The Blaine apparatus is used to determine the fineness of cement (and other powdery products) in terms of specific surface in cm2g-1
The digital Automated BlaineGenPLUS model is manufactured according to specifications of the following standards:
In this test, cement is compressed under conditions defined by standard, taking a certain amount of air through the powder compacted.
The resistance to air flow is directly proportional to the fineness of grain, as long as the same testing conditions are respected.
The determination of specific surface serves to control the uniformity of the milling process in the cement plant, but can also be applied to control the particle size of other powder materials. Learn more about the full scope of Blaine Apparatus methods and operational instructions here.
The operation of BLAINEGENPLUS is automatic in as concerns to:
The BLAINEGENPLUS fulfills the requirements of validation demanded to the automatic methods for the determination of the refinement Blaine, and described in standard ASTM C 204-07, chapter 12.
The performance of the BLAINEGENPLUS overcomes in accuracy and precision to the manual method, because the errors in the measurements of time are much lower.
Calibration of the equipment must be done using a cement surface standard reference, as for example the standard reference material NIST 114q.
For optimum results testing should be carried out in a room with controlled temperature.
|Screen||Color LCD 5,7” touch screen|
|Level detectors||Precision photodiodes for detecting upper and lower levels and additional safety level detector. To in-crease accuracy, comprises backlight in red by means of a LED.|
|Time resolution||0.01 s|
|Isolation||Detachable protective screen, made in polycarbonate, with stainless steel frame|
|Temperature resolution||0.1 °C|
|Manometric liquid||Light mineral oil with optimal viscosity. Non-toxic (safety datasheet is comprised)|
|Rise of fluid||Automatic compression pump
Compression avoids the risk of liquid get into the pump
|Predefined testing methods||On-screen wizard to perform the tests, including specific protocols for conducting the test according to EN 196-6 or ASTM C 204.
The wizard calculates automatically the weight of cement to test according to the measured density, desired porosity and verified volume (cement bed) of the Blaine cell.
|Test development||Real time displaying of temperature, constant K, passing time and other parameters|
|Calibration standards||Up to 5 reference cements as standards in each testing methods EN 196-6 or ASTM C 204|
|Cement types||Up to 20 different types of cement can be memorized. (more cements on request)
Independent calculation methods for each cement type
|Blaine cells||Up to 5 Blaine cells can be selected for calculations.
User can change and memorize the cement bed volume of all his Blaine cells
|Test data storage||Up to 1000 complete data test can be memorized in a non-volatile memory.
When 1000 tests are performed, the equipment shows a calibration advice warning.
|PC link||USB 2.0 output. Allows to export the memorized data to a Windows Excel file.|
|Selectable Languages||Spanish, English and French (others on request)|
|Dimensions||270 x 400 x 410 mm (width x depth x height)|
|Power supply||115V / 60 Hz / 1Ph or 230V / 50 Hz / 1 Ph|
|Visual alarms||The computer displays a warning if the temperature measured by the probe is outside the range imposed by the Testing Standard.
The temperature sensor is adjustable to match with an external certified thermometer. (requires pas-sword)
The Blaine apparatus must comply with AASHTO T153 and ASTM C204.
According to IS: 3031 (Part I), 1996, good quality cement must have a fineness value smaller than 10% of the weight of cement particles that are bigger than 90 microns.
For one, Portland cement is among the lowest-cost materials and most widely preferred for use over the past century. This is because the materials used to produce Portland cement including shales, limestone, and various other naturally occurring materials are cheap and widely available. the concrete produced by Portland cement is among the most versatile construction materials in the world.
A common type of cement for general use, Portland cement is the most widely-used basic ingredient in concrete, stucco, mortar, and non-specialty grout all over the world.
Both the automatic and semi-automatic Blaine apparatus versions offer better precision and more accuracy than those offered by the manual iteration of the Blaine apparatus. A cement sample reference like the NIST 114q is used to calibrate the unit. To get the most accurate results possible, the test must be done in an environment with a controlled temperature.
The air-permeability Blaine apparatus is primarily a means to draw a specific amount of air through a ready cement bed with definite porosity. It works by drawing in a specific amount of air through a cement bed with a definitive porosity measurement. The size and number of pores in a pre-set bed with an absolute porosity value. It is a particle size function and determines the airflow rate through the bed. The procedure is outlined as Method A in ASTM C204 and AASHTO T153.
Typically expressed in sq2 /g of surface area, there are 2 kinds of Blaine apparatus testing methods: test methods A and B. Test method A, the reference test method, involves the manual operation of the standard Blaine apparatus. On the other hand, Test method B allows using an automated apparatus that has proven the ability to come up with acceptable performance.
The fluid called MA13 Blaine Air Permeability Manometer is a non-mercury fluid indicator (red spirit) used together with the MA10 Blaine Air Permeability Apparatus to determine the Portland cement fineness. 8 oz or 240 ml bottles are available as refills. Features include its use for testing based on standards set by the ASTM and AASHTo.
A Blaine number is the surface area-based parameter that is quantified with the use of the air permeability method. The technique is well-established in the cement industry. However, it has several widely recognized and important limitations. These include 2 types of cement of the same Blaine number exhibiting different characteristics in terms of performance.
Measuring cement fineness involves filtering the material on standard strainers. This way, you determine the cement proportion where the grain size is bigger than the specified size of the mesh. The cement fineness measurement is expressed as a specific surface. A bigger specific surface means finer cement will be produced.
Determining the Portland cement fineness value involves using the Blaine Air Permeability Apparatus. It measures the particular fine materials' surface area in sq2 cm / g of the test sample. With the use of the apparatus, an amount of air is drawn via a bed with pre-defined porosity.
Measuring the fineness value of Portland cement involves the use of the Blaine Fineness Apparatus. The test is performed according to standards set by the AASHTO and ASTM. The fineness measurement is based on the specific cement area, which is expressed as the total surface area in cm2 / g (square centimeters per gram).
The average Blaine fineness value in modern cement varies anywhere between 3,000 and 5,000 cm2 / g (or 300 – 500 m2/kg). The company says that the vertical roller mills housed in the complex make achieving the maximum disintegration level possible by grinding down the material down to 4,500 - 6,000 Blaine fineness. This ensures the hardening rate and cement strength.
BlaineGen PLUS, Automatic Blaine Apparatus, perfectly meets the standard EN 196-6 and ASTM C 204. This essential, considering, most other systems do not comply with this criteria.
It is also important to note that the specimen dimensions are in accordance with the standard. The operator does not required to use bigger sample sizes than the standard bed of cement.
Accuracy and repeatability combined with exceptional user-friendly interface is what gives the end user the ultimate advantage with the Automatic Blaine system.
Contact us today to learn more!
Contact us today to learn more!