“Now is our chance to recover better, by building more resilient, inclusive & sustainable cities.” António Guterres, Secretary-General of the United Nations.
We are very excited to be back for a new year. This year our brief is focused on Arcology, a term coined by Paolo Soleri which is the combination of Architecture and Ecology. Below is a few links describing the year ahead:
Sustainability first! DS10 looks for novel solutions to sustainability issues in all its forms. We are interested in realistic and efficient buildings that contribute to a more sustainable society. We value digital exploration on the threshold between structure and biophilic ornament, coupled with thorough material testing DS10 believe that architecture should be joyful and that architects should think like makers and act like entrepreneurs. We like physical experiments tested with digital tools, for analysis, formal generation and fabrication.
Meat consumption globally is ever increasing, especially in countries which are experiencing rapid increases in wealth such as India. Despite its population consisting of 337 million vegetarians, 71% of people living in India have a meat based diet. The amount of land required to produce meat is extremely more than the amount required to produce vegetarian food products. If crops are grown in greenhouses they require even less space, as the growing seasons can be extended and environmental factors controlled. This highlights how switching to a greenhouse-grown plant based diet has massive spatial advantages and is an efficient use of land.
There is also a huge incentive from the Indian government to encourage those who work in agriculture to use greenhouses rather than open land to grow their crops to increase reliability of harvest and income. However, the most popular greenhouse covering material in India is polyethylene sheeting, which needs replacing annually. This adds to the enormous amount of plastic waste which ends up in India’s open environment (85% of all plastic waste).
The site is located on the outskirts on Jaipur, Rajasthan, and is situated in existing agricultural land, adjacent to two poly tunnel greenhouses. The craft and paper manufacturing area of Sanganer sits just East of the site, which houses several paper production facilities using local raw materials like hemp and bamboo.
When researching alternatives to polyethylene sheeting, paper was investigated as a cladding material – it is cheap, lightweight, translucent and can be locally manufactured using raw materials such as bamboo fibers to increase its strength. To make the paper more weather-resistant, I sourced shellac resin flakes (a natural resin found on trees in India) and mixed a coating to apply to the paper.
To test the moisture resistance of the shellac coating, water is poured into a pool on the paper and left to soak. The water is not able to penetrate the surface of the paper and the underside of the paper is completely dry. Water runs off the paper without soaking through the sheet.
The coating also bonds to the fibers in the paper which increases its transparency. This is beneficial in the application of a greenhouse covering.
Inflatable origami air beams
Following from the inflatable origami studies for Brief 1 (see previous post), the paper origami modules are combined to create inflated beams for the greenhouse. The video below shows an initial study of the inflation sequence of the beams.
The air beams are modeled up digitally to test their form variations. The bottom right form allows for an increase in depth, creating more varied spaces beneath the beams and more opportunities for longer beam spans.
To test the air beams at a larger scale, I constructed a 1.8m wide model. I then used this to analyse its structural stability, and identify any weaker points in the beam.
The origami beam will arrive to the site pre-folded where it is then inflated, increasing ease of transportation.
The infill beams sit within the main air beams to provide a structure for the facade. These infill beams are constructed using the same method as the larger beams and provide support for the reactive facade system.
Origami hinge balloons (developed during Brief 1) are treated with a black coating and tightly sealed. The black coating allows the balloons to absorb more heat, rapidly expanding the air within the balloon when they are exposed to intense heat from the sun. This test was carried out using the same temperatures in Jaipur during summer months.
The solar balloon is attached to a fin, and acts as a hinge. This will be used as a passive way to open and close the greenhouse facade to control intense over-heating in summer and ventilation.
The greenhouses will be shared by multiple families and will provide each family member with enough food to be self-sufficient. Communal farming is becoming more common in India – growing crops using the same resources and centralising power supplies to increase efficiency. In addition to this, many rural villages in India are forced to be self-sufficient due to a lack of connection to resources. My project will aim to combine these characteristics to create a communal self-sufficient greenhouse village in South Jaipur.
Each greenhouse will have a series of connected homes which open into the greenhouse. These will be constructed from rammed earth – the thermal mass of this material will help to prevent overheating during the summer in Jaipur’s arid climate, whilst retaining heat during winter months. The geometries of these homes relate to the form of the greenhouse, and are constructed from single curvature faces.
Each individual requires 40m2 of greenhouse space to grow enough food to maintain a self -sufficient diet. The above matrix displays the possible greenhouse typologies based on 2 person, 3 person and 4 person homes.
