New research from the Niels Bohr Institute shows that cement made with waste ash from sugar production is stronger than ordinary cement.
The research shows that the ash helps to bind water in the cement so that it is stronger, can withstand higher pressure and crumbles less. At the same time, energy is saved and pollution from cement production is reduced.
Cement is comprised of chalk and clay, which are mixed together and heated at high temperatures in a cement kiln. The mixture is then crushed into a powder. When the cement powder is mixed with water a chemical process takes place, which causes the cement mixture to harden. Cement is used as a building material throughout the world.
In some countries where sugar cane is grown, agricultural waste product from sugar production has been added to the cement mixture for many years. Once the sugar has been extracted from the sugar can you are left with a lot of fibre waste, which is used as fuel for energy production. From the energy production you get a lot of ash, which needs to be disposed of. In some countries, like Cuba and Brazil, the ash is added into cement mixtures.
“I have been studying cement using quasi-elastic neutron scattering for several years and researchers from Brazil asked whether I wanted to analyse samples of cement mixed with waste products in the form of sugar cane ash. I decided to say yes to the project, which aimed to investigate the properties on a nano-scale and map the mobility of water in the cement. The quality and strength of cement is directly related to how much of the water is chemically bonded. The more the water can move around, the worse it is for the strength and durability,” explains Heloisa Bordallo, who does research in nanophysics at the Niels Bohr Institute at the University of Copenhagen.
Neutron scattering reveals water
Heloisa Bordallo was sent a number of cement samples from Brazil. The samples contained varying amounts of ash from sugar can production. Their innermost dynamics were then examined. This took place at the ISIS facility in the UK. The samples were placed in an instrument where they were bombarded by neutrons.
“Using neutron scattering, we can see how the water inside the sample moves. Neutrons are shot into the sample and when neutrons hit the water’s hydrogen atoms, they interact and the neutrons scatter and are picked up by the detectors. We repeat this for several hours and by analysing the data we can determine how the water inside the sample is moving and also determine its local environment,” explains Johan Jacobsen, who performed the experiments as part of his thesis for the graduate programme in physics at the Niels Bohr Institute.
The experiments showed that the cement mixed with approx. 20 percent ash had good properties. The water the cement pores was bound to the ash and moved around less. This explains why the ash cement is stronger, can withstand higher pressure and will crumble less.
Potential for environmentally friendly ash cement
Cement typically takes a week to solidify. After one month, 70 percent of the process has been completed, but the process continues for many years. Ordinary cement is generally stronger during the first few months than the ash cement, but after a year the ash cement is stronger than the ordinary cement.
The Latest on: Environmentally friendly cement
- Green Roofs, Roof Meadows Becoming Popular In Philadelphia on May 22, 2019 at 3:33 pm
They’re seeing limited land space as an opportunity to be environmentally friendly. You might think of Philadelphia as a concrete jungle with all the parking garages, driveways, roads and ... […]
- Cement as a climate killer: Using industrial residues to produce carbon neutral alternatives on May 20, 2019 at 9:08 pm
However, the demand for cement continues to rise. A team of geoscientists from Martin Luther University Halle-Wittenberg (MLU) has found a way to produce more environmentally friendly and sustainable ... […]
- Geoscientists explore using industrial residues to manufacture environmentally friendlier cement on May 20, 2019 at 2:32 pm
Geoscientists from Martin Luther University Halle-Wittenberg (MLU) in Germany have discovered an environmentally friendly and sustainable alternative for producing cement. The team of researchers ... […]
- Cement as a climate killer: Using industrial waste to produce carbon neutral alternatives on May 20, 2019 at 7:25 am
However, the demand for cement continues to rise. A team of geoscientists from Martin Luther University Halle-Wittenberg (MLU) has found a way to produce more environmentally friendly and ... […]
- Local funeral directors weigh in on eco-friendly burials on May 19, 2019 at 1:03 pm
The concrete keeps the casket from caving in ... Some people may think of cremation as an eco-friendly method of final disposition, but it also has drawbacks. George Korsmo of Korsmo Funeral ... […]
- Concrete Block and Brick Manufacturing Market to Expand Due to Rising Construction Activities with 3.8% CAGR During 2017-2027 on May 17, 2019 at 5:50 am
Advent of advanced concrete materials and growing adoption of eco-friendly building materials are the biggest challenges in the global concrete block and brick manufacturing market. Nonetheless, ... […]
- Soil and wind-blown sand cement developed in China on May 17, 2019 at 1:23 am
Chinese researchers at Ximjiang Communications Construction Group Co Ltd claim to have developed a low-cost and environmentally-friendly cement with ingredients that include natural soil and ... […]
- Hawaii's DOT tests sustainable concrete on May 16, 2019 at 9:16 pm
But what I'm looking for is the savings on the cement versus the cost of the carbon so that it comes out even,so that it's neutral-and then your environmentally friendly," said Island Ready Mix's F.H. ... […]
- Community, Services and Environment Committee wrap up on May 14, 2019 at 10:24 pm
A 248 metre iconic concrete wall on Anglesea Street will soon get a makeover thanks to the Beyond Tomorrow Trust. At the Community, Services and Environment Committee ... Chair of the Hamilton Age ... […]
- The Global Market for Poly Concrete 2017-2025 - Rising Awareness for Eco-Friendly Construction Drives Market Growth - ResearchAndMarkets.com on May 14, 2019 at 5:18 am
DUBLIN--(Business Wire)--The "Poly Concrete Market: Global Industry Analysis, Trends, Market Size, and Forecasts up to 2025" report has been added to ResearchAndMarkets.com's offering. The report on ... […]
via Google News and Bing News