Laserfiche WebLink
i <br /> California Test 381 <br /> 1978 <br /> PART II. METHOD OF COMPACTION inch t learance between]ower edge of mold and base <br /> A. APPARATUS of mold holder. Clamp in Place, Place 313/16 ::1ch di- <br /> ameter cardboard disc into mold on top of rubber <br /> 1. !Mechanical kneading compactor (California disc. Put mold funnel in place, position the asse:n- <br /> Test 101). bled mold holder on compactor turntable, and lock <br /> 2. Compactor accessories: it on studs. <br /> a. 4-inch Inside Diameter by 5-inch high steel <br /> molds fabricated to an inside surface roughness I <br /> of 250 micro-inches in accordance with the Cen• <br /> eral Electric surface roughness scale Cat. #342 <br /> x 60 (Figure 2). t <br /> b. Compactor mold holder and funnel. <br /> c, 20-inch long feeder trough and spatula. <br /> d. 3151,6-inch diameter by '/e-inch rubber discs. <br /> 3. Basket fabrication equipment (Figure 5-A); <br /> a. Basket making device consisting of a 3%.inch — <br /> diameter cylindrical wooden block and a '/, �„0a2 — <br /> inch masking tape dispenser. <br /> b. 3"/g2-inch diameter Phosphor bronze perforat- <br /> ed exudation pressure discs(Figure 8,Part 111). <br /> 4. Metal basket loading sleeve constructed of 24 <br /> gauge (.023')stainlesssteel#304 in accordance with <br /> Figure 6-:1. <br /> B. MATERIALS 4.49d'Dlta <br /> .1. 3j%vinch diameter cardboard discs composed x•005 <br /> of Royal Jute manila 150 pound substance. <br /> 2. Strips of slotted paper,for making baskets,com- BURR SLIGHTLY-80TH ENDS <br /> posed of 60 pound brown kraft paper,2'/2-inch wide r <br /> by 13%-inch long with slots arranged in accordance <br /> with Figure 3. <br /> 3. '/2-inch width masking tape. <br /> C. CONTROL <br /> Control of the compaction pressure shall be made I5 <br /> in accordance with the instructions for operation and <br /> calibration of the mechanical compactor (California <br /> Test 101). 4 <br /> D. 'OMPACTION PROCEDURE <br /> 1. The following sections, D-2 through D-10, de- I <br /> scribe the normal specimen fabrication procedure <br /> for soils and fine grained aggregates which possess <br /> sufficient natural cohesiveness to maintain the speci- <br /> mens intact during the various test processes. Rela- <br /> tively cohesionless materials,such as aggregate bases, I X45*CFIA1i1 PEi R ON <br /> requir:the use of paper baskets as an aid in handling LIT'SIDE ONLY-BOTH ENDS <br /> the specimens without disturbance.The special fab. <br /> rication procedure, when baskets are employed, is NOTE. 1-:d. rough.. a6tainrd 6y trnooth r,achfrh.p Inslde to <br /> required diameter of 4.O07'µ-aD02 falla.r.d an brat operteon .kh <br /> given in Sections D-11 through D-21.2i. <br /> a boring tool bit ground to VO Palnt rllh sharp petal croLrA fol <br /> 2. Place mold in mold holder that has a rubber disc —.,;-g•001"ra.OW"attafe.Depth of ret b.002"rilh.OIA"feed <br /> 313/r6-inch in diameter and %-inch in thickness cc- Wtv Mphor ba+d all aoolard. <br /> merited to plate. Adiust mold for approximately '/s- FIGURE 2 <br /> b <br />