ASTM C232
Full Name
ASTM C232 – Standard Test Method for Bleeding of Concrete
Scope
ASTM C232 encompasses the determination of the relative quantity of mixing water that rises to the surface of freshly placed concrete, a phenomenon known as bleeding. This standard provides two test methods, each differing in the degree of vibration applied to the concrete sample:
- Method A: this method simulates conditions where concrete is not subjected to intermittent vibration after placement. The sample is consolidated by rodding only and tested without further disturbance.
- Method B: this method simulates conditions where concrete is subjected to intermittent vibration after placement. The sample is consolidated by rodding and then subjected to intermittent vibration.
Both methods measure the quantity of bleed water over time, allowing for comparison between different concrete mixes or the evaluation of factors affecting bleeding.
The standard provides a detailed procedure for each method, including:
- Specimen preparation: instructions on mixing, placing, and consolidating the concrete sample.
- Test setup: details on the apparatus and equipment required for the test, including containers, covers, and graduated cylinders.
- Measurement: procedures for collecting and measuring the bleed water at specified intervals.
- Calculations: formulas for determining the bleeding rate and cumulative bleeding.
ASTM C232 is crucial for understanding the bleeding characteristics of concrete, which can influence its properties and performance. Excessive bleeding can lead to reduced strength, increased permeability, and surface defects. By using this standard, engineers and researchers can evaluate the bleeding potential of different concrete mixes and develop strategies to control or minimize bleeding in construction projects.
ASTM C232 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C232 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
bleeding; concrete; bleed water; mixing water; consolidation; vibration; rodding; graduated cylinder; tamping rod