JT/T 533—2020Asphalt pavement fiber oil absorption tester

D.1Experimental instruments and materialsD.1.1Test instrument

The experimental instruments and requirements are as follows:

a） Fiber oil absorption tester: sample sieve, including sieve and sieve bottom, with a sieve mesh of0.5mm;The vibration frequency is240time/min, vibration

width32mm;

b） Electronic Balance: Accuracy0.01g; c） Beaker: Volume greater than200mL, several; d）Oven: Constant temperature adjustable 105℃±5℃、60℃ ±5℃; e） Drying agent: The drying agent is calcium sulfate; f） Collect containers and glass rods;

g）Blender: A four blade cooking machine with a rotating speed of approximately20000r/min~30000r/minThe volume is200mL~300mL.D.1.2Experimental materials

Kerosene.D.2The experimental steps are as follows:

a） In5Take approximately equal amounts of samples from different locations or more1copy5.00g±0.10gFiber samples, taken together2copy;Place the sample in a porcelain tray and105℃±5℃ (polymer fibers are60℃±5Drying in an oven (℃)2hAbove, cool in a dryer; b） Place the beaker on the balance and reset it to zero;Place the dried sample in a beaker and weigh its massmAccurate to0.01g; c） Pour an appropriate amount of kerosene into the beaker until it reaches the top of the fiber2cmThen let it stand still5minabove; d） Gently tap, brush, etc. to clean the sample sieve, weigh the massmAccurate to0.01g;

e） Place the sample sieve above the collection container, gently pour the mixture from the beaker into the sieve, and use kerosene to remove the fibers from the beaker

Rinse thoroughly and carefully pour into the sample sieve;Do not disturb the sample sieve during the operation process;

f）Install the sample sieve (including fibers that absorb kerosene) on the fiber oil absorption tester;Start the measuring instrument, after10minAfter vibration screening

automatic shutdown;

g） Remove the sample sieve, weigh the sample sieve and the fiber mass that has absorbed kerosenem, accurate to0.01g;—

h） For granular wood fibers, the quartering method is used to obtain3copy5.5g±0.1gGranular wood fibers, according to the appendixMChineseM.2.1Hot separately

Extract granulation agent, dry, and cool;Mix the fibers of the granulation agent evenly and take them all at once10.0g±0.1gSample, dispersed by a disperser15s±2;Weigh out5.0g±0.1gFiber sample2 Copy, follow the stepsb）～g）Experiment.D.3Experimental data processing

D.3.1Fiber oil absorption rate according to the formula（D.1）Calculate accurately to0.1 Twice.

O._twom3twom

(D.1)

In the formula:0，——-Fiber oil absorption rate (times);

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