Abstract:

Polymer grouting technology has been widely used in civil engineering, roads, railways and other existing building foundation reinforcement. Due to the special requirements of airport pavement construction of non-stop flight, this technology has not been applied in the field of airport engineering. Some polymer materials are chosen as subgrade reinforcement materials, and the compressive strength, elastic modulus, maximum expansion force with the change of material density are studied. Test results show that when the density of polymer solidified slurry increases from 86.72 kg/m3 to 290.66 kg/m3, the yield compressive strength increases from 1.55 MPa to 11.61 MPa, the elastic modulus increases from 21.25 MPa to 106.17 MPa, and the stress-strain relation appears brittle tendency with the increase of density. The polymer solidified slurry density is between 92.13 kg/m3 and 420.36 kg/m3,and the maximum expansion force is between 0.11 MPa and 1.12 MPa. The greater the density is, the greater the maximum expansion force becomes, and the faster the growth rate of expansion force is. Generally, within 60s, the expansion force will be able to reach the maximum expansion force by about 90%. The conclusion can provide reference for dealing with the application of polymer grouting reinforcement technology in airport non-stop flight.

Key words: airport engineering, polymer grouting material, density, compressive strength, elasticity modulus, expansion force