Study of the water-retention capacity of a lime–sand mortar: Influence of the physicochemical characteristics of the lime

Sebaibi, Yahya; Dheilly, Rose-Marie; Quéneudec, M.

doi:10.1016/s0008-8846(02)01038-4

Cited by 36 publications

(11 citation statements)

References 2 publications

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“…As expected, by adding water to the mortar mixes, higher consistency of mortars was achieved, even if its variation differs for each mix. This result is in agreement with results pointed out in literature stating that mortar mixes with lime need more water to reach the same consistency of mortar mixes without lime, which is essentially related to the smaller particles size found in lime than in cement and thus to higher specific surface of lime (Sébaibi et al [27], Reddy and Gupta [10], Hendricks et al [28]). Thus, the increase of the amount of fine particles in lime leads to a higher water retention capacity, which is also a measure of the workability (Sébaibi et al [27]).…”

Section: Workability Of Mortars (Consistency Through Flow Table Test)supporting

confidence: 92%

Influence of aggregates grading and water/cement ratio in workability and hardened properties of mortars

Haach

Vasconcelos

Lourenço

2011

Construction and Building Materials

219

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Mortar is the material responsible for distribution of stresses in masonry structures. Knowledge about the fresh and hardened properties of mortar is fundamental to ensure a good performance of masonry walls. Water/cement ratio and aggregates grading are among several variables that influence physical and mechanical behaviour of mortars. An experimental program is presented in order to evaluate the influence of aggregates grading and water/cement ratio in workability and hardened properties of mortars. Eighteen compositions of mortar are prepared using three relations cement:lime:sand, two types of sand and three water/cement ratios. Specimens are analyzed through flow table test, compressive and flexural strength tests. Results indicate that the increase of water/cement ratio reduces the values of hardened properties and increases the workability. Besides, sands grading has no influence in compressive strength. On the other hand, significant differences in deformation capacity of mortars were verified with the variation of the type of sand. Finally, some correlations are presented among hardened properties and the compressive strength.

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Section: Workability Of Mortars (Consistency Through Flow Table Test)supporting

confidence: 92%

Influence of aggregates grading and water/cement ratio in workability and hardened properties of mortars

Haach

Vasconcelos

Lourenço

2011

Construction and Building Materials

219

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“…Mortars 1:2:9 presented higher air entrainment for 0% and 0.05% matrices. This trend is probably a function of the higher amount of lime in this mixture since this binder also contributes to air entrainment effect (Silva & Campitel, 2006;Sébaı̈bi et al, 2003). In the mixtures of 0.5% AEA, the air entrainment effect is similar, possibly due to the wide availability of surfactant molecules in the matrices (Ouyang et al, 2008;Du & Folliard, 2005).…”

Section: Physical Characterisationmentioning

confidence: 85%

“…This is probably a result of the increase in lime content since both mixtures present the volume ratio binders/aggregates constant (1/3). Lime is a light, fine air binder that knowingly promotes water retention due to its specific surface area, pore morphology, and chemical nature (Sébaı̈bi, Dheilly, & Queneudec, 2003).…”

Section: Physical Characterisationmentioning

confidence: 99%

Macroporous Mortars for Laying and Coating

Mendes

Pinto²,

Silva

et al. 2019

rdlc

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The envelope of a building is responsible for its physical protection against external agents, including humidity and temperature. Thus, the present work seeks to evaluate the effect of air entraining admixtures (AEA) in mortars for laying and coating to improve their physical and thermal performances. The AEA generates macropores, interrupting the system of canaliculi that allows the capillary absorption of water. The AEA used is based on biodegradable surfactant molecules of Linear Alkyl Benzene Sodium Sulfonate. Results compare physical tests (water absorption, capillary coefficient, specific gravity, and mechanical strength), and thermal evaluation (thermal conductivity and specific heat) from two mortars mixtures with varying levels of AEA. Scanning electron microscopy (SEM) of the pore system were also analysed. All mixtures studied presented higher workability and cohesion, reduced thermal conductivity, decreased specific heat, and a reduction in the effects of water absorption, capillary elevation and specific gravity (density). In this sense, the durability of mortars to humidity effect is potentially improved, along with several other properties. Therefore, this work seeks to contribute to the quality of built environments, as well as to promote the technological development of cement-based composites.

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“…Os benefícios do uso da cal nas argamassas mistas de acabamento têm sido associados restritamente ao aumento da plasticidade, dada a sua capacidade de retenção de água, e por favorecer a deformabilidade da argamassa endurecida (RATO, 2006;SÉBAÏBI, 2000;SÉBAÏBI;DHEILLY;QUÉNEUDEC, 2003, TATE, 2005 (JOHN, 2003).…”

Section: Lista De Tabelasunclassified

Influência da cal hidratada nas idades iniciais da hidratação do cimento Portland - estudo em pasta.

Quarcioni¹

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In the last decades, scientific and technological progress has shown a significant advance in the process of obtaining lime; however, there is gap knowledge with relation to its action when employed together with Portland cement. The use of lime in finishing mix mortars has only been positively associated to the fresh state plasticity and ability to deformation in the hardened state. It is necessary to collect data about the role of lime in the gradual development of the properties of mortars in the fresh state, linked to cement hydration. Such knowledge is important to develop formulas which can meet the required performance in different uses. The current demand of sustainable materials has favored the addition of minerals to the composition of Portland cement, and hydrated lime as an extern source of calcium, is a feasible alternative to the composition of byproducts and mixtures to be used as alternative binders. This research focused the cement-lime interaction aiming at identifying relevant chemical and physical phenomena which succeed the addition of water to the system. The paste study characterized the early ages of hydration by means of isothermal calorimetric, thermogravimetric, X-ray diffraction in material in the fluid state analysis collecting data in a consecutive basis. The experiments were carried out by using two proportions of Portland cement type CP II E with hydrated lime types CH I and CH III, calcic and dolomitc, respectively. By adding lime CH I to the cement-water system, calcium hydroxide is abundantly incorporated, with immediate saturation by means of hydroxide ions and calcium ions. The addition of lime CH III, also incorporates, in greater amount, finely ground limestone. Due to chemical effect because of the presence of lime, there is alteration in speed of hydration, forming products characteristics to the cement hydration process. Due to physical effect, the filler and the lime insoluble fraction of calcium hydroxide, present in the saturated environment, work as facilitators to the precipitation of the hydrated phases. The combined effect of these two phenomena accelerated hydration of Portland cement, mainly in the induction period, when ettringite and hydrated calcium aluminates formation reactions prevail. The advancement made in terms of knowledge permits to broaden comprehension on the behavior of mixtures in early stages, when hardening and consolidation processes are applied to mortars and help rheologic studies which involve their application. The understanding of the hydration mechanism in the presence of lime sets a base to study additions of active minerals to the clinker and produce new sustainable cementious compounds.

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Study of the water-retention capacity of a lime–sand mortar: Influence of the physicochemical characteristics of the lime

Cited by 36 publications

References 2 publications

Influence of aggregates grading and water/cement ratio in workability and hardened properties of mortars

Influence of aggregates grading and water/cement ratio in workability and hardened properties of mortars

Macroporous Mortars for Laying and Coating

Influência da cal hidratada nas idades iniciais da hidratação do cimento Portland - estudo em pasta.

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