Investigation of the effect of alkali silica reaction (ASR) on properties of concrete pavement admixed with cow bone ash (CBA) by electrical resistivity test
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
1st International Conference on Sustainable Infrastructural Development
Abstract
The use of concrete in road pavements construction in view of its durability and cost
effectiveness over time have gained momentum. Cement concrete pavements however suffer
deterioration due to Alkali-Silica Reaction (ASR). This study therefore investigates the use of
Cow Bone Ash (CBA) in mitigating the effect of ASR using electrical resistivity test
(schlumberger array probe method). The results are then compared with American Society for
Testing and Materials (ASTM) standards and relevant literatures. The result of the study showed
that the average resistivity at 0%, 5%, 10%, 15%, 20% and 30% CBA replacement are 298.87
Ωm, 306.23 Ωm, 215.02 Ωm, 489.31 Ωm, 382.34 Ωm and 272.53 Ωm respectively. This
indicates that the peak resistivity is obtained at 15% CBA replacement which is the optimal
replacement level for ASR inhibition in the concrete. The result also shows that the concrete
samples are corrosion free with the least resistivity value on the 7th day at 30% CBA addition
(163.03 Ωm) and the maximum value at 20% CBA addition on the 56th Day (1069.54 Ωm). The
study concluded that ASR and reinforcement corrosion can be effectively controlled between
15% and 20% cement replacement by CBA in concrete/rigid pavements
Description
Staff Publication