Experimental Investigation of Ultra-High Performance Concrete Without utilizing vapor

Subject Areas : Analysis of Structure and Earthquake

Ramtin Rezakhani ¹ , محمدقاسم وتر ² , علی قمری ³ , yousef zandi ⁴

1 - Islamic Azad University of Sciences and Research of Qeshm
2 -
3 -
4 - Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

Received: 2024-12-24 Accepted : 2025-05-12 Published : 2025-05-21

Keywords: Ultra High Performance Concrete, Mix Design, Micro Steel Fibers, Silica Sand,

Abstract :

With the development of the construction industry and the necessity to build tall structures with high significance, constructing elements with smaller dimensions and longer service life has become essential. This has compelled engineers to create concrete with higher strength. Studies conducted in this regard over the recent years have led to significant advancements in improving the compressive and tensile strength of concrete. This has resulted in the emergence of "ultra-high-performance" concrete with compressive strengths exceeding 150 megapascals (1500 kilograms per square centimeter). One of the most important aspects of this type of concrete is its resistance to aggressive agents such as chloride ions and freeze-thaw cycles.In this research, micro steel fibers, Type I cement with a strength class of 52.5 kilograms per square centimeter, silica sand, silica fume, a polycarboxylate-based superplasticizer, and water were used. These were examined in five different mix designs. The curing of the samples was consistent, and the concrete's age was examined at 7 and 28 days. Compressive and Brazilian tensile strength tests were performed on the samples, and the optimal sample showed a compressive strength of 154 megapascals and a tensile strength of 21 megapascals.

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20]] وتر، محمدقاسم- بهبود رفتار لرزه‌ای اتصالات سازه‌های پیش‌ساخته بتنی با صفحات کناری(گزارش پژوهشی ۷۱۷۰ در سال ۱۴۰۴)-. پژوهشگاه بین‌المللی زلزله شناسی و مهندسی زلزله