Aerogel-based renders with lightweight aggregates: Correlation between molecular/pore structure and performance

Júlio, Maria de Fátima; Soares, António O.; Ilharco, Laura M.; Flores‐Colen, Inês; Brito, Jorge de

doi:10.1016/j.conbuildmat.2016.07.103

Cited by 69 publications

(21 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As discussed previously, HSAM M7 samples with 1.89% aerogel loading achieved the highest compressive strength gain exhibited dense and packed surface compared to the control samples due to accelerated carbonation reaction. In addition, at magnification x10000, HSAM M7 samples exhibited more uniform microstructure morphology with very less visible macro-pores as compared to the control samples as supported by the studies done by D. Fatima Julio et al (2016)[31], which indicates overall porosity reduction due to the accelerated carbonation reaction induced by the carbonated silica aerogel addition.…”

supporting

confidence: 69%

Novel cement curing technique by using controlled release of carbon dioxide coupled with nanosilica

Jassam

Kow

yang-zhi

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

Nanotechnology has attracted a lot of interest in the modification of building materials involving nanoparticles. Among the nanoparticles available, the incorporation of nanosilica draws intense attention due to the similarity of its chemical composition with cement and its pozzolanic properties. In this work, the potential capability to utilise CO2 in improving cement composites properties through carbonation acceleration mechanism was explored. In this study, various type of nano silica was used as a CO2 carrier and incorporated into cement mortar design with different amount of carbonated silica loading, ranging from 0.55 wt% to 2.42 wt% and cured in water and ambient air condition. The aim of this study is to examine the effects on the compressive strength of nano-silica impregnated with CO2 and incorporated into cement mortar. From the results, it was found that at 1.89% silica loading, the hydrophilic silica mortar (HSAM) samples can achieve the highest compressive strength of 34.1 MPa at 7 days and 40.7 MPa at 28 days, with a percentage gain of +38.06% and +17.29% respectively as compared to blank samples. However, the incorporation of silica for more than 1.89 wt% resulted in a negative effect on the *Revised Manuscript Click here to view linked References compressive strength gain of HSAM samples. By the incorporation of 2.42 wt%, the samples showed a significant drop in compressive strength of-21.46% at 7 days and-17.29% at 28 days. The results proved that nano-silica coupled with CO2 can accelerate curing of cement mortar by means of carbonation.

show abstract

supporting

confidence: 69%

Novel cement curing technique by using controlled release of carbon dioxide coupled with nanosilica

Jassam

Kow

yang-zhi

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…The presence of expanded clay guarantees values of mechanical strength above the minimum of 0.4 MPa from EN 998-1, for thermal renders however significantly increases the thermal conductivity coefficient (from 0.034 of B Aero for 0.12 for A Aero+EC ) (Júlio et al, 2016). Therefore, both lightweight aggregates and paste formulation contribute to the balance between compressive strength and thermal conductivity.…”

Section: Resultsmentioning

confidence: 99%

In-Situ Tests on Silica Aerogel-Based Rendering Walls

Flores‐Colen¹,

Pedroso²,

Soares³

et al. 2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

View full text Add to dashboard Cite

In this paper, two aerogel-based renders are characterized based on in-situ testing of walls prototypes. The in-situ tests to assess the mechanical performance are: pull-off, surface impact tests and compressive strength on collected samples. The physical performance includes the water resistance and thermal conductivity coefficient. The tests carried out to assess water-resistance are: Karsten tube, moisture meter and capillary water absorption of collected samples. The thermal performance was tested based on infrared thermography and thermal conductivity transient method. The combination of these in-situ tests allowed a better performance characterization of the aerogelbased renders and characterized the applied renders. These results were carried out under two national research projects (Nanorender and P2020 PEP).

show abstract

“…Moreover, the industrial-based formulations, which present the highest mechanical properties, tend to present lower performance in terms of thermal behaviour. The insertion of silica aerogel is associated with the lowest λ, but at the same time strongly related to lower mechanical performance, probably due to an increased water need, to the fragility of the aerogel and to some interfacial weakness between this nanomaterial and the matrices [25,[68][69][70].…”

Section: Discussion Of the Pca And Factor Analysismentioning

confidence: 99%

“…Research works (laboratory) Silica aerogel [25,[65][66][67][68][69][70][71][72][73] S1 to S9 Research works (semi-industrial) Silica aerogel with others [25,[66][67][68][69] I1 to I21 Industrial product (industrial) EPS, cork, perlite, silica aerogel [74][75][76][77][78][79][80][81][82][83][84] Although all calculation procedures being widely known and easily found in statistics literature [85,86], their implementation using statistical software makes its analysis more complete. Therefore, all data was inserted into an Excel data matrix.…”

Section: L1 To L5mentioning

confidence: 99%

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

Self Cite

View full text Add to dashboard Cite

This research provides a statistical analysis of the mechanical and physical properties of thermal insulating mortars developed in the laboratory and by the industry with and without the incorporation of nanomaterials. This was evaluated by carrying out a uni and bivariate analysis, principal components and factor analysis, cluster analysis, and the application of regression models. The results show that it is possible to find associations between these mortars’ properties, but also how these formulations’ development can be approached in the future to achieve better overall performance. They also show that the use of nanomaterials, namely silica aerogel, significantly improved the mortars’ thermal insulation capabilities, allowing us to obtain mortar formulations with thermal conductivities below the values presented by classic thermal insulating materials. Therefore, with this investigation, other researchers can support their product-development choices when incorporating nanomaterials to reduce mortars’ thermal conductivities, increasing their production efficiency, overall multifunctionality, and sustainability.

show abstract

Aerogel-based renders with lightweight aggregates: Correlation between molecular/pore structure and performance

Cited by 69 publications

References 35 publications

Novel cement curing technique by using controlled release of carbon dioxide coupled with nanosilica

Novel cement curing technique by using controlled release of carbon dioxide coupled with nanosilica

In-Situ Tests on Silica Aerogel-Based Rendering Walls

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Contact Info

Product

Resources

About