Stressing Cement

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Stressing Cement

a variety of expanding cement produced by grinding together portland cement clinker (65 percent), alumina slag (15 percent), and gypsum and lime (5 percent).

Stressing cement is a quick-setting and quick-hardening binder. The strength of its mortars (1:1 composition) after 24 hours is as high as 20–30 meganewtons per sq m (MN/m²), or 200–300 kilograms-force per sq cm (kgf/cm²). Hardened stressing cement is highly waterproof. As it expands during hardening, it develops high pressures (3–4 MN/m², or 30–40 kgf/cm²), which may be used for the production of prestressed reinforced-concrete structural members in which the reinforcing rods are tensioned in one or more directions. Stressing cement may be used effectively in the production of pressure piping, tanks, and some types of thin-walled reinforced-concrete components.

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