Document ExxmOxMg3ZQLRgDkg3bJ6w3ob

FILE NAME Kaiser Cement KCEM DATE 1975 Nov 5 DOC KCEM012 DOCUMENT DESCRIPTION Memo KAISER CEMENT & GYPSUM CORPORATION OFFICE MEMORANDUM TO J. W. Post DATE November 5 1975 COPIES TO L. Erwin L. Kirk J. F.F. Pennell J. I. Walker ~ I. M. Watson FROM RES R. E. Sharpe SUBJECT SUBSTITUTES FOR ASBESTOS IN PLASTIC CEMENT W 694-681 I talked with Mr. Nate Greening of PCA in regard to done with materials to aid any work they have the following materials pumpability of plaster mixes He mentioned unsuccessful they have tried some of which were either properties of asthea ppulmapsitnegr aid or were deleterious to the physical Paper Pulp Fiber " Talc Mineral Wool Starch Polyox pumpaid marketed by W. R. Grace Methylcellulose plus Lime They found the best materials were paper pulp or mineral wool Talc worked well but it is chemically close to asbestos either The other materials entrained too much air caused slow sets or reduced the of the plaster to stick to the wall ability He suggested that we They found that high try C3A various proportions of expansive cement in cement would enhance the pumpability Based on his recommendations I amounts of expansive component pulp and mineral wool think we and also should try additions of small run more tests with paper RES FORM 180 LEV082203A