Asphalt quality improverTypeGAM-(II)
The performamse of conventional asphalt is based on the temperature condition set by the pavemet road network of 60 ℃
But in recent years there are casea where the road surface temperature exceeding the reference temperature is measured.
If the DS test is carried out on the reformed2 pavement material st a temperature of 70 ℃, the strength will decrease to about 1/5.
And there were many damage to the pavement which seema to be due to the resord ho weather in 2007 in Japan.
Currertly, it is confirmed than the road surface temperture becomes 65 ℃ or more,and it is currentle the case that the current law cannot maintain necessary and sufficient performance.
Influence of rise in pavement temperature by wheel tracking test
Dense grain (13) asphalt mixture produced according to current law (new type 2 reforming)
・Specified value of test
Dynamic stability at 60℃ = 3,000 or more
・Above : test temperature 60 ℃ = about 5mm
・Below : test temperature 70 ℃ = about 25mm
Average dynsmic stability at 60 ℃
DS = 4,366 (time/min)
Average dynsmic stability at 70 ℃
DS = 880 (time/min)
Regenerated dense grain (13) asphalt mixture using GAM-(II) type (100% recycled asphalt used)
・Recycled asphalt dense paruicles (13) 100% used
・Design asphalt amount 5.8%
・Regeneration additive Type GAM-(I) addition amount 0%
・Quality improving Type GAM-(II) addition amount 20%
・The depth of wheel track = about 0.5mm
・Stability = 17.91 KN
・Dynamic stablity at 70℃
DS = 15,750 (time/min)
Additive effect of Type GAM-(II)
1.The stability improves with the addition amount.
2.70 ℃ Dynamic stability improves.
3. Improve peeling resistance.
4. The mixing temperature can be lowered to 155℃
and the rolling temperature to 145℃
(Contributing to CO2 emission reduction)
5. Improvement heat retention
6. Decrease of specific gravity
7. Prevent of asphalt adhesion to work equipment
(Improvement of working efficiency)
Characteristics of GAM-2 type
Since the conventional modified asphalt is distributed in the state that the modifying agent is dissolved in ordinary asphalt, a plurality of asphalt tanks are required and since the respective tanks are heated and kept warm ,the distribution cost and the storage cost are eatremely large It was getting.
GAM-2 is a new type of concentrated type quality improver containing thermo-reversiblepolymer type modifire as 80% and asphalt 20%, and it can be used by diluting it at an arbitrary ratio at the time of manufacturing asphalt composite material It is possible and it is possibleto add preformance equivalent to that of asphalt or blown asphalt etc., based on asphalt as a base by changing formulation desing according to required performace.
The example of Formulation plan Type
By adjusting the design according to the purpose of use, you can freely change the performance characteristics.
※Click to enlarge
A low-carbon society is a social and economic system that significantly reduces greenhouse gas emissions without affecting economic development.
Because modern society relies on fossil fuels for most of energy sources, it generate a large amount of greenhouse gases.
transition to a low-carbon society is required avoiddangerous climate change represented by global warming.
As representative countermeasures, “Energy efficiency improvement”, “Reduction of energy demand “, etc.
There are such technologies that we can contribute to these global environment are as follows;
・Technology to produce high quality recycled raw materials
・Development of recycled products effectively utilizing recycled materials
It is possible to summarize in above two points.
Besed on the chemical technologies we have cultivated over the yeears, we have developed various plastic recycling technologies.
Regeneration systems that do not rely on volumetric reduction by heating have the same performance as thoseusing new materials wihtout impairing the ohysical properties of plastics and strength of recycled products.
In the future we will further develop current technology, we will work development of substitute products that can effectively utilize recycled plastics raw materials and replace them with existing petroleum-based products.
The development of room temperature construction type paving material that does not use petroleum asphalt and does not need to be heated even at the time of manufacturing/construction is the first step our company is aiming for.
