1028 BROADWAY 2016-01-01 MF Import

i 7 PAVLMEN�f RlCOMNENL`ATIONS � ; Subgrade Prcpar.�fion \1'e reconunend the subgrade soils in ue�� pacemcu� :ue::� Le prrpnred ;ind ev�du:Ucd as desa�ibed in thr . I:;uiDwork" section of this reporl. l4e recommend pt�eing a 12-iuch thick imponeJ gravel horrn�� + subbasc layer below Ihe pavemenl sections describcJ bel . If tlie subgrade soils 8fC CXCCSgIVI'I\' Il1o[c ur suli, i� may bc neccssary to cxc:rvatc localiud arcas�mo olacc thcm with adAitional gravcl bu�ro�+ .a ;�ravcl basc malcrial. 1'avcmcro subgradc conditions s Id hc ohservcd and proul=rollcd durinr , cunslruclion and pnnr to placin�; ihc subbasc malcrials in , cr to cvaluatc Ihe prescucr uf un�uilablc >uh�ride soils and the�ucd fiir overvexcavation and placemem of a geotextil..separ:Uur. � New Hot Mix Asphalt(HMA)Pavement I � In light-dut}'p.n'emenl ;�reas(c.g., aulon�obile parking). wc recomincnd :� pavcmcnt scctian con�is�in� of ai I�ast a 3-inch tLickness of'/•-inch HMA (PG 58-22)per R'SDO'I'Scctions 5•04 and 9-03,ovcr o 4-inch � thickness of'denscly wmpac�ed crusheJ rock buse course per \VSDOT Seclion 9-039(3). In heavy-duty pa��cment arcas (c.g., inick u:lflic arcas, ma(crials dclivciy) around thc building, wc rccommcnJ a p;rvement SCC11011 COIItiI5Ui1�, O�:II Il'8Sl a 4-inch Ihickness of '/:•inch H�1A (PG 58<2) over a 6-inch � Ihickness of densely compncted crushed rock base coutse. 'Ihe hase course should be compacted tu �t , Ieast 95 percent of ihe maximum dry dcnsily (AS7'M D 15571. \Ve recommend that a proof-roll uf ihc � compactcd basc cowsc tm ubservcd by a rcprescntativc tiom our finn prior to paving. Soft or yicldini; , arc:is obscrvcd during prooGrolling may rcquirc ovcr-cxcavation and replaccmcnt with comp.�cird � stn�ctural fill. llie pavement sections recommendeJ ahu�c ;ue based on our cxperience. 'I'I�icker ;ispl�all sectiuns ma� � bc nccdcd bascd mi Ihe aclual subgradc ronditinns. iraliic d;uo ;mJ inicndcd usc. i Portland Cement Concrete Pavement � Purtl�ud ccment concrete (PCC) seclions shuuld Lc considcred tirr lu;�din� d :k apruns. trash dumpsicr arr:�s and whcm other concentraled hcavy IoaJs may occur. Wc rccummcud lli�u these pavcmen�s consist ��f;d Icast G inches of PCC over G inches of crusheJ surlacing base cuurse. A thicker concrete seclion � m:�p bc ncedcd based on the nclual uaffic data. I(Ihe concrelc paocmcnt will h;ive .lu�veicd juiius. �sc � n•commcnd �hat thc concrcic thickncss bc incmased by an amount cyu:il to ihc di:�mc�cr of thc du��cls. fhc b:isc coursc should bc compactcd lu at Icasl 95 perccut �iDD. I \Vc ��<��,�»�n� rcc �a��mc„is inconinratc constniction joints and/or crack cuntrol l�ints spaced nmximum distances of' 17. icet apan, centerto-cenler, in buth the IongiwJinal and trausvcrse directiuns. Crack control join�s may bc crcatcd by placing an inscrt or groovc into thc fresh concrctc surfacc during � tiuitihing,ur by s;nrculling the coua'ele afier it h;is inili�Uy scl-up. \1'e recumutenu lhc dep�h o1'lhe crack control joinls be approxiuuucly ;: Ihe thickness uf the concretr, ar �ihoul 1'G inches Jeep li�r �hc recununended conaete thicAness of 6 inches. We also recommend ihe cr;ick control join:s be se�led �vi�h � an appropriatc scalant tu hclp reslrict walcr infihration into thc joints. Asphalt-Treated 8aso � ;3ecause pave:nent; msy bc cotislrucied during the wet sea�uus, cuusidcrdiuu may be given tu covering I ihc :neas tu bc puvcd with asphali-trcated base (ATU) t"or protection. Liglit-dury pavement amas should be surlaced �s ith 3 inches of A'I'l3, and hc:rvy-dury p;rvement arcas sliould be surfaced with 6 inches uf �\'I'13. Prior !o placement uf Ihc fiwd pavcment sections, we tecommend thnl arcas of ATD pavement ituilurc be rcmoved aud the subgrcidc repaired. If A'1'13 is used and is serviccable �ti�hen final p�vemcu�s ------ ------ --— — --- ------ -------- ------ � FJ:,41, Sd7p i�n"-0�� YOgP 1 7 � + �, _�, ` GEOEHGINEkR� � y��