The main aspects of the Corn-Crete House system are the use of space, material efficiency and relationship to site. The way space is shaped influences human behaviour. According to a research paper done by KAYVAN MADANI NEJAD in 2007 the curvilinearity of interior design directly affects the way people feel inside them. It concluded that the more curvilinear a space is the more comfortable, safe, relaxed and friendly it feels. My project builds upon this argument. Research also shows that the concrete industry is a major environment pollutant. Cement is the most damaging ingredient. I am proposing a new system which will be using less concrete & less cement thanks to: 1) corn residues partially replacing aggregate making the structure lighter and more porous 2) casting around inflatables resulting in curvilinear architecture suitable for compression which requires less tensile strength.
Azolla is a minuscule floating plant that forms part of a genus of species of aquatic ferns, also known as Mosquito Fern. It holds the world record in biomass producer – doubling in 2-3 days. The secret behind this plant is itssymbiotic relationship with nitrogen fixing cyanobacterium Anabaena making it a superorganism. The Azolla Provides a microclimate for the cyanobacteria in exchange for nitrate fertiliser. Azolla is the only known case where a symbiotic relationship endures during the fern’s reproductive cycle and is passed on to the next generation. They also have a complimentary photosynthesis, using light from most of the visible spectrum and their growth is accelerated with elevated CO2 and Nitrogen.
Azolla is capable of producingnatural biofertiliser, bioplastics because of its sugar contents and biofuel because of the large amount of lipids. Its growth requirements can accommodate many climates too, allowing it to be classified as a weed in many countries. I was able to study the necessary m2 of growing Azolla to sequester the same amount as my yearly CO2 emissions, resulting in 57% of a football field equivalent of growing Azolla to make me carbon neutral.
Why is this useful? Climate change will inevitably bring more adverse climate conditions that will put many world wide crops at risk and, as a consequence, will affect our lives. A crop that produces biomass at the speed of Azolla provides at advantage in flexibility: a soya bean can take months to grow until ready to be harvested, Azolla can be harvested twice a week. This plant has the potential to be used in the larger agricultural sector and diminish the Greenhouse Gas Emissions of one of the most pollutant sectors.
REAL LIFE ACTION
I contacted the Azolla Research Group at the University of Utrechtand they kindly accepted to give us a tour of their research facilities, providing us with an in-depth insight into the aquatic fern. I also decided to approach the Floating Farm with a proposal of using Azolla in their dairy process. They agreed to explore this and I put them in contact with the research team in the University of Utrecht, who are now cooperating with the dairy farm’s team in decreasing the carbon emissions of the cows on the farm.
The Floating Azolla District consists on a proposed community that emphasises a circular economy with a focus on sustainable agriculture in Rotterdam. It builds on to the existing Floating Farm found in the M4H area. It is formed of three areas:
1) Azolla – Dwellings combining a series of residential units for the increasing number of young entrepreneurs in the RID with three central cores growing stacked trays of Azolla as in vertical farming.
2) The Floating Farm which continues to produce dairy products and a Bamboo growing area to maintain the upkeep of floating platforms and construction of new dwellings. Floating rice paddies are grown in the warmer months in a closely monitored system of permaculture.
3) A production facility which concentrates on research and development into Azolla as well as retrieving the water fern’s byproducts such as bioplastics extracted from the sugars; biofuel, from the lipids; and bamboo plywood lumber for the construction of the expanding Floating District.
Floating Azolla District – Dwellings
This section concentrates on the detail construction of the Azolla-Dwellings. These floating units are designed to be used as a combination of co-housing for entrepreneurs working in the Rotterdam Innovation District, where the Floating Farm is located, and indoor Azolla growing facilities which is then used further along in the masterplan. The growing areas are built on a series of building components that provide support for trays of Azolla to be grown in a vertical farming manner and provide support for the floor plates as well as anchoring for the entire dwelling.
The materials are a combination of local bamboo grown on a series of floating platforms that prevent the cold winter winds from affecting the overall masterplan and pallets sourced from neighbouring industrial facilities. Using the reciprocal building system developed in Brief 1, a series of stacked components are linked to form the vertical farming support for the Azolla. This system is then extended to support the floors for the dwellings.
Similar to an aperture ring on a camera, this mechanism uses the varying tide to automatically collect the Azollafrom the vertical farming trays to then be used throughout the Masterplan. By displacing 2.5% of the area for each tray every tidal change, this mechanism collects 50% of the harvest every 10 days allowing for a continuous growth of Azolla.
