“FATIGUE ANALYSIS OF RIGID PAVEMENT BY USING IRON SLAG”

Abstract

Roads are essential for linking two locations, and they must endure millions of tons of traffic throughout the course of their useful lives. Rigid pavements collapse under two different circumstances. It is the first that is caused by fatigue stresses, and the second that is caused by temperature stresses. Slags are used as an additive in concrete mixes to partially replace fine particles, and it can also be used as a filler material. The use of admixtures can potentially improve the overall strength of the concrete mix. As a result, several pavement portions, referred to as single and composite sections, are proposed in the current study. Two distinct layers of concrete mix are used to construct composite portions. The compression strength test, the flexural strength test, and the fatigue test are performed on these single and composite sections in order to determine their resistance to compression, flexural strength, and fatigue characteristics. Iron slag is used to partially replace fine aggregates in concrete. Fatigue tests are conducted on various concrete pavement sections for varying stress ratios like 0.85, 0.75 and 0.65following the strength tests, which are conducted using flexural strength. Fatigue curves (S-N Curve) and fatigue equations for various pavement sections are comparedwith the standard number of repeats values specified in Table 6 of IRC: 58-2002, which shows that, the composite sections have more strength than the single admixed concrete section and conventional concrete section.