9 building materials made entirely from waste products

No doubt an architectural treasure trove. Image: Cezary p at Wikimedia Commons.

Building with Waste, a new book about, well, you can guess, may not sound like it should top your holiday reading list – but, construction geeks as we are, we found its premise fascinating. Every year, human settlements produce 1.3bn tonnes worth of solid waste products. The book argues that we could and should be putting this to good use as cheap, durable and green building materials. 


Compilers Dirk E. Hebel, Marta H. Wisniewska and Felix Heise looked into the worlds of architecture, construction, and the delightfully named field of "garbology" to find new and exciting materials made out of stuff you'd normally find at a landfill site. Their book argues that, in future, we could end up re-using pretty much everything, as we did back when all waste was organic.

This could come in handy if, as is predicted, our municipal waste output doubles by 2025. As Mitchell Joachim, one of the book's contributors, puts it:

The future city makes no distinction between waste and supply. 

So, from animal blood bricks to nappy roofing, here are our favourite waste-based materials featured in the book. 

1. NewspaperWood

Image: ViJ5.

This design comes froom Norway, where over 1m tonnes of paper and cardboard are recycled every year. The wood is created by rolling up paper and solvent-free glue to create something not dissimilar to a log, then chopping it into usable planks. The wood can then be sealed so it's waterproof and flame-retardant, and used to build anything you would normally build with wood. 

2. Nappy roofing

Image: Lightweight tiles ltd.

Good news: something can be salvaged from all those nappies and sanitary products we throw away, even though they're, well, really gross. Special recycling plants separate out the polymers from the, er, organic waste, and these polymers can then be used to ceate fibre-based construction materials like the tiles in the image above. 

3. Recy blocks

Image: Gert de Mulder. 

These colourful bricks are made from old plastic bags, which are notoriously difficult to recycle in any other way. Recycled bags or plastic packaging are placed in a heat mold, and forced together to form the blocks. They're too lightweight to act as load-bearing walls, but can be used to divide up rooms or outdoor areas. 

4. Blood Brick

Image: Jack Munro.

This idea rests on the assumption that animal blood counts as a waste product. This, we realise, is a potentially offensive idea – but while carnivores are still munching away, they're still wasting loads of animal blood, especially in societies without industrialised food production systems. And, as it turns out, blood is one of the strongest bio-adhesives out there, as it contains high levels of protein. 

British architecture student Jack Munro proposes using freeze-dried blood (which comes as a a powder), mixed with sand to form a paste; this can then be cast as bricks. This could be especially useful in remote communities, where blood from animal slaughter is plentiful, but strong construction materials are thin on the ground.

5. Bottle bricks 

Image: Aaron "tango" Tang via Flickr. 

This proposal is a little different, as it relies on producing a consumer good specifically so it can later be used as a building material. Lots of companies now make bottles in cuboid or other tesselative shapes, to make them easier to transport.

But the practice of doing so to create construction materials actually started with beer company Heineken in the 1960s – Alfred Henry Heineken, owner of the brewery, visited a Carribean island and was dismayed at both lack of shelter, and the number of discarded Heineken bottles scattered everywhere. So the company landed on a new, brick-shaped design for the bottle, shown in the images above. The bottleneck slots into the base of the next bottle, forming an interlocking line. 

6. Smog insulators

Image: New Terrirories/City of Bangkok.

One of our biggest waste receptacles is the air, which isn't great for our lungs, or for the human race's chances of survival on a planet that's rapidly getting hotter. "Dustyrelief", a system created by the City of Bangkok and design firm New-Territories, involves placing an electrically charged metal mesh over a building, which attracts large smog particles and sticks them together. Eventually, this creates a kind of silvery fur over the building's surface. Not particularly attractive, perhaps, but much better than a similar shag forming on the insides of your lungs.

7. Mushroom walls

Image: Evocative designs.

Here, designers figured out a way to grow wall insulator and packing materials using mycelium, a bacteria found in rotting organisms like tree trunks and agricultural byproducts. If placed in a mold, these organic matters grow to the desired shape within a couple of days, and can then be stopped using a hot oven. This is particularly useful because traditional insulating and packing materials tend to be non-biodegradable, or, in the case of asbestos, poisonous.

8. Plasphalt 

The bit on the left is plasphalt, the bit on the right is asphalt. Image: TEWA.

OK, yes, we mostly like this one for its fun name. Plasphalt is made up of grains of plastic produced from unsorted plastic waste, which replaces the sand and gravel traditionally used in asphalt production. In testing, it was found that plasphalt roads were far less vulnerable to wear and tear than traditional asphalt, because the asphalt emulsion bonded better with the plastic than with gravel or sand.

9. Wine cork panels

Image: Yemm & Hart materials.

These wall or floor tiles are made by combining recycled granulated cork with whole wine corks, which you can see as those oblong shapes in the tiles above. This is a pretty useful idea, considering the world apparently consumes around 31.7bn bottles of wine a year. For shame.

 
 
 
 

“Black cabs are not public transport”: on the most baffling press release we’ve seen in some time

An earlier black cab protest: this one was against congestion and pollution. I'm not making this up. Image: Getty.

