RFI#008: Multiple Concretes

Question: Clause 7.2.2 (Revised): All concrete used in toboggan construction must be comprised of at least 30% cementing materials by mass. Cementing materials are any materials having cementing properties or contributing to the formation of silicate compounds. Examples include portland cement, hydraulic cement, fly ash, slag, silica fume, and metakaolin. If we have two concrete … Continue reading RFI#008: Multiple Concretes