caa a22 4500 463227123 CHVBK 20180405153230.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10853-006-0379-y doi (NATIONALLICENCE)springer-10.1007/s10853-006-0379-y Assessment of durability of recycled aggregate concrete produced by two-stage mixing approach [Elektronische Daten] [Vivian Tam, C. Tam] As more than 50% construction and demolition (C&D) wastes are composed of concrete debris in Hong Kong, recycling this debris into Recycled Aggregate (RA) for production of Recycled Aggregate Concrete (RAC) is an efficient way to alleviate the burden on landfill areas. Since RA is generated from concrete debris which has undergone years of services, the resulting RAC bears the weaknesses of lower density, higher water absorption, and higher porosity that limit them to lower-grade applications. Pinpointing to these weaknesses, Tam etal. [2005, Cement Concrete Res 35(6):1195-1203] developed the Two-Stage Mixing Approach (TSMA) for improving the strength of RAC, leading to the possibility in applying RAC for higher-grade applications. While the improvement in strength by TSMA has been proven in Tam etal.'s work [2005, Cement Concrete Res 35(6):1195-1203], the durability, in terms of deformation (shrinkage and creep) and permeability (water, air and chloride permeability), remains to be verified. In this paper, 0%, 20% and 100% of RA substitutions have been experimented to compare the durability performance of the Normal Mixing Approach (NMA) and the TSMA. Experiment results highlight that: (i) the higher the substitutions of RA, the weaker the performance of RAC; and (ii) the deformation and permeability of RAC can be enhanced when adopting TSMA. Therefore, it demonstrates that TSMA can help to improve the durability of RAC, on top of the previously verified strength improvement, and thus opening up wider applications of RAC. Springer Science+Business Media, LLC, 2007 Tam Vivian Griffith School of Engineering, Gold Coast Campus, Griffith University, PMB50 Gold Coast Mail Centre, 9726, Qld, Australia aut Tam C. Department of Building and Construction, City University of Hong Kong, Hong Kong, China aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/10(2007-05-01), 3592-3602 0022-2461 42:10<3592 2007 42 10853 https://doi.org/10.1007/s10853-006-0379-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0379-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tam Vivian Griffith School of Engineering, Gold Coast Campus, Griffith University, PMB50 Gold Coast Mail Centre, 9726, Qld, Australia aut NATIONALLICENCE 700 1- Tam C. Department of Building and Construction, City University of Hong Kong, Hong Kong, China aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/10(2007-05-01), 3592-3602 0022-2461 42:10<3592 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer