Some people like to refer to concrete as cement. But that is technically incorrect. Cement is just one of the main ingredients in concrete, along with water and aggregates. So it's a bit like referring to a beer as a bottle of yeast.
That said, cement is pretty integral to concrete and it's largely the reason why the embodied carbon is so high in this widely-used building material. According to Brian Potter, cement production is responsible for somewhere between 5-10% of global CO2 emissions.
This is coming from the roughly 4.25 billion metric tons of cement that is produced annually and the 30 billion tons of concrete that it ends up in. The world likes concrete. And in particular, China likes concrete.
China alone is now producing about half of the world's cement. And since consumption generally tracks production, and the consumption of cement generally translates into concrete, China is using, by far, the most concrete.
I don't know what the right answer is to this particular carbon problem, but
Some people like to refer to concrete as cement. But that is technically incorrect. Cement is just one of the main ingredients in concrete, along with water and aggregates. So it's a bit like referring to a beer as a bottle of yeast.
That said, cement is pretty integral to concrete and it's largely the reason why the embodied carbon is so high in this widely-used building material. According to Brian Potter, cement production is responsible for somewhere between 5-10% of global CO2 emissions.
This is coming from the roughly 4.25 billion metric tons of cement that is produced annually and the 30 billion tons of concrete that it ends up in. The world likes concrete. And in particular, China likes concrete.
China alone is now producing about half of the world's cement. And since consumption generally tracks production, and the consumption of cement generally translates into concrete, China is using, by far, the most concrete.
I don't know what the right answer is to this particular carbon problem, but
Brian Potter's latest construction physics post
is perhaps a good place to start thinking about it. In it, he covers who is producing it, where it is being used, and how we might get to a world with less concrete.
In fact, a big part of what I do for a living is imagining what things could be in the future. However, the bias that humans have toward the status quo has been well documented by people like Seth Godin, as well as many others. It is easier to defend that which already exists. Here's how Seth puts it:
All one has to do is take the thing we have now as a given (ignoring its real costs) and then challenge the defects and question the benefits of the new thing, while also maximizing the potential risk.
So as I was reading this recent blogTO article about the work of Stephen Velasco, I wasn't surprised to see some of the responses. Stephen has built an outstanding 3D model of all the towers that are currently planned or under construction in Toronto. Here's what that looks like:
For some of you, this is exciting. And for others, this may look like too much density. In both cases, we might think we are being fair and reasonable in our assessment, but the reality is that it's actually quite difficult to be a neutral judge. We are all guilty of poor logic and too much emotion.
But here's a good mental exercise, put forward by Seth, to test your logic: flip the story and then see if you still feel the same way.
In this particular case, imagine that all of the above proposed buildings are already built. This is the city that we all live, work, and play in. This is the status quo. Now consider an exciting new proposal being put forward to demolish many/most of these buildings, create more surface parking lots in the core, industrialize our waterfront, and
Brian Potter's latest construction physics post
is perhaps a good place to start thinking about it. In it, he covers who is producing it, where it is being used, and how we might get to a world with less concrete.
In fact, a big part of what I do for a living is imagining what things could be in the future. However, the bias that humans have toward the status quo has been well documented by people like Seth Godin, as well as many others. It is easier to defend that which already exists. Here's how Seth puts it:
All one has to do is take the thing we have now as a given (ignoring its real costs) and then challenge the defects and question the benefits of the new thing, while also maximizing the potential risk.
So as I was reading this recent blogTO article about the work of Stephen Velasco, I wasn't surprised to see some of the responses. Stephen has built an outstanding 3D model of all the towers that are currently planned or under construction in Toronto. Here's what that looks like:
For some of you, this is exciting. And for others, this may look like too much density. In both cases, we might think we are being fair and reasonable in our assessment, but the reality is that it's actually quite difficult to be a neutral judge. We are all guilty of poor logic and too much emotion.
But here's a good mental exercise, put forward by Seth, to test your logic: flip the story and then see if you still feel the same way.
In this particular case, imagine that all of the above proposed buildings are already built. This is the city that we all live, work, and play in. This is the status quo. Now consider an exciting new proposal being put forward to demolish many/most of these buildings, create more surface parking lots in the core, industrialize our waterfront, and
It has been cold and snowy in Toronto lately, which is great if you're looking to shred pow on a snowboard, but suboptimal if you're trying to construct buildings. It pains me deep inside my bone marrow when we lose productive days to weather. But what can you do?
I was, however, thrilled to see this first glimpse (pictured above) of the lobby / co-working space at Junction House this morning. The slightly elevated section (which is the point of view of the above rendering) is the co-working area.
The reason it's elevated is that we needed the clearance below for our parking ramp. We thought about trying to make it retail, but a place for residents to hang out and work seemed like a pretty good idea.
A lot of us on the team are big fans of a great hotel lobby bar, but that's kind of challenging to do in a residential condominium. This is maybe the next best thing. It's been very popular with purchasers so far, but I'm looking forward to seeing how it performs in real life.
reduce
our overall population density.
Photo from the 1940s:
Photo from the 1960s:
Is this a better proposal?
It has been cold and snowy in Toronto lately, which is great if you're looking to shred pow on a snowboard, but suboptimal if you're trying to construct buildings. It pains me deep inside my bone marrow when we lose productive days to weather. But what can you do?
I was, however, thrilled to see this first glimpse (pictured above) of the lobby / co-working space at Junction House this morning. The slightly elevated section (which is the point of view of the above rendering) is the co-working area.
The reason it's elevated is that we needed the clearance below for our parking ramp. We thought about trying to make it retail, but a place for residents to hang out and work seemed like a pretty good idea.
A lot of us on the team are big fans of a great hotel lobby bar, but that's kind of challenging to do in a residential condominium. This is maybe the next best thing. It's been very popular with purchasers so far, but I'm looking forward to seeing how it performs in real life.
