I found recent papers in the literature with extremely encouraging results especially in terms of mechanical performance.
Hi valeria,
Yes, I´ve just tested it with an air lime (for finishing wall coats) and with a natural hydraulic lime mortar.
Best wishes,
Paulina
Hi valeria,
Yes, I´ve just tested it with an air lime (for finishing wall coats) and with a natural hydraulic lime mortar.
Best wishes,
Paulina
Hi all,
I've never used graphen oxides. But I'l be interested in the results and the potential.
All the Best
MB
Hi valeria,
I used carbon and graphite products to produce conductive concrete. I was able to improve the electrical conductivity while maintaining required mechanical properties for concrete bridge deck. So, what is your goal of using graphene oxide.
Yehia, S., Tuan, C. Y., Ferdon, D., and Chen, B., “Conductive Concrete Overlay for Bridge Deck Deicing: Mix Design, Optimization, and Properties,“ ACI Materials Journal, Vol. 97, No. 2, March – April 2000, pp. 172-181.
Tuan, C. Y., and Yehia, S. A., “Evaluation of Electrically Conductive Concrete Containing Carbon Products for Deicing,” ACI Materials Journal, Vol. 101, No.4, July-August 2004, pp. 287-293.
Yehia, S., Qaddoumi, N., Hassan M., and Swaked, B., “Conductive Concrete for Electromagnetic Shielding Applications,” Advances in Civil Engineering Materials, ASTM, 3, no. 1 (2014): 270-290. doi: 10.1520/ACEM20130107, May 2014.
Hi Valeria,
Unfortunatly I can't help you because I've never worked with graphen oxides...
All the best,
Aires
Hi Valéria
I 'll worked with clay (maghnite) with different oxides but not with graphen.
Best Regards
Mohammed
Thank-you very much to you for your help, especially to Sherif Yehia.
My first goal would be the enhancment of mechanical strength, especially tensile strength. Also its influence on cement paste rheology can be an attractive issue. However, also the effect of graphene on other functional properties such as electrical and thermal conductivity (as S. Yehia mentioned) can be interesting for specific applications.
My first goal would be the enhancment of mechanical strength, especially tensile strength. Also its influence on cement paste rheology can be an attractive issue. However, also the effect of graphene on other functional properties such as electrical and thermal conductivity (as S. Yehia mentioned) can be interesting for specific applications.
Hi Valeria,
A few years ago at NIST, we compared mortars with and without grapheme oxide additions. We were hoping to see a decrease in chloride ion penetration, but both mortars exhibited the same behavior. We saw a slight increase (7 %) in compressive strength in the mortars with the graphene oxide at 1 d (as it amplified early age hydration according to calorimetry measurements), with a similar strength (2 % less) at 7 d, 28 d, and 112 d, but did not measure tensile strength.
Best regards,
Dale
Dear Valeria, we investigated many cement based composites with chemical and mineral admixtures and with recycled and waste materials, but never with graphene oxide.
Best regards,
Dear Valeria,
One of our current works is the development of microwave absorbing cement-expanded graphite based composite materials. The results are very promising.
Best regards
I found recent papers in the literature with encouraging results.
yes please see our paper
- https://www.researchgate.net/profile/Ahmed_Moosa ,Mechanical Properties of Prepared Graphene Oxide in Concrete Nanocomposites , Ahmed Moosa
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