| abstract |
PCT No. PCT/DK91/00098 Sec. 371 Date Nov. 12, 1992 Sec. 102(e) Date Nov. 12, 1992 PCT Filed Apr. 10, 1991 PCT Pub. No. WO91/15435 PCT Pub. Date Oct. 17, 1991.A cement composition comprising 1) a cement containing water-soluble chromate and 2) at least one manganese(II) compound in an amount sufficient to reduce the amount of water-soluble chromate to at the most 2 mg of Cr(VI) per kg of the cement, the determination of the chromate content being carried out by elution of the composition in water for 15 minutes at a water/cement ratio 1, filtration and determination of the chromate content in the filtrate. |