You know, I sometimes think that trade unions get a raw deal in this country. Reports of industrial action almost always frame it as a matter of workers’ selfishness and public disruption, rather than one of defending vital labour rights; and when London’s tube grinds to a halt, few people will find out what the dispute is actually about before declaring that the drivers should all be replaced by robots at the earliest possible opportunity or, possibly, shot.

We should be a bit more sympathetic towards trade unions, is what I’m saying here: a bit more understanding about the role they played in improving working life for all of us, and the fact that defending their members’ interests is literally their job.

Anyway, all that said, the RMT seems to have gone completely fucking doolally.

TAXI UNION RMT says that the closure of the pivotal Bank Junction to all vehicles (other than buses and bicycles) exposes Transport for London’s (TfL) symptom-focused decision-making and unwillingness to tackle the cause of the problem.

So begins a press release the union put out on Thursday. It’s referring to a plan to place new restrictions on who can pass one of the City of London’s dirtiest and most dangerous junctions, by banning private vehicles from using it.

The junction in question: busy day. Image: Google.

If at first glance the RMT’s words seem reasonable enough, then consider two pieces of information not included in that paragraph:

1) It’s not a TfL scheme, but a City of London Corporation one (essentially, the local council); and

2) The reason for the press release is that, at 5pm on Thursday, hundreds of black cab drivers descended on Bank Junction to create gridlock, in their time-honoured way of whining about something. Blocking major roads for several hours at a time has always struck me as an odd way of trying to win friends and influence people, if I’m frank, but let’s get back to the press release, the next line of which drops a strong hint that something else is going on here:

TfL’s gutlessness in failing to stand-up to multi-national venture capital-backed raiders such as Uber, has left our streets flooded with minicabs.

That suggests that this is another barrage in the black cabs’ ongoing war against competition from Uber. This conflict is odd in its way – it’s not as if there weren’t minicabs offering a low cost alternative to the classic London taxi before Uber came along, but we’ve not had a lengthy PR war against, say, Gants Hill Cars – but it’s at least familiar territory, so it’d be easy, at this point, to assume we know where we are.

Except then it gets really weird.

With buses stuck in gridlock behind haphazardly driven Uber cars – and with the Tube dangerously overcrowded during peak hours – people are turning out of desperation to commuting by bicycle.

Despite its impracticality, there has been an explosion in the number of people commuting by bike. Astonishingly, 30% of road traffic traversing Bank Junction are now cyclists.

Soooo... the only reason anyone might want to cycle is because public transport is now bad because of Uber? Not because it’s fun or healthy or just nicer than being stuck in a metal box for 45 minutes – because of badly driven Ubers something something?

Other things the cabbies will blame Uber for in upcoming press releases: climate change, Brexit, the outbreak of the Franco-Prussian war in July 1870, the fact they couldn’t get tickets for Hamilton.

It is time that TfL refused to licence Uber, which it acknowledges is unlawfully “plying for hire”.

Okay, maybe, we can talk about that.

It is time that black cabs were recognised and supported as a mode of public transport.

...what?

It is time that cuts to the Tube were reversed.

I mean, sure, we can talk about that too, but... can you go back to that last bit, please?

RMT General Secretary, Mick Cash, said:

“RMT agrees with proposals which improve public safety, but it is clear that the driving factor behind the decision is to improve bus journey times under a buckling road network.

“Black cabs are an integral part of the public transport system and as the data shows, one of the safest.”

This is all so very mixed up, it’s hard to know where to begin. Black cabs are not public transport – as lovely as they are, they’re simply too expensive. Even in New York City, where the cabs are much, much cheaper, it’d be silly to class them as public transport. In London, where they’re so over-priced they’re basically the preserve of the rich and those who’ve had enough to drink to mistakenly consider themselves such, it’s just nonsense.

Also – if this decision has been taken for the sake of improving bus journey times, then what’s wrong with that? I haven’t run the numbers, but I’d be amazed if that wasn’t a bigger gain to the city than “improving life for the people who take cabs”. Because – as I may have mentioned – black cabs are not public transport.


Anyway, to sum the RMT’s position up: we should invest in the tube but not the buses, expensive black cabs are public transport but cheaper Ubers are the work of the devil, and the only reason anyone would ever go by bike is because they’ve been left with no choice by all those people in the wrong sort of taxi screwing everything up. Oh, and causing gridlock at peak time is a good way to win friends.

Everyone got that straight?

None of this is to say Uber is perfect – there are many things about it that are terrible, including both the way people have mistaken it for a revolutionary new form of capitalism (as opposed to, say, a minicab firm with an app), and its attitude to workers (ironically, what they could really do with is a union). The way TfL is acting towards the firm is no doubt imperfect too.

But the RMT’s attitude in this press release is just baffling. Of course it has to defends its members interests – taxi drivers just as much as tube drivers. And of course it has to be seen to be doing so, so as to attract new members.

But should it really be trying to do both in the same press release? Because the result is a statement which demands TfL do more for cab drivers, slams it for doing anything for bus users, and casually insults anyone on two wheels in the process.

A union’s job is to look after its members. I’m not sure nonsense like this will achieve anything of the sort.

Jonn Elledge is the editor of CityMetric. He is on Twitter, far too much, as @jonnelledge.

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