| 칼슘 설포알루미네이트계 팽창재를 혼합한 시멘트 경화체의 내해수성(I) |
| 전준영, 송종택1 |
단국대학교 신소재공학과
1현대시멘트 연구개발과 |
| Resistance to Sea Water of Hardened Cement with Calcium Sulfoaluminate Type Expansive Additives(I) |
|
|
|
|
|
|
|
| ABSTRACT |
|
Hardened cement pastes of OPC which contains 10 wt% CSA type expansive additives were immersed in aqueous solution of 10 wt% MgS $O_4$.7$H_2O$ and then investigated by compressive strength, XRD. SEM and DSC etc.. According to the results including the hydration products and the microstructure of the hardened paste, the case of CSA type expansive additives［No. 6(C/(equation omitted) : 2.29, A/(equation omitted) : 0.16)] prepared from raw materials increased the resistance to $Mg^{2＋}$, S $O_4$$^{2-}$ ion diffusion than that of OPC paste due to the densification by the formation of fine ettringite in the first stage and the hydrates according to $beta$-C$_2$S hydration in the late period. |
| Key words:
Calcium sulfoaluminate, $MgSO_4$, Ettringite, $Ca(OH)_2$, $Mg(OH)_2$ |
|
|
|
PDF Links
Full text via DOI
Download Citation 
