Our Concrete Sand meets every ASTM C33 and C10 specification for all concrete construction uses, and for use in septic system installations where code requires it such as the T & J Panel system. It is the universal favorite for mixing up concrete as well as for filling the cracks between paver blocks and bricks. Red Mortar Sand is considered too fine for this use by most builders, who feel the larger Concrete Sand grains ‘lock up’ against one another better. Others prefer the fine sand, saying it settles in more densely.
Our Concrete Sand is a naturally eroded quartz sand a bit coarser than our Red Mortar Sand. The color is off-white, not as white (nor expensive) as our Extra White Sand. Some people prefer it for beach sand, playgrounds, volleyball courts and sandboxes. It is a very clean, uniform sand, washed and screened multiple times. It makes an excellent beach sand for backyard play areas or for lakeside property right on Lake Norman.
Concrete Sand meeting ASTM C33 specifications has virtually no impurities that could dissolve in water over time (clay or silt) nor any mineral content that could react with water (limestone). It is tested to rule out any coal or lignite content, its abrasion strength and a few other physical tests. Any of these impurities would weaken the concrete mix, especially its ability to withstand freezing and thawing without cracking.