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#concrete

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Public
Y⃒̸̷̝̜̙ͥͥͥngmar

It's done! Here's the epic moment after the 11m concrete beam has left the yard (leaving a nice brown skidmark).

I was going to film it, but the gusty wind blew the camera over before it got interesting.

The other beam was damaged and broke in half, leading to some sketchy cutting of rebar under load (ping!) and dragging two halves out. Had to shovel the concrete debris out of the garden, that took even longer.

No more stupid concrete in the garden 🥳

A crooked gate leading out of the yard and into the meadow with two barns. A giant 11m concrete beam has been dragged through the gate, leaving torn up dark soil and mud. It's now resting in the leaves under some 40 year old oaks.
A large concrete beam has been pulled sideways with a tractor and steel cable. It's broken in half, leaving a mess of crumbling concrete, rebar and for some reason a plastic pipe embedded inside of it. The soil is churned up thoroughly and muddy.
Close-up of the front of a concrete beam well buried in the soil. A chain leads around the front, connects to a wire rope and goes over a small steel car wheel (without tyre) and off into the distance. The wheel sits on a wooden plank shoved under the beam.
#Homestead#Farm#DIY
Public
Benjamin Carr, Ph.D. 👨🏻‍💻🧬

We Finally Know Why Ancient #Roman #Concrete Was So Durable
The properties of this concrete have generally been attributed to its ingredients: pozzolana, a mix of volcanic ash, and lime. When mixed with water, materials can react to produce strong concrete. Roman concrete was probably made by mixing quicklime directly with pozzolana and water at extremely high temperatures, by itself or in addition to slaked lime, a process team calls 'hot mixing' results in lime clasts.
sciencealert.com/we-finally-kn

ScienceAlert · We Finally Know Why Ancient Roman Concrete Was So DurableThe ancient Romans were masters of building and engineering, perhaps most famously represented by the aqueducts.
Continued thread
Public
Y⃒̸̷̝̜̙ͥͥͥngmar

After I finally got the beam out of the garden, I hooked up the other end and turned it 90 degrees so it can go thick end first towards the gate behind which I want it to be.

But before I can pull it the rest of the way, I had to tidy up the other beams spread out in the yard. Luckily our tractor fits between fruit trees, sheds and old bee hives and I could pull them all into a pile, one at a time. One shattered!

This took the rest of the day 😓

A crumbled concrete beam exposing several long pieces of rebar. The rest is pulled together next to it.
Small blue tractor standing under some large apple trees next to an old dog house, rear towards a couple concrete beams it has pulled into an orderly array. The sun is shining and some snow covers the mud and moss.
The yard at sunset. Some snowy lines show where the concrete beams used to be, now they're all on the right, packed tightly with the short pieces on top.
#Concrete#Beam#Homestead
Public
Y⃒̸̷̝̜̙ͥͥͥngmar

Got Mr. Beam moved. Schlepped a long wire rope from the grain store, massive 20mm ø. An hour undoing a stupid knot in the middle of it with steel spikes and hammer. Long enough to reach a distant spruce with the 3 ton hand winch.

It moved but this pace got boring fast, so I used the tractor to pull sideways at the midpoint of the tensioned rope. That moved it much faster!

The soil there was much more solid, so I could pull it by tractor the rest of the way.

A stubborn concrete beam is connected by a chain around it to a long, thick wire rope that leads off into the distance to a far away tree near a house. Lots of churned up half frozen mud is all around.
At the other end, a thick cargo strap is led around a tree and connected to a 3 ton hand winch that pulls the wire rope with a short chain extension. The rope is tensioned and suspended in the air.
Mr. Beam, now completely out of the garden, resting alongside a fence before being rehitched to get pulled from the other end. The sun shines through some puffy clouds.
#Homestead#Concrete#Beam
Public
Y⃒̸̷̝̜̙ͥͥͥngmar

Ok, giving up for now. I'll check how long I need the beam to be for the sawmill foundation and then I'll cut it into parts.

It's just too heavy to pull from the soft soil there. Dug over half the yard with the wheels. Broke off the concrete crown with the chain. Even fetched the stone sled from the forest and winched it onto that (actually winched the sled under the beam, because beam don't move). Even with that it won't budge more than a few mm at a time.

Infernal concrete beam, now with the concrete crown shattered in two pieces, exposing a thick steel pipe, steel plate and four nuts holding the pre-stressed reinforcements together. A piece of thick chain, pickaxe and thick wire rope are laying around.
Pulling the beam sideways out of its groove worked, but did not improve things greatly. Here the tractor is in the garden, pulling at a 90 degree angle and the beam has left its slot in the dirt over the entire length.
The problem. The tractor is hitched to the beam with a thick chain. The tyres are dug deep into the soft and moist soil there. Lifting the three point hitch up and down does sometimes gain a few cms but not enough. It's just not enough traction.
A final attempt, with an old home welded steel sled for dragging behind a tractor while workers toss fieldstones onto the sled for retrieval. Here a hand winch is trying to pull the beam over an old plow share set up as a ramp onto the sled with the chain. This worked, except the winch pulled tractor and sled backwards under the beam, which did not budge.
#Homestead#Farm#Tractor
Public
Y⃒̸̷̝̜̙ͥͥͥngmar

Giving @davepolaschek's suggestion a try. The T-40 wheel I found in the garage is getting some use as uh, round lever? What do you even call this.

It kinda worked. Well, it didn't budge as I was pulling, but when it fell over while under tension it levered the beam out of the ground sideways and a little forward.

Still refuses to go further, but I'm having a strong coffee and sweets and shall stubbornly continue.

The pesky concrete beam in our garden is now attached with a very beefy chain to a very beefy piece of wire rope. A big tractor steel wheel (sans tyre) is rolled in front of it, with the wire rope leading over the wheel and off to a tractor not depicted here. The ground is churned up from pulling many other concrete beams out of the garden already.
Same arrangement, excep the wheel has fallen over sideways. The wire rope still leads through what used to be its top. The beam however has shifted in the direction of the fallen wheel and left its deep groove for the first time.
The rear end of the beam with a gap that is now about a metric foot longer (we only have metric feet here, sorry, they're about one foot long though). The standard reference foot including boot is next to it. It's a size 44, in case you need to calibrate.
#Farm#Mechanics#Concrete
Public
Trevor

New project! I've been wanting to try concrete sculpture for a while - there are some incredible artists doing miniature brutalist objects that I'm enamoured with, but it wasn't until this recent surge of pride in the Canadian identity that I finally decided what to make. Based on Stuart Ash's design for the Centennial Commission's logo from 1965, I've retained the 11 equilateral triangles but removed the stem, and have added some depth to the design. The goal is to have the design shift and change as lighting conditions change, but always retain the shape of the leaf. This will be 3D printed, then I'll make a silicone mold, and finally I'll cast in in concrete. It's printing now; can't wait to see how it looks as a test.
#OhCanada #Canada #3Dprinting #concrete #Brutalism #art #sculpture #modernism
canadamodern.org/centennial-sy

A render of the Centennial leaf with a concrete texture applied. 11 equilateral triangles, 6 arranged in a hexagon with 5 serving as points, evoke a maple leaf in a modernist style. The light & shadow playing on insets in the triangles make the identical sections each unique.
The leaf as displayed in the slicing software, showing later lines.
The original design of the leaf as used in the Centennial celebrations of 1967.
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