Problems With Conventional Concrete Pavements
With urbanization on its peak, we are seeing large numbers of paved surfaces being made. Although these pavement are necessary and need of time but there are few factors which we are ignoring constantly and that is our ecosystem.
Now you would think that how on earth pavements construction is related ecosystem? Consider a system with no roads/pavements at all, like in good old times. When It rains in such systems rainwater seeps throught the surface and there is less runoff produced which helps in restoration of ground water table.
Now with these pavements, what is happening is there is an obstruction for rainwater which is increasing runoff. There are number of issues which can be associated including
- Flash Floods
- Ground Water Depletion
Simple Solution is proposed by Tarmac, a UK based construction and materials company which created Topmix Permeable to divert rainwater during storms.
Topmix Concrete has the ability to absorb 36,000 millimeters of water an hour, or approximately 880 gallons every minute which is quite astonishing.
Tarmac is only about 6 months old but the technology has been in development for the last six years, says product development manager Craig Burgess.
Tropmix concrete apparently uses no fine aggregates such as sand instead it is using the concrete known as Nofine concrete. This mix is made up of tiny granite particles packed together using a binder such as cement.
According to TechInsider this system incorporates three types of designs.
A system where all water seeps through and there is no blockage underneath the pavement. This type of model is useful where there is no need of water harvestation.
A system in which is some kind of impermeable membrane is there to divert water in nearby drains or sewers.
In this system all water is harvested and stored which can be used later on. This system is particularly useful in areas where recycling of water is necessary due to unavailability.