Geri Dönüşüm Agregalı Betonların Erken Yaş Dayanımlarını Tahmin Eden Matematiksel Modellerin Geliştirilmesi

Abstract

Bu çalışmanın amacı farklı oranlarda geri dönüşümlü beton agregası kullanılarak üretilen betonların erken yaş beton basınç dayanımlarını yüksek doğrulukla tahmin eden matematiksel model geliştirmektir. Bu amaçla toplamda 18 farklı beton serisi üretilmiş ve bu serilerin 1 ve 3 günlük beton basınç dayanımı değerlerinden faydalanılarak tepki yüzeyi metodu üzerinde istatistik analizleri yapılmıştır. Yapılan analizler sonucunda fc,1 gün ve fc,3 gün için matematiksel model geliştirilmiştir. Geliştirilen modelin belirlilik katsayılarının 0.99 olması bu modelin yüksek doğruluklu ve etkin bir şekilde kullanılabileceğini göstermiştir. Bu model yardımıyla erken yaş beton basınç dayanımı pratik ve yüksek doğruluklu bir şekilde belirlenebilmektedir. Böylece bu modelin kullanımının zaman ve maliyet açısından önemli faydalar sağlayacağı düşünülmektedir.

Keywords

• İnşaat ve yıkıntı atıkları
• geri dönüşümlü beton agregaları
• tepki yüzeyi metodu
• matematiksel modeller
• erken yaş beton basınç dayanımı

Development of Mathematical Models Predicting Early-Age Strength of Recycled Aggregate Concretes

Abstract

This study aims to develop a mathematical model that with high accuracy predicts the early-age concrete compressive strength of concretes produced using recycled concrete aggregate in different ratios. For this purpose, 18 different concrete series were produced, and statistical analyses were made on the response surface method using these series' 1- and 3-day concrete compressive strength values. As a result of the analysis, the mathematical model was developed for fc,1 day, and fc,3 days. The coefficient of determination belonging to the developed model is 0.99, which shows that this model can be used with high accuracy and efficiency. Using this model, the compressive strength of early-age concrete can be determined practically and with high accuracy. Thus, it is thought that using this model will provide significant benefits in terms of time and cost.

Keywords

• Construction and demolition waste
• recycled concrete aggregate
• response surface method
• mathematical models
• early-age concrete compressive strength

References

1. Alyamac, K.E., Ghafari, E., Ince, R., 2017. Development of eco-efficient self-compacting concrete with waste marble powder using the response surface method. J. Clean. Prod. 144, 192–202. https://doi.org/https://doi.org/10.1016/j.jclepro.2016.12.156
2. Braga, A.M., Silvestre, J.D., de Brito, J., 2017. Compared environmental and economic impact from cradle to gate of concrete with natural and recycled coarse aggregates. J. Clean. Prod. 162, 529–543. https://doi.org/https://doi.org/10.1016/j.jclepro.2017.06.057
3. Demir, T., Ulucan, M., Alyamac, K.E., 2022. Determination of the Early Age Strength of High-Strength Concrete Using RSM Method. Fırat Univ. J. Eng. Sci. 34, 105–114. https://doi.org/10.35234/fumbd.972829
4. Demirel, B., Gultekin, E., Alyamac, K.E., 2019. Performance of structural lightweight concrete containing metakaolin after elevated temperature. KSCE J. Civ. Eng. 23, 2997–3004. https://doi.org/10.1007/s12205-019-1192-x
5. Guo, Z., Tu, A., Chen, C., Lehman, D.E., 2018. Mechanical properties, durability, and life-cycle assessment of concrete building blocks incorporating recycled concrete aggregates. J. Clean. Prod. 199, 136–149. https://doi.org/10.1016/j.jclepro.2018.07.069
6. Marinković, S., Radonjanin, V., Malešev, M., Ignjatović, I., 2010. Comparative environmental assessment of natural and recycled aggregate concrete. Waste Manag. 30, 2255–2264. https://doi.org/10.1016/j.wasman.2010.04.012
7. Omary, S., Ghorbel, E., Wardeh, G., 2016. Relationships between recycled concrete aggregates characteristics and recycled aggregates concretes properties. Constr. Build. Mater. 108, 163–174. https://doi.org/10.1016/j.conbuildmat.2016.01.042
8. Pereira, P., Evangelista, L., De Brito, J., 2012. The effect of superplasticisers on the workability and compressive strength of concrete made with fine recycled concrete aggregates. Constr. Build. Mater. 28, 722–729. https://doi.org/10.1016/j.conbuildmat.2011.10.050

9. Serres, N., Braymand, S., Feugeas, F., 2016. Environmental evaluation of concrete made from recycled concrete aggregate implementing life cycle assessment. J. Build. Eng. 5, 24–33. https://doi.org/10.1016/j.jobe.2015.11.004
10. Ulucan, M., Alyamac, K.E., 2022a. A holistic assessment of the use of emerging recycled concrete aggregates after a destructive earthquake: Mechanical, economic and environmental. Waste Manag. 146, 53–65. https://doi.org/10.1016/j.wasman.2022.04.045 , Ulucan, M., Alyamac, K.E., 2022b. An integrative approach of the use of recycled concrete aggregate in high-rise buildings: Example of the Elysium. Struct. Concr. https://doi.org/10.1002/suco.202200512 Wang, L., Wang, J., Qian, X., Chen, P., Xu, Y., Guo, J., 2017. An environmentally friendly method to improve the quality of recycled concrete aggregates. Constr. Build. Mater. 144, 432–441. https://doi.org/10.1016/j.conbuildmat.2017.03.191
11. Wijayasundara, M., Mendis, P., Crawford, R.H., 2018. Integrated assessment of the use of recycled concrete aggregate replacing natural aggregate in structural concrete. J. Clean. Prod. 174, 591–604. https://doi.org/10.1016/j.jclepro.2017.10.301