Document KJ6Y69xEBGdY3JnprRvjy3Qk6

FILE NAME: Concrete (CONC) DATE: 1949 Nov DOC#: CONC020 DOCUMENT DESCRIPTION: Journal Article - [Silicosis] A New Approach to Pneumoconiosis 1; 5 . r. 2t - *'.' i, ; i : i. i NOVEMBER, 1949 R ock P roducts THE INDUSTRY'S RECOGNIZED AUTHORITY VOL. 52, No. n Bror Nordberg editor This Month We Hear 33 Editorial --Rock Products Industry Has Strong Case for Percentage Depletion 41 Rocky's Notes --Philosophy of the W elfare State 43 Labor Relations Trends 45 the Personal Side of the News 47 Industry News 51 Hints and Helps 54 New Machinery 56 High TefVmoarpruieosrueasitnutyrrepeseesLaarocbfho,furfrarenteaoclrieyms eFadunedrtneparmrcoeicnseadtuiorne sdtiusdciuessseodf b um ability Dr. Bberhard J. Spohn 58 Jet PierFcoifancdgtrui--rlaliiMngdoadrtoaecrknnoawTseapcvrhaoniclieaqsbusleeeonfntoerrjseDt arpdiivlelairnnccignegdRomexcekptheorid mental stages at Kingston Trap Rock Co. quarry W alter 0. Lenhart 60 A New rRAeelpaseptiaorroncashhcaihpt tbMoetawrPqenueeenuttfmeorUomcnaoitvnieoironssitoiysf ifnibdriocsaitsesanaddierleecct trical properties x>f dusts George ffwers 5 4 New Cement Plant For Mexico . C. s. W a tso n 65 Center BKRuoelcrlkne,yerOIhsVlioae,nrdtai'rcseaflooupLreimraneteewdKiuglnnassd-efrirefdorckeidlnsd raatft Wfrhoimte single gas producer, with COa recirculation Bror N ordberg 66 Processing Concrete and Masons Sand 70 Jet-PierqcOuixnaygr-tazMciteeteytlahetnoeMd afoltahfmeweDsr-uiClsleiundrtgistoQCudo.railrqltuzaeiitxretyremely hard W a lte r B. le n h a rt 72 Builds New Crushed Stone Plant N ear Kansas City 75 Versatile Limestone Crushing Plant 76 First RotTtoawrryoy prDoertrafiolrlyrmOdaprnielclresasatpitoeeSndupIonepreCioroartmiSotnmosneearncCdiaog.liqvSeutoasrnartyeisQfaucarry 7 9 Sand and G ravel, Ready-Mixed Concrete Industries Prosper 81 Ohio Meeting of A.I.M.E. H o w a rd A . M eyerh o f! 86 Producing Aggregate From Expanded Clay by SinterlMiignahgrtiwePtetriagohcCteosansgcgrerteegaCteorpp.erphrord. uactinngew30$-23550",c0u0.0ypdl.anotf upsoisnigtioencsonomical process suitable to claL.ysDoafv iadllMcionmsk J 0 5 Brick Company Enters Cinder Block and Concrete SpeciTianhlgtreieaetshnFiegiwehldpcrinesdseurrebloacuktocpllaavnets obfeiRngoaunsoekde-Wforebcsuterr Brick Co. 108 Prestressing Increases The Uses of Precast Structural Concrete l - Coff 110 AutomantHiecawnBsoplonla,ciknW-Mpoaoaldlce&ht,inHveoiberSlatIteinnpdgsusUstrtprieipsPp, reIorn-dct.yu,pchetaiosbnlioncsktalmlead chine for improved production W a lte r B. L e n h a rt NaetdhitaonriaCl . CRoonscukltwanotod W olter B. lenhoArsts. oAcisasoteciEatdeitEorditor D avid Moeine, l . D avid M insk, Associate Editor MJ. . SKe.dSlmacikth, , AAssssiissttaanntt EEddiittoorr Contributing