Is it safe to plant vegetables in cement blocks?

Is it safe to plant vegetables in cement blocks?

“So yes, modern day 'cinder' block might have fly ash in it.” ... There aren't any studies to show whether the heavy metals that may be contained in cinder blocks or concrete blocks can leach into the soil. If you are concerned, you could get your soil tested for heavy metals.

Is fly ash still used in concrete blocks?

Fly Ash Concrete Mixes Fly ash can be used as prime material in many cement-based products, such as poured concrete, concrete block, and brick.

How bad is fly ash?

Fly ash particles (a major component of coal ash) can become lodged in the deepest part of your lungs, where they trigger asthma, inflammation and immunological reactions. Studies link these particulates to the four leading causes of death in the U.S.: heart disease, cancer, respiratory diseases and stroke.

Will concrete crack in a fire pit?

Concrete fireplaces and fire pits should be constructed carefully. When exposed directly to high amounts of heat, the moisture trapped inside concrete can expand and cause the concrete to crack and in extreme situations, explode.

Can I put fire glass over lava rock?

To fill the gap between the fire ring and the bottom of the fire pit we recommend using sand or Exotic Glass Base Filler to achieve this result. DO NOT use lava rock, lava pebbles, rocks / pebbles or any other porous material UNDER the fire glass.