摘要
设计杠杆卧拉式混凝土徐变测定装置,并利用该装置测定早龄期混凝土在不同龄期的拉伸弹性模量、徐变以及拉伸强度,验证装置在测定混凝土早龄期徐变、弹性模量等参数的可行性。试验研究表明,采用该装置不仅可以测定混凝土的早龄期徐变、弹性模量,还具有不需要稳压装置保持测定荷载恒定不变的优点。研究表明,在相同条件下,进行了徐变测定的混凝土极限抗拉强度低于非徐变混凝土试件,加载龄期越早,极限抗拉强度降低幅度越大,证明了徐变对于混凝土的承载强度有一定的削弱作用。
The lever concrete creep device was designed and was used to measure the tensile elastic modulus of the early age con- crete creep and tensile strength. Meanwhile, the using of the device to test the parameters has been authenticated. Experiment shows that the usage of the device not only can determine the early age of concrete creep, elastic modulus, but also can maintain constant loads without stabilized device. Research shows that under the same conditions, the ultimate tensile strength of the con- crete which were measured creep should be lower than than that of non - creep of concrete . The earlier the loaded age, the grea- ter decreased of ultimate tensile strength. It indleats that the creep of concrete has a certain weakening effect on concrete bearing strength.
出处
《盐城工学院学报（自然科学版）》
CAS
2012年第3期11-15,共5页
Journal of Yancheng Institute of Technology:Natural Science Edition
关键词
混凝土
早龄期
徐变
试验
concrete
early age
creep
experiment
