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

Ozlem Uatundag; Ozlem Celik Sola

doi:10.7764/RDLC.21.2.368

Authors

Ozlem Uatundag Istanbul University-Cerrahpasa, Department of Civil Engineering, Istanbul (Türkiye)
Ozlem Celik Sola Istanbul University-Cerrahpasa, Department of Civil Engineering, Istanbul (Türkiye)

DOI:

https://doi.org/10.7764/RDLC.21.2.368

Keywords:

aerogel, silica fume, curing prosedure, , thermal conductivity, porosity

Abstract

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%.

References

[ASTM. (2016). Standard Test Method for Measurement of Thermal Effusivity of Fabrics Using a Modified Transient Plane Source (MTPS) Instrument. ASTM International West Conshohocken, PA, USA.

Bostanci, L. (2020a). A comparative study of petroleum coke and silica aerogel inclusion on mechanical, pore structure, thermal conductivity and microstructure properties of hybrid mortars. Journal of Building Engineering, 31, 101478. https://doi.org/https://doi.org/10.1016/j.jobe.2020.101478

Bostanci, L. (2020b). Synergistic effect of a small amount of silica aerogel powder and scrap rubber addition on properties of alkali-activated slag mortars. Construction and Building Materials, 250, 118885. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2020.118885

Bostanci, L., & Sola, O. C. (2018). Mechanical Properties and Thermal Conductivity of Aerogel-Incorporated Alkali-Activated Slag Mortars. Advances in Civil Engineering, 2018. https://doi.org/10.1155/2018/4156248

Bostancı, L., Ustundag, O., Sola, O. C., & Uysal, M. (2019). Effect of various curing methods and addition of silica aerogel on mortar proper-ties. Gradjevinar, 71(8), 651–661. https://doi.org/10.14256/JCE.2469.2018

Cheng, A. (2012). Effect of incinerator bottom ash properties on mechanical and pore size of blended cement mortars. Materials & Design (1980-2015), 36, 859–864. https://doi.org/https://doi.org/10.1016/j.matdes.2011.05.003

Das, B. B., & Kondraivendhan, B. (2012). Implication of pore size distribution parameters on compressive strength, permeability and hydrau-lic diffusivity of concrete. Construction and Building Materials, 28(1), 382–386. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2011.08.055

Demirboǧa, R. (2003). Influence of mineral admixtures on thermal conductivity and compressive strength of mortar. Energy and Buildings, 35(2), 189–192. https://doi.org/https://doi.org/10.1016/S0378-7788(02)00052-X

Demirboğa, R., & Gül, R. (2003). The effects of expanded perlite aggregate, silica fume and fly ash on the thermal conductivity of lightweight concrete. Cement and Concrete Research, 33(5), 723–727. https://doi.org/https://doi.org/10.1016/S0008-8846(02)01032-3

Dong, H., Gao, P., & Ye, G. (2017). Characterization and comparison of capillary pore structures of digital cement pastes. Materials and Structures, 50(2), 154. https://doi.org/10.1617/s11527-017-1023-9

Fátima Júlio, M., Ilharco, L. M., Soares, A., Flores-Colen, I., & de Brito, J. (2016). Silica-based aerogels as aggregates for cement-based ther-mal renders. Cement and Concrete Composites, 72, 309–318. https://doi.org/10.1016/j.cemconcomp.2016.06.013

Fátima Júlio, M., Soares, A., Ilharco, L. M., Flores-Colen, I., & de Brito, J. (2016). Aerogel-based renders with lightweight aggregates: Correla-tion between molecular/pore structure and performance. Construction and Building Materials, 124, 485–495. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2016.07.103

Feng, J., Xiao, Y., Jiang, Y., & Feng, J. (2015). Synthesis, structure, and properties of silicon oxycarbide aerogels derived from tetraethylorto-silicate /polydimethylsiloxane. Ceramics International, 41(4), 5281–5286. https://doi.org/https://doi.org/10.1016/j.ceramint.2014.11.111

Fu, X., & Chung’, D. D. L. (1997). Effects of Silica Fume, Latex, Methylcellulose, and Carbon Fibers on The Thermal Conductivity and Spe-cific Heat of Cement Paste. In Cement and Concrete Research (Vol. 27, Issue 12).

