Final assignment – Fungus shelves

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Inspired by the shapes of tree-growing shelf fungi I set out to do my own ones in concrete to use as ordinary shelves. Fungus-looking shapes were drawn on MDF boards and glued 90 degrees to each other, adding a stretchy t-shirt fabric to make up the front side. The fluid mix from assignment 4 was used, including the plasticizer to be able to have some working time before it would harden.

Two casting rounds were made, the first one with two smaller 15 cm wide prototypes. Plastic and fabric was tried for the front side, with fabric turning out as the winner with its more smooth look.

For the second round 3 shelves were made, one smaller 20cm wide variant with simple round edges and two considerably larger around 35-45 cm wide with wobbly edges.

The second round didn’t quite turn out as I wanted it to. The fabric I was using wasn’t strong enough for the massive amount of concrete and I had a hard time controlling the shape. I also failed filling the molds up with enough concrete to fill up all of the shape, as I realized when the concrete was already hardening. Also, the sheer weight of such big concrete objects would make them quite unsuitable for hanging on a wall.







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A smaller sized mold with a stronger fabric stretched to its very limits would have made it easier and more stable to work with and easier to fill to the brim.

In the end I am most satisfied with my small shelf from the first round, and the cloudy white molds themselves were really the most beautiful things I have produced in this course.


/Jakob Lif

Final work

Smocking by Erika Vegerfors








Work in progress…

Final assignment.

In the final task, I chose to develop the smocking textile method that I tested earlier. I have now constructed a pattern that “grows”. The idea is that the pattern should extend across several tiles. In the end result, I expect to get three different sizes of tiles, 200×200 mm, 200×150 mm and 150x 350mm which together cover a surface of 350×350 mm and one pattern.

The difficulty in this task was to design the pattern and calculate fabric usage for the 350×350 mm surface due the textile is pulled together by the smocking.

I made the mold in plywood and I mounted the textile with staples on the wood skeleton.

The casting went well at first… But, at three o’clock in the night I forgot to pour in lime stone in the last casting of three. I see this now as a study and can compare how the concrete tiles comes out with or without lime stone in the concrete mix.

The entire process of constructing patterns, to sew, make a wooden mold, cast and finally piling off the fabric stuck in the concrete, makes the process very time-consuming, but very fun.

What I present here on the blog today is a work in progress…





Final Assignment, balloon blobs


I wanted to investigate in how concrete would act when being restrained by a flexible material (a balloon). By adding several balloons together inside a rigid form, they would also take shape by each other and the external shape. Like a specific brick-system, where they only can be placed in one specific way but then be perfect.

In the first stage i investigated how to cast into balloons and how the result would be. By using a funnel and making a more liquid mix (I used the mix of the flexible formwork but added water), the concrete easily flew into the balloons. By adding an extra tension to the shapes, with the string, the shapes became more interesting!

Before casting into the balloons, the rubber had to be stretched out, to maximise the amount that fits into them. So I simply blew them up for a few minutes before casting. I then started to fill the external wooden frame with the concrete filled ballons. To some I added rubberbands, to others I did nothing, and a few of the balloons where also heart-shaped which by themselves created interesting shapes!

When the box was filled and dried, this was how they look, the tob being more 3dimentional and the bottom more restricted:

And when stripping them of the ballons and then returning them to the shape, this is how they looked (because a lot of water was added, it created a layer on top where only water and a little bit of sand and concrete gathered, and cracked):

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Final Assigment: Straw casting

For my final assigment i decided to work with straw, a really common and natural material. In particular I thought of using it on one hand because i am really inspired by the contrast/connection that can be created by mixing this two material (as shawn in the sketches) and on the other hand to see if it possible to remove the straw and get a nice surfece on the concrete block:

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First of all I tried to find different kind of straw and similars to test in an easy way:

slide 2The first one is made only with straw taken by a strawbale, the second oneusing suerthin sticks of straw, for both the sample I used 50% of cement and 50% of water:slide 3

The third one is made with thicker straw sticks and with a more dense concrete (65% concrete, 35% water), for the last one I used smal wood sticks that i found in the ground and for the concrete I used again the 50%/50% mixture:

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Looking on the result, the third one i thought it was potentially the most interesting, then I tried to develop it more and try to see if it was possible to generate a wave shaped connection between concrete and straw:

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For theis sample i used a relly liquid mixture, with 65% of water, my intention was to generate a concrete that was able to go through the straw as much as possible.

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The result was quiet good, maybe the best one i did!, the cement followed exactly the shape that i did with the straw, and the surface is really clean and bright.

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After the first success I tried again the same mixture with the same process but with double amount of concrete just to see what happen, but the result is not super exiting, and is also really heavy.

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Then I found some transparent plastic straws and i tried to do the same with them, using a more dense mixture of concrete ( 30% cement 70% water) the result was surprisingly really good, the style of the object is really close to the art objects made by Harry Morgan.

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Final assignment

I have attempted to make a complex cast using a mould of paper and two different kinds of sand/stone/gravel inside and outside of the mould. I laser cut the mould itself to attempt to replicate a shape previously generated in a computer. The first thing I did was to do a series of experiments to see what recipe I should follow.

1 part cement – 0.4 part water
1 part cement – 0.6 part water
1 part cement – 0.67 part water
1 part cement – 0.74 part water
1 part cement – 0.8 part water
1 part cement – 1 part water
1 part cement – 1.2 part water
1 part cement – 1.4 part water

From this I gattered that I should keep the part of water over 0.8:1 maybe even 1:1 if it’s a deep cast. I used a part of our group project as the design for my mould, it is a series of walls subdividing a large space. The model I was going to make is quite hard to cast – it is thin walls in odd angles, so it’s a definite challenge. I started by using the unroll command on the 3D-model in Rhino and laser cut the resulting pieces.


When I started building the mould I realized it would have been impossible to make this thing water tight and so this technique is not only convenient but also may be crucial to the success of this cast.


When I demoulded my cast parts of it started breaking apart in one place. As my group looked back on our design, we decided to redesign the part that broke off to make it less fragile. The largest part of the model still held together better than expected since I knew the walls where almost too thin. The walls became a little wobbly, this is because of deformation that has occurred as the mould was being filled. It would probably be better to use a little sturdier paper, maybe even a 1 mm cardboard instead for this kind of mould.


Final Project— Multimaterial/ Pinching and Smocking










We choose to work with flexible formwork with multi-material/ smocking and pinching.

Our intent was to create a repetition: one shape multiplied and then connected (smocking) with another material: multi-material. This could be applied as modals in an architectural context.

During the process six square shapes was casted in flexible plastic. Each square was attached to the next with a clamp. It could for example be a wall that is joined to another wall by pinching, where another material (multi-material) make the ”clamp effect” itself. The center of the clamp effect could be where another material makes out a joint. For example a rope, a screw, a bolt or a chain.

As a final conclusion it could be assumed this form in a bigger scale would allow the material being pinched to even better. Now it is fragile and the clamps almost erased what they are suppose to pinch.

Hanna-Thea Björö, Bisera Örn

Tests for assignment #06

I did a test with the technic  “prepacked aggregate concrete“.

First I build a little box which I divided in 25 parts with paper walls. I filled the little “rooms” as in the diagram below. When every “room” was filled with either sand or aggregate I carefully took out the paper walls and poured in the slurry. (1kg cement, 1,2 kg water). I hope the “slurry” will come down through the aggregate.

The result wasn’t so good. I think it depends on the fluidity of the slurry.