Blaine Air Permeability, Fineness

布莱恩空气,细

The Blaine Fineness method covers the determination of the fineness of hydraulic cement, using the Blaine air-permeability apparatus, in terms of the specific surface expressed as total surface area in square centimeters per gram, 或者平方米每千克, 水泥. Two test methods are given: test method A is the reference test method using the manually operated standard Blaine apparatus, while test method B permits the use of an automated apparatus, which has demonstrated acceptable performance.

The Blaine air-permeability apparatus consists essentially of a means of drawing a definite quantity of air through a prepared bed 水泥 of definite porosity. The Blaine works by drawing a definite quantity of air through of bed 水泥 exhibiting a definitive porosity value. The number and size of the pores in a prepared bed of definite porosity is a function of the size of the particles and determines the rate of airflow through the bed. This procedure is outlined in ASTM C204, Method A and AASHTO T153.

The standard 洪堡 Blaine Air Permeability Apparatus consists of: calibrated U-tube manometer, 磨砂玻璃接头, stainless steel test cell and plunger, rubber aspirator bulb and perforated disc. 包括8盎司(226.8g) bottle of red manometer fluid, 滤纸, wood block for holding test cell during filling and a funnel. Mounted on finished wood panel with rubber-footed base. To perform this test, NIST Portland 水泥 #114q is required by the ASTM standard for calibration.

The Semi-automatic Blaine Apparatus provides more accuracy and precision than provided by the manual Blaine Apparatus. 校准 of this unit is done using a cement sample reference, such as NIST 114q. To obtain the most accurate results, the test should be performed in a temperature controlled environment. Unit inlcudes: the unit with an electric pump and time registration; 滤纸s ( 12.8mm, 1000pk; 填充油 (50ml); Plug; thermometer; brush and funnel.

洪堡 also carries a selection of automated Blaine apparatus. 采用的, 电子布莱恩仪, Dyckerhoff system provides a fully automatic test procedure and evaluation, 配有软件, 对于一个细胞. Once the test material is set inside the chambers, the test procedure is able to measure the values for the user. This device provides quick test preparation, which does not require the operator to determine the weighed quantity, as precise as he would for the standard procedure. 测试准备后, the device can perform the test in full automation, recording all information without need of supervision Measuring cell dia. 41毫米(1.6"). Volume of measuring cell is approximately ca. 75 cm3. Comes complete with digital indicator, 填充油, 带管注射器, 夯, 轮, 41mm 滤纸 (500pcs) and 13mm dust filters (10pcs).

洪堡 provides a wide selection 水泥 and mortar testing equipment. If you have questions or need help selecting equipment, please call us at 1.800.544.7220或使用我们的 问洪堡 form.

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