外掺MgO水泥基材料压蒸膨胀变形的试验研究

Study on autoclave-treated expansibility of cement-based materials mixed with magnesium oxide

为了进一步探索水工混凝土中MgO极限掺量的确定方法,进行了外掺MgO水泥净浆、水泥砂浆和一级配混凝土的压蒸试验。试验结果表明,与水泥净浆相比,利用水泥砂浆和一级配混凝土作为压蒸试件均可提高混凝土中MgO的极限掺量,但利用水泥砂浆作为压蒸试件来确定MgO的极限掺量更加科学合理。

Searching for a kind of method to determine the most contents of magnesium oxide （ MgO ） in hydraulic concrete, The auto- clave tests of cement paste ,cement mortar and one grading concrete mixed respectively with MgO were done.The test results show that cement mortar specimen and one grading concrete specimen can increase the most contents of MgO in concrete.But the cement mortar specimen is more scientific and reasonable comparing with the one grading concrete specimen.