掺合料对硫铝酸盐水泥基混凝土耐久性影响的研究  

Research of durability of sulphoaluminate cement based concrete with mineral admixture

作　　者：张云飞[1] 张德成[1] 刘鹏[1] 轩红钟[1] 程新[1] 

机构地区：[1]济南大学材料学院,山东济南250022

出　　处：《水泥》2007年第10期16-18,共3页Cement

基　　金：山东省基金资助项目(03BS060)

摘　　要：研究了掺合料复掺(矿渣∶粉煤灰=2∶1)、单掺矿渣、单掺粉煤灰对硫铝酸盐水泥基混凝土强度、抗渗性、抗冻性的影响,并与相同水灰比下掺合料复掺对普通硅酸盐水泥基混凝土对应性能的影响进行对比。结果表明:在硫铝酸盐水泥基混凝土中,掺合料的加入使混凝土的早期和后期强度都明显降低,抗渗性稍微降低,抗冻性明显降低,且掺量越高,其强度、抗渗性、抗冻性降低越明显;但复掺时的效果比单掺时的效果好,粉煤灰的效果最差;而在普通硅酸盐水泥基混凝土中,掺合料的加入使混凝土的早期强度降低,但后期强度超过空白样的强度,抗渗性、抗冻性明显提高,但是,在无掺合料时其抗渗性、抗冻性大大低于相同水灰比下硫铝酸盐水泥基混凝土的抗渗性、抗冻性。The influence of some admixtures, such as composite admixture （the ratio of slag and fly ash was 2：1）, slag, and fly ash to the compressive strength, impermeability, and frost-resistance ability of sulphoaluminate cement based concrete was studied, and consequently compared with their influence on the same properties of Portland cement based concrete. The results showed that early and later compressive strength of concrete decreased substantially, the impermeability reduced slightly and the frost-resistance ability reduced quite obviously when mineral admixtures were added to the sulphoaluminate cement based concrete, and those effect was more drastic with more additives; and it had to be noted that the fly ash could be the worst admixture and the composite admixture might be the best one if regarding on the durability of these type of concrete. But, early compressive strength of concrete decreased, later compressive strength of concrete increased, the impermeability and the frost-resistance ability increased quite obviously while mineral admixtures were added to Portland cement based concrete; on the other hand, compressive strength, the impermeability and the frost-resistance ability of Portland cement based concrete without of any admixture were less than those of sulphoaluminate cement based concrete if the same W/C ratio was kept.

关 键 词：硫铝酸盐水泥 混凝土 抗渗性 抗冻性 

分 类 号：TQ172.7[化学工程—水泥工业]