PT999
Structural
- Oct 3, 2002
- 150
I am specifying underpinning with concrete, with the top 2 inches to be drypacked. Should I provide a time interval between the concrete placement and the drypacking work.
I had in mind 4 days from concrete placement to drypacking work (drypacking with non shrink grout) and then additional 3 days for drypack to cure before going to the next set of pins, thus for a total of 7 days.
Does concrete shrink only between the time of placement and initial set, or is this a gradual process continuing.
I had in mind 4 days from concrete placement to drypacking work (drypacking with non shrink grout) and then additional 3 days for drypack to cure before going to the next set of pins, thus for a total of 7 days.
Does concrete shrink only between the time of placement and initial set, or is this a gradual process continuing.
