| 摘要 |
<p>1474702 Cement composition H JAKLIN 25 Sept 1974 [25 Sept 1973] 41733/74 Heading C1H A concrete or mortar composition of improved resistance to corrosive liquids (e.g. acids, brines and sulphate-containing waters) comprises cement, calcium sulphate, water and at least 0À5% by weight (based on the cement) of one or more sparingly soluble barium compounds selected from barium oxalate, barium fluoride and a barium silicate hydrate having a BaO : SiO 2 mole ratio of 0À5 : 1 to 1À2 : 1. The cement is preferably selected from Portland cements, iron Portland cements, blast furnace cements and tross cements (Puzzolan cements), to which also raw flour or fly ash can be added. Fillers which may be present in the composition are sand, gravel, tross, expanded clay, foam lava, pumice, foamed polystyrene, cork and polyurethane foams.</p> |
