Evaluation of Mini Slump Cone Test, MLR-97-01, 2000

(2000) Evaluation of Mini Slump Cone Test, MLR-97-01, 2000. Transportation, Department of

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Abstract

Early stiffening of cement has been noted as contributing to workability problems with concrete placed in the field. Early stiffening, normally attributed to cements whose gypsum is reduced to hemi⋅hydrate or anhydrate because of high finish mill temperatures, is referred to as false setting. Stiffening attributed to uncontrolled reaction of C3A is referred to as flash set. False setting may be overcame by extended mix period, while flash setting is usually more serious and workability is usually diminished with extended mixing. ASTM C 359 has been used to detect early stiffening with mixed results. The mini slump cone test was developed by Construction Technology Laboratories (CTL), Inc., as an alternative method of determining early stiffening. This research examined the mini slump cone test procedure to determine the repeatability of the results obtained from two different testing procedures, effect of w/c ratio, lifting rate of the cone, and accuracy of the test using a standard sample.

Item Type: Departmental Report
Keywords: Slump test, Stiffness tests, Workability, Mini slump cone test
Subjects: Transportation > Pavements
Transportation > Pavements > Concrete
Transportation
Transportation > Materials
ID Code: 19955
Deposited By: Iowa DOT Library
Deposited On: 29 Jun 2015 17:05
Last Modified: 29 Jun 2015 17:05
URI: http://publications.iowa.gov/id/eprint/19955