ACI 237R-07 SELF-CONSOLIDATING CONCRETE PDF

ACI R Self-Consolidating Concrete (Self-Consolidating Concrete) [ACI] on *FREE* shipping on qualifying offers. ACI. R Self-Consolidating Concrete. Edition: $ / user per year Because SCC is a viable solution to various concrete placement problems. Buy ACI R: SELF-CONSOLIDATING CONCRETE from SAI Global.

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Your opinions and contributions are welcome. Please contact the Editor: 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.

Self-consolidating concrete SCC must have the ability to flow under its own weight, to pass reinforcing bars or other obstacles without segregation, and not segregate during or after casting.

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The following ASTM standard test methods have been developed to address these fresh concrete properties. The slump cone can be either used the same way up or inverted.

A sample of freshly mixed concrete is placed in the cone in one lift without tamping or vibration.

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The mold is lifted and the concrete allowed to spread. After spreading ceases, two orthogonal diameters of the concrete patty are measured.

The slump flow is the average of the two diameters. The slump flow test allows a comparison of the lateral flow and filling potential of different SCC mixtures.

R Self-Consolidating Concrete

A common range of slump flow for SCC is 18 to 30 in. The slump flow test can be used in production to assess the consistency of SCC. According to ACI R, the slump flow should not differ by more than 2 in.

A nonmandatory appendix of ASTM C provides a procedure for a relative measurement of flow rate, viscosity, and stability. The flow rate is determined by measuring the time it takes for the outer edge of the concrete to reach a diameter of 20 in. The flow rate is influenced by the concrete’s viscosity. self-consolidatng

The stability can be observed by visually self-cinsolidating the concrete patty for evidence of segregation. The J-Ring is placed outside the slump cone so that the concrete flows through the legs of the ring when the cone is lifted.

237R-07 Self-Consolidating Concrete

The slump flow with and without the J-Ring is measured. A difference self-consolidatimg less than 1 in. A difference greater than 2 in. The test method is suitable for use in the laboratory and in the field.

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BASF Construction Chemicals In the test method, a sample of freshly mixed concrete is placed in a cylindrical mold without tamping or vibration. After 15 minutes, the mold is separated into three sections representing the top, middle, and bottom of the cylinder. Each section is removed individually and the concrete in the top and bottom sections washed over a No.

ASTM Test Methods for Self-Consolidating Concrete

The retained aggregate from each section is weighed and the static segregation calculated as the difference between the bottom and top sections divided by the average weight. The test method is a laboratory procedure to determine the potential static segregation. View directory of all issues.