Title:
A Program to Test Cements for Variations in Strength Producing Properties
Author(s):
Richard H. Campbell
Publication:
Journal Proceedings
Volume:
65
Issue:
4
Appears on pages(s):
266-275
Keywords:
chemical analysis;compressive strength;cubes;fineness;mortars (materials); portland cements;quality control;testing.
DOI:
10.14359/7471
Date:
4/1/1968
Abstract:
Five brands of cement produced in Southern California were sampled and tested monthly by a ready mixed concrete producer. The compressive strength potential of the cements was checked by using a cube test which used a more realistic cement content and a constant water content of 65 percent. The results of 410 sets of cubes, chemical analysis, and fineness determinations are reported for a 5 year period. A sample of a blended control cement was included each month to check the workmanship of the laboratory conduct-ing the tests. An analysis of the variations in reported strength of the controls revealed a pattern. It was felt that this pattern was caused by environmental influences of the laboratory and contributed to a portion of the variations in the cements being tested.