A comparative study of the durability and behaviour of fat lime and feebly-hydraulic lime mortars

Pavía, Sara; Treacy, E.

doi:10.1617/s11527-005-9033-4

Cited by 38 publications

(12 citation statements)

References 1 publication

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“…), which complicates the classification of degradation processes [17,18]. The combined action of temperature and water is one of the most common degradation mechanisms in renders, contributing to cracking due to temperature variation and easier water absorption [19]. Water promotes the action of relevant agents, such as freeze-thaw, salts crystallisation and various biological agents.…”

Section: Degradation Mechanismsmentioning

confidence: 99%

Assessment of test methods for the durability of thermal mortars exposure to freezing

2019

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Thermal mortars are a trend in the construction industry in recent years, owing to the required decrease of the thermal transmission of building envelopes. The high porosity of thermal mortars leads to permeability values that can affect their durability since it creates more favourable conditions for the penetration of aggressive agents. Water is observed as one of the most common and harmful degradation agents. Regarding the climatic variability in Europe, freezing is a usual degradation mechanism both in severe and moderate climates. Since thermal mortars have higher water absorption than a common insulation, the freezing may occur. As no durability assessment methodologies to evaluate the exposure of thermal mortars to freezing degradation mechanisms exist, the present work has the objective to analyse existing accelerated ageing procedures, which envisage freezing degradation mechanism. As such, the durability assessment described in EN 1015-21 and ETAG 004 was adapted and implemented in different thermal mortars. It was observed that the higher number of cycles and the severity of the freeze-thaw ageing cycles, according to ETAG 004, may reproduce the effect of the northern European climates, while the ageing cycles, described in EN 1015-21, combine

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Section: Degradation Mechanismsmentioning

confidence: 99%

Assessment of test methods for the durability of thermal mortars exposure to freezing

2019

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“…Hydrated calcic lime (EN 459-1 standard) has been chosen instead of hydraulic lime for its ability to generate only pozzolanic and carbonation reactions. Furthermore, some authors report a better durability of hydrated lime mortars [38].…”

Section: Mineral Resourcesmentioning

confidence: 99%

Design of green concrete made of plant-derived aggregates and a pumice–lime binder

Nozahic

Amziane

Torrent

et al. 2012

Cement and Concrete Composites

144

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“…The mechanical performance of masonry incorporating fired-clay bricks and mortars with relatively low elastic moduli have however been limited (e.g. limecement mortars [16] or lime-only mortars [18,[33][34][35], with most available studies focusing on masonry incorporating cement mortars [7,8,23,32]. The latter are not appropriate for the conservation of heritage masonry, as such repointing mortar produces problems such as brick spalling [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Compressive behaviour of fired-clay brick and lime mortar masonry components in dry and wet conditions

Bompa

Elghazouli

2020

Mater Struct

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This paper examines the fundamental mechanical properties of masonry elements incorporating fired-clay bricks and hydraulic lime mortars under ambient-dry and wet conditions, corresponding to 48 h submersion in water. In addition to complementary material characterisation assessments, two types of specimens are tested: cylindrical cores in compression, and wall elements in compression. Overall, a detailed account of more than 50 tests is given. Apart from conventional measurements, the use of digital image correlation techniques enables a detailed assessment of the influence of moisture on the constitutive response, confinement effects and mechanical properties of masonry components. The uniaxial compressive strengths of wet brick elements and brick-mortar components, resulting from tests on cylindrical cores with height-to-depth ratios of around two, are shown to be 13-18% lower than those in ambient-dry conditions. The tests also show that enhanced confinement levels in brick units mobilise 67-92% higher strengths than in the corresponding unconfined cylinders. Moreover, experimental observations indicate that the presence of significant confinement reduces the influence of moisture on the mechanical properties as a function of the brick and mortar joint thickness and their relative stiffness. As a result, the failure of wet masonry walls in compression is found to be only marginally lower than those in ambient-dry conditions. Based on the test results, the influence of moisture on the constitutive response and mechanical properties of masonry components is discussed, and considerations for practical application are highlighted.

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A comparative study of the durability and behaviour of fat lime and feebly-hydraulic lime mortars

Cited by 38 publications

References 1 publication

Assessment of test methods for the durability of thermal mortars exposure to freezing

Assessment of test methods for the durability of thermal mortars exposure to freezing

Design of green concrete made of plant-derived aggregates and a pumice–lime binder

Compressive behaviour of fired-clay brick and lime mortar masonry components in dry and wet conditions

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