Choose the Best Mix of Light Weight Nano Silica Composite Concrete with Mineral Pumice in Bending and Compressive Behavior of Concrete Beams

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Alireza Taherizadeh, Maryam Abbasi, Alireza Ashofteh


In recent years, with nanotechnology, new approaches to the development of concrete technology have been introduced. Nanoparticles, due to their dimensions, can play the role of filling the cavities. These particles are used to increase concrete strength and bonding among concrete components.In addition, nano-silica is used to accelerate the hydration reactions of ordinary cement in cement mortar. In most structures, concrete is considered as the main section of structure or part of it. Reducing dead load, and ultimately  the force on the building, make necessary using lightweight concrete for countries like Iran, which are among the world's most seismically affected areas, and with high financial and fatal damage caused by the earthquake.In this study, 9 samples were prepared by experimental methods of mixing designs with 1, 2, 3,4 and 5% weight percent nano-silica as the substitute of cement material with mineral pumice to produce lightweight concrete with proper compressive and flexural strength record of 7, 28, and 90-day samples evaluated and it showed that adding 3% nano silica to lightweight concrete with mineral lacquer caused compressive resistance as 280, 314 and 341 and flexural strength as 110.4, 115.8 and 139 kg / cm2 for ages 7, 28 and 90 days old.

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