Self consolidating concrete testing equipment
What is being measured is the slump flow and the stiffening behavior of the concrete which can be altered by types of admixture, water content, dosages and temperature.Portable rheometers can be used and installed in forms for added on-site measurements.Concrete conditioning (agitated or not agitated) will impact the test results.New lateral pressures prediction models are being developed (see 2 under references for details ). Concrete Bridge Applications are Expanding Self-Consolidating Concrete for Beams Speeds Biloxi Bay Bridge Construction Implementing SCC Technology in Nebraska—All About Working Together ASTM Test Methods for Self-Consolidating Concrete This material is based upon work supported by the Federal Highway Administration under Cooperative Agreement No. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the Author(s) and do not necessarily reflect the view of the Federal Highway Administration.Mixture Pre-qualification and Quality Control procedures have been determined to ensure adequate performance of proposed mixtures and production batches.
According to ACI 237R-07, the slump flow should not differ by more than 2 in. A nonmandatory appendix of ASTM C1611 provides a procedure for a relative measurement of flow rate, viscosity, and stability.The following ASTM standard test methods have been developed to address these fresh concrete properties.ASTM C1611—Slump Flow of Self-Consolidating Concrete This test is performed in a similar manner and with similar equipment as the conventional slump test—ASTM C143.In precast concrete manufacturing facilities, the use of self-consolidating concrete is known to improve production rates and lower labor.A traditional flow test won’t work due to SCC’s high flowability.ASTM C1621—Passing Ability of Self-Consolidating Concrete by J-Ring This test method provides a procedure to determine the passing ability of concrete by using a J-Ring in combination with the ASTM C1611 slump flow test. ASTM C1610—Static Segregation for Self-Consolidating Concrete Using Column Technique In the test method, a sample of freshly mixed concrete is placed in a cylindrical mold without tamping or vibration.