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Gardner Liquid Color Standard (No. 18)
The Gardner Liquid Color Standard No. 18 is a certified color reference used for the visual determination of organic impurities in fine aggregates for concrete, as specified in ASTM C40 and AASHTO T 21 test methods. This standard provides a reliable and consistent benchmark for comparing the color of the supernatant liquid after a sample of fine aggregate has been washed in a sodium hydroxide solution.
These standards serve as a dependable alternative to the Organic Impurities Test Set. Each liquid standard is precisely formulated to match a specific point on the Gardner Color Scale, with No. 18 representing one of the five key colors noted in the test methods for evaluating aggregate quality.
The liquid is hermetically sealed in a high-quality glass tube measuring 0.47 x 4.6 inches (11.9 x 116mm) in diameter and height. Each tube is clearly labeled with its Gardner number and comes packaged in a protective case to ensure its integrity during transport and storage. With a guaranteed shelf life of five years, these standards offer long-term stability and accuracy.
Key Features:
- Accurate Visual Comparison: Provides a precise Gardner Color Scale reference for evaluating test samples.
- Compliance Ready: Specifically designed for use in ASTM C40 and AASHTO T 21 testing of fine aggregates.
- Durable and Stable: Securely sealed in a labeled glass tube with a five-year shelf life.
- Convenient: Available as an individual standard, allowing you to purchase only the specific color needed for your testing procedures.
Specifications:
- Gardner Color No.: 18
- Applicable Standards: ASTM C40, AASHTO T 21
- Product Dimensions: 0.47 x 4.6 in (11.9 x 116 mm) Diameter x Height
- Shelf Life: 5 years
