Use of Rubber Mat to Improve Deformation Behaviors of Ballastless Tracks Laid on Bridges

Table 2

The main parameters of two types of isolation layers in this work.

No.	Index	Unit	Limits
The material of geotextile isolation layer
1	Tensile strength	kN/m	≥48
2	Elongation	%	70 ± 20
3	Bursting strength	kN	≥8.5
4	Tearing strength by trapezoid method	N	≥900
5	Acid and alkali resistance	%	Retention rate ≥90
6	Wear resistance	%	≤25
The material of subballasted mat isolation layer
1	Static stiffness	MN/m	3.0 ± 0.5
2	Determination of compression	%	≤23
3	Tensile strength	MPa	≥3.0
4	Elongation	%	≥150
5	Fatigue property
	Appearance	No tearing or breakage occurs
	Residual deformation	mm	≤1
6	Water resistance	%	≤1.0