高液限粘土路用填料的改良研究

Study on Improvement of High Liquid Limit Clay Used as Pavement Filling

为了对高液限粘土进行路用填料改良研究,分别对其进行了石灰、粉煤灰、水泥、石灰加粉煤灰以及砂砾的改良试验。试验结果表明,高液限粘土采用4%,5%的石灰改良后,CBR值分别为原土的12.5,14.3,14.7和16.1,15.6,16.0倍;经粉煤灰改良后的高液限粘土CBR强度改善不明显;采用3%,4%的水泥改良后,高液限粘土CBR值分别为原土的9.0,9.0,9.2和12.3,12.8,13.8倍;石灰和粉煤灰联合改良后,高液限粘土CBR值分别为原土的6.5,7.1,8.1和15.0,15.8,16.8倍。

In order for study on the improvement of high liquid limit clay used as pavement filling, carry out test for the improvement of clay mixed with lime, flyash, cement, lime-flyash and grit separately. The result indicates that the CBR value of the high liquid limit clay improved with 4% or 5% lime is 12. 5, 14. 3, 14. 7 or 16. 1, 15.6, 16.0 multiples to that of the original clay; CBR strength of the high liquid limit clay improved with flyash is not increased obviously; CBR value of the high liquid limit clay improved with 3% or 4% cement is separately 9.0, 9.0, 9.2 or 12.3, 12. 8, 13. 8 multiples to that of the original clay; CBR value of the high liquid limit clay improved with lime-flyash is separately 6. 5, 7. 1, 8.1 or 15.0, 15.8, 16. 8 multiples to that of the original clay.