Gao, T., Jelle, B. P., Gustavsen, A., & Jacobsen, S. (2014). Aerogel-incorporated concrete: An experimental study. Construction and Building Materials, 52, 130–136. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2013.10.100

Gao, Y., Wu, K., & Jiang, J. (2016). Examination and modeling of fractality for pore-solid structure in cement paste: Starting from the mercury intrusion porosimetry test. Construction and Building Materials, 124, 237–243. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2016.07.107

Garrido, R., Silvestre, J. D., & Flores-Colen, I. (2017). Economic and Energy Life Cycle Assessment of aerogel-based thermal renders. Jour-nal of Cleaner Production, 151, 537–545. https://doi.org/https://doi.org/10.1016/j.jclepro.2017.02.194

Gesoglu, M., Güneyisi, E., Asaad, D. S., & Muhyaddin, G. F. (2016). Properties of low binder ultra-high performance cementitious compo-sites: Comparison of nanosilica and microsilica. Construction and Building Materials, 102, 706–713. https://doi.org/10.1016/J.CONBUILDMAT.2015.11.020

Gomes, M. G., Flores-Colen, I., da Silva, F., & Pedroso, M. (2018). Thermal conductivity measurement of thermal insulating mortars with EPS and silica aerogel by steady-state and transient methods. Construction and Building Materials, 172, 696–705. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2018.03.162

Haranath, D., Wagh, P. B., Pajonk, G. M., & Rao, A. V. (1997). Influence of sol-gel processing parameters on the ultrasonic sound velocities in silica aerogels. Materials Research Bulletin, 32(8), 1079–1089. https://doi.org/https://doi.org/10.1016/S0025-5408(97)00086-X

Ibrahim, M., Biwole, P. H., Achard, P., Wurtz, E., & Ansart, G. (2015). Building envelope with a new aerogel-based insulating rendering: Experimental and numerical study, cost analysis, and thickness optimization. Applied Energy, 159, 490–501. https://doi.org/https://doi.org/10.1016/j.apenergy.2015.08.090

Li, P., Wu, H., Liu, Y., Yang, J., Fang, Z., & Lin, B. (2019). Preparation and optimization of ultra-light and thermal insulative aerogel foam concrete. Construction and Building Materials, 205, 529–542. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2019.01.212

Liu, Y., Shi, C., Zhang, Z., & Li, N. (2019). An overview on the reuse of waste glasses in alkali-activated materials. Resources, Conservation and Recycling, 144, 297–309. https://doi.org/10.1016/J.RESCONREC.2019.02.007

Liu, Z., Ding, Y., Wang, F., & Deng, Z. (2016). Thermal insulation material based on SiO2 aerogel. Construction and Building Materials, 122, 548–555. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2016.06.096

Ng, S., Jelle, B. P., Sandberg, L. I. C., Gao, T., & Wallevik, Ó. H. (2015). Experimental investigations of aerogel-incorporated ultra-high per-formance concrete. Construction and Building Materials, 77, 307–316. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2014.12.064

Ng, S., Jelle, B. P., & Stæhli, T. (2016). Calcined clays as binder for thermal insulating and structural aerogel incorporated mortar. Cement and Concrete Composites, 72, 213–221. https://doi.org/https://doi.org/10.1016/j.cemconcomp.2016.06.007

Ng, S., Jelle, B. P., Zhen, Y., & Wallevik, Ó. H. (2016). Effect of storage and curing conditions at elevated temperatures on aerogel-incorporated mortar samples based on UHPC recipe. Construction and Building Materials, 106, 640–649. https://doi.org/https://doi.org/10.1016/j.conbuildmat.2015.12.162

Rao, A. P., Rao, A. V, & Pajonk, G. M. (2005). Hydrophobic and physical properties of the two step processed ambient pressure dried silica aerogels with various exchanging solvents. Journal of Sol-Gel Science and Technology, 36(3), 285–292. https://doi.org/10.1007/s10971-005-4662-1

Saboktakin, A., & Saboktakin, M. R. (2015). Improvements of reinforced silica aerogel nanocomposites thermal properties for architecture applications. International Journal of Biological Macromolecules, 72, 230–234. https://doi.org/https://doi.org/10.1016/j.ijbiomac.2014.08.024

Schröfl, C., Gruber, M., & Plank, J. (2012). Preferential adsorption of polycarboxylate superplasticizers on cement and silica fume in ultra-high performance concrete (UHPC). Cement and Concrete Research, 42(11), 1401–1408. https://doi.org/10.1016/J.CEMCONRES.2012.08.013

TS EN. (2000). Mortar Testing Method, Part 11. Measurement of Compressive and Flexural Tensile Strength of Mortar.

Xu, Y., & Chung, D. D. L. (1999). Increasing the specific heat of cement paste by admixture surface treatments. In Cement and Concrete Research (Vol. 29).

Xu, Y., & Chung, D. D. L. (2000). Effect of sand addition on the specific heat and thermal conductivity of cement. In Cement and Concrete Research (Vol. 30).

Zaidi, A., Demirel, B., & Atis, C. D. (2019). Effect of different storage methods on thermal and mechanical properties of mortar containing aerogel, fly ash and nano-silica. Construction and Building Materials, 199, 501–507. https://doi.org/10.1016/j.conbuildmat.2018.12.052

Zaidi, I. K., Demirel, B., Atis, C. D., & Akkurt, F. (2020). Investigation of mechanical and thermal properties of nano SiO2/hydrophobic silica aerogel co-doped concrete with thermal insulation properties. Structural Concrete, 21(3), 1123–1133. https://doi.org/10.1002/suco.201900324