Mechanical properties and durability of concrete specimens containing nano silica in sulfuric acid rain condition. (10th April 2018)

• Record Type: Journal Article
• Authors: Mahdikhani, Mahdi; Bamshad, Omid; Fallah Shirvani, Mohammad
• Is Part Of: Construction & building materials. Volume 167(2018)
• Page Start: 929
• Page End: 935
• Publication Date: 2018-04-10
• Subjects: Nanoparticles -- Electrical resistance -- Compressive strength -- Water absorption -- Weight loss -- Acid rain simulator, (ARAS) -- Sulphuric acid; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.01.137
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Acid RAin Simulator (ARAS) was made to simulate acidic condition. Sorptivity coefficient and weight loss percentage have inverse relation with nano silica content. Electrical resistance, sorptivity coefficient and weight loss percentage increase by raising the acidity of solution. Compressive strength of concrete declines by increasing the acidity of solution. Abstract: During acid rain concrete begins to lose its mechanical strength that lead to cracking, weight losing and finally, destruction of structures. Since the control of acid rain and its effects on the environment is inevitable, many researchers have carried out different studies on this issue and have offered solutions to eliminate or control acid rain's effects. One of these new methods is to use nanoparticles as cementitious or additive materials. In recent years, several studies have been focused on the nano silica, with the goal of increasing strength and durability of concrete. In this paper, the influence of nano silica on performance of cementitious materials in acid rain condition has been studied. Four concrete mixtures were prepared containing 0–6% of nano silica. Mechanical properties and durability of concrete, such as weight losing, compressive strength, electrical resistance and water absorption in acid rain condition with various pH values will be discussed. The results show that nano silica has positive effects on mechanical properties and durability of concrete specimens. In addition, by increasing the pH value of acid rain, mechanical properties and durability of concrete specimens are improved.