United States Department of Transportation
i
Develop a new testing and evaluation protocol to assess flexbase performance using strength of soil binder.
-
2008-01-01
[PDF-4.37 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Resource Type:
-
Corporate Publisher:
-
Abstract:This research involved a detailed laboratory study of a new test method for evaluating road base materials based on
the strength of the soil binder. In this test method, small test specimens (5.0in length and 0.75in square cross
section) of binder material are load tested to obtain a flexural strength value. The laboratory study conducted in
this research included material collected from 19 different sources. The results from the study demonstrated that
good correlation can be established between the binder strength and 0-psi Texas Triaxial strength for certain types
of base materials such as crushed limestone and materials treated with cement or flyash. However, the test method
could not be used to measure the flexural strengths of many sand and gravel materials because these materials did
not produce consistent data. The data obtained from repeatability analyses provided an average Coefficient of
Variation (COV) of 12.6% for the base binder flexometer test and a COV of 23.2% for the 0-psi Texas Triaxial
Test. The research effort also included the design and fabrication of a low cost, easy-to-operate prototype test
device for the measurement of binder flexural strength. The reliability of the test equipment was verified by
running parallel tests using another commercially available loading device
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
