ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 60, (1) 63 - 67 (2016)


PREPARATION AND PROPERTIES OF ALKALI-ACTIVATED CEMENT CONTAINING PHOSPHOROUS SLAG AND FLY ASH
 
You Duo, Fang Yonghao, Zhu Chenhui, Gong Yongfan , Gu Yamin
 
College of Mechanicsand Materials, Hohai University, Nanjing 210098, P.R. China

Keywords: Alkali-activated cement, Phosphorous slag, Fly ash, Setting time, Strength, Carbonation resistance , Frost resistance, Microstructure
 

Phosphorous slag is an industrial waste which potentially pollutes environments. The aim of the present work is to use phosphorous slag as a raw material to produce alkali-activated cement. The influence of mix proportion of phosphorous slag and fly ash, alkali content and modulus of water glass on the properties of alkali-activated phosphorous slag and fly ash cement (AA-PS-FA-C) was studied. The results show that AA-PS-FA-C with normal setting performance and desirable mechanical properties can be prepared using water glass as the activator. Changing the fly ash content in the range of 0-40 wt% has only a small influence on the setting time of AA-PS-FA-C. The strengths significantly decrease when the fly ash content exceeds 30 wt%. The carbonation resistance of AA-PS-FA-C is similar to that of ordinary Portland cement (OPC), while the frost resistance is much better. The hardened paste of AA-PS-FA-C is much more compact than OPC paste.


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doi: 10.13168/cs.2016.0009
 
 
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