| Autor: |
Pradhan, Shashwati Soumya, Pramanik, Subhadip, Mishra, Umesh, Biswal, Sushant Kumar, Thapa, Sheetal |
| Předmět: |
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| Zdroj: |
Russian Journal of Nondestructive Testing; Jul2023, Vol. 59 Issue 7, p767-784, 18p |
| Abstrakt: |
The cement industries and current construction practices are highly incompatible with sustainability due to their high energy consumption and reliance on natural resources. As the industrial sectors expand rapidly in emerging countries, so does the need for waste management services. Sustainable alkali activated concrete (AAC) can be produced using the waste industrial by-products as a binder. These methods will reduce the carbon footprint of cement industries by solving the problem of industrial waste disposal. The feasibility of utilizing agricultural wastes such as rice husk ash (RHA) as a partial substitute from 0 to 40% for ground granulated blast furnace slag (GGBS) was investigated using 10M and 12 M sodium hydroxide solution to produce AAC. The destructive tests, such as compressive, split tensile, flexural strength and non-destructive tests, such as ultrasonic pulse velocity, dynamic modulus of elasticity and rebound hammer tests, were carried out to evaluate the mechanical strength of AAC. A regression model was developed with the help of both artificial neural networks (ANN) and multiple regression analysis to predict the compressive strength from non-destructive tests. The model generated using an optimum ANN provided good results. The outcomes of this study indicate that the substitution of 10% RHA increases the strength of AAC and then decreases. The study included a comparative study with other earlier studies and the obtained results emphasized the need to use AAC based GGBS-RHA. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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