摘要 |
<p>Strengthening additive, esp. for cement mortar and concrete is produced using liq. glycidyl polyether as resin and liq. hardener, both of which contain pptd. silica powder before they are mixed in stoichiometric ratio. The silica converts the components and the mixt. itself into powder form, which has unlimited storability in the absence of moisture. Addn. of this mixt. is not detrimental to the storability of cement and improves its mechanical strength, imperviousness and chemical stability.</p> |