The effectiveness of ethyl silicate as consolidating and protective coating to extend the durability of earthen plasters

García-Vera, Victoria Eugenia; Tenza-Abril, Antonio José; Lanzón, Marcos

doi:10.1016/j.conbuildmat.2019.117445

Cited by 17 publications

(5 citation statements)

References 29 publications

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“…The product SAE based on silicic acid ester (ethyl silicate) proved to be the best consolidant in relation to the strength improvement of the earth mortar. This finding is in agreement with the results of recently published studies (La Russa et al, 2019;Garcı ´a-Vera et al, 2020) and it can be explained by the supposed formation of chemical bonds between the consolidating product and the treated material. After treatment with SAE, over time, atmospheric water replaces the -OC 2 H 5 groups with -OH groups.…”

Section: Mechanical Characteristicssupporting

confidence: 93%

Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Ryukhtin,

Slížková,

Strunz

et al. 2023

J Appl Cryst

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Stone or rendered facades of historical buildings often encounter loss of cohesion after long-term weathering. Specialist consolidating agents containing nanoparticles which can penetrate the degraded layer are used to extend the lifetime of such facades. Clay mortar prepared in the laboratory was used in the present study as a material for testing the effectiveness of several consolidating agents. Changes in porosity after treatment of the sample layers were assessed using small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy techniques. The scattering differed for the various samples, mainly in the medium range of scattering vector magnitudes. The cause of the scattering was ascribed to three populations of pores: large (micrometres), medium-sized (thousands of ångströms) and small (hundreds of ångströms). While the non-treated sample and the sample treated with a silicic acid ester-based product do not exhibit significant differences, the sample treated with a nano-lime suspension shows a decrease of 16% in the volume fraction of medium-sized pores. A difference was also observed in the sample treated with a dihydrogen ammonium phosphate solution: the size of the medium pores increased while their volume fraction decreased, and a change in the large pores was observed. The modelled small pores remained unaffected by the consolidating treatment.

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Section: Mechanical Characteristicssupporting

confidence: 93%

Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Ryukhtin,

Slížková,

Strunz

et al. 2023

J Appl Cryst

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“…Franzoni et al [19] studied and compared the effectiveness of tetraethyl orthosilicate, sodium silicate solution, and nanosilica on the surface treatment of reinforced concrete structures in terms of morphology and microstructure, and showed that tetraethyl orthosilicate performed the best in terms of resistance to water penetration, chloride penetration, and carbonation, with significant improvements. García-Vera et al [20] found that tetraethyl orthosilicate can reduce the total volume of pores in stucco, reduce the capillary water absorption and permeability of stucco, and reduce the impact of rain, acid rain, and sulfuric acid on stucco's durability. Franzoni et al [21] investigated the effects of TEOS treatment by piezometric porosimetry, scanning electron microscopy, water absorption, compressive strength tests, and spectrophotometry, and the results showed that the TEOS-treated sintered clay brick samples had a good penetration depth (about 10 mm), a reduction in porosity, a significant reduction in water absorption, a significant increase in compressive strength, and a positive aesthetic effect.…”

Section: Introductionmentioning

confidence: 99%

Effect of Modified Tetraethyl Orthosilicate Surface Treatment Agents on the Permeability of Airport Pavement Concrete

2022

Coatings

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In this paper, three modified tetraethyl orthosilicate surface treatment agents were prepared by using tetraethyl orthosilicate (TEOS) as the preparation monomer, isobutyltriethoxysilane (IBTS) as the hybridizer, and acrylic acid, phosphoric acid, and hydrochloric acid as the catalysts. The effects of the three modified tetraethyl orthosilicate surface treatment agents on the permeability of airport pavement surface concrete were investigated by water absorption tests, water contact angle tests, water penetration resistance tests, chloride ion penetration resistance tests, and carbonation tests, and the mechanisms of action of the modified tetraethyl orthosilicate surface treatment agents were analyzed by microscopic tests. The results showed that all three tetraethyl orthosilicate surface treatment agents could significantly improve the impermeability of concrete, among which the modified tetraethyl orthosilicate surface treatment agent with hydrochloric acid as the catalyst had the most obvious effect on the improvement of the impermeability of concrete. Acrylic acid was weaker than hydrochloric acid as the catalyst of a modified tetraethyl orthosilicate surface treatment agent for the improvement of concrete impermeability; it was only slightly stronger than hydrochloric acid as the catalyst of modified tetraethyl orthosilicate surface treatment agent in terms of the improvement of concrete’s resistance to water penetration, and the difference between the two was not significant. Phosphoric acid as a catalyst of the modified tetraethyl orthosilicate surface treatment agent was the least effective for concrete impermeability; it was only stronger than the other two modified tetraethyl orthosilicate surface treatment agents in the improvement of concrete resistance to carbonation, and the carbonation depth of the concrete was only 1 mm in 28 days. SEM and MIP tests showed that the modified tetraethyl orthosilicate surface treatment agents improved the impermeability of concrete mainly by producing additional hydrated calcium silicate gel to plug microcracks and pores, reduce the total porosity of the concrete and the number of multi-harmful and harmful pores, and improve the compactness of the concrete. The test results can provide a reference for the development of modified tetraethyl orthosilicate surface treatment agents and their application in airport pavement surface engineering.

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“…Therefore, for application where contact with water may occur, there is a crescent need to enhance the resistance of earthbased mortars to weathering [33][34][35][36]. Several research studies have been performed with the objective of increasing earth plasters durability, though natural products are hardly recommended for this purpose [37,38].…”

Section: Introductionmentioning

confidence: 99%

Effect of innovative bioproducts on the performance of bioformulated earthen plasters

Parracha

Silva

et al. 2021

Construction and Building Materials

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The effectiveness of ethyl silicate as consolidating and protective coating to extend the durability of earthen plasters

Cited by 17 publications

References 29 publications

Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Microstructural changes in building materials after various consolidation treatments studied by small-angle neutron scattering, mercury intrusion porosimetry and scanning electron microscopy

Effect of Modified Tetraethyl Orthosilicate Surface Treatment Agents on the Permeability of Airport Pavement Concrete

Effect of innovative bioproducts on the performance of bioformulated earthen plasters

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