Study on Properties of Waste Concrete Powder by Thermal Treatment and Application in Mortar
Source abstract
Abstract
Waste concrete must be crushed, screened, and ground in order to produce high-quality recycled aggregate. In this treatment process, 15–30% waste concrete powder (<0.125 mm) can be generated. Hydration activity and the reuse of waste concrete powders (WCPs) were studied in this work, and the results illustrated that the particle size changed after a series of thermal treatments at temperatures from 400 ℃ to 800 ℃. The particle size of waste concrete powder decreased by 700 ℃ thermal treatment, and by 600 ℃ thermal treatment, it increased. More active elements appeared in WCP heated by 800 ℃. Nevertheless, the activity index (AI) of WCP, measured by the ratio of mechanical strengths between mortar with a 30% replacement of the cement with WCP and normal mortar without WCP, indicated that the WCP by 700 ℃ thermal treatment had an optimal AI value, which meant WCP treated at 700 ℃ could be used in mortar or concrete as an admixture.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Recycled Aggregate Concrete Performance · Concrete and Cement Materials Research · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China
Collaborative Innovation Center of green building of Shandong Province, Jinan 250101, China
References (27)
Show source-provided references
1. Linss, E. (2008). Untersuchungen zur Leistung Schallimpulszerkleinerung fuer die selective Aufbereitung von Beton. [Master’s Thesis, Bauhaus-Universität Weimar].
2. Carbonation of concrete with construction and demolition waste based recycled aggregates and cement with recycled content10.1016/j.conbuildmat.2019.117336 ↗
3. Advanced techniques for the study of shrinkage-induced cracking of concrete with recycled aggregates at early age10.1016/j.conbuildmat.2019.117340 ↗
4. Development of thermo-mechanical treatment for recycling of used concrete10.1617/s11527-012-9852-z ↗
5. Effects of carbonated hardened cement paste powder on hydrationand microstructure of Portland cement10.1016/j.conbuildmat.2018.07.159 ↗
6. Comparison of recycled aggregate treatment methods on the performance for recycled concrete10.1016/j.conbuildmat.2019.117366 ↗
7. Recycled cement10.1016/j.conbuildmat.2018.09.181 ↗
8. Rehydration activity of hydrated cement paste exposed to high temperature10.1002/fam.1067 ↗
9. Cementitious characteristics of hydrated cement paste subjected to various dehydration temperatures10.1016/j.conbuildmat.2007.10.016 ↗
10. Splittgerber, F., and Mueller, A. (2001). Identification of the Type of Cement in Hardened Concrete and Mortars. International Conference on Construction Hong Kong 2001, Institution of Civil Engineers. Conference Proceeding Volume One.
11. Farzam, H., Bolin, G., Hove, R.H., Marin, J., Erlin, B.J., Isabelle, H.L., Mather., B., Gibbe, F.K., Kaetzel, H.L., and Meseguer, A.G. (2000). Cement and Concrete Terminology Reported by ACI Committee 116, American Concrete Institute.
12. Selected physical properties of concrete modified using mineral powders10.1016/j.proeng.2017.02.097 ↗
13. JG/T 486 (2016). Compound Mineral Admixtures for Concrete, Ministry of Housing and Urban-Rural Construction of the People’s Republic of China. (In Chinese).
14. Utilization of waste glass powder in the production of cement and concrete10.1016/j.conbuildmat.2016.08.016 ↗
15. Comparison of test methods to assess pozzolanic activity10.1016/j.cemconcomp.2009.10.008 ↗
16. BS EN 196-5:2011 (2011). Methods of Testing Cement-Part 5: Pozzolanicity Test for Pozzolanic Cement, British Standards Institution.
17. Utilization of waste concrete powder as a substitution material for cement10.1016/j.conbuildmat.2011.11.042 ↗
18. Cement substitution by a recycled cement paste fine: Role of the residual anhydrous clinker10.1016/j.conbuildmat.2016.11.080 ↗
19. Investigation of using recycled powder from waste of clay bricks and cement solids in reactive powder concrete10.1016/j.conbuildmat.2016.03.040 ↗
20. Schneider, U., and Herbst, H.-J. (1989). Permeabilitaet und Porositaet von Beton bei hohen Temperaturen. Deutscher Ausschuss fuer Stahlbeton, Beuth Verlag GmbH.
21. Schneider, U. (1982). Verhalten von Beton bei hohen Temperaturen. Deutscher Ausschuss fuer Stahlbeton, Verlag von Wilhelm & Sohn.
22. Wolf, G. (2004). Untersuchung Ueber das Temperaturverhalten eines Tunnelbetons mit spezieller Gesteinskoenung. [Master’s Thesis, Technische Universitaet Wien].
23. GB/T17671 (1999). Method of Testing Cements-Determination of Strength, Chinese national bureau of quality supervision.
24. GB/T 21372 (2008). Portland Cement Clinker, Chinese National Bureau of Quality Supervision.
25. Dora, B. (2001). Hydraulisch Erhaertende Baustoffe Aus Betonbrechsand, Phasenaenderung Durch Temperaturebehandlung Und Einsatzmoeglichkeit. Master’s Thesis, TU Braunschweig.
26. Investigation of the structure of heated Portland cement paste by using various techniques10.1016/j.conbuildmat.2012.09.071 ↗
27. Understanding the Filler Effect on the Nucleation and Growth of C-S-H10.1111/jace.13177 ↗