ASTM D711-89 pdf free.Standard Test Method for No-Pick-Up Time of Traffic Paint.
This test method serves as a control test and should beused only as such.There is no direct correlation between theresults of this test and field applications.The apparatus as shown in Fig. 1 shall consist of a steelcylinder of the shape and dimensions as indicated, fitted withtwo replaceable O-rings and a ramp of shape and dimensions asshown.
The detailed dimensional requirements of the steelcylinder are given in Fig.1.The detailed dimensional requirements of the ramp areshown in Fig.1.The replaceable O-rings shall be made of syntheticrubber or rubber-like material meeting the requirements of HK715 of Specification D 2000.
5.1.2 Test the paints used with drop-in beads without beadsunless otherwise specified or agreed upon between the pur-chaser and the seller.
5.2 Butt the glass plate against the ramp.At regular intervalsremove the wheel from its rest,hold against the rest as astarting point,then free roll the weighted wheel down theinclined ramp and over the paint film with each roll of thewheel over a new wheel path. Position the wheel properly sothat a clean surface of the wheel will come into contact with thepaint film. As many as three passes of the wheel can be madebefore the wheel needs to be cleaned.This can be done with arag saturated with acetone.It is best to set aside the wheel afterwashing until all the solvent has evaporated.
Note the end point for no-pick-up time when no paintadheres to the rubber rings of the test wheel when it is rolledover the paint film. As the end point is approached,roll theweighted wheel over the paint film every 30 s.
Report the time elapsed between application of the paintand the end point as the drying time for no-pick-up of the trafficpaint.
Because of the poor precision of this testmethod, if it is used in a specification, the maximum deviationfrom the maximum no-pick-up time specified should be agreedupon between the purchaser and the seller.ASTM D711 pdf download.