Wagner Turbidimeter: A Guide to the Wagner Turbidimeter Method Test
The Wagner Turbidimeter measures the fineness of the cement component in Portland cement by measuring the surface area. A constant light source passes through a cement suspension and is detected by a photoelectric cell. Values are correlated to particle size distribution of 50, 45, 40, 35, 30, 25, 20, 15, 10 and 7.5 micrometers. Turbidity changes as the particle size distribution settle from suspension. Turbidity is related to surface area as per ASTM and AASHTO methods.
Includes photoelectric cell, light, heat absorbing device, light filter, shield, sedimentation tank in metal cabinet with wall mounts and adjustable shelf. Timing burette with stand, microammeter, stirring apparatus, wet sieving assembly with No. 325 sieve, flasks, test tubes and instruction book. 6V storage battery or other constant emf source required but not included. NIST Portland Cement standard reference material for calibration available separately.
Electrical: 115V/60Hz
Meets Test Methods: AASHTO T98 ASTM C 115
The Wagner Turbidimeter is a rugged and reliable instrument to measure the fineness of Portland cement. With its modern technology and precise measurements it will measure the surface area of the cement with accuracy.
Has a constant light source, the Wagner Turbidimeter passes the light through a cement suspension and is detected by a photoelectric cell. This technology will give you values of particle sizes at various micrometer levels from 50 to 7.5 micrometers.
Turbidity changes as the particles in the cement settle from suspension is directly related to surface area. The computed surface area is calculated as per ASTM and AASHTO methods so you get consistent reliable results every time.
The Wagner Turbidimeter method comes with all the necessary accessories to test accurately. A photoelectric cell, light source, heat absorbing device, light filter, shield and sedimentation tank all in a metal cabinet with wall mounts and adjustable shelf.
To test accurately the Turbidimeter also comes with a timing burette with stand, microammeter, stirring apparatus, wet sieving assembly with No. 325 sieve, flasks, test tubes and instruction book. But a 6V storage battery or constant emf source is required and not included.
The Wagner Turbidimeter meets AASHTO T98 and ASTM C 115 test methods. Meets highest standards.
To calibrate order NIST Portland Cement standard reference material separately.
With its features, performance and accessories the Wagner Turbidimeter is the perfect instrument for laboratories and industries that test cement.
Principle of the Turbidimeter Test
The Turbidimeter test is based on the principle of measuring the surface area of portland cement by measuring the changes in the turbidity of a cement suspension. This test method uses a constant light source that passes through the suspension and the scattered light is detected by a photoelectric cell. The heat absorbing device is important to get accurate testing procedure by minimizing the heat effect on the measurement. The stirring apparatus is to mix the cement suspension thoroughly and the sedimentation tank is for the particles to settle. This sieve method is to measure the fineness of portland cement which is one of the important properties that affect the strength of concrete.
Applications
The Turbidimeter test is used in construction industry to measure the fineness of portland cement which is one of the material of construction. This test method ensures that the cement meets the required fineness standards which is necessary to achieve the desired strength of concrete. Also this test method will determine the total specific surface area of the cement which is one of the important properties that affect the performance of the cement in various applications. The Turbidimeter test is used in construction, civil engineering and materials science to check the quality and performance of cement.
Comparison with other test methods
The Turbidimeter test is a standard test method for measuring the fineness of portland cement and is compared with other test methods like Blaine air permeability test. The Turbidimeter test is more accurate and reliable than other test methods as it uses constant light source and photoelectric cell to measure the changes in the turbidity of the cement suspension. It is also more convenient to use, requires minimal equipment and can be done quickly. But before use please follow the regulatory limits as Turbidimeter test is not suitable for all types of cement. Also calibration and maintenance of the instrument is very important to get accurate results.
