Self-compacting geopolymer concrete-a review

14th International Conference on Science, Engineering and Technology

自然科学;工业技术

Praveen, P. Ukesh^1 ; Srinivasan, K.^1

Department of Structural and Geo-Technical Engineering, School of Civil and Chemical Engineering, VIT University, Vellore

Tamil Nadu

632014, India^1

关键词: Alkaline solutions;    Compressive strength of concrete;    Curing temperature;    Geopolymer concrete;    Industrial by-products;    Low compressive strengths;    Ordinary Portland cement;    Potassium silicates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/263/3/032024/pdf
DOI  :  10.1088/1757-899X/263/3/032024

来源: IOP

【 摘 要 】

In this construction world, Geopolymer concrete is a special concrete which doesn't requires the Ordinary Portland Cement and also reduces the emission of carbon-dioxide. The Geopolymer Concrete is made up of industrial by-products (which contains more Silica and Alumina) and activated with the help of Alkaline solution (combination of sodium hydroxide & sodium silicate or potassium hydroxide & potassium silicate). The high viscosity nature of Geopolymer Concrete had the ability to fail due to lack of compaction. In improvising the issue, Self Compacting Geopolymer Concrete has been introduced. The SCGC doesn't require any additional compaction it will flow and compacted by its own weight. This concrete is made up of industrial by-products like Fly ash, GGBFS and Silica Fume and activated with alkaline solution. The earlier research was mostly on Fly ash based SCGC. In few research works Fly ash was partially replaced with GGBS and Silica Fume. They evaluated the compressive strength of concrete with varying molarities of NaOH; curing time and curing temperature. The flexural behaviour of the concrete also examined. The Fly ash based SCGC was got high compressive strength in heat curing as well as low compressive strength in ambient curing. The presence of GGBS improves the strength in ambient curing. For aiming the high strength in ambient curing Fly ash will be completely replace and examine with different mineral admixtures.