AI Article Synopsis
- The paper investigates the microstructure of concrete using recycled aggregates (RA) sourced from construction and demolition waste in Portugal.
- It employs scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) to assess how different locations of RA collection affect concrete mix characteristics.
- Results indicate that the nature of the RA significantly influences the bond strength with cement paste, and using RA increases the porosity of the mixes.
Article Abstract
This paper intends to analyze the microstructure of concrete with recycled aggregates (RA) from construction and demolition waste from various Portuguese recycling plants. To that effect, several scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analyses were performed. Various concrete mixes were evaluated in order to analyze the influence of the RA's collection point and consequently of their composition on the mixes' characteristics. Afterward all the mixes were subjected to the capillary water absorption test in order to quantitatively evaluate their porosity. Results from the SEM/EDS analysis were compared with those from capillary water absorption test. The SEM/EDS analysis showed that the bond capacity of aggregates to the new cement paste is greatly influenced by the RA's nature. On the other hand, there was an increase in porosity with the incorporation of RA.
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| http://dx.doi.org/10.1017/S1431927615015512 | DOI Listing |
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