Document Ed43wqJ1rxQMJxZjVO4Q2ynm0

FILE NAME Kaiser Cement KCEM DATE 1972 May 12 DOC KCEM006 DOCUMENT DESCRIPTION Memo KAISER CEMENT & GYPSUM CORPORATION OFFICE MEMORANDUM TO G. C. Davis DATE May 12 1972 COPIES TO J.C. Mc Coe FROM J. C. McCoe SUBJECT REPLACEMENT OF ASBESTOS IN PLASTIC AND GUN PLASTIC CEMENTS Due to the increased adverse to workers from use publicity of possible of asbestos building products detrimental health effect I circulated to company personnel several memos asbestos requesting an investigation in our plastic and gun plastic cements to find a substitute Asbestos for pose in these cements It functions serves a dual pur- pumping as well as increases as a lubricity in gun plastic to facilitate vertical wall surfaces cohesiveness which facilitates placement on J. Post has furnished me with from Phil Westfall which a copy of a brief report dated March 10 states 1972 Among the possible replacements evaluated pressed polystyrene beads diatomaceous were coarse and fine wood fibers polymer latex and earth Methocel a methylcellulose asbestos exhibited vermiculite The cement with Methocel replacing the characteristics cohesiveness and lubricity both of which are desirable for a plastic or gun plastic cement strength reduction was realized However a substantial None of the other upon replacing the asbestos with Methocel materials evaluated when interground with cement which approached the laboratory ground cement produced gun plastic Note Strength reductions were approximated a 76 reduction at too major for I and 7 days consumer 80 at 7 acceptance days These This means to J. Post they have not they evaluate located a satisfactory use of limestone chips substitute I recommended as a substitute The quality Regardless I feel this matter should be lawyers in the brought to the attention of our using the cemenetvent we may sometime have legal action instituted by someone FORM 150 PmImannna .,. nan eK,