Application of Nanoscience in Self-cleaning Properties of Concrete Facade for Development of Sustainable Environment

Document Type : REVIEW PAPER

Authors

1 Department of Architecture Engineering, Nour Branch, Islamic Azad University, Nour, Iran

2 Department of Architecture Engineering, Sari Branch, Islamic Azad University, Sari, Iran

3 Department of Civil Engineering, Tonekabon Branch, Islamic Azad University.

10.22034/ap.2020.1893251.1061

Abstract

Using mineral admixtures in cement composites as a way to improve their mechanical and sustainable environmental properties is a common practice in concrete technology. Among them nano-silica effectively influences the composite's early and long-term properties. In this study, the effect of different percentages of TiO2 (0, 2.5 and 5 %) on self-cleaning properties and water absorption of cement composites containing nano-silica were investigated. according to the use of different cementitious material (nano-silica) and TiO2 in mix proportions, to obtain mixtures with a desirable workability, superplasticizer was added in different volume percentages.Better size distribution and pore refinement lead to a denser cement matrix with low porosity which in turn considerably lower the water absorption of the cement composites. the maximum final water absorption according to ASTM C497 is 9% for method A and 8.5% for method B. Comparsions of water absorption tests as a result of adding of TiO2 and nano-silica in concrete show that the maximum final water absorption is 4.9% in N1 design mixture and the minimum final water absorption is 4.3% in N2 design mixture.The incorporation of TiO2 has positively affected the results for nano-silica containing specimens. A decrease of 6.5% and 11.1% between N1 and N3 respectively shows the positive effect of TiO2 on decrease of water absorption. The results show that TiO2 along with nanosilica has great potential for improving the environmental and self- cleaning properties of concrete facades of buildings in cities exposed to high levels of cleanliness.

Keywords


Aly M, Hashmi M.S.J, Olabi A.G, Messeiry M, Abadir EF, Hussain AI, 2012, Effect of colloidal nano-silica on the mechanical and physical behaviour of waste-glass cement mortar, Mater. Des. 33: 127–135. Doi: 10.1016/j.matdes.2011.07.008.
ASTM C150-07, (2007) Standard Specification for Portland Cement, ASTM International, West Conshohocken, Pennsylvania, USA.
ASTM C494-08, 2008, Standard Specification for Chemical Admixtures for Concrete, ASTM International, West Conshohocken, Pennsylvania, USA.
ASTM C109-08, 2008, Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens), ASTM International, West Conshohocken, Pennsylvania, USA.
ASTM C642-06, 2008, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete, ASTM International, West Conshohocken, Pennsylvania, USA.
ASTM C642-13, 2013, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete, ASTM International, West Conshohocken, PA.
ASTM C497-19,(2019, Standard Test Methods for Concrete Pipe, Concrete Box Sections, Manhole Sections, or Tile, ASTM International, West Conshohocken, PA.
BS EN 1340, 2003, Concrete kerb units. Requirements and test methods.
Chen J, Poon CS. 2009, Photocatalytic construction and building materials: from fundamentals to applications. Build Environ. 44(9): 1899–1906. Doi:10.1016/j.buildenv.2009.01.002.
Crupi V, Faio B, Gessini A, Kis Z, La Russa M.F, Majolino D, Masciovecchio C, Ricca M, Rossi B, Ruffolo S.A, Venuti V. 2018, TiO2- SiO2- PDMS nanocomposite coating with self- cleaning effect for stone material: Finding the optimal amount of TiO2. Construction and Building Materials. 166: 464-471. Doi:10.1016/j.conbuildmat.2018.01.172.
Dalvand A, Sharbatdar M.K, Kheyroddin A, Nikui A. 2014, Assessment of statistical variations in experimental impact resistance and mechanical properties of silica fume concrete, J. Sci. Iran. Trans. A: Civ. Eng. 21: 1577–1590.
Du H, Du S, Liu X. 2014, Durability performances of concrete with nano-silica, Constr. Build. Mater. 73: 705–712.
Gesoglu M, Guneyisi E, Sabah Asaad, D, Muhyaddin, GF, 2016, Properties of low binder ultra-high performance cementitious composites: Comparison of nanosilica and microsilica, Construction and Building Materials, 102: 706-713.
ISIRI, No. 8906, 2007, Standard water and wastewater pipelines of Iran. 1st.edition: 34-35.
Jayapalan AR, Kurtis KE. 2009, Effect of nano-sized titanium dioxide on early age hydration of Portland cement In: Bittnar Z, Bartos PJM, Nemecek J, Smilauer V, Zeman J, editors", Nanotechnology in construction: proceedings of the NICOM3 (3rd international symposium on nanotechnology in construction). Prague, Czech Republic. 267–273.
Lackhoff M, Prieto X, Nestle N, Dehn F, Niessner R. 2003, Photocatalytic activity of semiconductor-modified cement–influence of semiconductor type and cement ageing. Appl Catal B Environ. 43(3): 205–216. Doi:10.1016/S0926-3373(02)00303-X.
Li H, Zhang M.H, Ou J.P, (2006) Abrasion resistance of concrete containing nanoparticles for pavement.  Wear, 260(11–12): 1262–1266.  Doi: 10.1016/j.wear.2005.08.006.
 Li H, Zhang M.H, Ou J.P, (2007) Flexural fatigue performance of concrete containing nano-particles for pavement. Int J Fatig. 29(7): 1292–1301. DOI: 10.1016/j.ijfatigue.2006.10.004.
 Mohammadi Aloucheh R.  Alaee Mollabashi, Y, Asadi A, Baris O, Gholamzadeh, S. 2018, The role of nanobiosensors in identifying pathogens and environmental hazards. Anthropogenic Pollution Journal, 2 (2): 10-17. Doi:10.22034/AP.2018.572812.1024.
Murata Y, Obara KT. 1999, Takeuchi. Air purifying pavement: development of photocatalytic concrete blocks. J Adv Oxidat Technol. 4(2): 227–230.
Senff L, Hotza D, Lucas S, Ferreira VM, Labrincha  JA. 2012, Effect of nano-SiO2 and nano-TiO2 addition on the rheological behavior and the hardened properties of cement mortars. Materials Science and Engineering A, 532: 354-361. Doi:10.1016/j.msea.2011.10.102.
Taheri-Behrooz F, Memar Maher B, Shokrieh MM. 2015, Mechanical properties modification of a thin film phenolic resin filled with nano silica particles, Comput. Mater. Sci. 96: 411–415. DOI: 10.1016/j.commatsci.2014.08.042
Qing Z, Zenan Z, Deyu K and Rongshen C. 2007, Influence of nano-SiO2 addition on properties of hardened cement paste as compared with silica fume. Construct Build Mater, 21(3): 539–545. DOI: 10.1016/j.conbuildmat.2005.09.001.
Shannag MJ. 2000, High strength concrete containing natural pozzolan and silica fume, Cem. Concr. Compos. 22 (6): 399–406. DOI: 10.1016/S0958-9465(00)00037-8.
Yazici H. 2007, The effect of curing conditions on compressive strength of ultra-high strength concrete with high volume mineral admixtures, Build. Environ. 42 (5): 2083–2089. DOI: 10.1016/j.buildenv.2006.03.013. .