Influences on Engineering Properties of AS Firming Agent Modified Soil by Freeze-thaw Cycles |
| |
| Authors: | WANG Tianliang ZHANG Liling LIU Yaojun and BU Jianqing |
| |
| Institution: | School of Civil Engineering;Key Loboratory of Roads and Railway Engineering Safety Control of Ninistry of Education,Shijiazhuang Tiedao University, Shijiazhuang 050043, P. R. China;Tianda Zhuoran Design Office, Shijiazhuang 050040, P. R. China;School of Civil Engineering;Key Loboratory of Roads and Railway Engineering Safety Control of Ninistry of Education,Shijiazhuang Tiedao University, Shijiazhuang 050043, P. R. China;School of Civil Engineering;Key Loboratory of Roads and Railway Engineering Safety Control of Ninistry of Education,Shijiazhuang Tiedao University, Shijiazhuang 050043, P. R. China |
| |
| Abstract: | To study the freeze-thaw durability of Aught-Set(AS) firming agent modified soil, a series of triaxial tests were conducted. The mutual relationships between stress-strain relationship, static strength, dynamic modulus and critical dynamic stress of AS firming agent modified soil and curing time, freeze-thaw cycles, cooling temperature were deeply analyzed. The results show that the unconfined compressive strength of 7 d is 75% than that of 28 d. The stress-strain curves of AS firming-agent modified soil are strain-softening and in brittle failure shape. The static strength, critical dynamic stress and resilient modulus decrease in exponential form with the increase of freeze-thaw cycles, and after 6 cycles of freezing and thawing, the trend is stable. Under the same dynamic stress, the cumulative plastic strain of samples develop from stable state to failure because of freezing and thawing. After many times of freeze-thaw cycles, the lower the negative temperature, the little influence on the mechanic properties. |
| |
| Keywords: | freezing and thawing cycles Aught-Set soil firming agent stress-strain critical dynamical stress dynamic modulus |
|
| 点击此处可从《保鲜与加工》浏览原始摘要信息 |
| 点击此处可从《保鲜与加工》下载免费的PDF全文 |
|
