Analysis on Rice Husk Ash (RHA) have shown that it is a highly effective pozzolanic material, greatly enhancing the strength, durability, and resistance to chemical attacks of concrete [69]. Research conducted b
Learn the best protection in a chemical attack, the number one killer in any NBC attack, the best protection from a biological agent or pandemics including Anthrax, Ebloa, the Zika Virus and the flu. This class will give you practical steps everyone can take to protect themselves and their ...