Automatic Blaine Apparatus: What It Is and What It Can Do for You

  1. Home
  2. Blog
  3. Automatic Blaine Apparatus: What It Is and What It Can Do for You
10 July 2021 | ,
Request Quote

What is an automatic Blaine apparatus? It is one of the tools that are well-utilized in the cement industry. If you are wondering what it is and how it can help your enterprise, then this short guide might prove useful to you.

The different types of standardized fineness tests will also be discussed to a certain degree. This will help to highlight why a Blaine apparatus is beneficial and what other tests you may need to include in your operations and processes.

What Is an Automatic Blaine Apparatus?

An automatic Blaine apparatus is a piece of equipment that is used to measure how fine powdery products are such as cement. The fineness is measured and expressed as total surface area in square centimeters per gram.

It is used for different standard testing methods. Some of the relevant standards include the following:

The Blaine apparatus is used for air permeability tests. It is one of the standardized tests used in this industry. However, it is not a stand-alone method and you will need to perform other tests in tandem with it.

Standardized Tests for Cement Fineness

There are three standard tests used in the cement industry to determine the properties of a specific surface area. They include the following:

  1. Air Permeability Test (includes both Blaine and Nurse methods)
  2. Sieve Method
  3. Sedimentation Test (Wagner turbidimeter method)

Air Permeability Test for Blaine Apparatus

Air Permeability Tests

These tests include both the Blaine and Nurse Methods. We will focus on the Blaine measurement method but remember that there are some similarities between these two types of tests.

The Blaine test was first published by R.L. Blaine in 1943 and its measurement is outlined in ASTM C204. This measurement was adopted by ASTM in 1946. This test, as well as the Nurse method for that matter, measures the airflow rate through a bed of powder particles. In this case, the bed is made up of cement.

Air permeability tests like the Blaine method are based on the Kozeny-Carman approximate theory, also known as the Kozeny equation. This equation is used as a standard for calculating the drop in pressure of fluids that are flowing through a packed bed of solids.

In air permeability tests, the Kozeny constant (or K constant) is used to compute the flow rate of air through a packed bed of cement. The setup requires one side to have atmospheric pressure and a vacuum on the other end.

Remember that it has been determined that the resistance of the cement particles to the flow of air is directly proportional to the fineness of the grain.

Blaine Apparatus Accessories

Here’s a simplified rundown of how this test is performed:

  1. A cement sample is placed on a perforated plate. This is a permeability cell in an air permeability apparatus like the Blaine’s.
  2. A manometer is attached at the top of the permeability cell and then air pressure is applied.
  3. The bottom end of the cell is also connected to the manometer.
  4. The air’s flow rate is then recorded and adjusted according to different test standards. The airflow rate, the difference in air pressure, and other related data are recorded.
  5. The process is repeated until the ratios reach constancy.

As per the recommendations of international standards, cement must have a fineness of 10%. Portland cement fineness is set at 10%. Rapid hardening cement and Portland pozzolana cement, on the other hand, should have a fineness of 5%. The range of fineness according to industry standards, therefore, is anywhere from 5% to 10%.

The fineness of cement tells you how much of the cement that you are producing has coarse and fine particles. It is expected that some types of cement, like rapid hardening ones, have a finer particle compared to other types.

Full Scope of Automatic Blaine Apparatus Accessories

Sieve Method

In the sieve method, a sample of cement is sieved through a standard sieve prescribed by international standards. The fineness of cement is computed using different parameters. One is the weight of the particles that are bigger than 90 microns. Another one is the percentage of the cement particles that are retained.

The rate of hydration is different from one type of cement to the next. A thin layer of water is formed when water is added to the cement. This layer tends to grow bigger as the particles of cement separate.

