# Sand & gravel: Characteristics

Why desert sand cannot build a skyscraper

Source page: https://www.materialinsights.org/commodities/sand_gravel/characteristics/

What this tab covers The supply and physical characteristics of the commodity. Supply: current production, inventories and stocks, capacity utilisation, geographic and producer concentration, how fast supply responds to price, the project pipeline and capital spending, and logistics and export flows. Material: the physical and chemical properties that set its grade, price and end uses (for example purity and conductivity for metals, API gravity, sulfur and energy content for fuels, moisture, protein and fibre quality for crops).

#### Supply volume characteristics

| Characteristic | Figure | What it means | Source |
|---|---|---|---|
| **Current production volume** | no world total; about 43 billion t of sand and gravel dug a year worldwide (indicative); US 870 Mt (2025e) | USGS reports only US output because other countries report inconsistently. Conway cites 43 Gt a year, the largest material flow of all; Krausmann et al. estimate 28.6 Gt went into buildings and infrastructure in 2010. | USGS MCS 2026; Conway, Material World (2023); Krausmann et al. 2017 |
| **Inventory and stock levels** | not published | Stocks are working stockpiles at pits and at the more than 200 US sales and distribution yards, usually days to weeks of local demand. There are no exchange or strategic stocks; reserves are set by permits, not geology. | USGS MCS 2026 |
| **Capacity utilisation** | not published | US output fell from 967 Mt (2023) to 870 Mt (2025) with no shortage reported nationally, which shows spare pit capacity. Shortages are local, near cities where zoning blocks new pits. | USGS MCS 2026 |
| **Geographic and producer concentration** | very low: no country data; US has 3,400 companies at 6,500 pits; top-10 US states 54% | No HHI can be calculated. The largest US aggregates firm, Vulcan Materials, shipped 226.8 million short tons (about 206 Mt) of sand, gravel and crushed stone in 2025, roughly 9% of US aggregate output (derived). Local markets can still be concentrated where one firm holds the only permitted pits. | USGS MCS 2026; Vulcan Materials 2025 results |
| **Supply elasticity** | short run high from existing pits; long run low near cities because permits are hard to get | Pits can run more shifts quickly. New pits take years of permitting and are being pushed away from population centres, raising haul distances and prices. In India, river-sand bans and environmental clearance under the 2016 Sustainable Sand Mining Management Guidelines limit supply and push buyers to M-sand. | USGS MCS 2026; MoEFCC 2016 guidelines |
| **Project pipeline and CapEx** | manufactured sand is the growth route: about 50% of concrete sand in India (2021); Coal India plans 2.9 million m3 a year from overburden | Indian crusher plants make 25,000-40,000 t a month each. Coal India's subsidiaries run and plan nine plants turning mine overburden into sand. In the US, the federal highway programme authorises $56.8 billion in FY2026, supporting demand. CapEx figures are not published. | Indian Cement Review 2021; Coal India 2023 plan; USGS MCS 2026 |
| **Logistics and export flows** | almost all local: US net import reliance 1%, imports 4 Mt (2025), 90% from Canada | Sand is worth about $14.50/t at the pit, so a 50 km truck haul can double the delivered price. Long-distance trade is mainly marine sand for land reclamation: Singapore reported about 600 Mt of imports in 2000-2020 while exporters reported only 280 Mt, a sign of illegal trade. Dubai imports sand because desert sand is too rounded. | USGS MCS 2026; Conway (2023) |

#### Material characteristics Industrial mineral

Construction sand and gravel is valued for grading, cleanliness and particle shape, not chemistry. Concrete and asphalt need a controlled spread of sizes, little silt or clay, sound particles that do not react with cement alkalis and no salt. Angular manufactured sand and rounded river sand behave differently in a mix, which is why desert sand is mostly unusable.

| Property | Value / specification | Why it matters | Source |
|---|---|---|---|
| **Grading** | fine aggregate in IS 383 grading Zones I-IV; ASTM C33 fineness modulus 2.3-3.1 | Grading sets cement demand, workability and strength of the mix | BIS IS 383:2016; ASTM C33 |
| **Fines (material finer than 75 microns)** | ASTM C33: at most 3% for concrete subject to abrasion, 5% otherwise | Silt and clay raise water demand and weaken the cement bond; washing removes them | ASTM C33 |
| **Particle shape** | angular crushed sand vs rounded river and wind-blown sand | Wind-rounded desert grains do not interlock, so desert sand is too fine and smooth for most concrete | Conway, Material World (2023) |
| **Alkali-silica reactivity** | tested by accelerated mortar bar (ASTM C1260; IS 2386 Part 7) | Reactive silica swells with cement alkalis and cracks concrete years later | ASTM C1260; BIS IS 2386 |
| **Chlorides and sulfates** | limits set by concrete codes; sea sand must be washed | Chloride corrodes rebar; sulfates attack cement paste | BIS IS 456 / IS 383 (indicative) |
| **Bulk density** | about 1.5-1.7 t/m3 loose (indicative) | Sets truck payloads, so haul cost per tonne; Indian M-sand is often sold by cubic metre | indicative engineering value |

## Other sections

- [Summary](https://www.materialinsights.org/commodities/sand_gravel/index.md)
- [Overview](https://www.materialinsights.org/commodities/sand_gravel/overview/index.md)
- [Correlation](https://www.materialinsights.org/commodities/sand_gravel/correlation/index.md)
- [Extraction](https://www.materialinsights.org/commodities/sand_gravel/extraction/index.md)
- [Production](https://www.materialinsights.org/commodities/sand_gravel/production/index.md)
- [Stocks](https://www.materialinsights.org/commodities/sand_gravel/stocks/index.md)
- [Cycles](https://www.materialinsights.org/commodities/sand_gravel/cycles/index.md)
- [Trading](https://www.materialinsights.org/commodities/sand_gravel/trading/index.md)
- [Movement](https://www.materialinsights.org/commodities/sand_gravel/movement/index.md)
- [Criticality](https://www.materialinsights.org/commodities/sand_gravel/criticality/index.md)
- [Emissions](https://www.materialinsights.org/commodities/sand_gravel/emissions/index.md)
- [Relationships](https://www.materialinsights.org/commodities/sand_gravel/links/index.md)