亚洲欧美人成视频一区在线,欧美性20hd另类,欧美性猛交XXXX三人

您的位置：網站首頁> 技術論文

堿-磷渣-粉煤灰膠凝材料的性能與硬化漿體結構

發布時間: 2012-09-15 10:06 查看: 2480次

堿磷渣粉煤灰堿膠凝材料性能微觀結構

為充分利用磷渣和粉煤灰兩種工業廢渣生產高性能膠凝材料,研究了不同磷渣/粉煤灰配合比的堿-磷渣-粉煤灰膠凝材料性能,并用掃描電子顯微鏡和壓汞儀分析了硬化漿體的細觀結構和孔結構.結果表明:堿-磷渣-粉煤灰膠凝材料的凝結時間正常,在粉煤灰摻量為0～30 %(質量分數)范圍內,隨粉煤灰的摻量的增加,堿-磷渣-粉煤灰膠凝材料的凝結時間略有延長.與普通硅酸鹽水泥相比,堿-磷渣膠凝材料的抗壓強度較高,其3d和28d抗壓強度分別可達到30.9MPa和98.8MPa,但其抗折強度相對較低.摻加粉煤灰后堿膠凝材料的抗壓強度降低,而抗折強度提高.堿-磷渣-粉煤灰膠凝材料的耐蝕性和抗凍性能均顯著優于硅酸鹽水泥,其干縮比硅酸鹽水泥的大.用部分粉煤灰取代磷渣粉可一定程度減小干縮.堿-磷渣-粉煤灰膠凝材料硬化漿體的結構非常致密,其孔隙率和平均孔徑均小于普通硅酸鹽水泥硬化漿體.

Abstract：

The performance of alkali-activated phosphor slag-fly ash cement with different phosphor slag/fly ash proportions was studied, and the pore and microstructure of the hardened pastes were analyzed by mercury intrusion porosimetry and scanning electron microscope. The results show that alkali-activated phosphor slag cement has normal setting performance, which is different from that of alkali-activated blast furnace slag cement. The compressive strengths of the cement at 3 d and 28 d reach as high as 30.9 MPa and 98.8 MPa, respectively, and the flexural strengths are lower compared with ordinary portland cement. Adding 0-30% (in mass)fly ash into the alkali-phosphor slag system will slightly increase the setting time, however it will reduce the compressive strength,and improve the flexural strength. The corrosion resistance and freeze/thaw resistance of alkali-activated cement are much better, and the drying shrinkage rate is much greater than ordinary portland cement. Substituting phosphor slag partly with fly ash reduces the drying shrinkage to some extent. The hardened alkali-activated phosphor slag-fly ash cement paste is very dense due to very low porosity and a small mean pore diameter.

點擊圖片進入活動官網預約參會 >>

>> 相關內容