Study finds disposable diapers can replace sand used in concrete, mortar for low-cost housing; mixtures can contain up to 27% diaper content for columns, beams in one-story house, can include diaper materials such as polyester, PE, PP, viscose, cotton

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KITAKYUSHU, Japan , May 22, 2023 (press release) –

Up to eight percent of the sand in concrete and mortar used to make a single-story house could be replaced with shredded used disposable diapers without significantly diminishing their strength, according to a study published in Scientific Reports. The authors suggest that disposable diaper waste could be used as a construction material for low-cost housing in low- and middle-income countries.

Disposable diapers are usually manufactured from wood pulp, cotton, viscose rayon, and plastics such as polyester, polyethylene, and polypropylene. The majority are disposed of in landfill or by incineration.

Siswanti Zuraida and colleagues prepared concrete and mortar samples by combining washed, dried, and shredded disposable diaper waste with cement, sand, gravel, and water. These samples were then cured for 28 days. The authors tested six samples containing different proportions of diaper waste to measure how much pressure they could withstand without breaking. They then calculated the maximum proportion of sand that could be replaced with disposable diapers in a range of building materials that would be needed to construct a house with a floorplan area of 36 square metres that complies with Indonesian building standards.

The authors found that disposable diaper waste could replace up to ten percent of the sand needed for concrete used to form columns and beams in a three-story house. This proportion increased to 27 percent of sand needed for concrete columns and beams in a single-story house. Up to 40 percent of the sand needed for mortar in partition walls can be replaced with disposable diapers, compared to nine percent of the sand in mortar for floors and garden paving. Together, up to eight percent of the sand in all of the concrete and mortar building materials required to build a single-story house with a floorplan of 36 square metres can be replaced with disposable diaper waste — equivalent to 1.7 cubic metres of waste.

The authors note that wider implementation of their findings would require the involvement of stakeholders in government and waste treatment in developing processes for the large-scale collection, sanitising, and shredding of diaper waste. Additionally, building regulations would need to be modified to allow the use of diaper waste as a construction material.


Article details

Application of non-degradable waste as building material for low-cost housing

DOI: 10.1038/s41598-023-32981-y

Corresponding Author:

Siswanti Zuraida
The University of Kitakyushu, Japan

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