Rendering sand and cement on decorative concrete columns is a crucial step in achieving a smooth, durable, and aesthetically ...

For a better concrete, mix sand with bacteria and urea A new method explores low energy biological processes. Written by Janet Fang, Contributor Jan. 29, 2014 at 11:55 p.m. PT ...

Don't confuse concrete mix with sand mix or mortar mix. They don't contain the aggregate (stones or gravel) that's necessary to make a pour thicker than about 3/4 in.

Jeff Girard, president of The Concrete Countertop Institute, teaches his students to make an aggregate-based mix and sand-based mix. When making a mix from scratch, contractors will purchase the ...

ASK THE BUILDER | Bagged concrete you can buy at local hardware stores is a fantastic product, but here's a tip to make it work a little harder for you.

There is nothing "eco-friendly" about this alternative. "This clay is first heated to 700°C" That step alone gives the process at least double the carbon footprint of normal concrete, where only ...

But because the biochar makes concrete so much stronger, it may make it possible to shrink the amount of cement in the mix by 10%, which could offset the extra cost of making the biochar.