Abstract
In China, a lot of phosphorous slag has not been used. The main reason is that phosphorous slag (PHS) lengthens the setting time of cement. At the same time, the early strength obviously decreases the setting time. Consequently, it can affect the engineering construction progress. Therefore, addition of admixtures can resolve these questions and improve the properties of PHS cement. The paper studied the influence of calcined gypsum, calcined alumstone, sodium sulphate on the strength and pore structure of PHS cement. Results show that PHS cement of 425 or 515 grade can be produced by adjusting technological parameters and using complex admixtures.
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