Unconfined Strength of Nano Reactive Silica Sand Powder Concrete

Authors: Hossein Kabir, Mojtaba Sadeghi

Abstract:

Nowadays, high-strength concrete is an integral element of a variety of high-rise buildings. On the other hand, finding a suitable aggregate size distribution is a great concern; hence, the concrete mix proportion is presented that has no coarse aggregate, which still withstands enough desirable strength. Nano Reactive Silica sand powder concrete (NRSSPC) is a type of concrete with no coarse material in its own composition. In this concrete, the only aggregate found in the mix design is silica sand powder with a size less than 150 mm that is infinitesimally small regarding the normal concrete. The research aim is to find the compressive strength of this particular concrete under the applied different conditions of curing and consolidation to compare the approaches. In this study, the young concrete specimens were compacted with a pressing or vibrating process. It is worthwhile to mention that in order to show the influence of temperature in the curing process, the concrete specimen was cured either in 20 ⁰C lime water or autoclaved in 90 ⁰C oven.

Keywords: Nano reactive silica sand powder concrete, consolidation, compressive strength, normal curing, thermal accelerated curing.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129884

References:

[1] Brandt, Andrzej Marek, ed. Optimization methods for material design of cement-based composites. CRC Press, 1998.
[2] Abo-El-Enein, S. A., et al. "Physico-mechanical properties of composite cement pastes containing silica fume and fly ash." HBRC Journal 11.1 (2015): 7-15
[3] Commitee, A. S. T. M. "C09. ASTM C33-03, Standard Spesification for Concrete Aggregates." (2003).
[4] Hover, Ken. "Graphical Approach to Mixture Proportioning by ACI 211.1-91." Concrete International 17, no. 9 (1995): 49-53.
[5] AASHTO, M. "307 ASTM C 1240. “Standard Specification for Silica Fume Used in Cementitious Mixtures”." American society for Testing and Materials, Annual Book of ASTM Standards, Volume04 2.
[6] Byron, T., Ivery, B., & Flaherty, J. (2004). Concrete Batch Plant Operator Collepradi, M.,” Concrete Admixtures Hand Book” 2nd Edition Noys Publisher, pp. 359, (1995)
[7] Sancak, Emre, Y. Dursun Sari, and Osman Simsek. "Effects of elevated temperature on compressive strength and weight loss of the light-weight concrete with silica fume and super plasticizer." Cement and Concrete Composites 30.8 (2008): 715-721.
[8] Concrete Admixtures Hand Book. M Collepradi 1995.359.
[9] Wang, Chong, et al. "Preparation of ultra-high performance concrete with common technology and materials." Cement and Concrete Composites 34.4 (2012)
[10] Alrifai, Amjad, et al. "Paste and mortar studies on the influence of mix design parameters on autogenous shrinkage of self-compacting concrete." Construction and Building Materials 47 (2013): 969-976.
[11] Ghafari, Ehsan, Hugo Costa, and Eduardo Júlio. "Statistical mixture design approach for eco-efficient UHPC." Cement and Concrete Composites 55 (2015): 17-25.
[12] Kabir, H., Bakhshi, N., Bagheri, A. R., “An Experimental Investigation of Ultra-Fine Aggregate High Strength Concrete (UFAHSC)”, International Conference on Architecture, Structure and Civil Engineering (ICASCE'15), (2015): 8-13
[13] Amorós, J. L., et al. "Green strength testing of pressed compacts: an analysis of the different methods." Journal of the European Ceramic Society 28.4 (2008): 701-710.
[14] Kovler, Konstantin, and Nicolas Roussel. "Properties of fresh and hardened concrete." Cement and Concrete Research 41.7 (2011): 775-792.
[15] Richard P., Cheyrezy M., Composition of reactive powder concretes, Cem. Concr. Res. 25 (7) (1995) 1501–1511.