The phrase "a small amount of sand" is correct and usable in written English.
You can use it when describing a quantity of sand that is not large, often in contexts related to construction, art, or nature.
Example: "To create the sculpture, the artist needed a small amount of sand mixed with the clay for texture."
Alternatives: "a little sand" or "a tiny bit of sand."
Rubber particles sustain loads and suffer a dramatical shape change when mixtures with a small amount of sand, whereas they play an important role in preventing the buckling of sand particle chains with high sand fraction.
A small amount of sand can initiate pitting on the surface and the new surface is attacked by the reactive gasses or acids.
Put a small amount of sand at the bottom of the can.
On a hard surface, pour out a small amount of sand or table salt.
Put a small amount of sand or glitter in the plastic container as this is what they eat.
If you want to get really creative, you could fill glass or plastic bottles with a small amount of sand, then write the party details on a slip of paper, roll it up and secure with a piece of string.
This shows that the decrease in the oil viscosity increases the settling velocity of the sand grains, and, therefore, a smaller amount of sand flows into the wellbore.
Performance can be furthermore improved by adding a small amount of fine sand, as suggested by many; sand can lead towards better raveling and skid resistance, also improving the maximum flexural strength.
Today your teacher reaches into the pocket of his tunic, where he keeps a small amount of coarse sand, and grips you by the ear, the sand on his fingertips adding abrasion to the enormous pressure he applies, so that your earlobe is not only crushed but also made raw and slightly bloody.
Take 0.3 g tested plant materials leaves treated with different concentrations of copper, chop into a mortar, add 2 mL 10% TCA and a small amount of quartz sand, grind into homogenate and pour into the centrifugal tube, add 6 mL TCA to rinse mortar, put the solution into a centrifuge tube (4000 r/min centrifugal for 10 min), supernatant is extracted as sample.
