First Graphene Limited (ASX: FGR) reports that its studies of PureGRAPH graphene show that graphene admixtures increase strength, reduce materials usage and potentially increase longevity of cement grouts and concrete products.
Managing Director, Craig McGuckin, says this analysis is noteworthy as cement is estimated to amount to 6% of all CO2 emissions from human activity.
Cement is the most manufactured and traded product globally after water, which is causing enormous climate change challenges to reduce its carbon footprint.
In 2015, the total mass of cement produced was 4.6 billion tonnes. This is equivalent to about 626 kg per capita, a value higher than the amount of human food consumption.
With population growth, increased urbanisation and improved living standards of the global population, the demand for concrete products continues to grow at an accelerating rate.
The initial work demonstrates a low dosage of PureGRAPH generates an increase in compressive and tensile strengths, when compared to the base product,” Mr McGuckin said.
“While there is a considerable amount of further work to be done, this is very encouraging for enhancing the performance of concrete both new and recycled, but equally the sustainability benefits for the environment.”
Mr McGuckin said the use of graphene admixtures is showing improvements in strength, reduction in materials usage and durability of products. However, further studies are required to fully understand the mechanisms behind these results. Additionally, engagement with the construction industry is needed to ensure that graphene can be used as a viable, cost effective industry enhancement.
In a recent study, the company’s PureGRAPH graphene products were successfully investigated by the ARC Graphene Research Hub at the University of Adelaide.
The study, led by Professor Dusan Losic, assessed the influence of dosages and particle (platelets) size of PureGRAPH graphene on physicochemical, microstructural, and mechanical performance of Ordinary Portland Cement (OPC) cement mortars.
The results show the compressive strength increased by 34.3% and tensile strength by 26.9% when PureGRAPH® is added to cement mortar at very low levels of 0.07%w/w in the cement paste (equivalent to ca. 0.01%w/w in concrete), further validating earlier studies by Professor Losic.
