| 摘要 |
<p>The insulating and patching material is intended for repairing ferro-concrete and concrete constructions in the chemical industry when handling organic materials or radioactive waste products. First sulphur is melted at a temperature of 140 degrees C and then it is slowly cooled down to a temperature of 70 to 80 degrees C and heated up again to 140 degrees C, or un-melted sulphur is modified by adding 0.5 to 1.0%, depending on the weight of sulphur, of a mixture of polymerization and polycondensation residues on the basis of the terephthalic acid during the production of plastic materials, including plasticizers and solvents and together with a mineral filler; the weight ratio of sulphur to the mineral filler is 1:2 to 1.10, it is mixed for 1 to 3 minutes at a temperature of 140 degrees C and then set. Silica sand, ash and gravel sand or corundum are used as the mineral filler.</p> |
