foundry sand

noun

1. silica-based sand mixed with clay, oil, etc, to improve its cohesive strength, used in moulding

Example Sentences

Foundry sand and concrete were later dumped in it, along with wood and toxic wastewater.

From Washington Times

And efforts to reduce consumption are complicated by the fact that many environmentally desirable products and activities depend as heavily on aggregate as environmentally undesirable ones do: solar panels are made from silica and silicon; wind turbines are manufactured with foundry sand; autonomous electric vehicles need roads and highways, too.

From The New Yorker

The powders in its machines’ hoppers are plastics, waxes and foundry sand.

From Economist

Unconsolidated sand is largely used in mixing mortars and cements, for smoothing stones used for architectural and monumental purposes, as foundry sand in making moulds for casting, and many other ways.

From Project Gutenberg

In England, the Bunter sandstones frequently act as valuable reservoirs of underground water; sometimes they are used for building stone or for foundry sand.

From Project Gutenberg