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IBM California Toil 301 1478 passes tile'/. inch sieve,scalp the sample.sail the /,•:nch sieve. percent Weights for b. if less than 75 percent of the simplo as received ofcarh L;YKJ,Cru:rr es passes the-'/..inch sieve,sculls the sample on tile --------��----size siawle-- I inch stcve. to',." ................ 10(1-89-11 .11 X 1.200= 132 3. Calculations necessary for determining the "as to Na,a"'.....". K9_7a = 15 .15 x 1,200= 1ho used"grading are found in California Test 105. Pimin' No.a.................... 74 .74 x 1_00 = 5ti4 F. THE BATCHING OF UNTREATED MATERIALS IN ___Totrtt�.- _�___ r 1200grarns PREPARATION FOR FABRICATING R-VALUE TEST b. Example with two samples to be combined. SPEOMENS Civon two samples having the gradings and combi- 1. The term "batching" when used in this prose- dation as shown: dure refers to the act of combining, according to ---=------ — _— previously calculated proportions,sufiicie-tit inaterial �~�`r d — Fervent Proportioned in individual samples to fabricate R-valve test speci- u I rrs;nr {T_ul;nC Com- .ts wedmens. sp X bind 2. Separate the passing No.4 material,using a sam- Gmple p rrrnt percent prrrent Per:eut ple splitter, into approximate quantities needed for •41r,r• No.I .1o.2 .tb.I .tat pars;ng pacing each of four specimens. I............. 100 100 So 20 190 3. Recombine the coarse fractions (retained No ;'........ W 190 72 20 42 100 . %. s9 95 C4 19 rs5 90 4) according to the batch weights calculated from No.4...... 70 _ 90 56 18 74 so the "as used"grading. Calculate the percentage of 3/,-inch to%.inch,I/, 4. Weigh out exact amounts of the above passing No.4 portions according to the"as used"grading and inch to No.4 and passing No.4 material and multiply combine with the coarse portions to make Four 1,200- each percentage by the weight of test specimen gram samples. desired (ticte following example). The use of the"increment weight"method,as ii- 5. As each sample is proportioned, immediately Itlstrated on the work card (figure 17),is considered place it into a covered container with an identifca- the preferable method of combining the various size tion ticket. components of materials for the 13-value test.Howey 5• Add to each of the foto batched samples approx- er, they may be combined with equal accuracy by imately 1/z to%the amount of the moisture necessary the method described in California Test 304, to saturate the sample as described later under Sec. The following are examples :rf computations for tion J, (This addition of moisture and the overnight batching by the"increment %weight"method: curing periori below in b are optional if the sample a Example with single sample: meets the standard specification grading require- merits for Class 1 or 2 aggregate base.) Given an aggregate with the following grading: a. Perforin this operation by mixing the material — --- with a hand trowel in a circular pan and at the ;Is used same time rotating the pan horizontally .. t' per:e4,t Ihrss;n4 beneath a fine water spray.Continue mixing for � •...................................................................................... ltkl one minute after the water has been added. No 4.............. T4 b. Record amount of water added,place each sam- ple. . ............................................................................... 7a of loose material in a covered rontainer,and Calculate the percentage of?;-inch to%-inch,'.-inch allow to stand overnight.= to No,4 and passing No.4 material and multiply each Corin n a lan,c rendition over the weekend or over holid{a is R i permissi- percentagi by the total weight of test specimen ble rnr urlrea,rd raateriahs howcrer,cacrcise rare to previa.lose of desired. ruaiilun-frum the contaa,ers. 2