碱性和中性亚硫酸盐法制浆废液作水泥减水剂的研究

对AS-AQ法落叶松废液和NS-AQ法杨木浆废液按体积比1:4混合的混合液(M-L)作混凝土减水剂进行了研究,并与酸性亚硫酸盐法木浆废液(Ca-L)及亚硫酸氢镁法苇浆废液(Mg-L)做了比较.结果表明,以50%固体物含量的M-L作为混凝土减水剂,当废液用量为0.25%时,混凝土的静浆流动性为9.6cm,混凝土减水率11.2%,初凝时间7.08h;终凝时间为:10.25h,3d、7d、28d的抗压强度比分别为105%、99%、103%.而废液用量为0.5%时,各指标的对应值是:10.8cm,13.4%,9.50h,14.75h,108%、111%、105%.M-L的总体效果优于Ca-L和Mg-L.

Comprehensive Utilization of Alkaline and Neutral Sulfite Pulping Waste Liquor Using as the Waster-Reducing Admixture of Concrete

Mixed waste liquor (M-L) of aspen neutral sulfite-anthraquinone pulping waste liquor and larch alkaline sulfite-anthraquinone pulping waste liquor is used as water-reducing admixture which is compared with that made of wood acidic sulfite pulping waste liquor (Ca-L) and reed magnesium bisulphate pulping one (Mg-L) in this paper. The results indicate that using M-L (50% solid content) as the water-reducing admixture of concrete, the charge of M-L being 0.25%, the static deformation of concrete slurry: 9.6 cm, water reducing rate: 11.2%, initial setting time: 7h5 min, final setting time: 10h15min, compression strength ratio are 105%, 99% and 103% for 3 days, 7 days and 28 days respectively, and the charge being 0.5%, the corresponding values of each item are: 10.8 cm, 13.4%, 9h30min, 14h45min, 108% 111% and 105% respectively. The overall effect of using M-L as the water-reducing admixture of concrete is better than using Ca-L and Mg-L.