沥青渗透测试

渗透

渗透 testing of bitumen measures the consistency and stability of pure bitumen, 氧化沥青(吹制沥青), 以及乳化沥青的残留物. The test provides an established method for classifying bitumen according to its penetration value. 渗透 values between 40 and 300 have been grouped into five different hardness grades, which are listed in the specifications: AASHTO M 20 and ASTM D946. This test is used to classify the hardness value of bitumen based on penetration value, 这有助于确定, which bitumen to use in various weather conditions for proper road construction. Soft bitumens (higher penetration) are used in cold weather to avoid cracking. In hot weather, a hard bitumen (lower penetration) is used to avoid it getting too soft in the heat.

渗透 value is measured by applying the needle with a load of 100 grams that vertically penetrates into the bitumen for 5 seconds at 25 degrees Celsius. The amount of needle movement is referred to as the penetration value and is measured in tenths of a millimeter. The higher the penetration of the needle in the bitumen, the higher the bitumen grade. Grades of bitumen are designated by two penetration values, for example, 40/50, 60/80, 80/100 etc.; the penetration of an actual sample of the bitumen in any grade should fall between the lower and upper value given.

必需的设备

• Water bath: it contains at least 10 liters of water at a temperature of 25 °C. The sample is immersed in a depth with more than 100 mm from the top. 此外, 有支撑的穿孔架子, 放在上面的样品是哪个, should be above 50mm from the bottom of the bath.
• Sample container: a small cylindrical dish with a flat bottom which its material is metal or glass.
• Transfer dish or Tray: It helps in keeping the container immersed in the water bath.
• 渗透 needle: stainless steel needle which is cylindrical and high polished
• Stopwatch: an automatic timer with an accuracy of 1/10 seconds.
• Thermometer: it shows the temperature in the range of 0-44 °C.
• Penetrometer: the device contains a needle. It is used to release and lock the needle in any position and allows measuring the penetration by applying a load of 100 grams with the least friction. 准确校准是很重要的.

洪堡贯入仪
洪堡’s penetrometers for asphalt binder testing are known for their durability, 精密经济的设计. These penetrometers are used extensively in asphalt binder evaluations, 及其他沥青材料, 水泥, 砂浆, 凡士林油, 蜡, 还有食物, 化妆品及医药产品. Their simple and easy-to-use design, provide years of dependable service in labs around the world.

洪堡 penetrometers come in 3 designs:
H-1200 -通用穿透仪
This unit provides a basic precision penetrometer function with its 5-inch diameter, 千分表, 哪个毕业于400个部门.1mm, corresponding to a 40mm penetration reading. It provides a zero preset for eliminating reading errors. A large variety of penetration needles are available to accommodate any type of penetration testing.

H-1240 -电穿透仪
This unit builds on the basic design by adding an automatic, digital timer. The timer’s release mechanism is switchable between seconds, minutes and hours and accommodates setting to 1/10th of a second intervals. The penetrometer’s plunger is released with a simple button push and automatically stops at the preset time duration.

1240DA -数字穿透仪
This unit incorporates a digital gauge for the penetrometer, as well as an auto, digital timer. The use of a digital timer and gauge provides accurate timing of tests with an auto stop feature, 也很精确, at-a-glance readings during and at the end of the a test.

All three of these 洪堡贯入仪 can accommodate any needle or cone plunger that has a 1-1/8th in. (3mm)直径阀杆. 这三个都是47口径的.5g plunger assembly, two additional 加载 weights (50g and 100g) and a standard 2.5g ASTM D 5针.

洪堡 also has a Portable Penetrometer, which is lighter and smaller than the other penetrometers.

洪堡穿刺针
洪堡 provides a range of penetration needles to fit almost any penetration testing application. For bitumen penetraton testing, 洪堡 provides four models of needles.

沥青材料用针
The H-1280 is a fully hardened and tempered stainless steel needle with a total length of 50mm and an exposed length of 40-45mm. 针径为1.00 - 1.02mm. Needle complies with ASTM D5 and AASHTO T49 Standards.

The H-1290 is a long version of the standard needle with a total length of 60mm and an exposed length of 50-45mm. 针径为1.00 - 1.02mm. Needle complies with ASTM D5 and AASHTO T49 Standards.

洪堡’s H-1300 and H-1302 needles are Certified versions of the two needles above.

洪堡 also offers an array of other penetration needles for various needs, 如:蜡, 电池贴, 脂肪的硬度, 油脂测试, 联合sealents, 还有食物, 浆糊和油漆.

洪堡 also offers various sample containers, moisture boxes and transfer dishes f或使用 in penetration testing.