with the cement makes the resulting concrete stronger and saves cement. Finally, adding water to the concrete mix sets off a chemical reaction in the cement that binds these elements together. For the most part, aggregate in modern concrete is carefully chosen to be as chemically inert as possible. The idea is to avoid any unwanted chemistry once this initial reaction concludes, since any additional reactions down the road usually crack or otherwise weaken the concrete.
Keep reading : โรงเรียนบ้านควรพรุพี
Content : โรคไต