TY - JOUR
T1 - Initial moisture and mixing effects on higher quality recycled coarse aggregate concrete
AU - Brand, Alexander S.
AU - Roesler, Jeffery R.
AU - Salas, Andres
N1 - Acknowledgement is given to the support from the Center of Excellence for Airport Technology ( CEAT ) at the University of Illinois at Urbana-Champaign (UIUC) provided by the O’Hare Modernization Program (OMP) and the City of Chicago. The authors would also like to thank Rossi Contractors, Inc., for the crushed concrete aggregates provided for the laboratory study and Mr. Ross Anderson of Bowman and Barrett, Inc., of Chicago, Illinois. Additional acknowledgement is given to UIUC students Catalina Arboleda and Ryan Smith.
PY - 2015/3/15
Y1 - 2015/3/15
N2 - Higher quality recycled concrete aggregates (RCA) were used as coarse aggregates in a concrete mixture. The initial aggregate moisture condition (oven dry, partially saturated, fully saturated) and mixing method (normal, two-stage) were assessed in order to limit the differences between concrete containing RCA and virgin aggregates. Concrete with partially-saturated RCA using two-stage mixing was beneficial for improving the compressive and split tensile strengths. For this material, the mixing method did not affect the concrete free drying shrinkage at any age. Overall, the two-stage mixing method increased the concrete workability and could potentially improve the concrete strength properties, particularly when the RCA is partially saturated.
AB - Higher quality recycled concrete aggregates (RCA) were used as coarse aggregates in a concrete mixture. The initial aggregate moisture condition (oven dry, partially saturated, fully saturated) and mixing method (normal, two-stage) were assessed in order to limit the differences between concrete containing RCA and virgin aggregates. Concrete with partially-saturated RCA using two-stage mixing was beneficial for improving the compressive and split tensile strengths. For this material, the mixing method did not affect the concrete free drying shrinkage at any age. Overall, the two-stage mixing method increased the concrete workability and could potentially improve the concrete strength properties, particularly when the RCA is partially saturated.
KW - Aggregate moisture condition
KW - Recycled aggregate concrete Strength
KW - Recycled concrete aggregate
KW - Shrinkage
KW - Two-stage mixing approach
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U2 - 10.1016/j.conbuildmat.2015.01.047
DO - 10.1016/j.conbuildmat.2015.01.047
M3 - Article
AN - SCOPUS:84921477929
SN - 0950-0618
VL - 79
SP - 83
EP - 89
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -