| 摘要 |
Disclosed is a mixture comprising two components to be mixed together to form a settable cementitious composition wherein a first component comprises: (a) Portland cement; (b) calcium sulphate; and (c) water in a weight ratio of water to Portland cement and calcium sulphate solids of from 0.5:1 to 5:1; and a second component comprises: (d) a water soluble silicate; and (e) water, in a weight ratio of water to silicate solids of from 1.5:1 to 25:1; which cementitious composition has a high early strength. The mixture is suitable to be used in an inflatable support for use in mines, since it hardens slowly and remains its plasticity in order to deform under load. |
