concrete pour
concrete pour
(OP)
Hi,
What is recommended Height of Horizontal joint on 500mm thick and 5.5 mt. high vertical wall of water reservoir?
Or no need of horizontal construction joint.
thanks for your time,
rakesh
What is recommended Height of Horizontal joint on 500mm thick and 5.5 mt. high vertical wall of water reservoir?
Or no need of horizontal construction joint.
thanks for your time,
rakesh





RE: concrete pour
RE: concrete pour
RE: concrete pour
RE: concrete pour
Thanks for your reply. What is time to monitor cold joint for different mix? is there any handy table available? We have difference of tem too; start at -5 and at end +7.
Ron- please corrects me if I understand your second sentence wrong. We pour wall full height at 3mt length. if we do so how we can vibrate concrete.
Thanks again.
rakesh
RE: concrete pour
What is the -5, +7, temperatures? I don't see the relevance if concrete and environment are controlled per requirement for cold region concreting. I could be wrong though.
RE: concrete pour
I've used a horizontal joint to step a wall in a lift station to save concrete. But lift stations have subtle differences, with varying water levels vs a reaervoir. Most of the action in a lift station is within 8 to 10 ft from the base. With a reservoir, there are advatages in using the full depth, which puts the horizontal joint in play.
RE: concrete pour
JedClampett noted the need to avoid horizontal joints. You need to make sure you get continuous concrete placement to avoid a horizontal or vertical cold joint....which will leak!
RE: concrete pour
Thanks for all replies.
thanks
rakesh
RE: concrete pour
Kind regards
Elfarra
RE: concrete pour
- No horizontal joints (not allowed by several codes)
- No problem to pour in one time ; depending on the method statement for concrete production + delivery + bucket lifting + pouring + vibrating, you have to plan vertical joints with stainless steel plate and hypalon seal in the centre and additionall rebars at the cold joint,
- The method statement will give you the detailed time schedule depending on available batching plant capacity and truck mixers (nb, capacity) and distance from production area to cosntruction site
- This time will impact the concrete mix design and may be impose to use a plasticizer and /or a set retarding admixture
- Trials mixes and tests are highly recommended to check concrete consistency (sump) as it will need proper vibration at 5 m depth
- Using tremi-pipes is recommended to limit at max 1,00 m the free drop height in order to avoid segregation
- Vibration is very important to avoid segregation and honeycomb defects, it shall be properly designed and organized,
- For a 500 mm thick wall, concrete temp should be monitored and formwork removal allowed when temperature difference between concrete surface and outisde becomes less than 20°C .
RE: concrete pour