The quality of soil improvement and soil cement piles is managed by measuring unconfined compressive strength. But, this method has the problem that the collected improved soil needs to be cured for a certain period of time. Moreover, if their strength were not enough, it would require a large amount of work to repair or reconstruct. To solve this problem, we examined a method of measuring the amount of cement contained in the unsolidified mixture and using the results to estimate the strength of the cured mixture.
