The project is a brilliant example of the circular economy in action; used diapers are not treated as waste to be sent to landfill, but are instead recovered for their materials and given a new lease of life.
The first trial, on the B4336 at Pontweli in March 2024, took around four tons of used diapers—the equivalent of some 80,000 diapers—out of landfill. The project was particularly significant considering that, in 2023 alone, Carmarthenshire collected around 6 million diapers, underlining the size of the waste stream and the opportunity to seek new applications for it.
Carmarthenshire County Council’s official website says that in the past, they teamed up with local recycling company Nappicycle on a trial project aimed at solving two problems at once: the growing amount of nappy waste and the effect of traditional road maintenance on the environment. What if the disposable diaper changed a baby’s day, and then went on to help build the road outside your home? An unusual recycling experiment in Wales has transformed thousands of used diapers into an unexpected ingredient for road construction, offering a glimpse into how everyday waste could become a valuable resource.