editors Victor J . Azbe Dr. F O . A n d ereg g M. W . Loving Jam es A. Barr, Jr. Home Office M organ K. Cottingham , Ad. Manager H. M. Goodenow, Dir. of Circulation M ary A . W halen, DCiirr.cuolfatRioenseSaerrcvhice I M. S. C. M. HH ea nn cdor cickk, s ,Production Manager | C. P. Teats, Field Representative i District Offices MEasatnearngerA; reJao-h--nRFic.hLarodckYitt., AFusslliestr-, aTnetl., M62u2rrFaiyfthHiAllv2e-.,78N8e8w. York 18, CHeanntnraal ABrelad--g.,R.CPl.evKeelainned, M1a5n, agTeerl,. Main 4362. MreisdewnetasttivAer,ea3--09E.WH. .JaHcikcskoeny,BRlvedp., Chicago 6, Tel. Harrison 7-7890. aWgeesrt,er3n09AWreae--stUJ.acCk.soTnhBaolvnd, .,MCahni cago 6, Tel. Harrison 7-7890. MPaiclilfsic BAldrega.,--SDaunncFarnanScicsoctot 4&, TCeol.., 2G9a7r8fieWldil1sh-7i9re50.BlIvnd.L, oTselA. nDguelneksir6k, 8c-u4r1it5i1e.s IBnldSg.e,atTtleel., WSeansehc.a, 8621735S. e LMo nadnoang,inEgn g lDa nirde--c tHo ra, roMldacFl.eaCnh-aHrluens-. Tterra,fLaltgd.a,rSuSnquLairfee,ofLoCnadnoand,a SB.Wldg.I-.. DC PRODUCTS is published notrtWji CLEAN-HUNTER Publishiim CorpwattP", AW est Jackson Bl*d., Chicapo 6, Illinois; " f ." J . inter, President; E. R. Gaul, V ia L. Frazier, Secretary. Cobyrisht. lsAP. Eider second-class matter, Jan. 30, 1936, at the go, III. post office under the act ffi war' 7 9 . Additional entry at Milwaufcw, w u. . )CK PRODUCTS is indexed regularly W ering Index, Inc. JBSCRIPTION INFORMATION on? bscription Price. United States an|1- J tlS^ihnee nada one year, $2.00; two years, ^ ars, $4.00. Pan American, year, ars, $7.00; three years, $10.00. 11 g t h e r ^ in, one year, $6 00; two ytw * , ars, $15.00. Twenty-nve cents for single ^ dexed in the Industrial Aits Index. ^ nadian subscriptions ami re m ittin g p Canadian funds to ROCK PRODUCT*, r> x 100, Terminal *`A / ' Toronto, Canada. Subscribers-- Date on wrapper. in d ite s th which your subscription expires... ** 0e* have address changed, give old as we Silicosis A New Approach to Pneumoconiosis Research at Marquette University indicates a direct relationship between formation of fibrosis and electrical properties of dusts U EtShEeARMCHarqnuowettebeUinngivcearrsriiteyd Socnhoaotl ionfgMneedwicininesiinghMt iilnwtaouktheee, bWasisic., ims egcivh atunbisemrcuolfospins-eluikmeocdoni isoesias,s tehe asftfreacntigneg, wceorrtkaienrstywpheso obfrmeaitnheeraal idrusltasd.eRn eswuiltths ionfdvuisttarly imntaeyredset vteolotphefroromckthpisrowduocrkts. yeTarhse, bduitsefaosre ahlaosngbetiemn e kintowwans fboer mlieivneedraltso cobnetadinuiengonsliylicoton, danudstswaosf cliasltleodf "msiilniceorasils.d"usInts rkencoewntn ytoearbse tchae ptoabilnecloufdceaususicnhg mthienedriaslesasaeshwasulgfreonwitne sainlidconb,erslointihtea,t