TY - JOUR
T1 - Strength and expansive stresses of concrete with MgO-type expansive agent under restrain conditions
AU - Li, Yan Bo
AU - Deng, Min
AU - Mo, Li Wu
AU - Tang, Ming Shu
PY - 2012/8
Y1 - 2012/8
N2 - Free expansion, three-direction expansion stresses and strength of concrete under restraints were investigated. Results indicate that free expansions of concrete with 0%, 5%, 8% and 12%(by mass) MgO are -33 × 10-6, 90 × 10-6, 230 × 10-6 and 320 × 10-6 at 560 d. The strength of concrete with MgO restrained in three-dimension is higher than that restrained in two-dimension, the latter is higher than that of concrete unrestrained. Under the three-dimensional restraints, the expansive stresses of concrete increase with increase of MgO-type expansive agent. What is more, the specimen size has an obvious effect on the expansive stresses of concrete: pc,x > pc,z > pc,y. With the increase of curing age, the expansive stresses tend to be stable in the experiment.
AB - Free expansion, three-direction expansion stresses and strength of concrete under restraints were investigated. Results indicate that free expansions of concrete with 0%, 5%, 8% and 12%(by mass) MgO are -33 × 10-6, 90 × 10-6, 230 × 10-6 and 320 × 10-6 at 560 d. The strength of concrete with MgO restrained in three-dimension is higher than that restrained in two-dimension, the latter is higher than that of concrete unrestrained. Under the three-dimensional restraints, the expansive stresses of concrete increase with increase of MgO-type expansive agent. What is more, the specimen size has an obvious effect on the expansive stresses of concrete: pc,x > pc,z > pc,y. With the increase of curing age, the expansive stresses tend to be stable in the experiment.
KW - Compressive strength
KW - Concrete with MgO-type expansive agent
KW - Expansion
KW - Expansive stress
KW - Restrain condition
UR - http://www.scopus.com/inward/record.url?scp=84871098148&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1007-9629.2012.04.002
DO - 10.3969/j.issn.1007-9629.2012.04.002
M3 - 文章
AN - SCOPUS:84871098148
SN - 1007-9629
VL - 15
SP - 446
EP - 450
JO - Jianzhu Cailiao Xuebao/Journal of Building Materials
JF - Jianzhu Cailiao Xuebao/Journal of Building Materials
IS - 4
ER -