摘要
研究了兴安落叶松树皮栲胶废渣中木质素磺酸盐(LS)的混凝土应用性能、表面活性和分散性能。结果表明:树皮LS较木材LS具有更好的混凝土应用性能,且具有显著的表面活性,分散性能优越。其中,树皮LS对水泥的净浆流动度高于木材LS 98.1%,流动度损失在60 m in之后只有5.6%;起泡力比木材LS低46.4%;树皮LS 1%水溶液的表面张力为48.1 mN/m;树皮LS的CMC、σCMC分别为0.245%和54.5 mN/m。同时,比较了树皮LS与木材LS的结构特性。结果表明:树皮LS具有优良的应用性能是由于其具有较高的亲水基团含量,并且相对分子质量(Mr)分布比较均一。
The usages of bark lignosulfonate（LS） as concrete additive, surfactant and dispersant were studied. The results showed： bark LS had better performance than wood LS as additive in concrete, as surfactant and as dispersant, in which fluidity of cement paste using bark LS was 98.1% higher than that of wood LS, and drop of fluidity after 60 min was only 5.6 % ; foaming capacity was 46.4 % less than wood LS; surface tension at 1% was 48.1 mN/m; CMC and σCMC of bark LS were 0.245 % and 54.5 mN/m, respectively. Meanwhile, compared with wood LS on chemical structure characteristics, bark LS had higher content of hydrophilic groups and relatively narrower Mr distribution.
出处
《林产化学与工业》
EI
CAS
CSCD
2006年第3期59-62,共4页
Chemistry and Industry of Forest Products
关键词
树皮
木质素磺酸盐
栲胶废渣
bark residue
lignosulfonate
residue of tannin extracts
