- Author
-
Blaine, R. L.
|
Arni, H. T.
|
DeFore, M. R.
- Title
- Interrelations Between Cement and Concrete Properties. Part 3. Compressive Strengths of Portland Cement Test Mortars and Steam-Cured Mortars. Section 7. Compressive Strength of Test Mortars.
- Coporate
- National Bureau of Standards, Washington, DC
- Report
-
NBS BSS 008,
April 1968,
65 p.
- Keywords
-
cements
|
concretes
|
compressive strength
|
portland cement
|
chemical composition
|
heat of hydration
|
sand
- Identifiers
- fineness; strength gain of portland cement; trace elements
- Abstract
- The relationships between cement characteristics and compressive strength of 1:2.75 (cement to graded Ottawa sand) mortars of standard consistency at ages of 24 hours to 10 years, and made with 199 cements of different types, were studied by fitting multivariable regression equations with the aid of a digital computer. The dominant variables associated with the differences of compressive strength, strength gain, and strength ratios were different at the various test ages, and after different curing conditions. The additional use of certain trace elements with commonly determined independent variables resulted in a significantly better fit between the equations and the observed data. Interactions between the fineness values and other independent variables were noted. Certain parallelisms and differences were noted with respect to variables associated with compressive strength differences at various ages and the heat of hydration of the cements at these ages.