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<br />ITEM 330
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<br />~" COLD MIX LIMESTONE ROCK ASPHALT PAVEMEi1T , ~'
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<br />330, 1 Description, This item shall CUiIS1.St Uf :I surface course,, A
<br />a lavelir.g-up course, or a con~t~in:~ti.on ofd Lhese- courses as shown
<br />on plans, .composed of a camP~~cted layer of- nltilrZl lime:,tor.c
<br />root: asphalt, cold mixed with 1 prescribed fl.u>; and shall be
<br />constructed on the comPl~,ted and ,~P}proved base course, cYi~;ri.n~
<br />pavement or floor slab, «1.1. in accordance o:it_h these speciCic~tions
<br />and in conforr.;ity with the liners, ~ra~tes, quantities and typical
<br />crass section show~It on Pl«ns . Thc~ mixture when desitYncd and tested
<br />in accordance ~.~ith these sPecific~~Itions shall have a lahor~ltory
<br />.stability of not Less than 30 per.ccnt unless otherwise sho~•,n on tilc
<br />plans. -
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<br />330.2 t•;aterials. _ ~ _
<br />Roct. As halt. ` f This material shn -. ,, ,, --.~_ .,z:~:: -s., _'= <.< ~~ `
<br />_ p all be composed of natural lime ~.
<br />' stone rock asphalt. This material shall contain not more than ~~~w~~' .~..
<br />1 percent by weight of organic matter (Other than native bitumen), ~.
<br />clays, Loam or pebbles coated therewit}I and shall contain not more
<br />than 5 percent by weight of any one .of or combination of slate,-.--;
<br />shale, shcist, soft particles or other undesirable materials
<br />-.when tested in accordance with Test Method Tex-217-F', ~-
<br />The rock asphalt mixture shall contain ..natural limestone
<br />rick asphalt aggregate with an average bitumen content of 5
<br />to 9 percent by weight of naturally impregnated asphalt as
<br />determined by Test Method Tex-215-F, and shall contain not more
<br />• than 2 percent by weight of any one of or combination of iron
<br />pyrites, or other objectionable matter, as determined by Test '
<br />,.:,tet}~od Tex-217-F,
<br />No aggregate shall contain a total of more than 5 percent
<br />by weight of impurities or objectionah:.e matter listed above.
<br />'The portion of the material
<br />have by weight not more than 8,5
<br />of naturally impregnated asphalt,
<br />passing; the No, 10 sieve saa11
<br />percent not less th,~In 5 Percent
<br />Except for Type D Paving; Mixture, the pOI'tlOI1 of the
<br />material retained on the No. 4 sieve shall contain by weight
<br />from 20 percent to 35 percent of ma teri~~l with a naturally ita-
<br />t~r~~s;nated asphalt content of less than 1 percent. The portion
<br />she material retained on the No. 4 sieve for Type n Paving
<br />:~:i~;ture shall contain by wei~,ht from 15 percept to 35 percent
<br />o_` the material with naturally impre~,nated asphnl.t content of
<br />l~:~s than 1 percent, .This Percentage shall be ad'ustecl within
<br />this ,c,radin~; limits to obtain an acceptable mixtures, -
<br />Uf
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