Characteristics of portland and blended cements: results of a survey of manufacturers

In April 2005, a survey of manufacturers of portland and blended cements in the US and Canada was conducted to collect data on cements produced in 2004. The characteristics of interest include those required to meet specifications ASTM C 150, C 595, and C 1157: physical measurements such as strength and fineness, chemical composition, and performance characteristics such as setting time. This paper summarizes the data collected, comparing and contrasting results on portland and blended cements. Historical data on portland cement characteristics are also presented and trends, or the lack thereof, are noted. Generally, the data indicate that portland cement characteristics are relatively unchanged over the last 10 years.