Experimental studies on mechanical properties of green
super high strength concrete used stonechip filled
with steel tubes
力学性能
; 低碳超高性能石渣混凝土; 钢管约束超高强石渣混凝土
; 延性; 破坏机理mechanical properties
; green super highstrength concrete used stonechip (abbreviated to
GSHSCUS)
; GSHSCUS filled with steel tubes column;ductility
; mechanism of failure of the specimens低碳超高强石渣混凝土是作者利用地方原材料自主研发的强
度达到137.3MPa的新型环境友好型混凝土.本文通过14个试件的轴
心抗压试验,考察并分析了钢管约束超高强石渣混凝土的破坏形态,
研究了影响核心混凝土强度增长率的因素和规律.试验结果表明:
钢管内填充低碳超高强石渣混凝土可以解决由于自收缩偏大引起的
钢管混凝土脱空的问题;在试验参数范围内,钢管约束超高强石渣混
凝土的强度增长率与套箍指标成正比;低碳超高强石渣混凝土用钢
管约束后脆性性能得到显著的改善,位移延性系数达到6.5~26.3;所
有的试件都是因为剪切而破坏,同时对其破坏机理进行了分析.
Green super high strength concrete used stone
chip (abbreviated to GSHSCUS) is a new kind of
environmentally friendly concrete with the strength
being as high as 137.3 MPa, which were developed by the
authors with the local materials. Based on the
experimental studies of 14 specimens, this paper
describes the failure mode of GSHSCUS filled with steel
tubes, and try to discover the general regularity. It
was found that it is possible for us to deal with
disengaging due to selfshrinkage at interface of steel
tubeconfined concrete by filling GSHSCUS ,and
experiment results show that within the factor scope of
this test, the strength growth rate of GSHSCUS filled
with steel tubes is almost proportional to the
confinement index of the specimens, and that all
specimens exhibits excellent ductility, and shear
failure. Also analyzed is the mechanism of failure of
the specimens.
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收稿日期:20101006基金项目:福建省自然科学
基金计划资助项目(基金项目编号:2007J0163);莆田市科技计划资
助项目(2007G26)作者简介:陈国灿(1963),男,福建仙游人,副教授
,高级工程师.研究方向:低碳超高强混凝土的研发与应用研究.