indentify the defect
indentify the defect
(OP)
Dears
please analyze the defect encountered in the water tank wall. concrete is flowable 500mm poured at a hieght about 3.5m using mobile pump.
Kindly explain type od defect, REASONS AND REPAIR
THANKS
please analyze the defect encountered in the water tank wall. concrete is flowable 500mm poured at a hieght about 3.5m using mobile pump.
Kindly explain type od defect, REASONS AND REPAIR
THANKS





RE: indentify the defect
Dik
RE: indentify the defect
RE: indentify the defect
RE: indentify the defect
Dik
RE: indentify the defect
Anyone building water tanks should know better. Now concrete repair is required, i.e. chipping out the defective areas and using concrete repair mortars. Then probably an appropriate membrane.
RE: indentify the defect
If only aesthetic, it can be patched with surface patching mortar. If structural, epoxy injection with additional forming is required.
RE: indentify the defect
Dik
RE: indentify the defect
RE: indentify the defect
RE: indentify the defect
Hokie...yup
Repair, although generally structurally OK can be problematic from an appearance vantage.
Dik
RE: indentify the defect
RE: indentify the defect
In my experience in concrete works I use ASCC (Almost Self Compating/Consolidating Concrete), when I have flowing concrete in spec. The "Almost" means that I need to intruduce (no too much but some) vibration to my mix-ready concrete, which is flowing concrete. It works, but all depends on workmanship and concrete recept / technology etc.
ad. repair technology:
I use SIKA system to solve this kind of problem with concrete
RE: indentify the defect
Or due to rough and absorbent formwork?
Please shed some more light based on the enclosed pic
Thanks
RE: indentify the defect
Dik
RE: indentify the defect
RE: indentify the defect
Link
In the June 2001 issue of ACI’s magazine, Concrete International, an article by Suprenant cites several references summarizing the effects of free fall. He concludes that free fall of concrete directly over reinforcing bar or at high slumps doesn’t cause segregation or reduce compressive strength, but restricting free-fall height does decrease concrete production rates and increase owner costs.
RE: indentify the defect
It could be made by worn out (sometimes dirty) formwork or by not this same ready-mix concrete in each supply or by more watery concrete. In my opinion, my experience.
I would control framework, pouring proccess, and workship's work during pouring, and concrete recept as well.
RE: indentify the defect
For a water-retaining structure, as hokie66 noted, this one repair and a membrane or coating. I would also be concerned about internal voids. Test for them.