Experimental Study on Compression Characteristics of Q2 Loess in Acidic Environment

In view of the deterioration of physical and mechanical properties of soil due to acidic pollution,laboratory routine and compression tests have been conducted on artificial acid samples of Q2 loess soil to investigate double factors of acid soaking time and acid concentration on the void ratio,moisture content and other basic physical parameters,as well as the variation of compression coefficient,compression modulus and the compression curve of e-p.Meanwhile,the water-acid coupling effect on the compressibility of loess is studied.The results show that under the same acid soaking time,the moisture content,void ratio,and compression coefficient gradually increased with the increase of acid concentration,while the compressibility modulus reduced.After soaking for 12 days,the acid concentration increased from 0.1 mol/L to 3 mol/L,and the compression coefficient a1-2 increased from 0.355 MPa-1 to 1.275 MPa-1,accompanied with the decrease of compression modulus Es1-2 from5.580 MPa to 1.855 MPa.When the acid conce