Document B8Rjw0mx9D6eN27rwLDZrmQk4

FILE NAME: Kaiser Gypsum (KG) DATE: 1972 Sept 7 DOC#: KG073 DO CUMENT DESCRIPTION: Memo RE Asbestos - Kaiser Cements COPIES TO SUBJECT K A I S E R C E m E. s T <S> G Y P S U M C O R P O R A T I O N INTER-OFFICE MEMORANDUM J. E. Toomey - w / a t c a c h G. C. D a v i s J. K. P a r k e r - w / a t t a c h DATE S e p t e mb e r 7, 1972 n) flnjcnK W ^ y^. W-C, H- . OM J. C. McCoe SEP 8 m ASBESTOS - KAISER CEMENTS c o m p a n ie s patent dept Oa k l a n d , c a u p . There are three cu rre n t cement products which contain asbestos fib e r s . These are: -1. P e r ma n e n t e P l a n t P l a s t i c Gun Cement - 2 . 5 % by w e i g h t o f a s b e s t o s f ibers. 2. Permanente P l a n t P l a s t i c Cement - 1.0% by w ei gh t of a s b e s t o s f i b e r s . 3. Cu she nb ury P l a n t P l a s t i c Gun Cement - 2 .1 % by w ei gh t of a s b e s t o s fibers. These three cements are u t i l i z e d by the c o n s t r u c t i o n trade f o r cement p l a s t e r (s tu c c o) p r i n c i p a l l y a p p l i e d to e x t e r i o r w a l l s of homes, a p a r t ments, etc. The P l a s t i c Gun cements are a p p l i e d by machine ( p l a s t e r g u n ) ; w her eas , P l a s t i c cement i s a p p l i e d m a n u a l l y . The cements a re used with between k to 5 p a r t s by volume of clea n p l a s t e r sand and water to produce a c o h e siv e , workable mix. A l l p l a s t e r is machine mixed. There can be c o n s i d e r a b l e a i r - b o r n e d u s t i n g in the v i c i n i t y of the mixer as the bags of cement are broken and emptied into the hopper of the mixer. As the sand and cement are mixed, p r i o r to the a d d i t i o n of the water, there is d u s t in g , a ls o . These c o n d i t io n s are our concern. The cements are e s s e n t i a l l y type II sta n d ard p o r t l a n d cement to which several percents of mineral p l a s t i c i z i n g and a i r - e n t r a i n i n g agents are added, p lu s the small p e r c e n t s of a s b e s t o s f i b e r noted. The cements are app ro xim ate ly 9^ to 96% type II (s tan d ar d) p ort la n d cement. What o t h e r in fo r m a tio n is n eed ed , Jim? JCM/mr At tachments FO R M ISO I cr\ /n o o o n o a n n /H