Smaller cement particles tend to react a lot faster to water compared to larger particles. Some would think that your cement should have all smaller particles. However, this property presents a problem. When cement mixes too fast with water, it leaves little time for mixing, placing, and handling. The types of cement that you manufacture should have a different ratio of particle sizes. The ratios and proportions should differ, depending on the intended use of the cement. For example, some types of cement tend to be quick-drying while others aren’t. Blaine Apparatus Sieve Method

Downsides of the Sieve Method

The sieve method doesn’t reflect the real sizes of cement particles. Note that a lot of cement grains are usually finer than 90 microns. The smaller particles tend to form lumps, which tend to distort the grain size that is being reported.

Sedimentation Test

Sedimentation tests, like the Wagner turbidimeter test, are no longer in use today. We will only discuss this type of test briefly. In this type of test, 1 gram of sample cement is spread out evenly into a tank filled with kerosene.

Light rays are then passed through this mixture. The turbidity of the solution is then recorded at regular intervals.

Benefits and Features of an Automatic Blaine Apparatus

An automatic Blaine apparatus comes with several useful features. It has automatic control and single-touch operation. The measurements it makes are fluid, repeatable, and error-free.

Some models are outfitted with a lockable ball valve. This feature helps maintain a tamper-proof calibration. There are apparatus models that are very accurate up to 200 m/sec timing accuracy.

Another useful feature is its ability to monitor and configure a variety of cement types. You also don’t need to make manual adjustments depending on the EN or ASTM. The Blaine value is automatically calculated. This includes formula corrections depending on temperature changes.

Related to that is the ability of an automatic Blaine apparatus to automatically measure the temperature during each test.

Test Operation

The cement is compressed during the testing operation. The material will be subjected to varying conditions based on the testing standards being applied. It is expected that the cement powder will take in a certain amount of air as it is compacted.

Note that the fineness of the cement grains is directly proportional to their resistance to airflow. It is also assumed that the testing conditions will also remain the same.

Through these tests, operators in cement plants can control and determine a uniform milling process. The results aid in identifying specific surfaces and particle sizes of different powder materials.

Benefits of Automation

With the help of an automatic Blaine apparatus, you can reduce human errors in the testing process. Here are some of the benefits that you can get from this:

  • The automatic storage of all the test results and related data
  • There is no need for manual calculations
  • All adjustments can be made during run time
  • You can immediately see the test results on-screen and make adjustments accordingly
  • Some of the automated tests that can be performed include pass detection between glass tube marks, the timing of the fall, and fluid aspiration
  • Automatic calibrations can be made or programmed as needed
  • Measurements are highly accurate
  • Test operations tend to be more consistent
  • You eliminate errors that are made due to human fatigue
  • Improves response times and calculations are made much better

Note that some Blaine apparatus models have computer-controlled modes, where there is no need for human intervention during the tests. Some also have stand-alone modes where you can observe the tests and make manual adjustments as needed.

BlaineGen Plus

BlaineGen Plus is one of the highly recommended Blaine air permeability apparatus units in the cement industry. It has been manufactured according to the specifications of the following testing standards:

  1. ASTM C 204 – this standard is also known as the Fineness of Hydraulic Cement by Air Permeability Method.
  2. EN196-6 – also known as the tracked changes method for determining cement fineness.

The test methods applied by GlaineGen Plus follow the air permeability test procedures that have been described briefly above.

Automatic Blaine Apparatus for Air Permeability Test

Features and Specs of BlaineGen Plus

BlaineGen Plus comes with a 5.7″ color LCD touch screen. It is also equipped with precision photodiodes which can detect upper and lower level values during tests.

It also comes with a detachable protective screen in a stainless frame. The screen itself is made from highly durable polycarbonate.

The temperature resolution is rated at 0.1 °C and the time resolution is at 0.01 s.

The entire system is packaged with an on-screen wizard that performs all of the tests automatically. All you have to do is to enter the specific protocols for each test as prescribed in the various test standards such as ASTM C 204 and EN 196-6.

The displays that you see on the screen are in real-time. The results and parameters displayed include the verified volume, porosity, passing time, density, and others.

Note that you can save up to 20 different types of cement in the BlaineGen Plus memory. This allows you to program independent calculations for each type of cement.

Why Do We Like BlaineGen Plus?

