Recycling Sewage Sludge into Concrete

River Water Treatment Plant in UKAY Perdana, Ampang
River Water Treatment Plant in UKAY Perdana, Ampang

Wastewater plants in Malaysia face the major challenge of disposing the sludge that is left over from treating sewage water. While studies show that the volume of sludge is expected to rise, disposal options are limited due to strict environmental regulations. Meanwhile, the construction sector seeks economic and ecological cement replacement materials in order to meet the rising demand for concrete.

SmartRock™ Plus Sensor
*For eligible new customers only

Get a Free Trial Kit

  • Free Sensor*
  • Free Shipping
  • No Strings

In a study published in the Pertanika Journal of Science and Technology, researchers from Universiti Teknologi MARA investigated the potential to replace various quantities of cement with processed sewage sludge to create a concrete mixture.

The researchers first produced domestic waste sludge powder (DWSP). They dried and burnt wet sludge cake to remove moisture, and then ground and filtered the dried sludge cake to make DWSP. Using varying proportions of DWSP (3, 5, 7, 10 and 15%), the researchers mixed the material with cement to produce normal strength and two higher strength grades of concrete. They then compared each DWSP concrete mixture with normal concrete in terms of their compressive strength, water absorption, water permeability and permeability to salt.

Overall, the researchers found that while DWSP has a potential role in the manufacture of concrete. The performance of DWSP concrete blends tends to decline with increasing concentrations of DWSP. For example, the compressive strengths of DWSP concrete generally decreased as the proportion of DWSP increased in concrete mix. Also, both water absorption and water permeability increased as the percentage of DWSP increased. However, resistance to salt increased for concretes containing up to 15% DWSP.

“Overall, there is potential for using DWSP as a partial cement replacement,” the researchers say. “However, more detailed research should be conducted to yield better quality powder.”

Source: http://www.researchsea.com/

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Articles

giatec award for best paper

Giatec Award for Best Paper

We are very excited to announce the launch of our annual research paper contest! This is a great opportunity for civil-engineers to expose their research and development to a global audience of industry experts. Plus, the…

Schematic representation of service-life stages for structures exposed to chloride-induced corrosion risk

Analyzing Corrosion in Reinforced Concrete Structures

Reinforced concrete structures have shaped our cities for thousands of years, from historical buildings stretching as far back as the Romans to present day, such as the 3-storey parking garage adjacent to the mega shopping mall…

Concrete Robot

Concrete-Eating Robots – The Future of Recycling Old Buildings

The process of demolishing a building involves heavy machinery to crush concrete and separate valuable materials that can be reused. Current methods consume quite a significant amount of time and money in order to safely disassemble the building, extract parts, and transport the materials to off-site centers…

rcon

Why Measure Concrete Resistivity?

Concrete is a porous material which contains microscopic voids known as pores. These pores range in size, vary in connectivity (pore structure) and can be added to the concrete via air-entraining admixtures. The water-to-cementitious material and…

completed road

Open Roads Sooner with Concrete Curing Sensors

Road construction can be a lengthy, disruptive process—so ensuring that your project stays on schedule is one of your most important responsibilities as a project manager. *For eligible new customers only Get a Free Trial Kit…

We use cookies to provide you with a better experience, analyze site traffic and assist in our marketing efforts. By continuing to use this website, you consent to the use of cookies in accordance with our Privacy Policy Page.