Rapid Chloride Test

The RCT and RCTW systems are used to accurately and quickly determine the chloride ion content from powder samples of concrete obtained on-site or in the laboratory using the Profile Grinder or other means. The test results can be used for:

  • Establishing the chloride ion profile for service life estimation
  • Establishing the depth of removal of a chloride ion contaminated surface layer
  • Diagnosing a structure for corrosion activity, in combination with other test systems such the Mini Great Dane, the GalvaPulse, and the Rainbow Indicator
  • Monitoring the chloride ion content during electrochemical removal of chlorides
  • Measuring the chloride ion content of fresh concrete or its constituents



A powder sample of hardened concrete is obtained by drilling or grinding the cover concrete in the structure, or a sample is obtained from the fresh concrete. The sample is mixed with a specific amount of extraction liquid and shaken for five minutes. The extraction liquid is designed to remove disturbing ions, such as sulfide ions, and extract the chloride ions in the sample.

A calibrated electrode is submerged into the solution to determine the amount of chloride ion, which is expressed as a percentage of concrete mass.

Two extraction methods are used:

  • The RCT (Rapid Chloride Test) is used to determine the amount of acid-soluble chlorides (Rapid Chloride Test)
  • The RCTW (Rapid Chloride Test Water) is used to determine the amount of water-soluble chlorides

The two methods use different kinds of extraction liquids. The type of method to use will depend on the specification criteria for maximum allowable chloride ion content in either hardened or fresh concrete. Note that the acid extraction does not remove chemically bound chlorides.


Numerous correlations have been made between RCT test results and chloride ion content determined by standard laboratory potentiometric titration methods such as AASHTO T 260, ASTM C114, DS 423.28, or NS 3671. The following graph shows the results of such correlations made by various laboratories in Scandinavian countries and in the U.S.

Unlock the Power of Concrete Durability with Rapid Chloride Test – Avantech

Welcome to Avantech, your trusted partner in concrete testing solutions. In the world of construction, durability is paramount. Ensuring the longevity and strength of concrete structures is vital for any project. That’s where the Rapid Chloride Test (RCT) from Avantech comes into play. Our state-of-the-art RCT technology provides precise and quick results, enabling you to assess the chloride ion penetration in concrete accurately. Join us as we delve into the significance of the Rapid Chloride Test and discover how Avantech is revolutionizing the industry with our cutting-edge RCT solutions.

Rapid Chloride Test (RCT): Unraveling the Science Behind Concrete Durability

Concrete durability is a critical factor in the construction industry. The ability of concrete structures to resist chloride ion penetration directly impacts their lifespan. Avantech’s Rapid Chloride Test (RCT) is a groundbreaking solution designed to assess chloride ion permeability swiftly and accurately. By measuring the electrical conductivity of concrete samples, RCT provides valuable insights into the concrete’s resistance against chloride ingress.

Why Choose Avantech’s Rapid Chloride Test?

Avantech takes pride in offering cutting-edge technology that revolutionizes the way we test concrete durability. Here’s why our Rapid Chloride Test stands out:

  1. Accuracy: Avantech’s RCT ensures precise results, allowing you to make informed decisions about your concrete mix designs and construction methods.
  2. Speed: With Avantech’s RCT, you can obtain results in a fraction of the time compared to traditional methods, saving you valuable time during your construction projects.
  3. Reliability: Our RCT technology is reliable and consistent, providing you with dependable data for assessing the quality of your concrete structures.
  4. Ease of Use: Avantech’s RCT is designed with user-friendliness in mind. Whether you’re a seasoned professional or a novice, our intuitive interface ensures hassle-free operation.

Where Can Rapid Chloride Test Make a Difference?

Avantech’s Rapid Chloride Test finds applications in a wide array of construction scenarios:

  1. Bridge Construction: Assess the durability of bridge structures and ensure they can withstand harsh environmental conditions, including chloride exposure.
  2. Building Construction: Test the concrete used in building foundations, columns, and slabs to guarantee long-lasting structural integrity.
  3. Marine Structures: Evaluate the resistance of concrete in marine environments, safeguarding structures like docks, piers, and seawalls against chloride-induced corrosion.
  4. Infrastructure Projects: From tunnels to dams, RCT is indispensable for verifying the durability of concrete in large-scale infrastructure projects.

Why Avantech for Your Rapid Chloride Test Requirements?

  1. Expertise: Avantech boasts a team of experienced professionals dedicated to advancing concrete testing technologies, ensuring you receive the highest quality solutions.
  2. Innovation: We continuously invest in research and development to bring you innovative products like the RCT, setting new benchmarks in the industry.
  3. Support: Avantech provides unparalleled customer support, assisting you at every step of the way, from product selection to technical assistance.
  4. Quality Assurance: Our products undergo rigorous quality checks to guarantee their performance, reliability, and durability, giving you peace of mind about your investment.


Avantech’s Rapid Chloride Test (RCT) is not just a test; it’s a gateway to durable, long-lasting concrete structures. By choosing Avantech, you’re investing in the future of construction, where accuracy, speed, and reliability are paramount. Partner with us and experience the difference that cutting-edge technology can make in your projects. Contact us today to explore how our Rapid Chloride Test solutions can transform your construction endeavors.


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