Cutting all day,

On Friday, a whole day i had an experinment on my Concrete reseach. I thought what i gonna do for my experiment and estimateed how long it takes to cut the experimental materials(concretes). When i started to make it happen the process of cutting was faster than i expected cuz the concrete wasnt harden enough. Finally, it took 4h to cut them into pieces. It was not hard experiments but it is gonna be troublesome to draw and find the quare section of the gravels inside. Ganbarimasu....