The dwellings’ facade is a result of a careful analysis of harmful and beneficial solar radiation. By setting an initial average temperature to monitory, the facade will block sun that naturally would drive the temperature above the chosen one and the beneficial would bring the temperature up. This shading serves a buffer zone that surrounds the internal living spaces and is used to grow vegetables for the residents.
Semi-public spaces are located on the ground floor (open plan kitchen and living) and bedrooms are located on the first floor, surround a central spiral staircase for circulation.
The same building system based on reciprocal structures is coated in azolla bioplastic preventing the wood from rotting and making the form waterproof. These are used as underwater columns which allow the dwellings and platforms to float. Each ‘column’ can support a load of 2011Kg.
Based on relationship between the University of Utrecht and the Floating Farm taking place outside the initially academic intention of the visit, I decided to use the Floating Farm as a site and a starting point for my proposal. The floating farm is intended to stand out and create an awareness of the possibility or idea of living on water and taking ownership of one’s food production, which seems to match the potential uses and benefits of Azolla. The researchers at the University of Utrecht expressed their need of getting the advantages of this plant to a wider public and this remained in my mind, possibly being the main reason behind my approach to the Floating Farm.
The Floating Farm sits in the Merwehaven area or M4H in the Port of Rotterdam. Highlighted below are the natural site conditions that determined the placement of the masterplan parts according to their function. Bamboo growing pods are placed southwards of the port to block the winter wind while allowing the summer winds from the west to navigate through.
In 2007, Rotterdam announced its ambition to become 100% climate-proof by 2025 despite having 80% of its land underwater, therefore it was important to look at the flood risk and tidal change. The Merwehaven area in Rotterdam seems to have an average tidal change of 2 metres which I thought could be taken advantage of in a mechanical system mentioned previously.
BUILDING SYSTEM & MATERIAL RESEARCH
The reciprocal building system used in the construction of the dwellings began by looking into the Fern plant and its’ form. All ferns are Pinnate – central axis and smaller side branches – considered a primitive condition. The veins never coalesce and are known to be ‘free’. The leaves that are broadly ovate or triangular tend to be born at right angles to the sunlight.
I then decided to model a leaf digitally, attempting to simulate the fractal nature found in a fern frond and the leaves to 3 degrees of fractals. I then simplified the fern frond to 2 levels to allow for easier laser cutting and structural stability. The large perimeter meant, therefore, there was a large amount of surface area for friction so I explored different configurations and tested their intersections.
I then selected the fern frond intersection I found to show the best stability out of the tested ones shown previously. By arraying them further, they began to curve. When pressure is applied to the top of the arch, the intersections are strengthened and the piece appears to gain structural integrity.
When a full revolution is completed, the components appear to gain their maximum structural integrity. Since I had decided to digitally model the fern frond,I was able to decrease the distance between the individual leaves in the centre of each frond through grasshopper. By doing this, the intersections connecting a frond with another were less tight in the centre than on the extremities of each frond,allowing for double curvature.
I continued to iterate the leave by decreasing any arching on the leaf and finding the minimum component, the smallest possible component in the system. By arraying a component formed of 3 ‘leaves’ on one hand and 2 on the other, I would be able to grow the system in one direction as before due to the reciprocal organisation and in the other direction by staggering the adjacent component. The stress tests of this arrangement showed a phased failure of the ‘column’. Instead of breaking at once, row by row of components failed with time, outwards-inwards.
I extracted the minimum possible component from the previous iterations and attempted to merge the system with firstly, 3d printed PLA bioplastic components and then with an algae bioplastic produced at home. I became interested in the idea of being able to coat the wood in an algae bioplastic substituting the need for any epoxy for waterproofing. The stress tests for this component showed a surprising total of 956 kg-force for it to fail.
Here, I began combining different quantities of vegetable glycerine, agar agar(extracted from red algae and used for cooking) and water. By changing the ratios of agar and glycerine I was able to create 2 different bioplastics: one being brittle and the other flexible. See above for the flexible sample and below for the brittle sample. Both samples appeared to fail under the same 7 Kg-force.
I have designed a time-based construction programme. It begins with a setting out plan where string is used to determine where an industrial hoover (which usually transfers sand) sucks out sand and it is spewed out elsewhere. When my mix has been added to these cone shape voids the hoovering process is repeated but this time a thick layer of the Gum Arabic, Clay and Sand mix. The mixture is then lightly misted with salt water which causes the Gum Arabic to act as the binder. The Desert’s scorching sun then does the rest to solidify the material. Excavation around the land enables a structure which stands upright.
