Effect of Micro and Nano silica as supplementary cementitious materials on mechanical properties of cement mortar

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 337

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شناسه ملی سند علمی:

CEMENT05_089

تاریخ نمایه سازی: 5 آذر 1398

چکیده مقاله:

In recent decades, the usage of different additives has been developed to enhance the properties of cement-based materials. Cement mortar is a basic cementitious material with a composite structure that, creates diverse properties by utilizing various admixtures. Due to this fact, the present study is to evaluate the effect of micro and nano-silica on the mechanical properties of cement mortar. For this purpose, 16 mix designs were considered with various replacement percentages of nano silica (0, 1.4, 2.8, and 4.2%) and micro silica (0, 4, 9 and 13%) in forms of alone and together at the age of 3, 7 and 28 days. So, a comparative probe was carried out to evaluate the effect of different percentages of micro and nano-silica on the mechanical properties of cement mortar. In this regard, different macroscopic (porosity, compressive and flexural strength) tests were conducted on compressive and flexural specimens. The results show that the simultaneous addition of micro and nano-silica has a considerable effect on improving the cement mortar properties by decreasing the porosity and following that enhancing the strength properties of cement mortar in comparison with adding micro or nano-silica alone.

نویسندگان

S.A Emamian

MS.C Structural Engineering, Department of Civil Structural Engineering, Hakim Sabzevari University, Sabzevar, Iran

H Eskandari-Naddaf

Associate Professor, Department of Civil Structural Engineering, Hakim Sabzevari University, Sabzevar, Iran