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:i <br /> r._ _TTa . <br /> STATE OF CALIFORNIA—BUSINESS,TRANSPORTATION AND HOv51N�AGENCY .tom.'°• Calilomin T <br /> est 366 <br /> „- January, 1485 <br /> DEPARTMENT OF TRAINS€'Ol?TATIO14 r*� <br /> DIVISION OF FAMITIES CONSTRUCTION <br /> office of Transportailon Laboro`orY <br /> P.O.Box 14128 <br /> Sacramento,CA 45814 <br /> na►r—Il ®F TEST FOR STABILOMETER VALUE <br /> 1'erfors11 all tests at this stage setting. <br /> A. SCOPE b. Adjust the testing ead hones atmachine 50 rate of 0.05 <br /> This test method pro-mles a procedure for deter- 1) The platen <br /> mining the relative stability (5tabilorneter Value) of inch per minute when no load is being <br /> a bituminous mixture by measuring the transmitted <br /> act attest <br /> applied, This adjustment is performed <br /> horizontal pressure developed in a comp with the stabilometer and stage base]es <br /> ressure.-fhis value the platen,if the testing machine app <br /> specimen under a given vertical p Hydraulic <br /> indicates the ability o£the pavement to resist plastic the load from the lower platen. <br /> deformation under the action of traffic. <br /> testing machines must be run se neral <br /> minutes before the oil worms sufficiently <br /> B. APPARATUS to maintain a constant speed. <br /> I. 5tabilometer (Caiifomia) and stage (Figure 1) 2) The spherically seated head is free-acting• <br /> 2. oven,thermostatically controlled to 140' ± S°F• (Such heads must be used for the stabi- <br /> 3. o etnl follower,3.965±0.005'dia. lometer test but are shimmed immobile <br /> 5.5 ±0.25' high, during"pressing"such as in the app <br /> 4900 grams (maximum) tion of static leveling loads.) specimen <br /> ce the standarmet <br /> 4. Standard metal specimen, c' (p ethead to 40'F)in he stabilometer. <br /> 4 0 ±0.055' dia. Seat it firmly on the stage,hold it in place <br /> 5.5 ±0,25" high with either the hand or a confining load of <br /> 5. Rubber bulb(for introducing air into stabilome- lG0 pounds in the testing machine {head <br /> may be free-acting or shimmed),and ap- <br /> ter) with ply a horizontal pressure to exactly 5 psi. <br /> 6. Test grecs,ly50.DDO <br /> sea lbs capacity ctinih`ead Adjust the turns indicator dial to zero. <br /> a spherically seated and free acting Turn the pump handle at an approximate <br /> SYABILOMETER ADjUSTMENY <br /> rate of two turns per second until the <br /> its opera- stabilometer dial reads .0 psi. 5 t turns <br /> 1. Refer to California Test IO2 for details on the indicator dial shall read 2.00 * .05 turns.If <br /> mechanics of the stabilometer including rens dig- <br /> it does not, the air in the cell must be <br /> tion,calibration,and installation of the neoprene adjusted.Remove or add air by means of. <br /> phragm. the valve and the rubber bulb,and repeat <br /> 2, Calibrate the displacement of the stabilometer the displacement measurement after <br /> by the following procedure: a until the proper number <br /> a, Adjust the bronze nut on the stabilometer each air Chang <br /> base (if the base is of the ac� inches of turns is obtained.'Release the horizon- <br /> stagetype) so that the top of the stage is 31/2 es tal pressure, and remove the standard <br /> below the bottom of the upper tapered ring. metal specimen. <br /> �d 1 <br />