Carbonation acceleration of calcium hydroxide nanoparticles: induced by yeast fermentation

López-Arce, Paula; Zornoza-Indart, Ainara

doi:10.1007/s00339-015-9341-7

Cited by 27 publications

(10 citation statements)

References 44 publications

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“…However, the addition of NaHCO 3 may induce the formation of salt efflorescence. Furthermore, other studies focused on creating a CO 2 -rich atmosphere in a yeast-sugar environment to accelerate the carbonation process and to increase the in-depth carbonation [26]. Recently, other studies suggested that the type of solvent could be critical for the nanolime effectiveness in highly porous substrates [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Sticky rice–nanolime as a consolidation treatment for lime mortars

2019

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For almost 1500 years, many ancient Chinese mortars have remained unaltered despite exposure to atmospheric agents. The main reason for this long-term durability is the addition of sticky rice water to the standard mortar ingredients (lime and sand) following traditional recipes. In recent years, these mortars have been methodically studied leading to the conclusion that amylopectin, a polysaccharide in the sticky rice, plays a crucial role in regulating calcite crystals growth, creating a denser microstructure and providing the mortar with hydrophobic properties which contributed to their survival. In recent decades, nanolime products based on Ca(OH) 2 nanoparticles suspended in alcohol or hydro-alcoholic medium have been extensively used for the consolidation of calcareous substrates mainly due to their chemical affinity and absence of side effects. Nanolime products have resulted in successful superficial consolidations. However, in-depth consolidation still needs to be achieved, and research needs to focus on ways to attain this objective. This study aimed to test a novel approach consisting of applying a pre-treatment of sticky rice and subsequently the nanolime. The resulting consolidation was evaluated by measuring changes of superficial cohesion, porosity, contact angle, drilling resistance, water absorption by capillarity, drying rate and aesthetic properties. The durability of the treatments was investigated by exposing samples to accelerated weathering. Results showed that the use of sticky rice in combination with nanolime yields a higher degree of consolidation increasing drilling resistance and delivering hydrophobic properties although prolonged exposure to high temperature and moisture can compromise treatment durability.

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Section: Introductionmentioning

confidence: 99%

Sticky rice–nanolime as a consolidation treatment for lime mortars

2019

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“…Progress in the use of consolidating products based on calcium hydroxide nanoparticles for the consolidation of carbonate stone materials has been increasing in the last years. One of the main objectives has been to improve its properties to ensure the success of the process, including control of morphology and size of the nanoparticles (24), rate and the effect of carbonation in crystal growth (25), degree of crystallinity, penetration depth, concentration of solution (23), additives, catalysers (26) or solvents, and solubility (27).…”

Section: Consolidants Based On Ca(oh) 2 Nanoparticles Applied In Rockmentioning

confidence: 99%

New nanomaterials for applications in conservation and restoration of stony materials: A review

et al. 2017

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In recent times, nanomaterials have been applied in the construction and maintenance of the worldÅLs cultural heritage with the aim of improving the consolidation and protection treatments of damaged stone. These nanomaterials include important advantages that could solve many problems found in the traditional interventions. The present paper aims to carry out a review of the state of art on the application of nanotechnology to the conservation and restoration of the stony cultural heritage. We highlight the different types of nanoparticles currently used to produce conservation treatments with enhanced material properties and novel functionalities.

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“…The carbonation process of nanolime may be accelerated or even completed by the addition of a source of CO 2 : baking soda (NaHCO 3 ) or yeast–sugar solutions . Upon adding an external CO 2 source, that is, a solution of NaHCO 3 , a conversion factor of 95 % can be reached .…”

Section: Alkaline Earth Metal Hydroxide Np Dispersionsmentioning

confidence: 99%

“…In a high‐humidity environment and without the favorable effect of the addition of CO 2 , conversion of 95 % to the same mineral phases (aragonite and calcite) for the same number of days can be achieved. Samples exposed to lower humidity (laboratory room conditions) display much lower rates of carbonation of the initial portlandite NPs and yield 85 % portlandite and 15 % calcite in 28 days . In the three different environments (with and without yeast at high humidity and without yeast under ambient conditions), all limestone specimens consolidated with these NPs show an increase in their mechanical properties.…”

Section: Alkaline Earth Metal Hydroxide Np Dispersionsmentioning

confidence: 99%

“…In the three different environments (with and without yeast at high humidity and without yeast under ambient conditions), all limestone specimens consolidated with these NPs show an increase in their mechanical properties. However, the NPs and the mixture of amorphous, nanocrystals and microcrystals of CaCO 3 cause the formation of a white crust and glazing on the treated stone surface …”

Section: Alkaline Earth Metal Hydroxide Np Dispersionsmentioning

confidence: 99%

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Inorganic Nanomaterials for Restoration of Cultural Heritage: Synthesis Approaches towards Nanoconsolidants for Stone and Wall Paintings

et al. 2018

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The synthesis of inorganic nanostructured materials for the consolidation of stone and wall paintings is reviewed. To begin, a description of the methods most commonly used to prepare nanoconsolidants is provided, particularly in the frame of colloid chemistry. Some concepts of the carbonation mechanism as well as the transport properties of some of these materials are addressed. An overview of the synthesis methods together with some of the application particularities of the distinct consolidants are presented thereafter. Furthermore, the requisites for efficient consolidants and some drawbacks of the nanoconsolidants are discussed.

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Carbonation acceleration of calcium hydroxide nanoparticles: induced by yeast fermentation

Cited by 27 publications

References 44 publications

Sticky rice–nanolime as a consolidation treatment for lime mortars

Sticky rice–nanolime as a consolidation treatment for lime mortars

New nanomaterials for applications in conservation and restoration of stony materials: A review

Inorganic Nanomaterials for Restoration of Cultural Heritage: Synthesis Approaches towards Nanoconsolidants for Stone and Wall Paintings

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