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Problems in the Use of High Alumina Cement

(1) The most suitable hardening temperature is about 15 and the ambient temperature is not more than 25, otherwise it will produce the crystal type conversion and the strength is reduced. Concrete with high aluminum cement mixing can not be carried out by steam curing.
 
(2) Strictly prohibited high alumina cement and Portland cement or lime mixed use, nor with the not yet Hardened Portland cement concrete contact, otherwise it will cause condensation instantaneous, even to the construction and intensity is very low.
 
(3) The long-term strength of high alumina cement, due to crystal transformation and aluminates gel aging, decreased. In order to be used in the engineering, the minimum stability strength should be designed according to the GB201-2000, and the value is determined by the test.
 
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