twhehicmhordeogennoetraclonnatamine "Ppnneeuummooccoonnioiosissis"is hacshabraecenteriazdeodptebdy. tlhunegsg,roawndth doufstsfibwrohuicsh ticsasuusee iint athree istasidextotenbte, t"hfiebrgorgoewntihc."mDayepimenpdainirg thone ffiucniecntitoenxintegntofto tchaeusleundgesathtodiarecstulyf, owrhicith mpaavyeshtahveewaaywfoearkteunbienrgcueloffseicst, peanseeusm. onia, or other respiratory dis abTo uhtewreh ahtamv eakbeseednu sstse vfeibrarol gethnieco.rAiens oeaf rdlyusbt eplaierfticwleass itrhraittattehde tshhearlupnegdtgiess msuoesst, ibnuvtestthigisatohrass bbeeceanusdeisitcahradsedbeebny iimteproeslsaitbiloenfsohripthbeemtwteoenshtohwe ashnayrpdnefeisns othfe ppaarrtitciclelesedtogescauasned athfeibraobtiiclitryeaocf teixoanmipnlet,hehalsunbgese.n Stielisctoend, caanrbdidies, nfoort fibrogenic. The theoNryewaccTehpeteodriebsy many in vdeussttisgadtiosrssolvtoedasylowholyldsinthtahte filburnoggetniisc sTuheisfltuhiedosr,yfowramsinlegnta sttroexnicgthsoliuntitohne. dbyaytshewfhaecnt tohnalyt insijleiccotisoins swoafscoklnlooiwdnal, stoilriycaainnitmo atlhsewbalsooudsustarlelaymfaotaf l.laHboorwa kevneorw, nthaebosultowpnesuomluobciolintyiostihse, oarnyd ncoewr ftoairnm eedx pteoritme setntthsewthheicohr yh advier ebcetleyn speeemr dtoefginiviteelJyesnuoittstiwuhe.icDheilnicdaitceataenathlyasteist oisf tohfe pbnloeoudmoocfoannioimsisa,ls fworhicihnshtaanvcee,dieddo 'AJJis-Chalmers Mfg. Co.. Milwaukee, Wis. B4 By GEORGE ELVVERS* nnoortmsah]owaminoutnhtes bolofotdheancyhemmoicrealthealen mdiesenatsseoifnththee daunsitms awlsh.ich caused the inaSteoarrcohfinagll fdour stas wcohmicmh onaredefnibormo ganendic,thDerisr. SasilsaosciEatveasnsa, tWMaltaerrquZeetitte, hdairveect foreulnadtioenvsihdiepncbeettwhaeet nthtehree aisbila tiitoynofina tdisussutetoancadusceeratafiinbroetliecctrreicaacl cShpaecraifcictearlilsyt,icist soefemths ethdaut stonclyrysdtuaslsts. warheicfhibreoxgheinbiict. the piezoelectric effect Piezoelectric Effect scrTibheed paiseztoheeleactbriilcityeffoefctcemrtaayinbecrydse atanls , inutnedrec rh apnrgoep e rb ectownedeitnio nms,e ctoh aenfifceactl aamndpleeleoctfricitasl eunseergiys. inA cthoemmeolencterxic bprhaotnioongsraopfha, wneheedrlee tfhoellomwecinhgantihcealrevci otrridcaglroiomvepsulasrees trbaynsfaormcreydstainl.to Telheics wprhoipchertyareis pofoour ndconodnulyctoirns ocfrysetlaelcs tmriectirtiyc,ala--ndthwaht icish, awrehinchonh-caevnetroa-nsyumn- abtaolmansceidn, thoeff-ccreynstetarl. arrangem ent of pieIzfoeolnelcytriccrysetfafelsct whariceh ceaxphaibbliet thoef cseaeumsinloggpicnaelutmo occoonncilousdies,ththaetnthiet wpioeuzlod cealeucstericofeftfhecet fiitbserolfusis ginrowsotmh eowf apyntehue mdeonccoenioobsitsa.inedThseo