| 摘要 |
This improved process produces concrete, mortar etc. at a low water to cement ratio and uses ice blocks instead of water. Cement, aggregates such as sand, gravel etc. and small ice blocks are mixed at a low water-to-cement ratio to prepare a macroscopically uniform system consisting of a pseudo solid phase wetted with a small amt. of molten water formed on the surface of the ice blocks. Then the ice blocks gradually melt to produce a homogeneous mixture prior to the application of the mortar. The ice blocks are ice sliced with an ice slicer, granular ice, small pieces of ice or snow. A powder of water-soluble polymer (methyl cellulose) can be added direct to the ice-cement mixture or an aq. soln. of this polymer can be frozen to form the ice blocks. This process can be used to obtain heavy wt. concrete that contains high specific gravity (at least 3.0) aggregates using a water cement ratio of 45% or less. The process can be used to produce mortar having a low-temp. tolerance (for this use the water/concrete ratio up to 45%), or to produce reinforced mortar (the ice contains the reinforcement materials.). |
