Research Articles | Challenge Journal of Concrete Research Letters

Effect of nano silica on cement mortars containing micro silica

İlknur Bekem Kara, Ömer Furkan Durmuş


DOI: https://doi.org/10.20528/cjcrl.2019.02.003

Abstract


The use of cement and concrete is becoming increasingly widespread all over the world. However, the high energy consumption required for the production of clinker and the greenhouse gas emissions generated during production negatively affect both the economy and the environment. In the studies conducted for many years, researchers have found that the substitution of various pozzolans with cement provides both technical advantages and environmental benefits. The use of pozzolans in cementitious composites provides advantages such as the improvement of the physical and mechanical properties of the material, the conservation of the environment and the economy in terms of the evaluation of industrial wastes. In recent years, studies on the use of nanoparticles in cementitious composites are positively. In this study, it was aimed to investigate the properties of fresh and hardened cement mortars using micro silica as pozzolan and nano silica as nanoparticle. For this purpose, four different cement pastes and mortars mixtures were prepared by substituting 0%, 1%, 2%, 3% nano SiO2 (silica) cement in mortar mixtures containing 5% micro silica. The effects of the nano silica on the micro silica-containing cement paste on the consistency and setting time were investigated. The mortar mixtures produced were subjected to flexural and compressive strength tests on days 7, 28 and 90th. SEM images of mortar mixtures were taken. As a result, it was found that 2% nano silica admixture of 5% micro silica containing cement admixture affects the flexural and compressive strength positively, whereas 2% nano silica admixture increased the flexural strength by 13% and compressive strength by 7%.


Keywords


mortar; micro silica; nano silica; strength

Full Text:

PDF

References


Abd El-Baky S, Yehia S, Khalil IS (2013). Influence of nano-silica addition on properties of fresh and hardened cement mortar. NANOCON Brno, Czech Republic, EU, 10, 16–18.

Amin M, Abu el-hassan K (2015). Effect of using different types of nano materials on mechanical properties of high strength concrete. Construction and Building Materials, 80, 116–124.

Bozoğlu Demirdöven J, Arditi D (2012). Nanotechnology applications in structures and construction management. 2. Project and Construction Management Congress, İzmir, Turkey, 43.

Çelik MH, Özgan E, Kösen N (2004). The Effect of crom magnesit brick dust on the starting and finishing setting time of portland cement. Journal of Polytechnic, 7(1), 79–85.

Çelik MH, Şimşek O, Sancak E (2001). The Effect of silica fume on the starting and finishing setting time of portland cement. Journal of Polytechnic, 4(4), 55–60.

Güneyisi E, Gesoğlu M, Al-Goody A, İpek S (2015). Fresh and rheological behaviour of nano-silica and fly ash blended self-compacting concrete. Construction and Building Materials, 95, 29–44.

Haruehansapong S, Pulngern T, Chucheepsakul S (2014). Effect of the particle size of nanosilica on the compressive strength and the optimum replacement content of cement mortar containing nano-SiO2. Construction and Building Materials, 50, 471–477.

Jo B, Kim C, Tae G, Park J (2007). Characteristics of cement mortar with nano-SiO2 particles. Construction and Building Materials, 21, 1351–1355.

Kumar A, Singh G (2018) Effect of nano silica on the fresh and hardened properties of cement mortar. International Journal of Applied Engineering Research, 13, 11183–11188.

Lee BY, Amal R, Jayapalan AR, Kurtis KE (2013). Effects of nano-TiO2 on properties of cement-based materials. Magazine of Concrete Research, 65(21), 1293–1302.

Li H, Xiao H, Yuan J, Ou, J (2004). Microstructure of cement mortar with nano-particles. Composites: Part B, 35, 185–189.

Li LG, Zheng JY, Zhu J, Kwan AKH (2018). Combined usage of micro-silica and nano-silica in concrete: SP demand, cementing efficiencies and synergistic effect. Construction and Building Materials, 168, 622–632.

Li LG, Zhu J, Huang ZH, Kwan AKH, Li LJ (2017). Combined effects of micro-silica and nano-silica on durability of mortar. Construction and Building Materials, 157, 337–347.

Oltulu M, Şahin R (2013). Effect of Nano-SiO2, nano-Al2O3 and nano-Fe2O3 powders on physico-mechanical properties of cement mortar containing silica fume. Ready Mixed Concrete Congress, İstanbul, Turkey, 225–235.

Özbora AA, Tarhan M, Engin Y (2013). The Role of nanotechnology in the future of concrete. Ready Mixed Concrete Congress, İstanbul, Turkey, 304–312.

Sanchez F, Sobolev K (2010). Nanotechnology in concrete-a review. Construction and Building Materials, 24, 2060–2071.

Topçu İB, Canbaz M (2002). Investigation of the interfacial surfaces of concrete with silica fume. ECAS 2002 International Building and Earthquake Engineering Symposium, Ankara, Turkey, 469–476.

TS EN 196–1 (2016). Methods of testing cement-Part 1: Determination of strength. Turkish Standards Institution, Ankara, Turkey.

TS EN 196–3 (2016). Methods of testing cement -Part 3: Determination of setting times and soundness, Turkish Standards Institution, Ankara, Turkey.

TS EN 197-1 (2012). Cement-Part 1: Composition, specification and conformity criteria for common cements. Turkish Standards Institution, Ankara, Turkey.

Zhang R, Cheng X, Hou P, Ye Z (2015). Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkage. Construction and Building Materials, 81, 35–41.

Zhanga B, Tana H, Shena W, Xua G, Maa B, Jia X (2018). Nano-silica and silica fume modified cement mortar used as surface protection material to enhance the impermeability. Cement and Concrete Composites, 92, 7–17.


Refbacks

  • There are currently no refbacks.