Here are some of the reasons why we recommend the BlaineGen Plus apparatus:

  • It meets the standards stipulated under ASTM C 204 and EN 196-6.
  • It fulfills all the validation requirements for automatic refinement determination as it is specified in chapter 12 of ASTM C 204-07.
  • The user interface is very user-friendly and the controls are easy to use.
  • The tests that it performs are highly repeatable and very accurate.
  • It does not require larger samples. You just need to use the dimensions specified by current industry standards.
  • It highly reduces the chances of human error.

The BlaineGen Plus apparatus offers automated testing, recording, and reporting. Using an automatic Blaine apparatus reduces human errors from creeping into your test results. It is a more efficient tool for fine-tuning your manufacturing processes. Request a quotation today.

More on this topic

Keep Reading in Blaine Apparatus

See the Blaine Apparatus range
Blaine Apparatus8 Sep 2026Manual, Digital or Automatic Blaine: What Changes in the ResultEvery Blaine apparatus on the market measures the same thing by the same principle, and any of them will produce a fineness number. The question a cement laboratory is really deciding is a different one: how much of the procedure stays in the operator's hands, and what that costs in agreement between people, between shifts and between sites. That is worth working through carefully, because the automation level is the one specification on a Blaine apparatus that changes the shape of the uncertainty rather than the size of it. If you are still looking for what the method measures and why fineness matters, our article on what an automatic Blaine apparatus is and does covers that ground first. Four Places Where the Operator Enters the Result A Blaine...Read the articleCement & Concrete Testing5 Aug 2026Vicat Testing and What Cement Setting Time Really Tells YouVicat setting time is a standardized cement paste measurement used for specification compliance and quality control. It identifies when a paste prepared under defined conditions reaches the initial and final set criteria of the selected method. It does not directly predict concrete haul time, cold joint formation, finishing time or field workability, because those depend on the complete mixture: water content, admixtures, aggregates and temperature. This guide covers what Vicat setting time measures, how the apparatus produces the number, which test conditions make results drift, and what separates a manual instrument from an automatic one. Setting Time Is Not Early Strength Initial and final set describe the stiffening of a standardized cement...Read the articleCement & Concrete Testing18 Dec 2024How Material Testing Drives Success in Endurance RacingEndurance racing is the ultimate test of human ingenuity and mechanical resilience. Events like the 24 Hours of Le Mans or the Nürburgring 24-hour race push vehicles to their limits, requiring them to maintain peak performance under relentless pressure. Unlike other forms of motorsport, endurance racing isn't just about speed—it's a marathon where durability, reliability, and efficiency take center stage. Every component, from the engine to the tires, faces extreme conditions: high temperatures, continuous vibrations, and prolonged mechanical stress. A single failure can mean the difference between victory and defeat, or worse, put at risk safety. This is where material testing is crucial. By comprehensively evaluating the strength, durability, and...Read the articleCement & Concrete Testing29 Nov 2024Most Popular Types of Material Testing EquipmentTo sum upThe field of material testing includes an extensive number of procedures used to evaluate the properties and performance of materials. These procedures range from assessing mechanical characteristics such as tensile strength, hardness, and impact resistance to evaluating thermal properties like conductivity and expansion. Central to these evaluations are material testing tools, which provide the precise measurements necessary to verify that materials are reliable and safe to use. The selection of testing equipment is comprehensive, reflecting the diversity of materials—including metals, polymers, ceramics, and composites—and the specific tests required for each. For instance, metals may undergo tensile, hardness, and fatigue tests, each...Read the articleCement & Concrete Testing27 Aug 2024Why NextGen is Your Best Choice for Material Testing EquipmentIn the field of material testing, finding a reliable partner that provides advanced equipment, consumables, and comprehensive services such as calibration, maintenance, and technical support is extremely important. With a large number of companies specializing in material testing equipment, the challenge lies in determining which one truly offers the best solutions. Often, the answer to this question becomes