I want to enhance tge thermal performance of asphalt and concretes through adding chemicals, what are these chemicals and thier percentages in mixtures?
Dear Mohamed R. O. Ali
I am not sure about asphalt, but a wide range of synthetic fibers or microencapsulated phase change material (PCMs) can directly affect the thermophysical properties of concrete.
Your question is rather vague. To get meaningful answers, you need to be very specific about what exactly you want to achieve. Also, you should treat portland cement concrete and asphalt concrete separately, since the way to alter their engineering properties is quite distinct.
Dea
Dear Mohamed R. O. Ali,
Chemical additives are some of the most recent emerging WMA technologies. They contribute to improving the ability of the asphalt binder to coat the aggregate particles rather than reducing the viscosity of the binder. These additives confer beneficial featuresinto the warm mix. Additives,whether solid or liquid, are used to promote adhesion of asphalt. Warm Mix Asphalt(WMA) is the generic term for a variety of technologies that allow producers of Hot Mix Asphalt (HMA) pavement material to lower temperatures at which the material is mixed and placed on the road. It is a proven a technology that can: Reduce paving costs.
Polyprolene and Cellulose Additives are most common added to asphalt or concrete to enhance their thermo physical properties. The aggregate can significantly affect the properties of the asphalt mixture. In addition, the high surface temperature of pavement will further exacerbate and material can enhance the thermal stability and mechanical properties too.
Ashish
The addition of fibers can lead to an enhancement in the cracking and rutting performance. However, the addition of fibers may lead to a change in the mix design requirments (increase air voids) in asphalt mixtures. The chimical modification of asphalt binder is an alternative approach. Styrene-Butadiene-Styrene (SBS) is recommended for asphalt modification as proven by previous studies.
- Badges
- Science topic