However, there still remains a possibility that other additional geologic attributes and scaling relationships can be used to predict or bracket the range of hydrologic behavior of fault zones. The fault types (normal, reverse, and strike-slip) by themselves do not appear to be a clear classifier of the hydrology of fault zones. The fault core can have permeability up to seven orders of magnitude lower than the damage zone. The permeability of damage zone is in the range of two to three orders of magnitude higher than the protolith.
In most of cases the damage zone isthe one that is controlling the flow in the fault zone and the surroundings. The core usually acts as a barrier to the flow across it, whereas the damage zone controls the flow either parallel to the strike or dip of a fault. The common elements of a fault include a core, and damage zones. They can be used as an effective means for ASR screening test of existing structures both in the field and in laboratory.Through an extensive literature survey we find that there is very limited amount of work on fault zone hydrology, particularly in the field using borehole testing. The results of this study indicated that the fluoresced gel technique provided the satisfied results which confirmed the accelerated expansion test from previous study. The amount of reactive coarse aggregates was found in the range of 5-90% of total coarse aggregate content, which was supported by the expansion results of same cored samples from previous study. The results of reflected area indicated the evidence of ASR gel at aggregate’s rim and the nearly areas as well as in some cracks in the matrix of 9 in 11 samples of the first set. It was study on areas of suspected ASR gel in the interface zone (ITZ), aggregates and paste in the vicinity. It was done on ten random cored samples from different cracked structures of ten year-aged project and the other three cored samples from no-crack structure of one building and two bridges, ages older than 40 years. The study of the first alkali silica reaction (ASR) case in Thailand was conducted on fluoresced gel under UV light technique.
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