clear only after experiencing their products and services firsthand. NextGen Material Testing, stands out as a leading company in this competitive industry. We supply our clients with cutting-edge equipment designed for a broad range of testing applications. We make sure that our customers have all the necessary consumables and support to keep...Read the articleCement & Concrete Testing17 Dec 2023Industry Best Cement Testing with Vicat Consistency ApparatusBuilding a towering building requires laying a solid foundation that will support its structure before erecting it. Most of the time, this foundation is constructed with concrete not without the help of vicat apparatus. However, does the type of concrete make a difference? Without a doubt. Imagine the Burj Khalifa, which rises to an amazing height of 828 meters and weighs approximately 450,000 tons. In comparison to the cement used for laying the foundations of our homes and apartment buildings, the cement used in the world's tallest building differs a lot. A concrete foundation used for residential construction would not be able to support the enormous weight of the Burj Khalifa. A strong understanding of concrete quality in such grand...Read the articleCement & Concrete Testing14 Aug 2017Digital Mortar Mixer: Quality Cement Mixing Equipment from NextGenNextGen offers several models of robust and efficient mortar mixers. All models of our cement mortar mixing equipment are high quality machines that meet international standards for mortar preparation and safety. Our product line includes three varieties of mixer: digital, automatic programmable, and fully automatic programmable mixers. Browse our selection below for details on our electric mortar mixers. NG-DigiMix - Digital Mortar Mixer The NG DigiMix is a digital table-mounted concrete mortar mixer featuring planetary mixing action. The included bowl and beater are stainless steel in compliance with EN standards. This machine is optimized for operator safety, automatically stopping when the bowl is not secured in place. It also stops when the...Read the articleCement & Concrete Testing16 Mar 2017New Product Release: High-Pressure AutoclaveAccurate testing of cement and concrete materials is necessary for verifying their durability, safety, and compliance with industry standards. One of the most reliable methods for assessing hydraulic cement quality is through autoclave testing. This process evaluates critical properties such as material expansion and curing behavior, providing key insights into their long-term performance. At NextGen, we understand the challenges faced by professionals in testing these materials. That’s why we are proud to offer our high-pressure autoclave, a cutting-edge solution built to meet ASTM C151 and ASTM C490 standards. With advanced features, robust construction, and exceptional reliability, our autoclave provides everything needed for precise and...Read the articleCement & Concrete Testing24 Feb 2017Top Digital Mortar Mixers for High-Quality TestingThe construction industry is expanding rapidly, with astonishing numbers of buildings being constructed daily worldwide. However, every serious construction project starts with a solid foundation. To guarantee the reliability of a structure, the foundation must be of high-quality, durable materials. This requires producing and testing materials according to specific standards while using advanced equipment. Throughout this blog, we will discuss the top digital mortar mixers from NextGen Material Testing. Our products are designed for precise and efficient cement testing. Let's dive in. The Importance of Digital Mortar Mixers in Cement Testing Everyone involved in construction and material testing should have a comprehensive understanding of the role...Read the article
Related equipment

Machines Behind This Article

BlaineGen Plus – Automatic Blaine ApparatusBlaine ApparatusBlaineGen Plus – Automatic Blaine ApparatusBlaineGen Plus is an automated Blaine apparatus for determining cement fineness by the air permeability method. Built for EN 196-6 and ASTM C204 workflows, it...View productBlaineGen Classic – Digital Blaine ApparatusBlaine ApparatusBlaineGen Classic – Digital Blaine ApparatusBlaineGen Classic is a digital Blaine apparatus for measuring cement, lime, and powder fineness by the air permeability method. It determines specific surface area...View productAutomatic Vicat ApparatusCement & Concrete TestingAutomatic Vicat ApparatusThe Automatic Vicat Apparatus determines cement paste standard consistency and setting time with less operator intervention than a manual frame. It uses automated...View productManual Vicat ApparatusCement & Concrete TestingManual Vicat ApparatusThe Manual Vicat Apparatus is used to determine cement and concrete setting time through controlled penetration of a needle or plunger into a prepared sample. Its...View product
Request Quote