too smooth too. Windblown desert sand has smooth grains that won't adhere inside of the concrete mix. Sand grains from water have been slowed down by the water

too smooth too. Windblown desert sand has smooth grains that won't adhere inside of the concrete mix. Sand grains from water have been slowed down by the water when hitting one another, so the grains have jagged parts. At least according to a thing I read about this years ago.