Concrete has quietly become one of the planet’s most voracious consumers of raw material, and ordinary sand is at the heart of that addiction. In 2026, a new line of research suggests a surprising twist: the endless dunes we see in deserts might finally join the construction game – with a radically different recipe that could ease pressure on fragile coasts and riverbeds.
Sand is everywhere, yet we are running short
For decades, sand looked like the one resource we would never need to worry about. It covers around a fifth of the Earth’s land surface. It shapes beaches, deserts and riverbanks. It literally looks infinite.
In building and infrastructure, reality is very different. Construction now consumes about 50 billion tonnes of sand every year. Demand has tripled in around 60 years as cities expand and megaprojects rise across Asia, Africa and the Middle East.
Concrete is the main culprit. Roughly two-thirds of its mass is sand, mixed with gravel, water and cement. Each new tower block, motorway or dam pours more cement-bound sand into the landscape, locking it up for decades.
Concrete’s hunger for sand has turned this seemingly trivial material into a strategic resource with planetary consequences.
Because high-quality sand is finite, extraction has moved from easily accessible quarries to rivers, beaches and even the seabed. That shift comes with a price: eroded coastlines, destroyed habitats and salinised groundwater, alongside the rise of sand mafias in some countries.
Why desert sand was always the wrong kind for concrete
A microscopic shape problem
At first glance, deserts look like an obvious solution. The Sahara alone spreads over nine million square kilometres. Yet for decades engineers largely ignored it.
The reason lies in the shape of the grains. Construction-grade sand usually comes from rivers or crushed rock. Those grains are rough and angular. They interlock like tiny pebbles, giving concrete its internal skeleton.
Desert sand has taken a different journey. Wind has rolled those grains against each other for thousands of years. The result is a collection of almost perfectly rounded, glassy beads.
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Mix that rounded sand with classic cement and you get a slippery mass. The grains slide instead of gripping. The concrete becomes weak and unreliable.
Desert sand is abundant, but its polished grains behave more like ball bearings than building blocks in standard concrete.
This simple mechanical issue explains a major paradox: builders strip beaches in some regions while oceans of sand lie untouched inland.
A new kind of concrete: less cement, more plants
Botanical sandcrete, explained
Researchers from the Norwegian University of Science and Technology and the University of Tokyo think they have found a way through the stalemate. Their prototype material is called “botanical sandcrete”, a hybrid that reimagines what concrete can be.
The approach is bold. Instead of forcing desert sand to behave like conventional sand, the team changed the rest of the recipe. They reduced the role of traditional cement and brought in plant-based binders and finely ground wood.
In the lab, desert sand is mixed with these organic components, then exposed to carefully controlled heat and pressure cycles. Under those conditions, the plant-based binders and wood particles help fuse the grains into a coherent, stone-like material.
- Desert sand provides the bulk of the material.
- Plant-derived binders replace much of the cement.
- Fine wood particles improve bonding and structure.
- Heat and pressure “lock” everything together.
This technique cuts back on the energy-intensive cement clinker process, which normally involves heating limestone and clay to around 1,450°C in giant kilns.
What this new material can actually do
Botanical sandcrete is not a magic one-to-one replacement for the concrete holding up skyscrapers. At least not yet.
Early tests indicate respectable performance for what engineers call non-structural uses. These are elements that do not carry the main weight of a building or bridge, but still shape daily life in cities.
| Potential use | Role in construction |
|---|---|
| Paving slabs | Surfaces for pavements, plazas and courtyards |
| Pedestrian paths | Walkways in parks and residential areas |
| Urban landscaping blocks | Borders, low walls and decorative elements |
| Temporary site structures | Non-load-bearing panels or modules on building sites |
Researchers still need to test how this material behaves over time. Questions include its resistance to frost, long-term moisture, UV radiation and repeated loading from foot traffic or light vehicles.
Botanical sandcrete looks promising for pavements and urban design, not for skyscrapers or motorway bridges – at least for now.
A climate angle too big to ignore
Cement’s heavy carbon bill
Cement production alone accounts for around 8% of global carbon dioxide emissions. That figure includes both the fuel burned to heat kilns and the chemical reaction that releases CO₂ when limestone is converted to clinker.
Every tonne of cement avoided means less CO₂ in the atmosphere. Even partial substitutions matter when billions of tonnes are involved.
Because botanical sandcrete relies more on plant-based binders and uses heat and pressure in a more targeted way, it offers a route to lower-carbon components, especially for urban spaces where ultra-high strength is not necessary.
Relieving pressure on coasts and rivers
There is also a clear ecological bonus. If desert sand becomes a practical feedstock, growth in construction no longer needs to lean so heavily on riverbeds and shoreline dunes.
Those ecosystems are currently paying the price for the global building boom. Removing sand destabilises riverbanks, accelerates coastal erosion and damages breeding grounds for fish and other wildlife.
Moving some of that demand towards inland deserts, under strict regulation, could help rebalance the equation. The key will be avoiding a repeat of the same mistakes: uncontrolled extraction, poorly planned logistics and local communities left out of the decision-making process.
What would large-scale use in deserts look like?
Building where the sand is
If botanical sandcrete or similar technologies mature, one logical step would be to build more directly in or near desert regions. That would reduce transport distances and shipping emissions.
Countries in the Middle East, North Africa and Central Asia could establish local manufacturing hubs, turning a once “useless” resource into an economic asset.
That scenario raises new planning questions: how to secure sustainable biomass for the plant-based binders, how to manage water use in already arid regions, and how to guarantee that benefits reach local populations.
Risks and open questions
Several issues still hang over the concept:
- Biomass sourcing – using wood or other plant materials at scale must not compete with food production or drive deforestation.
- Durability – organic components can degrade; long-term resistance to rot, fungi and insects needs to be proven.
- Recyclability – future demolition waste should be easy to grind and reuse instead of becoming a new headache.
- Cost – botanical sandcrete must compete with conventional concrete on price, not just on green credentials.
In the best scenario, desert-based concretes join a broader toolkit: recycling old concrete, smarter design and stricter control of sand mining.
Key notions behind this shift
From “structural” to “non-structural” uses
Concrete is not all the same. Structural concrete holds up beams, floors and bridges. It must meet strict strength and safety standards because lives depend on it.
Non-structural concrete, on the other hand, includes pavements, decorative elements, garden walls and some prefabricated units. Failure here is inconvenient and costly, but usually not catastrophic. That difference gives researchers room to experiment with new, greener mixes in low-risk applications first.
Why “fine sand” matters
Desert sand is often classed as “fine sand”. The grains are small and smooth, which historically made them unsuitable for standard mixes. The new research basically asks: what if, instead of fighting those characteristics, we design binders and processing steps that work with them?
This logic could spread to other overlooked materials: industrial by-products, crushed demolition waste, or even 3D-printed composites. Each step away from pure cement-and-river-sand concrete slightly loosens the building sector’s grip on fragile landscapes.
For now, botanical sandcrete is a lab-scale promise, not yet a fixture on construction sites. Yet it signals a clear shift: in 2026, deserts are no longer seen only as empty, hostile spaces, but as potential partners in building a lower-impact future – provided science, regulation and local communities move in step.
