Traditional organic additives improve lime mortars: New old materials for restoration and building natural stone fabrics

Ventolà, L.; Vendrell, M.; Giráldez, P.; Merino, Luis Díez

doi:10.1016/j.conbuildmat.2011.03.020

Cited by 200 publications

(93 citation statements)

References 23 publications

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“…In the first case, the higher water content permits dissolution of Ca(OH) 2 that reacts with CO 2 to form more CaCO 3 , whereas the calcium complexes formed may act like pore sealants that reduce the permeability to CO 2 . Studies with lime mortar have shown the opposite performance, where cactus mucilage increased the carbonation depth with respect to the control (57).…”

Section: Accelerated Chloride Ion Diffusionmentioning

confidence: 99%

Influence of cactus mucilage and marine brown algae extract on the compressive strength and durability of concrete

Hernández¹,

Cano-Barrita²,

Torres-Acosta³

2016

Mater. construcc.

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This paper presents the mechanical performance and durability of concrete with water/cement (w/c) ratios of 0.30 and 0.60 containing cactus mucilage and brown marine seaweed extract solutions (at 0.5° Brix concentrations). Cylindrical specimens (100 mm×200 mm) were cast and moist-cured for 0 and 28 days. Compressive strength, rapid chloride permeability, and chloride diffusion tests were conducted to evaluate all of the concrete mixes at the ages of 60 and 120 days. In addition, accelerated carbonation tests were carried out on specimens at the age of 180 days by exposure to 23 °C, 60% RH and at 4.4% CO 2 for 120 days. The compressive strength results showed that only one concrete mix with admixtures increased in strength compared to the control. Regarding the rapid chloride permeability, chloride diffusion and carbonation, the results indicated that the durability of concretes containing organic additions was enhanced compared to the control. RESUMEN: Influencia del mucílago de cactus y extracto de algas pardas marinas en la resistencia a compresión y durabilidad del hormigón.Este trabajo presenta el comportamiento mecánico y de durabilidad de concretos con relaciones agua/cemento de 0.30 y 0.60, conteniendo soluciones de mucílago de nopal y extracto de algas marinas cafés (0.5 °Brix de concentración). Especímenes cilíndricos (100 mm×200 mm) fueron elaborados y curados en húmedo por 0 y 28 días. Se evaluó la resistencia a la compresión, permeabilidad rápida y difusión de cloruros a los 60 y 120 días de edad. Adicionalmente, se realizaron pruebas de carbonatación acelerada en especímenes con 180 días de edad, expuestos a 23 °C, 60% HR y 4.4% de CO 2 por 120 días. Los resultados de resistencia a la compresión muestran que únicamente una mezcla de concreto con adición orgánica incrementó su resistencia con respecto al control. Con respecto a la permeabilidad rápida a cloruros, difusión de cloruros y carbonatación, los resultados indican que la durabilidad de los concretos que contenían adiciones orgánicas fue mejorada con respecto al control.

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Section: Accelerated Chloride Ion Diffusionmentioning

confidence: 99%

Influence of cactus mucilage and marine brown algae extract on the compressive strength and durability of concrete

Hernández¹,

Cano-Barrita²,

Torres-Acosta³

2016

Mater. construcc.

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“…Ventolà et al, 2011). However, the introduction of cement in the middle of the 19 th century led to a decrease in its importance.…”

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confidence: 94%

Lime in the limelight

Dowling

O’Dwyer

Adley

2015

Journal of Cleaner Production

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“…This reaction generates calcium carbonate (CaCO 3 ), the parent compound of lime, and water, which is released at the same time. This carbonation process described is slow and affected by several factors such as the amount of moisture present (above 8% there is no visible formation of CaCO 3 ), the temperature, the CO 2 concentration and the porous structure of the material [27].…”

Section: The Reaction Mechanismsmentioning

confidence: 99%

“…There is usually an increase in weight due to the transformation of portlandite (Ca(OH 2 )) into calcite or aragonite (CaCO 3 ) [27].…”

Section: The Reaction Mechanismsmentioning

confidence: 99%

Lime mortars with heat treated clays and ceramic waste: A review

Matias¹,

Faria

Torres

2014

Construction and Building Materials

104

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The formulation and use of lime mortars with ceramic particles has, in the past, been a very common technique. Knowledge of such used techniques and materials is fundamental for the successful rehabilitation and conservation of the built heritage. The durability that these mortars have shown encourages the study of the involved mechanisms, so that they may be adapted to the current reality. The considerable amount of waste from old ceramics factories which is sent for disposal might present an opportunity for the production of reliable improved lime mortars. In this paper a number of studies that characterize old building mortars containing ceramic fragments are reviewed. The most important research undertaken on laboratory prepared mortars with several heat treated clays types is presented, specifically with incorporated ceramic waste.Some studies on the pozzolanicity of heat treated clays are examined and the heating temperatures that seem most likely to achieve pozzolanicity are presented. It was verified that some heating temperatures currently used by ceramic industries might correspond to the temperatures that will achieve pozzolanicity. Highlights: The use of air lime mortars with ceramics is well known from the past. Fine particles of heat treated clays have proven to be potentially pozzolanic. Repair mortars must have a behaviour similar to the ones already in place. Knowledge of old mortars is fundamental for the conservation of the built heritage. The use of ceramic waste in mortars has technical and environmental advantages.

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Traditional organic additives improve lime mortars: New old materials for restoration and building natural stone fabrics

Cited by 200 publications

References 23 publications

Influence of cactus mucilage and marine brown algae extract on the compressive strength and durability of concrete

Influence of cactus mucilage and marine brown algae extract on the compressive strength and durability of concrete

Lime in the limelight

Lime mortars with heat treated clays and ceramic waste: A review

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