Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge Elements (2009) / Chapter Skim
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Attachment C - Recommended Standard Test Methods
Attachment C - Recommended Standard Test Methods
Pages 79-88
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From page 79... ...
C-1 A T T A C H M E N T C Recommended Standard Test Methods These proposed test methods are the recommendations of the NCHRP Project 18-12 staff at the University of Sherbrooke. These test methods have not been approved by NCHRP or any AASHTO committee nor formally accepted for the AASHTO Specifications.
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From page 80... ...
C-3 C O N T E N T S C-4 Filling Capacity of Self-Consolidating Concrete Using the Caisson Test C-7 Surface Settlement Test to Evaluate Static Stability of Concrete C-11 Reference
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From page 81... ...
2. REFERENCED DOCUMENTS 2.1 AASHTO Standards • R 39, Making and Curing Concrete Test Specimens in the Laboratory • T 141, Sampling Freshly Mixed Concrete 2.2 ASTM Standards • C 125, Terminology Relating to Concrete and Concrete Aggregates • C 1621, Standard Test Method for Passing Ability of Self-Consolidating Concrete by J-Ring 3.
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From page 82... ...
6.3 Sample Receptacle -- The receptacle shall be a heavy gage metal pan, wheelbarrow, or flat, clean non-absorbent board of sufficient capacity to allow easy remixing of the entire sample with a shovel, trowel, or scoop. 6.4 Tremie Pipe -- The tremie pipe shall have a minimum diameter of 3.94 in.
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From page 83... ...
A repeatability standard deviation of 1.2% was obtained from a study (1) involving five replicate batches of a concrete mixture with a mean filling capacity of 94%.
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From page 84... ...
2. REFERENCED DOCUMENTS 2.1 AASHTO Standards • R 39, Making and Curing Concrete Test Specimens in the Laboratory • T 141, Sampling Freshly Mixed Concrete 2.2 ASTM Standards • C 125, Terminology Relating to Concrete and Concrete Aggregates • D 1785, Specifications for Poly(Vinyl Chloride)
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From page 85... ...
1. C-8 200 mm 50 0 m m 66 0 m m Schedule 40 PVC Pipe Concrete Specimen 300 mm 300 mm 20 mm Dial gage 35 mm screw 150 mm Sealed or Laminated Plywood 4 mm thin acrylic plate 12.5 mm hole 100 mm = 3.94 in Figure 1.
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From page 86... ...
Do not subject the testing surface and the column mold to any vibration or disturbance. 8.2 Remixing of Sample: Remix the sample obtained in accordance with Section 7.1 in the sample receptacle using a shovel or scoop so that the concrete is homogeneous.
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From page 87... ...
Settlement rates of concrete determined at 15, 30, and 60 minutes after the beginning of surface settlement testing can be correlated to the maximum settlement values. The 15-minute rate of settlement can be used to estimate the maximum surface settlement.
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From page 88... ...
H., Khayat, and J., Daczko, "Evaluation of Static Stability of Self-Consolidating Concrete," ACI Materials Journal, Vol.
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