FLEXURAL STRESS-STRAIN CHARACTERISTICS OF SASKATCHEWAN SOIL CEMENTS
In an effort to determine whether typical soil cements have relatively similar resilient moduli when designed by the Portland Cement Association method of mix design, and also to develop relationships between short cut laboratory procedures and the time consuming resilient testing techniques, an extensive series of laboratory tests were conducted on a typical selection of Saskatchewan soil cement mixes formed into beams. The testing, which was designed to determine whether limiting tensile stresses to 70 percent of the tensile strength was an appropriate value for preventing fatigue failures in Saskatchewan soil cements, involved compressive and tensile measurements during static and repetitive loading of soil cements at different ages. The tests also helped develop a structural design procedure for soil cement to limit fatigue failure. Six representative soils (gradation, locations and design cement contents are tabulated) were selected. Details are given of the testing and the test results. The results indicate that the resilient moduli of typical soil cements in Saskatchewan have a fairly common range at each flexural strength level. The range is sufficient to affect thickness design for limiting flexural cracking. It was shown that if tensile stresses are limited to 60 percent of the modulus of rupture calculated by conventional elastic theory or 65 percent of modulus of rupture calculated from observed strain, then no flexural fatigue will occur in the soil-cement mixes. The aims of the experiment were realized. Pertinent points noted in the study are listed.
Saskatchewan Department of Highways and Transportation, CanadaSurfacing Branch, 1855 Victoria Avenue
Regina, Saskatchewan S4P 3V5, Canada
- Scott, JLM
- Publication Date: 1974-12
- Features: Appendices; Figures; References; Tables;
- Pagination: 77 p.
- TRT Terms: Accelerated tests; Age; Cracking; Deformation curve; Failure; Fatigue (Physiological condition); Flexural strength; Laboratory tests; Mix design; Modulus of rupture; Repeated loads; Resilience (Materials); Soil cement; Static loads; Structural design; Tension; Thickness
- Uncontrolled Terms: Tensile stress
- Old TRIS Terms: Static loading
- Subject Areas: Geotechnology; Highways;
- Accession Number: 00098653
- Record Type: Publication
- Report/Paper Numbers: No. 23 Tech. Rpt.
- Files: TRIS, ATRI
- Created Date: Sep 10 1975 12:00AM