Akademik Veri Yönetim Sistemi
17th International Istanbul Scientific Research Congress on Life, Engineering, Architecture and Mathematical Sciences, İstanbul, Türkiye, 28 - 30 Nisan 2024, ss.188-198
Corrosion inhibitors are a preferred method to prevent corrosion in
reinforced concrete structures. The reason for this is that they can be mixed
into concrete during production and are known to be more economical. In
addition to the most widely used inhibitor types commercially, green
environmental corrosion inhibitors are also preferred in the researches.
Reinforced concrete structures can be affected by environmental conditions at
the same time. Alkali silica reaction (ASR) is known as one of the conditions
that adversely affect strength. For this purpose, the effects of inhibitor use
on ASR were investigated. Mortar mix was prepared in accordance with ASTM
C1260. In the study, CEM I 42.5 R Portland cement and 0-4 mm fine aggregate
limestone with low active silica content were used. Three different corrosion
inhibitors were added to the fresh mortar mix during production. These
inhibitors are classified as inorganic (calcium nitrite), organic (amino
alcohol) and green-environmental (boron containing). Inhibitors were added to
the mix at 1% and 2% according to the cement dosage. Comparison was made with
control samples without inhibitors. The length changes of the samples were
measured at 3, 7 and 16 days intervals. In addition, FE-SEM analysis of the samples
at the end of the 16th day was performed to examine the microstructure. XRD
analyses were performed on the samples with the least and most length changes.
As a result, it was observed that the use of inhibitors did not have any effect
on ASR to accelerate the reaction. It was determined that the least length
change was 0.030% in the series where calcium nitrite and amino
alcohol-containing inhibitors were used at a rate of 2%.