|Other Name:||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|
Membrane Interlayer highway construction and maintenance,
0.85g/cm3 highway construction and maintenance,
maintenance and repair of roads
prevent reflection cracks on asphalt pavement
Reflective cracking is a common disease in asphalt pavement. Reflective cracks destroy the integrity of the road surface and affect the appearance of the road surface. Water enters the base layer through the cracks to accelerate the destruction of the asphalt pavement and seriously affect the performance of the asphalt pavement.
Overlaying the old pavement with new surfacing material is one of the commonly used methods for rehabilitating deteriorated pavements. The existing cracks in the old pavement propagate through the newly laid overlay and reach the free surface in due course of time. This phenomenon is referred to as reflection cracking. In general, using of stress absorbing membrane interlayer (SAMI) is one of the methods to control reflective ceacking.
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