RFI#012: Cementing Materials

Question: Clause 7.2.2: All concrete used in toboggan construction must be comprised of cementitious materials containing a minimum of 30% Portland cement by mass. Does the 30% portland cement by mass includes the mass of fly ash, silica fume or other cementitious materials? Answer: The quoted clause is being updated in an upcoming rule revision. … Continue reading RFI#012: Cementing Materials