|Other Name:||Asphalt Stress Absorbing Membrane Interlayer||Single Particle Weight:||≤0.015g|
|Density:||0.85～0.99 G/cm³||Melt Index （135℃，2.16kg）:||≥3g/10min|
|Ash Content:||≤1%||Recommended Dosage:||0.3%-0.5% Of Asphalt Mixture|
SAMI Pavement Preventive Maintenance,
layer combination Pavement Preventive Maintenance,
asphalt rubber membrane interlayer
prevent reflection cracks on asphalt pavement
Stress Absorbing Membrane Interlayer (SAMI) Asphalt Paving is used as the combination layer of the roadbed and the surface layer, or the lower layer of the surface layer. On the other hand, it can prevent the surface water from seeping into the subgrade and cause damage to the subgrade.
About 0.5% of high elastic anti-cracking additive is added to the high-elastic stress-absorbing layer. The high-elastic anti-cracking additive is similar to a rubber band and has good elastic recovery ability, which increases the ability of the stress-absorbing layer to absorb shear stress. The protection of the asphalt surface layer is stronger.
ZTS Stress Absorbing Membrane Interlayer between the cracked structure layer and the asphalt overlay is an effective measure to prevent reflection cracks. It is an asphalt mixture with strong adhesion, impermeability, and good interface bonding performance, can deform with the deformation of the base layer, and has excellent self-healing ability.
ZTA-VE asphalt additive are a new type of composite asphalt additive developed by Beijing Zhongtian Road Tech Co. Ltd. It integrates the technical characteristics of high viscosity, high elasticity, wide temperature range, and warm mixing to improve the crack resistance and fatigue resistance of road materials, reduce the difficulty of road construction, energy saving and environmental protection.
Table 1 Technical indicators of VE high-elastic anti-cracking additive
|Item||Unit||Technical Requirement||Test Method|
|Appearance||-||Uniform and full particles||-|
|Single particle weight||g||≤0.015||-|
When mixing ZTS mixture, firstly add all grades of aggregate and VE high-elasticity anti-cracking additive for dry mixing, then add bitumen and mineral powder, and the mixing time is not less than 45 seconds, of which ZTA-VE additives and aggregate are dry mixed for 10 seconds. The temperature control requirements are shown in Table 2.
|Bitumen heating temperature||140℃～150℃|
|Mineral heating temperature||170℃～200℃|
|Asphalt mixture delivery temperature||150℃～185℃|
|Asphalt mixture waste temperature||＞195℃|
|Initial compacting temperature||≥135℃|
|Repeat compacting temperature||≥125℃|
|Final compacting temperature||≥70℃|
The paving speed of asphalt paver is 3m-6m/min.
The repeat compacting roller needs to be rolled closely with the initial compacting roller.
The initial compacting adopts 13 tons - 15 tons of drum rollers
The repeat compacting adopts 20 tons - 26 tons rubber wheel rollers
The final compacting adopts below 11 tons of drum roller
(The vibration is not turned on during the rolling process)
Traffic can be opened only when the road surface temperature is lower than 50°C
|Item||ZTS high elastic anti-crack stress absorption layer||Rubber Asphalt Stress Absorbing Layer|
|Dynamic stability (Times/mm)||>1500||>500|
|Low temperature bending micro strain (με)||>4000||2000-4000|
|Paving temperature (℃)||>140||>160|
|Rolling temperature (℃)||>135||>155|
|Impact on environmental protection||no effect||Strong smell|
|Ease of use||Directly mixed into the asphalt plant, convenient||Need strict cooperation, strict quality control|
Contact Person: Shakiya