TY - GEN
T1 - Combined influence of expansive and shrinkage reducing admixtures on the shrinkage behavior of ultra-high performance concrete
AU - Park, Jung Jun
AU - Yoo, Doo Yeol
AU - Kim, Sung Woo
AU - Yoon, Young Soo
PY - 2012
Y1 - 2012
N2 - Since ultra-high performance cementitious composite (UHPCC) exhibits remarkable compressive strength and ductility, its application for structural member provides significant reduction of the section. The use of low water-to-binder ratio and admixtures with high fineness induce large shrinkage strain, leading to the possibility of large occurrence of shrinkage cracks due to the restraints of the form and reinforcing bars. Therefore, this study admixes a combination of expansive and shrinkage reducing agents as a solution to reduce the shrinkage of UHPCC. The eventual appropriateness is computed to evaluate the free shrinkage and restrained shrinkage behaviors. From the test results, the admixing of a combination of expansive and shrinkage reducing agents is seen to achieve a reduction of the free shrinkage by 30% to 50% at 28 days and a reduction of the strain of the external steel by about 19%.
AB - Since ultra-high performance cementitious composite (UHPCC) exhibits remarkable compressive strength and ductility, its application for structural member provides significant reduction of the section. The use of low water-to-binder ratio and admixtures with high fineness induce large shrinkage strain, leading to the possibility of large occurrence of shrinkage cracks due to the restraints of the form and reinforcing bars. Therefore, this study admixes a combination of expansive and shrinkage reducing agents as a solution to reduce the shrinkage of UHPCC. The eventual appropriateness is computed to evaluate the free shrinkage and restrained shrinkage behaviors. From the test results, the admixing of a combination of expansive and shrinkage reducing agents is seen to achieve a reduction of the free shrinkage by 30% to 50% at 28 days and a reduction of the strain of the external steel by about 19%.
UR - http://www.scopus.com/inward/record.url?scp=80053965368&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053965368&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.488-489.242
DO - 10.4028/www.scientific.net/KEM.488-489.242
M3 - Conference contribution
AN - SCOPUS:80053965368
SN - 9783037852187
T3 - Key Engineering Materials
SP - 242
EP - 245
BT - Advances in Fracture and Damage Mechanics X
PB - Trans Tech Publications Ltd
T2 - 10th International Conference on Fracture and Damage Mechanics, FDM2011
Y2 - 19 September 2011 through 21 September 2011
ER -