Mechanical properties of masonry repair dolomitic lime-based mortars

Lanas, J.; Bernal, Juan Luis Pérez; Bello, Miguel Ángel Jiménez; Álvarez, J.I.

doi:10.1016/j.cemconres.2005.10.004

Cited by 74 publications

(48 citation statements)

References 25 publications

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“…As it has been reported (Lanas et al 2006;Pavia and Toomey 2008) there is a close relation between the pore structure, the mechanical properties and the water absorption of mortars. By adding aggregate these properties can be modified.…”

Section: Discussionmentioning

confidence: 90%

Porosity and compatibility of repair mortars and Hungarian porous limestones

Szemerey-Kiss

Török

2012

Central European Geology

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Porosity and water absorption of different binder/aggregate ratios of repair mortar and porous limestone were studied that were used in many Hungarian monuments. Different types of mortars were analyzed by using mercury intrusion porosimetry (MIP) and the water saturation method (WSM). Test results showed that there was a strong correlation between the absorption mechanism and the porosimetric characteristics. Mechanical properties of the tested mortars were observed earlier. Pore size distribution confirms that the total porosity increases with increasing aggregate content. Natural stones mainly have medium and large pore radii (1-100 μm) while repair mortars, even with increased aggregate ratio, have smaller pore radii (0.01-0.1 μm). The comparison of different data allows us to state that pore characteristics such as pore volume, pore geometry, pore size distribution and network connectivity are the key control factors of stone and mortar deterioration.

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Section: Discussionmentioning

confidence: 90%

Porosity and compatibility of repair mortars and Hungarian porous limestones

Szemerey-Kiss

Török

2012

Central European Geology

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“…The aggregate was supplied by Caleras de Liskar (grupo HORPASA). This aggregate was a calcareous one employed in previous research works conducted on lime-based mortars [2,29,49]. Figures 1 and 2 present the mineralogical composition of the lime and aggregate used (obtained by X-ray diffraction) and their granulometric distributions, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The selected binder: aggregate ratio (B:Ag) was 1:1, by volume. This decision was taken according to previous data [2,29]. Volume proportions were converted in weight in order to avoid any imprecise measurement (Table 1).…”

Section: Methodsmentioning

confidence: 99%

Effect of water-repellent admixtures on the behaviour of aerial lime-based mortars

Izaguirre

Lanas²,

Álvarez

2009

Cement and Concrete Research

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120

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Two different anionic surfactants, sodium oleate and calcium stearate, commercialized as water repellents for cement-based mortars, were added to lime-based mortars in order to check whether they were improved by these admixtures. Different properties of limebased mortars were evaluated: fresh state behaviour through water retention, air content and setting time, hardened state properties such as density, water absorption through capillarity, water vapour permeability, long-term compressive strengths, pore structure through mercury intrusion porosimetry, and durability assessed by means of freezingthawing cycles. A clear improvement in lime-based mortars was achieved when sodium oleate was added: strong capillarity reduction and excellent durability in the face of freezing-thawing processes, without any compressive strength drop. The mechanism for this improvement was related to air void formation due to the air entraining ability of these surfactants. Insolubility of calcium stearate turned out to be responsible for fewer air bubbles -as SEM examination revealed -and showed lower effectiveness.3

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“…The selected binder: aggregate ratio (B:Ag) was 1:1, by volume. This decision was taken according to previous data that showed the best mechanical strengths and durability performance in aerial and hydraulic lime mortars for this volumetric proportion [5,26,27]. Volume proportions were converted into weight in order to avoid any imprecise measurement.…”

Section: Methodsmentioning

confidence: 99%

Effect of a polypropylene fibre on the behaviour of aerial lime-based mortars

Izaguirre

Lanas²,

Álvarez

2011

Construction and Building Materials

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A polypropylene fibre was added to lime-based mortars in order to check whether they were improved by this admixture. Different properties of lime-based mortars were evaluated: fresh state behaviour through water retention, air content and setting time;hardened state properties such as density, shrinkage, water absorption through capillarity, water vapour permeability, long-term flexural and compressive strengths, pore structure through mercury intrusion porosimetry, and durability assessed by means of freezing-thawing cycles. An improvement in some properties of aerial lime-based mortars -such as permeability, mechanical strengths, reduction in macroscopic cracks or durability in the face of freezing-thawing cycles -was achieved when fibre was added at a low dosage. When a larger amount of additive was used, only the reduction in cracks and the durability of the material were improved.

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Mechanical properties of masonry repair dolomitic lime-based mortars

Cited by 74 publications

References 25 publications

Porosity and compatibility of repair mortars and Hungarian porous limestones

Porosity and compatibility of repair mortars and Hungarian porous limestones

Effect of water-repellent admixtures on the behaviour of aerial lime-based mortars

Effect of a polypropylene fibre on the behaviour of aerial lime-based mortars

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