Document X58yqYoQko4r2pYkR8Zxrg7d

M.H. OSTRICH CO. TO - r *h_. grserl SUBJECT laboratory memo ENGINEERING oept " ' ' FROM ,, ----------------1, ,?.. .,Martian.________ Dearete 25 using Air 2ntraining Caaent April. 22, 1959 "---------r--;------- ------------ CLASS I PROJECT DATE Acril 2L. Gentlana On the above date testa vere stada to determine the benifita if any, b7 the use of Air-2ntraiaing ceuant in our Decrete 25j In place of our standard Em 2* Cement* Two iadentical bleed* of 250# each vere setup, except that in one bland Air retraining scoont van substituted for regular High-Zariy, Correct 7/C ration -'cn-a detsminc-d in the l&h and 3 C/T xixar vaa used to cccjplatalT rix AC# of each id end it vns found that 3 uiirctna -/as required to gat the cement to ciurini- cossistssiPu :rr.r >**,* r'T /. ,*?1 .".'Itf ?> Tact A " Oairg Regular H,2. Ceaent in reader. No Aggregate adjustment, Test A - 40# Blend ?7t5# voter - 'iin 3 sinntsa -t 2-1/22 C/F Rjqc 2C# ccoeat p,ci'. in place. root .7=2 - l-uiog AiJV Satraiaiag Cement Lv. Binder. :;o o^r-Osato cdj vl j'OjlV-- i. Test #2 - 40# Bleed ic5.? vacar - Hix J xdnutee yield s C/f -?-0 Hoq, 20-ir cawert p,c,f. in place ' ;i .`3 - Blond t?>an o:i 'iarshouo'j atede, A^ipragat* adjusted for proper yield. To.ot #3 - 51ond ? vats r 1***h-.iS2x-2-.5Cr.nf/aol;tnut." a yield 0 tteq. 2iu2 (. >/ assent poC*l' in piece. F.oearkM From the above it would ssea that the use of A, 2, cosent does cat bsnifit yield in this type of product for the reason that the crount of sir entrained is off-aat by the reduction in v&ber of placability. Further the high yield obtained above cannot bo expected in the field as our acacurcaeot vere taken in noD-absorcant containers which gsra the boaifit of all tho water in the aix hich would not be true in the field. Respectfully submitted, * -.2__ '}. -- B PLAINTIFF . EXHIBIT I \ MHD- .83