Document zoKnxQ6gnpJgQbJkBGXqYJNkB

FILE NAME: WR Grace (WRG) DATE: March 28, 1972 DOC#: WRG010 DOCUMENT DESCRIPTION: 1972 Memo from HA Brown regarding MonoKote with attached summaries c o n st u v c t io v p r o d u c t s division TO; 8* C. Eueeker A. K* geseoberg FRCX; 8. A* Brown OUS: lurch Z8f 1972 S O W ; Hono-ttote For your information, ben tfelt&ea went to Europe he planned to have discussions with Or. Ambrose, and tho attached ere sumaries he was going to use for discussing hono-tote with bis. BAB/cgr Attachments B. A. Brown u Page Z Problems - Derailed 1. fcflC-3 contains asbestos, declared toxic by Federal Government and many scare governments - sales banned in many cities. Grace has reformulated Moto-Kote to MK-b, without asbestos. Two new formulations have substituted giberglas for asbestos. - 2. Bond strength of Mono-Kote has been determined by test methods developed ac WRC and CPO. 'Cohesive bond is . evaluated by means of tensile strength (80QflF) and cup test (800F). Adhesive bond I9 evaluated by tensile adhesion (75F), adhesive shear (800F), high temperature flexural tests (600F),. and small sissulated-deck fixe tests ( -- 2000F). Critical Bonding of Two Types A. Cured green bond B. High temperature bond ( T>^00F) ' ' 3 . Underwriters' laboratories (CL) fire rating is a measure % - of time elapsed .(hours) for unexposed deck temperature co exceed 250F above ambient temperacure while temperature rise on the flame exposed surface follows *119 (ASTM designate*}kthermal profile. Test composite consists o f Mono-Kote, of h- specified thickness, on galvanized sceel backed by lightweight reinforced concrete. . ' " . The cost of'each test at UL is a/$10,000.00. The time '.***' * for completion*of test is 2 -3 months, minimum, once scheduling has been set by UL. ' JWK .. - 3/17/72 ,y<(SO-02-1995 16=49 P .03/10 Page 3 CPD/Cambrldge CPD/TR WRC * T o tal 5 Professionals 2 Professionals 1-1/2 Professionals 6-1/2 Professionals 2 Technicians 1 Technician 2-1/2 Technicians 5-1/2 Technicians Page 4 Present Status (Detailed) 1. TVo new formulations that -have obtained U hour fire test ratings at QL and full equivalency co MK-3. Composition: . . , j UL-16A________ Vermiculite Gypsum. Fiberglas (0.5) * Polystyrene (2j) (Chopped Foam) Air Entraining Agent Verm./Gypsuns 1:1.9 L-66__________ Vermiculite Gypsum Fiberglas (1) Cellulose Fiber (10) Air Entraining Agent 1: 1,6 2. MK-3 has anaccepted UL fire rating of 3-^ hours on - various structural steel members which encompass decks, )i/ . , columns an& beams. Actual fire test performance of the '> K 2 new formulations, on similar structural members, was equivalent to or greater than MK-3* . 1017H5 JWK 3/17/72 ...N3U-02-1995 16:49 iMHWmnni1 P .04/10 Page 5 Furure Program - Derailed A. Present Produce 1. Reduce costs by ^s^/ta through manipulation of formulation and costs of rav materials. 2. Improve predictability of product performance by defining effects of environmental curing conditions and quality control. 3. Improve quality control of product Mooo-Koce by in depth understanding of component properties and thelx effects on Mono-Rote placement and cure. * B. Advanced System 1. Dry hose spraying of Mono-Kate has been demonstrated m-- * to be technically feasible by both steam and atomized water, operational parameters for commercial application need to be quantified. * , 2. Expected Improvements in commercial application of Mono-Koce by dry hose spraying are: The envisaged system could achieve, in a single pass, a coating several inches in thickness. 9 Greater adhesion of Mono-Kote-to-galvanized steel ' In thicker coatings (up to 8**} which set in 13 ' minutes is the result of using 75$ less water and - Control of the vater-Mono-Koce ratio. 9 Waste material is estimated at 10iS of that for %* . - * conventional vet-sprayed Mono-Koce, thus requiring . * * less>clean-up. JWK 3/i?m . . t4>n m NOU-02-1995 16:49 P .05/10 W A S O m t M / ( S i m e n t&Airs/t 20V7***1 - * *# *, ** t c /. VERMICOLITE BASEL) PRODUCT a. M K S ; RE W eiG R fPART VERMICULITE OJ * /N ^ * Ni p % Q l" l <l * $ ^ ^ ^ N ^ J < *n ^ ^ f>i ^ r2 2 & . .s . <s W $ i? a & I 's > I r s <* > i Sl v . - . - - ^ $ O N <>> I \b s: 5 3 fl -Ck $> o> ^ *v X ^ 'S <* Oj s- h & 'A S *N l 'S. ' N ^ s C s ,, - Cs $ ^ $ : $$ <*i <o N ^ "< in s * > Si ^ * 5: v* N?# 1 -<i $ Ci 'sl Sr 2& -o If l $ 2017***2 0 1 /9 0 "d Ab :QT CAAT- ^ o- ahm 1 PROBLEM /. ASBESTOS T O X IC IT Y Z. BOND S TR E N G TH ,, Q. COHESION -b. ADHESION ' 3. PIRE RATINGS I i i V **?V it NOU-02-1995 16:49 P .07/10 NOU-02-1995 16=50 PROBLEM ATTACK CONSTRUCTION PRODUCTS DIVISION CAMBRIDGE, MASS. 9 * WIT62* CONSTRUCTION PRODUCT'S DIV. TRAVELER REST, SOUTH CAROLINA WASHINGTON RESEARCH CENTER CLARKSVILLE, MD. P.08/10 NOV-02-1995 16=50 0 P .09/10 P R E S E N T STATl/S 201 NOU-02-1995 16=50 TOTAL P.10 FUTURE PROGRAM A. PR ESEN T' PRODUCT /. IMPROVE COSTS ; 2. IM PRO VE PERFORMANCE . 3. IM PROVE QUA L !T Y CON TROL & ADVANCED S Y S T E M Vi DRY N O S E SPRA Y/NG a Te c n n /q u e S TE A M , WATER, AIR EXPECTED IMPROVERTS 4 IMPROVED BOPPING A E S S CLEAN-UP C SING LE PASS APPLICATION # 4 QUICKER CURING <?. WATER MYDRATION CONTROL r * 4 o fO <0 ro H TJ <3 \ Gl