In addition to the cement, water, gravel and sand that constitutes nearly all concrete, researchers have experimented with adding recycled fly ash — a material containing heavy metals that are n ...
Many of the concrete mixtures created in the lab include fly ash, a byproduct of coal fired power plants. Fly ash replaces some of the cement — a component of concrete whose production emits ...
more commonly known as "concrete cancer" happens when concrete is not mixed properly and lacks fly ash. Water makes the concrete expand and crack and, in most cases, the only way to fix it is to ...