AhmedJ.J.
Structural
- Sep 15, 2021
- 9
Hi all,
I am designing a mat foundation on piles with dimensions approx (30 x 30 x 2.5 m) (100 x 100 x 8.2 ft). We decided to make a horizontal construction joint so the first pour is 1.5m (5 ft) thick and the second pour is the rest thickness. My question is; do I have to provide shrinkage reinforcement for the top face of the first lower pour? Or the mat bottom flexural reinforcement will do the job if the area exceeds 0.0018Ag (which it does)?
ACI 318-19 cl R24.4.3.2 states that "The resulting area of reinforcement may be distributed near the top or bottom of the slab, or may be distributed between the two faces of the slab as deemed appropriate for specific conditions." I don't know if I can apply this statement on mat foundation or not.
I am designing a mat foundation on piles with dimensions approx (30 x 30 x 2.5 m) (100 x 100 x 8.2 ft). We decided to make a horizontal construction joint so the first pour is 1.5m (5 ft) thick and the second pour is the rest thickness. My question is; do I have to provide shrinkage reinforcement for the top face of the first lower pour? Or the mat bottom flexural reinforcement will do the job if the area exceeds 0.0018Ag (which it does)?
ACI 318-19 cl R24.4.3.2 states that "The resulting area of reinforcement may be distributed near the top or bottom of the slab, or may be distributed between the two faces of the slab as deemed appropriate for specific conditions." I don't know if I can apply this statement on mat foundation or not.