Recent content by dorydirect

Hello, After many tests, it seems that ANY combination of hard aggregates in my castings produces holes here and there which I try to prevent as much as possible. what is the best mix ratio from cement/sand ( no hard aggregates) for thin castings such as bowls and planters? I know that...

Thanks for your in depth answer. I dont know what GGBS i tried to look online but not sure where i can find it in israel and what they call it here the mix you suggest has no aggragres, is this ok? Thanks, Dor

Thanks a lot for this information my friend. I tried to used fibers but it seems to really made the mix not workable. i will buy a superplastizer and try again with it, thanks :) The casting of 10-20 mm is usually the thickness of the end concrete bowl that is coming out of the plastic mold...

Something like this bowl thickness of bowl inside bowl mold

Thanks for your replay! I am casting concrete candle holders, the can go to about 1 cm so i am looking for a grade or a custom mix that will prevent cracks as much as possible in the future. I am using sea sand but also have "regular" construction sand( dry), so i can use it if needed...

Thanks for your replay Mohammed my friend, i used M10 Grade do you recommend something else?

High-strength concrete grade is more ideal than a low-strength grade when casting into molds such as plastic bowls and silicone molds? I am using 0.3mm gravel along with sea sand as aggregates. Crack -safe is important! :) Many thanks!