IanO
Senior Member
I would assume that they are doing exceptionally thorough inspections on all structural elements.
Valley Line LRT/ Valley Line West | ?m | ?s | City of Edmonton
- Thread starter Daveography
- Start date
The_Cat
Senior Member
I wonder if there were different kinds of concrete, which cracked with the expansion.
Gronk!
Senior Member
More cracks on concrete LRT beam in Edmonton are not a structural concern: TransEd - Edmonton | Globalnews.ca
TransEd says two small cracks in the concrete at Davies Station are "non-structural" and unrelated to the pier cracks on the elevated tracks along the Valley Line LRT extension.
globalnews.ca
awstott
Active Member
I have a hard time believing a word Transed says. How many piers had structural issues originally according to them? It was 8 wasn't it? then ended up like 38? Let's not count their promised opening dates too that have come nad went numerous times.More cracks on concrete LRT beam in Edmonton are not a structural concern: TransEd - Edmonton | Globalnews.ca
TransEd says two small cracks in the concrete at Davies Station are "non-structural" and unrelated to the pier cracks on the elevated tracks along the Valley Line LRT extension.
Aaron_Lloyd
Active Member
"The piers only look like they're falling apart before the line even opens" is hardly any sort of win.
kcantor
Senior Member
i have a hard time believing the cracks that show in rod muldaner's twitter photo are “...two small non-structural surface cracks at the corners of a construction joint between two concrete pours..." per transed's statement:More cracks on concrete LRT beam in Edmonton are not a structural concern: TransEd - Edmonton | Globalnews.ca
TransEd says two small cracks in the concrete at Davies Station are "non-structural" and unrelated to the pier cracks on the elevated tracks along the Valley Line LRT extension.
the vertical cracking and spalling and exposing of rebar down the centre of the pier where the load is greatest doesn't look like non-structural expansion cracks at a re-entrant corner to me. but what do i know, i'm just a dumb developer.
awstott
Active Member
It's interesting in the article Transed says they have to wait for warmer weather to epoxy the cracks - it's warmer weather going to bring melting snow, which leads to water ingress into said cracks, and then a bunch of freeze thaw cycles. Isn't that just going to lead to more cracking and spalling?
northlands
Senior Member
My thoughts similar. They had no issue using tarped up scaffolding with frost fighters to epoxy and repair the other piers.
awstott
Active Member
They just put more scaffolding and tarps up in the last week around the two piers between Argyll and Coronet roads so why not just address this issue near the station too? Makes no sense, but I've stopped trying to apply logic to how Transed operates.
IanO
Senior Member
Not enough air spec'd?
Stevey_G
Active Member
Though I’m not there to assess the integrity of the beam myself, I am forced to agree with you. That looks like two shear cracks moving diagonally away from the load and a flex crack right at the midpoint - which is precisely where one would expect those things to be if a structure’s strength to handle it’s load was in question.i have a hard time believing the cracks that show in rod muldaner's twitter photo are “...two small non-structural surface cracks at the corners of a construction joint between two concrete pours..." per transed's statement:
View attachment 451432
the vertical cracking and spalling and exposing of rebar down the centre of the pier where the load is greatest doesn't look like non-structural expansion cracks at a re-entrant corner to me. but what do i know, i'm just a dumb developer.
Can anyone tell me what gives a concrete structure it’s strength?
Stevey_G
Active Member
Glenco
Senior Member
I didn’t think the city were using salt only gravel
awstott
Active Member
They quit using Calcium Chloride (Brine) in the city, however they are more often than not dumping pure road salt on the roads. You'll see the pink stuff where a truck has stopped and hasn't turned off the feeder fully - that's road salt. They used to use more gravel than salt back in the day, but ever since they had that sand recycling fiasco there has been a significant increase in the use of salt from what I've seen.
northlands
Senior Member
I've been told the exact same thing. They introduced the sand recycling program as the Edmonton area was running out of cheap sand, and when that audit revealed it to be a sham, they immediately moved to piloting brine and using multitudes more salt and sometimes almost no sand.