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《Cement》 2010-11
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Effect of CaO on hydration and hardening of phosphorous slag Portland cement

HAO Jin-gao,GUO Cheng-zhou,ZHOU Wei-bing School of Materials Science and Engineering of Wuhan University of Technology,Wuhan 430070,Hubei,China  
The effects of different CaO content on the hydration properties and microstructure of phosphorous slag cement were studied.To approach the above-mentioned purposes,the setting time,mechanical properties,chemical combined water content of this type of cement,and also reaction rate of phosphorous slag were tested,the SEM and XRD analysis were also used.The results showed that the compressive strength of the phosphorous slag cement increased with CaO content increasing.However,the 3d and 28d compressive strength could be decreased,if the CaO addition was over 2%.Activity of phosphorous slag were motivated by CaO mainly at early hydration age of phosphorous slag cement.28d reaction rate of phosphorous slag of phosphorous slag cement mixed with 2% CaO,was only increased by 4.1% than that of 1d.
【CateGory Index】: TQ172.44
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