Modification of Retarder on Desulfurization Gypsum Wall Material

Fu Sheng Niu; Ai Hong Guo; Xiang Wen Feng; Ying Meng

doi:10.4028/www.scientific.net/AMR.741.45

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 741Modification of Retarder on Desulfurization Gypsum...

Modification of Retarder on Desulfurization Gypsum Wall Material

Abstract:

In order to broaden the utilization of desulfurization gypsum in China and achieve the direct usage of desulfurization gypsum, in this paper, citric acid (CA), sodium citrate (SCA), sodium tripolyphosphate (STPP), Sodium hexametaphosphate (SP) were selected as retarder to modify desulfurization gypsum. The experiment results are as follows: the effect of SP, STPP, CA, SCA on desulfurization gypsum initial setting time is obvious; the turn is STPP> CA> SCA> SP; when the retarder dosage of STPP in desulfurization gypsum reaches 0.5%, the initial setting time can be extended to 210 min, the final setting time to 240min, which fully meets the demand of gypsum-site construction; inhibiting gypsum particles dissolution and preventing the growth of crystal nucleus are the fundamental reasons of STPP.

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Periodical:

Advanced Materials Research (Volume 741)

Pages:

45-48

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.741.45

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Online since:

August 2013

Authors:

Fu Sheng Niu, Ai Hong Guo, Xiang Wen Feng, Ying Meng

Keywords:

Desulfurization Gypsum, Final Setting Time, Initial Setting Time, Retarder

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