摘要
定量分析了木钙相对分子质量及含糖量对其有关性能的影响。结果表明:低相对分子质量的木钙引气量大,使混凝土强度降低;高相对分子质量的木钙作用持久,但缓凝时间过长;木钙含糖量越高,缓凝越严重。此外对不同树种的木钙讲行了混凝土试验,并介绍了使木钙高效化的改性途径。
Influences of relative molecular mass and sugar content of lignosulfo nate on its proper- ties are quantitatively analyzed. Results show that lignosulfo nate with low relative molecu- lar mass causes strength reduction of concrete by larger air entraining content and lignosulfo nate with high relative molecular mass makes a long period of retardation. High- er sugar content of lignosulfo nate causes more intense retardation. Lignosulfo nate pro- duced by different kinds of trees are tested, and modifying methods of lignosulfo nate are in- troduced too.
关键词
木钙
相对分子质量
含糖量
减水剂
改性方法
lignosulfonate
relative molecular mass
sugar content
kinds of trees
modifying method
