Admixtures are materials in the shape of powder or fluids which are added to your concrete to present it certain characteristics not obtainable with plain concrete mixes. Admixtures are defined as additions "produced given that the concrete combine is being ready". Their skepticism was reinforced via the Cass Report from https://bobo-shabu-and-grill26036.canariblogs.com/5-simple-statements-about-concrete-reinforced-pier-explained-50582150