A comparative study of petroleum coke and silica aerogel inclusion on mechanical, pore structure, thermal conductivity and microstructure properties of hybrid mortars

Bostancı, Levent

doi:10.1016/j.jobe.2020.101478

Cited by 12 publications

(8 citation statements)

References 45 publications

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“…The S4 sample is also the sample with the lowest compressive strength. This is consistent with other studies in the literature (Bostanci, 2020a;Bostancı et al, 2019). Median pore diameter-area (MPDA) and average pore diameter (APD) were significantly reduced by adding silica fume to the mixtures for this curing group.…”

Section: Mip Test Resultssupporting

confidence: 92%

“…The decrease in the thermal conductivity of the S4 sample with 0.50% aerogel loading is 17.4% compared to the control sample. The change of thermal conductivity coefficient in samples that cured in water is compatible with the literature (Bostanci, 2020a;Bostanci & Sola, 2018;Bostancı et al, 2019). In these studies, it was stated that adding a small amount of aerogel to the mortar mixture is sufficient to reduce the thermal conductivity coefficient.…”

Section: Thermal Conductivity Test Resultssupporting

confidence: 85%

“…The S3 sample is the sample with the lowest thermal conductivity coefficient with 1.733 W/mK in this curing group. As stated in previous studies, this size range corresponds to the average pore sizes of the aerogel used and this situation indicates the contribution of the aerogels to the development of the pore structure in the mortars (Bostanci, 2020a). At the same time, the apparent increase of the S3 sample in the 4-8 nm pore diameter range indicates that the pore type that is effective in determining the thermal conductivity of this sample is gel pores.…”

Section: Mip Test Resultssupporting

confidence: 74%

“…The pore structure of cement-based materials is effective on the mechanical and thermal properties of the materials. For this reason, being aware of the pore structure properties of the mortar samples such as mean pore diameter and pore size distribution is very important in terms of evaluating the mechanical and thermal properties of mortars (Bostanci, 2020a;Das & Kondraivendhan, 2012). In cement based materials, pore diameters can be measured in the range of nanometer to micrometer by mercury intrusion porosimetry test (Gao et al, 2016).…”

Section: Mip Test Resultsmentioning

confidence: 99%

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Effect of aerogel/silica fume under curing methods on properties of cement-based mortars

Uatundag

Sola²

2022

rdlc

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In this study, the mechanical, thermal and porosity properties of mortar samples containing aerogel and silica fume under different curing conditions were investigated. For this purpose, 0%, 0.25% and 0.50% by weight of silica aerogel as a cement additive and 10% silica fume as an industrial waste material were incorporated in the cement mixtures. The prepared mortar samples were exposed to curing process in water, the wetting-drying effect and MgSO4 effect for 16 weeks. The highest thermal conductivity reduction of 31.2% was obtained from the water curing sample with silica fume addition at an aerogel content of 0.25%. Maximum compressive and flexural strengths were determined respectively from samples with silica fume addition at an aerogel content 0.50% as 74.5 MPa and no aerogel content as 11.3 MPa by wetting-drying curing. However, the lowest thermal conductivity coefficient was measured as 1.458 W/mK from the sample at an 0.25% aerogel content containing silica fume which completed the curing process under the influence of MgSO4 with a highest compressive strength increase by 24.6%.

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Section: Mip Test Resultssupporting

confidence: 92%

Section: Thermal Conductivity Test Resultssupporting

confidence: 85%

Section: Mip Test Resultssupporting

confidence: 74%

Section: Mip Test Resultsmentioning

confidence: 99%

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Effect of aerogel/silica fume under curing methods on properties of cement-based mortars

Uatundag

Sola²

2022

rdlc

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“…The thermal conductivity was reduced by up to 35% when aerogel was incorporated up to 6 wt.% of the binder. [15][16][17] Furthermore, the addition of aerogel up to 80% caused a reduction of thermal conductivity by up to 95% (0.8-0.04 W/m.K). 6,18,19 Nevertheless, till date, the majority of the investigation focuses only on assessing the mechanical strength and insulating properties of the lightweight cement-based materials incorporating aerogel.…”

Section: Introductionmentioning

confidence: 99%

Aerogel and expanded perlite incorporated lightweight cementitious composites containing crushed glass: Evaluation of the drying shrinkage and alkali-silica expansion

et al. 2022

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Lightweight cementitious composite (LCC) produced by incorporating lightweight silica aerogel was explored in this study. Silica aerogel was incorporated as 60% replacement of fine aggregate (sand/crushed glass) in producing the LCC. The effect of aerogel on the drying shrinkage and alkali-silica expansion of LCC was evaluated and compared with those of lightweight expanded perlite aggregate. At the density of 1600 ± 100 kg/m3, the aerogel/ expanded perlite LCC had attained compressive strength of about 17/24 MPa and 22/26 MPa in mixtures with sand and crushed glass as a fine aggregate, respectively. The inclusion of aerogel and expanded perlite increased the drying shrinkage. The drying shrinkage of aerogel LCC was up to about 3 times of the control mixtures. Although the presence of aerogel and expanded perlite could reduce the alkali-silica expansion when partially replacing crushed glass, the aerogel-glass LCC still recorded expansion exceeding the maximum limit of 0.10% at 14 days. However, when 15% cement was replaced with fly ash and granulated blast furnace slag, the alkali-silica expansion was reduced to 0.03% and 0.10%, respectively. Microstructural observations also revealed that the aerogel with fly ash can help in reducing the alkali-silica expansion in mixes containing the reactive crushed glass aggregate.

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Effect of a low content of waste rubber inclusion on pore structure and thermal insulation properties of hybrid slag mortars

Bostancı

2022

Environ Sci Pollut Res

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A comparative study of petroleum coke and silica aerogel inclusion on mechanical, pore structure, thermal conductivity and microstructure properties of hybrid mortars

Cited by 12 publications

References 45 publications

Effect of aerogel/silica fume under curing methods on properties of cement-based mortars

Effect of aerogel/silica fume under curing methods on properties of cement-based mortars

Aerogel and expanded perlite incorporated lightweight cementitious composites containing crushed glass: Evaluation of the drying shrinkage and alkali-silica expansion

Effect of a low content of waste rubber inclusion on pore structure and thermal insulation properties of hybrid slag mortars

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