After exploring this method myself I discovered some interesting variations depending on whether I suck the sand first or pour it
I explored these forms digitally.
If you are wondering how I got to this point, well I will jump back to the beginning.
It started in Kew Gardens London, where I chose to study a plant and look into the early stages of bio-mimicry. I chose to study the Lotus Pod (Nelumbo Nucifera) found in Asia.
I wanted to find consistency between the holes of the flowers. Therefore I purchased 40 flower heads and begun experiments to study the arrangement of holes and the parameters within the plant. After experimenting I discovered that flower heads sized between 50-60mm have a gradient like effect where the largest hole is 3.5 times larger than the smallest. I therefore used Frei Ottos sand draining technique to explore what forms can be achieved with the arrangement of holes being that of the Lotus Pod.
After designing and building a smart box I began a matrix study.
I then Explored the parameters of each of these and found out that this sand grain drains at 30 degrees.
From this point I went on to look at how to solidify sand in its current form and that is when I discovered the properties of the Gum Arabic and began to explore. I had began to mix the mixture with sand and clay.
I then explored a site based on where Gum Arabic is produced and where sand and clay is in abundance. Therefore leaving me with Al-Fashir Sudan.
I then Explored the construction techniques using the gravity. Using the terrain as a natural formwork which can be moulded.
I then continued to design a construction process which requires less labour and would achieve high quality design attributes. Which is where I began with the hoovering process.
Gum City provides an opportunity to look into a market which is not meeting its current demand by 30000 tonnes. Through a unique construction process it is possible to create elegant and appealing structures where you would not expect it usually.
A time based construction enables the opportunity to create little pools of water which could later be used to cultivate land and assist with other structures being built. This structure would be used as an irrigation storage unit where equipment for the pivot irrigation are held.
Bananas are the 4th most important crop after rice, wheat and corn. 135 countries grow bananas producing 145 million tonnes per year. The banana industry is worth 52 billion dollars and 400 million people rely on the crop as a staple food or stable source of income. These high figures of production and the aim of producing bananas as cheap as possible for high profits means poor working conditions for workers and a lot of waste. There is a great potential in banana waste i.e. the pseudo-trunk, to be used as an extra source of income by making textiles or using it as a building material.
Banana Plant | Musa
Otherwise known as the pseudo-stem or ‘false trunk’, the trunk of the banana tree is in fact made out of tightly packed leaves. The cells shown in the cross section transport all the nutrients and water from the earth to the rest of the plant. At the moment, the pseudo-trunk is waste product to the banana industry. It is a heavily un-utilised resource that can be used to make textiles or bio-fuel.
Using the pseudo-trunk waste for useful materials
Banana Rope (Manila Rope)
Banana rope has been used historically for things such as ship lines, towing, climbing and landscaping. Manila rope gets its name from the capital of the Philippines, Manila, as a lot of the rope is made there.
The rope is flexible yet non-stretching, durable and resistance to salt water damage. For these reasons its a common choice for ship lines, fishing nets and decorative purposes. It’s used in gyms due to its ability to absorb sweat and therefore act as a good grip.
The Cycas Thouarsii (Madagascar Sago) is a subtropical plant from the Genus: Cycas. Their resistance to hurricanes, wildfires and droughts is part of the reason for their continued survival to the present day. Understanding the structural composition of the plants will help establish what naturally occurring systems allow to the plant to be so durable.
Testing variations of the ‘V’ shaped base inspired by the Cycad will help understand the relationship between a curved profile and strength/durability.
This Investigation shows how different curves perform under gravitational load.
Curve Test: Paper Cantilever I
Curve Test: Paper Cantilever II
The geometries were produced in Grasshopper, utilising the graph mapper for mathematical curves. Since the Cycad plant has a stem in the shape of a Parabola / V, I began by testing how increasing the depth of a parabola curve can increase the performance of the paper cut out.
Curve Test: Plywood Cantilever
The purpose of the experiment was to see if Plywood performs in a similar way to paper when conducting the same tests.
Plywood Array :
The purpose of this experiment is to understand how the curved plywood experiment performs under various arrangements. The base model features arrays with varying angles, and distances apart in order to better understand how the curves can look and connect together.
The second part of this investigation set out to understand how the plywood reacts to varying degrees of tension. String tension members were connected to the cylindrical array in a similar manor to the arrangement found in pine cones.
Plywood : 180 x 360
Utilising the curve of the plywood, investigation was conducted into the various degrees in which the wood can bend.