Title:
Specific Surface of Aggregates Applied to Mix Proportioning
Author(s):
B. G. Singh
Publication:
Journal Proceedings
Volume:
55
Issue:
2
Appears on pages(s):
893-901
Keywords:
no keywords
DOI:
10.14359/11396
Date:
2/1/1959
Abstract:
Suggested Proportioning Method, applicable to both continuous and gap-graded aggregates, uses specific surface of aggregate as an index of grading. Two charts are offered for use with this method. After selecting the W/C ratio to give a required strength, the first chart is used to choose an aggregate-cement ratio that will give desired consistency at the selected W/C. Froin the second chart a specific surface corresponding to the aggregate-cement ratio is chosen to allow for slightly higher or lower sand content . The Fine and coarse aggregate are combined (as illustrated) to give the required specific surface. Charts are for irregular, 3/4 in. maximum size aggregate, but charts for proportioning with other types and sizes of aggregate may be similarly developed.