| Title |
Reactivity in cement pastes bearing fine fraction concrete and glass from construction and demolition waste: Microstructural analysis of viability |
| ID_Doc |
7891 |
| Authors |
Frías, M; Martínez-Ramírez, S; de la Villa, RV; Fernández-Carrasco, L; García, R |
| Title |
Reactivity in cement pastes bearing fine fraction concrete and glass from construction and demolition waste: Microstructural analysis of viability |
| Year |
2021 |
| Published |
|
| DOI |
10.1016/j.cemconres.2021.106531 |
| Abstract |
Converting construction and demolition waste (CDW) into secondary raw materials is one of the priorities of environmental policy and circular economy strategy. This study analysed the variation in eco-efficient paste reactivity with OPC replacement ratio (5% to 10%) and hydration time (2 d, 28 d and 90 d). Three types of CDW were explored: two (calcareous and siliceous) consisting of fine (<5 mm) concrete waste and one in laminated glass (<40 mm). Further to the mineralogical phases identified at the aforementioned percentages, the four materials, i.e., the three types of CDW-blended cements and the OPC reference, were similarly reactive. The primary hydration products, C-S-H gels, C4AH13 and C4AcH11, ettringite and portlandite, were the same as observed in OPC hydration. These findings attest to the scientific viability recycling such CDWs as mineral additions in eco-cement manufacture and consequently eliminating the need for stockpiling these materials at recycling/storage plants. |
| Author Keywords |
Construction and demolition waste; Eco-cements; Reactivity; Mineralogical phases; Viability |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000684541500009 |
| WoS Category |
Construction & Building Technology; Materials Science, Multidisciplinary |
| Research Area |
Construction & Building Technology; Materials Science |
| PDF |
https://doi.org/10.1016/j.cemconres.2021.106531
|