Paper Title:
Rehydration Performance of Binary Binders Made with Dehydrated Cement Paste and Phosphogypsum
  Abstract

This paper presents the rehydration performance of binary binders made with dehydrated cement paste (DCP) and phosphogypsum (GP). DCP was obtained by thermal treatment of hardened cement pastes in which the initial water to cement ratio was 0.5. DCP we mixed with phosphogypsum (PG) to prepare the binary binders . The effect of PG on the physical and mechanical properties of the binary binders was investigated. Scanning electron microscope (SEM) was used to indentify the structural characteristics of the rehydration products. The results showed that the setting time was prolonged and the compressive strength increased slightly by mixing DCP with PG. Microstructural observations indicated that an remarkable amount of ettringite intergrows with the hydrated calcium silicate to form a network structure. Thus, the addition of phosphogypsum can not only utilize the industrial by-product, but enhances the hydraulic properties of the DCP.

  Info
Periodical
Key Engineering Materials (Volumes 474-476)
Edited by
Garry Zhu
Pages
1238-1242
DOI
10.4028/www.scientific.net/KEM.474-476.1238
Citation
T. Sun, Z. H. Shui, T. Huo, "Rehydration Performance of Binary Binders Made with Dehydrated Cement Paste and Phosphogypsum", Key Engineering Materials, Vols. 474-476, pp. 1238-1242, 2011
Online since
April 2011
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Price
$32.00
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