Document zzxXe9p7BRLY2ggj9kgVY422m

i- & LIA24441 Pina 1 and and Eng. & Purch. LEAD INDUSTRIES ASSOCIATION 292 MADISON AVENUE NEW YORK IT. N. V. January 33, 19^1 SUBJECT: LEAD GLAZED LIGmEIGHT BLOCK To Members of the Lead Industries Association: Attached is a reprint from "Brick and Clay Record," December i960, on the recently developed lightweight struc tural blocks finished with a lead glaze. This article is reprinted frco "Lead," Volume Zh, Humber Che, I960, published by the Lead Industries Association. We have a limited number of additional copies which are available to members free of charge as long as our supply lasts. Very truly yours. RLZ-.JRH Att. Secretary o i i--iw i wtm P.J "IT l.vew J I1*-  Wjy- m. ! - !. i ..WICH wcwnmnMM LIA2A442 < ......... -- 1 - --------------------- ---------- ... .--W Mi nm.n.-M..... -- -n . ... m c r Distributed I,' LEAD ISDtSTKIF.S ASSOC., 292 IIndium Are., .VTM York 17. t >* i Architectural Breakthrought Permanent Color tor Lightweight Block Frit A Mt frit C Wlrtlaq FPt Stai* W#te CMC U Vk Glaze Formulates for CIay-bodt< VermlcalHe look Kmk k. 0.40 1.40 0.70 0.U 0.17 0J0 -- HO Mw tW Ik 0.40 1.40 041 0.1) 0.17 0J0 ota 0J0 tot * Tm fc. 0-40 1.40 OJt 051 0.17 0.M OJt OH t0k * tk I JO 0.77 -- on 0.17 0-tG 0J0 0J0 100m *** FrH A Frit t K.O NsjO co AIjO, hO SiO, -T4 lJ% 1-0% l*J% 4% vo *1% a iA r% s, u% Frit C c,o JJ% M^> 111% AIjO, If4% SiO, ll -j Lightweight structural block* with |M*rmiM'n| weatherproof color are nn a reality and w iU soon )< an iro- **'- **-*-hitcct'* bag .f |rick*. Developed hy the Zonolite Company, block* arc nixie light hx thr inclusion of up to 12 |f cm! >f rxpamlrd . rrmica'ite in a clay matrix. The produH i*> now in pilot pljt production. Sur-rs*ful pilot proilottion run* have Iwn completed udng concrete Mock machine* and "%oft mud" brick molding machine*. Offer Economic* Mphtwright blocks will offer fiurtihrr of economic* which can roaIcriattv reduce the ctw*l of conMnid* ing a building. IMivrrrd ciW* of the Mock* are anlicijmted to be competitive with roocrrtr block because of significant *v ing* in shipping and handling. The mlwml ilft<) weight means that struc tural *up|Mirtiiig requirements partic ularly for muiliMory buildings. Would le consideraldy kmrr. Ialwr coats rj j <-a site are also njir1l to le lower. ^ \n aldilimil advantage is the trcutrly high insulating quality c these blocks'-with a I'-factnr* of one half that of the dense blocks--which M * ike vo-fst) best lun*(n <w(CrWwt Nru/fcr. h./*F> means lower heat losses from the building. The architectural design potential of the^e Mocks has Item enoncoudy bv the development of color ful, jw-rmancni g***,-*, .\n exhaustive development program was carried out by Zonolitr to find glaze formulations that yield glazes with the de sired textures and colors. Of all the <Mnpo*itim* that were tested, only the lead glazes gave consistently good results. The ability d lead to promote glaze-Midy reactions, coupled with a controllable viscosity and low surface tendon made it prw*ible to formulate glaze* with varying textures--from a rough t a smooth. high gb*a tex ture- -despite the relatively rough tex ture of the fired Mock. Glaze During Firing (dazing ran be accmi|dishrd dur ing the firing of the block--called "single fire" glazing in thr structural <lav industry. Or, the fired Mocks ran he ground to precision dirnenMon*-- the block grinds easily--and "double fire** glazed at a lower tem perature. Three general grades of lightweight bf<M'k car be produced--10-lb.. 20-lb., ami .TO-lb,--drprnding on the per centage of vermiculitc included in the mixture. Standard concrete blocka, on the other hand, wi;b a nominal hhirk size of 8 x 8 x 16 in. weigh sifoul 40 (u 45 Ih. Tie 20 and 30-1K. block tvjx*s have high strength and, la this rr^siu, mat the A.S T.M. *pect first h-ns for c'ass A concrete block i A.S.T.M. C9U 52- lOl)llpdccmpn sim strength over gtost areal. Where lo l'*e lO-lfc Mock The lOdb. bltxA is lower it st<ength ami is iiot designed for struc tural i |<|iIh ilions It will be bleal foe un|ia<led interior walls if* hospitals rhoU. industrial {hntv, eic_ where its |K*rtnanrnt ceramic color will provnlr an eaifv cleaned, colorful finished interior surface without the necessity of so additional finishing i>(trriliuA, Vrrmirulite is a lightweight aggre gate material weighing only 7-lb. pee . c. ft after leing expanded. It t* cifn.}Mli)*lf with clay materials and ran withstand filing temperature* up to 2100 deg. F. Above this tempera ture. the venniculite begins to melt. The Mock manufacturer will be able to expand this material himself and the day matrix can be any raw ma terial that is suitable for structural day products. Hrf>rirxtrd from BRICK < CLAY RECORD* Dfxrmbrr 1060 ** HJU'twiWTH a JJP.IMA m%W - S"iJ*Uin > i i mm 1 N 1701.01