26][27][28][29][30][31][32][33]. In any case, in construction practice, despite compatibility problems, lime-cement repair mortars are the most commonly used in commercial materials for the repair and rendering of masonry structures.…”

Section: Introductionmentioning

confidence: 99%

“…Such structures are necessary to accommodate salt crystallization products and to avoid the deterioration of render caused by them and by freeze-thaw cycles. Due this fact, the use of, e.g., crushed lava [34] pumice [35], activated carbon [10], silica gel [10], ceramic waste [36,37], and perlite [30] in renovating renders has been suggested. These renders have been recognized as suitable due to their ability to accumulate considerable amounts of salts within their porous system [38].…”

Section: Introductionmentioning

confidence: 99%

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Zeolite Lightweight Repair Renders: Effect of Binder Type on Properties and Salt Crystallization Resistance

et al. 2021

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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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“…Therefore, the compromise solution in the improvement of the hygrothermal performance of such buildings is to enhance their envelopes with appropriate thermal insulation plasters possessing other advanced functional parameters [ 8 ]. Many investigations were carried out focused on the integration of different kinds of insulating materials into the composition of plasters in order to achieve their low thermal conductivity and thus thermal insulation efficiency [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Generally, the authors reported that the addition of lightweight aggregates or fibers into plaster composition greatly improves thermal conductivity, increases porosity, and decreases the mechanical parameters of the hardened plasters.…”

Section: Introductionmentioning

confidence: 99%

Lightweight Vapor-Permeable Plasters for Building Repair Detailed Experimental Analysis of the Functional Properties

et al. 2021

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Three types of lightweight plasters for building repair were prepared and tested. The composition of plasters was designed in respect to their compatibility with materials used in the past in historical masonry. For the hardened plasters, detailed testing of microstructural and macrostructural parameters was realized together with the broad experimental campaign focused on the assessment of mechanical, hygric, and thermal properties. As the researched plasters should find use in salt-laden masonry, specific attention was paid to the testing of their durability against salt crystallization. The mechanical resistance, porosity, water vapor transmission properties, and water transport parameters of all the researched plasters safely met criteria of WTA directive 2-9-04/D and standard EN 998-1 imposed on repair mortars. Moreover, the tested materials were ranked as lightweight plasters and due to their low thermal conductivity they can be used for the improvement of thermal performance of repaired masonry. The salt crystallization test caused little or no damage of the plasters, which was due to their high porosity that provided free space for salt crystallization. The developed plasters can be recommended for application in repair of damp and salt masonry and due to their compatible composition also in historical, culture heritage buildings. The added value of plasters is also their good thermal insulation performance.

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Non-hydrophobized perlite renders for repair and thermal insulation purposes: Influence of different binders on their properties and durability

Cited by 40 publications

References 42 publications

The Impact of Graphene and Diatomite Admixtures on the Performance and Properties of High-Performance Magnesium Oxychloride Cement Composites

The Impact of Graphene and Diatomite Admixtures on the Performance and Properties of High-Performance Magnesium Oxychloride Cement Composites

Zeolite Lightweight Repair Renders: Effect of Binder Type on Properties and Salt Crystallization Resistance

Lightweight Vapor-Permeable Plasters for Building Repair Detailed Experimental Analysis of the Functional Properties

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