| 摘要 |
<p>Use of sulphur concrete for prodn. and lining of salt-, acid-alkali- and solvent-resistant pipes and containers in claimed. The S concrete is obtd. by mixing molten S and dicyclopentadiene as binder with aggregates at 120-160 degrees C. The time for which S and dicyclopentadiene act on one another at the selected temp. is set according to a specific area on a graph of time against temp. S concrete obtd. has improved resistance to chemicals and solvents. e.g. total wear on exposure to (1) 0.1 mol/l NaOH, (2) 6.1 mol/l NaOH was (1) 0.01 mm/year, (2) 2.77 mm/year when using S concrete (I) contg. 22 wt % binder consisting of 95/5 S/dicyclopentadiene. A standard S concrete control sample, (II) contg. 24 wt % S binder dissolved in 3-4 days when exposed to 6.1 mol/l NaOH. S concrete prodn. may take place in 2 steps, and allows mixing binder components in one place, storage and transport, before adding aggregates, opt. at a different temp. In an example, 95 pbw S were mixed with 5 pbw liquid dicyclopentadiene at 135 degrees C and left 135 min. at this temp. Liquid binder was poured onto 354.5 pbw hot sand and mixed 15 min.</p> |