feaxrpeirnimdiecnattaels tehvait tjhoirsityis otfruien.solSuoblefapr,iezthoeelegcrtreiact mmina ebreaelns fowuhnicdh tohabvee fbibereongetneisct,edandhavnoe mwhinicehralshwavheich sayrme mneotnr-iccaryl stacllriynsetaolsr hQauvaertzb,efeonr perxoavmepnle,tois bae wfeibllr-okgneonwicn. lpoinezgokenleocwtrnicams ianemrainl.erIatl hwahsicahlsocabueseens saimlicoorpsihso. usBuatndfussoedhaqsuanrotz,crywshtiaclhlinies fsitbrruocgteumrec,. hCahsalbceoepnyrsihteowanlsotohbaes bneoenntceosntieods,isa. nIdt ddooeess hnaovte parnodauscyempmneeturimcaol cdruycsttoarl, obfutelietctirsicaitygosood tehnaotugiht dcooens not exhibit the piezoelectric effect. ROCK PRODUCTS Koi 10 40 bLeieknew itsees,te dm, anayn do thmeorstm ignive rea lsreshualvtes twhheicthheworoyu.ld be expected according to whCicehrtadion nmotinhearvaelspiheazvoeelebceternic fporuonpd learbtioersa, toyeryt caanuismeaals.fibArolutimc irneuamctiopnhoisn ppohsastiebleanedxpalsabneasttioosn aorfe theexsaempseleesm. inAg udnisdcerregpoancchieems icisal tchhaatngtehseswehimleininertahles lsutrnugcsturwehicinhto copnievzeorteletchtreiicr cprhyysstiaclasl. vTehsitsighaytepdotihnescisurirsenbteienxgpearcimtiveenltys. in strSuicntcuereinvaonldvedphqyuseicsatilonpsroopfeprhtiyessicoalf mmeantttes,r thhaeveMaarriqsueentteinsctiheensteistesxhpaevrie cinalletdheiinr owuotsrikd.e TexhpeerAtslltios-Cahidalmtheerms pMoarntaunftacrtoulrei,ngrenCdoe. rhinasg palcatyievde aanssiimst aanncde JtahcrokugTh. EW.ilHso.n,BrWowilnli,amdireAcltloisr,, oanthderRmicehmarbdersGroafhiatms ,Enpghiynseiceirsitnsg, aDned valesloopmcoennttriDbiuvtiesdionf.unTdhse caonmdpacneyrthaians sepqeucipiamlleyn t. dDesri.gnHeda r r ya nIdh r icgo, npsthryuscitceadl hchaesmciosnt troifbuthteed GaldovbieceSatenedl aTsusbisetaCnco.e, ognrapXhi-craaynalydisfefsr,acatniodnsciaenndtistsspoefcttrhoe- BUenlilveTreslietyphoonfe MLainbnoerasototariesalsaondhathvee iccoens.tributed technical advice and serv timIte isthedifpfiocsusltibtloe avsasleuses ofuf lltyheaste thexis tpreyr.im eCnetrstation ltyh e itrocskeemp rso dpuocstssibinledutso pblreedoifctcwauhseinnga pmneiunmeroaclowniiollsibs,e wchaipcah mwiilnle,bequvaarlruya,bloertoprtohceesosipnegraptolarnotf ina tdreotlermanidninogthtehre perxotteencttivoef mduesats-ucorens pwyhrioc-hprhoecensseiendgs toof tamkei.nerIanlscaswehseroef ictrycsatnallbienedestetrrumcitnuerde amt awyhabte paoltienrtemd, the cea s epsrotoc ebses the dang miner erous, al su becomes ggesting thoer pporesvsiebnitlityproodf uaclttieorningofthae pdraoncgeesrsoutos idnutsot aor bteonicgonnvoenrte. a Adnandgefirnoaulsly,duasst sthceienbceasidcrawcasuscelosseorf topnuenudmeorsctoannidoisnisg, athned dciusrcaotviveerymoefasbuertetserispmreavdeentamtiovree possible.