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Development of Scale to Predict Effect of Three Alkali Activated Solution on Compressive Strength and Microstructure of Geopolymer Based Fly Ash |
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| รหัสดีโอไอ | |
| Creator | Rattapon Somna |
| Title | Development of Scale to Predict Effect of Three Alkali Activated Solution on Compressive Strength and Microstructure of Geopolymer Based Fly Ash |
| Contributor | Teerapon Saowapun, Chawakarn Piladram, Nitichai Ketpan, Suksit Sornram, Kiatsuda Somna |
| Publisher | Environmental Engineering Association of Thailand |
| Publication Year | 2564 |
| Journal Title | Thai Environmental Engineering Journal (TEEJ) |
| Journal Vol. | 35 |
| Journal No. | 2 |
| Page no. | 39-46 |
| Keyword | Geopolymer, compressive strength, predict equation |
| URL Website | https://so05.tci-thaijo.org/index.php/teej |
| Website title | Thai Environmental Engineering Journal (TEEJ) |
| ISSN | 2673-0359 |
| Abstract | This research aimed to develop a scale to predict the effect of alkali-activated solution on compressive strength and microstructure of geopolymer based fly ash. The starting material for geopolymersynthesis was fly ashobtained from Mea Moh electricity thermal power plant. Sodium hydroxide 10M, sodium silicate solution and calcium hydroxide solution were used as alkali-activated solutionsfor geopolymer. The proportions of alkali-activated in the geopolymer mixture were calculated by simplex lattice design. The compressive strength of geopolymer was investigated at the age of 7, 14 and 28 days. The surface area of thegeopolymersamples was characterized by OM technic. The results of compressive strength were input into a Minitab program to construct the scale for predicting and plotting the mixture contour. The results showed that the compressive strength of geopolymer had a range between 0 and 200 ksc. Using sodium hydroxide andsodium silicate solutionto be alkali activated solution for geopolymerprovided the highest compressivestrength. It is worth mentioning that sodium hydroxide is a strong alkali hydroxide which dissolved Si and Al from fly ash; additionally, geopolymer could also be formed from free silica in the sodium silicate solution. On the other hand, geopolymer synthesized with calcium hydroxide solution presented the lowest compressive strength due to the solution being a less strong alkaline to dissolve Si and Alfrom fly ash. The equation for predicting the compressive strength in ksc of geopolymer with three alkali-activated solutions is Y = 202.49NH-.63NS+43.20CH+461.24(NH*NS)-61.81(NH*CH)+559.15(NS*CH)+45.98(NH*NS*CH) where Y is compressive strength of geopolymer in ksc. |
