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@Ron Wherever the concrete surface will be in touch with soil. like foundation. I'm sharing my experience here. if you have other opinion, please share.

@cvg The tradtional method of curing by water takes 7~10 days. However, By using curing compound (Eg, Fosroc concure compound) you can start painting bitumen almost immediately. (3~5 hr to dry)

the column hight is about 4.5 m above the foundation and 0.8 m above the ground. we need to increase it to 1m above the ground.

I left my question without much detail to hear from you many different ideas. That will help me in future. but anyway, at the end of the column we have 4 anchor bolts. 1m long pre-installed .that will hold a steel structure. I'm not really aware of the load that this steel structure will carry...

We have constructed a ( 1x1 meter) column last week. and for some reason we need to increase the height of this column for about 20cm. do we need to plant steel for this column? if yes, how can we do it? by knowing that the reinforcement of this column is 20mm - 20 piece equally distributed in...

You can use a curing compound after you pour the concrete. this will make the curing period shorter