let me guess, the didn’t fill it with iron that would corrode and expand and blow out the concrete? or the fact that it has an excess of fired lime that re-seals cracks?
You do know that rebar frames are completely essential for most concrete construction right? It’s not some conspiracy to induce failure. Concrete by itself can only handle compression forces - the rebar allows it to handle tension, torsion and sheering.
Yep, it’s the the lime. And:
“ The team is now working on commercializing their concrete as a more environmentally friendly alternative to current concretes.”
Quick lime as a ‘concrete’ is nothing new, or newly rediscovered though… The story seems to come up every few years, and anyone that has used a fluidised lime boiler knows how good quick lime is at forming concrete.
that’d be great, a lot of buildings are torn down just because the concrete cracks.
i’d be interested in seeing how using better concrete impacts overall costs and of course emissions. because the building ends up standing for a lot longer, the temperature isolation becomes very sub-par over time. that would increase total energy consumption compared to buildings that are frequently rebuilt.
Meh. Lime mortar absorbs and releases moisture. IRC “Roman” lime concrete is much the same.
Don’t get me wrong, I’m a huge fan, but that kind of thing isn’t compatible with modern insulation. You end up with damp and mould issues in the walls.
Sure it works great in uninsulated stuff though. But people and governments want every room in a building to be insulated nowadays. The whole one warm room, the rest of the building is cold and you’d better wear a three piece suit or heavy wool jumper thing, is abhorrent to our spoiled western arses.
Also: the Romans didn’t build their buildings that high. AFAIK Lime concrete has lower tensile and compressive strength, which is an issue with high rise buildings.
Sure it works great in uninsulated stuff though. But people and governments want every room in a building to be insulated nowadays. The whole one warm room, the rest of the building is cold and you’d better wear a three piece suit or heavy wool jumper thing, is abhorrent to our spoiled western arses.
Spoken like somebody who doesn’t live where rooms would be intolerably hot without insulation most of the year.
let me guess, the didn’t fill it with iron that would corrode and expand and blow out the concrete? or the fact that it has an excess of fired lime that re-seals cracks?
You do know that rebar frames are completely essential for most concrete construction right? It’s not some conspiracy to induce failure. Concrete by itself can only handle compression forces - the rebar allows it to handle tension, torsion and sheering.
Rebar is a god damn conspiracy against the youth my dude
Yep, it’s the the lime. And: “ The team is now working on commercializing their concrete as a more environmentally friendly alternative to current concretes.”
Quick lime as a ‘concrete’ is nothing new, or newly rediscovered though… The story seems to come up every few years, and anyone that has used a fluidised lime boiler knows how good quick lime is at forming concrete.
And, coincidentally, every time the story comes up there’s a company ready to sell you the magic roman concrete.
that’d be great, a lot of buildings are torn down just because the concrete cracks.
i’d be interested in seeing how using better concrete impacts overall costs and of course emissions. because the building ends up standing for a lot longer, the temperature isolation becomes very sub-par over time. that would increase total energy consumption compared to buildings that are frequently rebuilt.
but very promising.
Meh. Lime mortar absorbs and releases moisture. IRC “Roman” lime concrete is much the same.
Don’t get me wrong, I’m a huge fan, but that kind of thing isn’t compatible with modern insulation. You end up with damp and mould issues in the walls.
Sure it works great in uninsulated stuff though. But people and governments want every room in a building to be insulated nowadays. The whole one warm room, the rest of the building is cold and you’d better wear a three piece suit or heavy wool jumper thing, is abhorrent to our spoiled western arses.
Also: the Romans didn’t build their buildings that high. AFAIK Lime concrete has lower tensile and compressive strength, which is an issue with high rise buildings.
Spoken like somebody who doesn’t live where rooms would be intolerably hot without insulation most of the year.