A study shows recycled concrete powders can replace up to 50% of Portland cement in 3D-printed mixes—cutting CO2 emissions by ...

Could so-called ‘hot mixing’, with pockets of reactive lime clasts inside the cured concrete provide self-healing properties? At its core, this is the recipe which any hydraulic cement uses ...

The original Y was made by a thin layer of lime powder and was in need of constant repair. Hoping to make it more permanent, a layer of rock was added in 1907. The next year, 20,000 pounds of sand and ...