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首页> 外文期刊>Journal of Wood Chemistry and Technology >PERFORMANCE OF SOFTWOOD SODA-ANTHRAQUINONE LIGNIN-POLYETHYLENE GLYCOL DERIVATIVES AS WATER-REDUCING ADMIXTURE FOR CONCRETE
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PERFORMANCE OF SOFTWOOD SODA-ANTHRAQUINONE LIGNIN-POLYETHYLENE GLYCOL DERIVATIVES AS WATER-REDUCING ADMIXTURE FOR CONCRETE

机译：针叶木苏打-蒽醌类木质素-聚乙烯醇乙二醇衍生物作为混凝土减水剂的性能

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摘要

We have developed a high-performance lignin-based water-reducing admixture. In this study, softwood soda-anthraquinone lignin was modified with mono-epoxide polyethylene glycols having chain lengths of 10, 25, and 50 mol (the number of repeating units of ethylene oxide). The mortar flow and concrete slump flow tests were used to investigate the performance of the lignin derivatives as a water-reducing admixture. All tested lignin-PEG derivatives performed considerably better than a commercial lignosulfonate water-reducing admixture in the mortar flow test. In particular, the derivative with a PEG chain length of 50 mol performed excellently in both tests. The optimum PEG content for mortar dispersion was approximately 40% for lignin derivatives with a PEG chain length of 50 mol; this content exhibited a dispersing effect that was four times higher than that of the lignosulfonate water-reducing admixture. The strength of concrete containing the lignin derivatives was almost the same strength as that of concrete containing the commercial lignosulfonate water-reducing admixture.
机译：我们开发了一种高性能的木质素减水剂。在这项研究中，用链长为10、25和50摩尔（环氧乙烷的重复单元数）的单环氧聚乙二醇修饰软木苏打-蒽醌木质素。砂浆流动和混凝土坍落度流动试验用于研究木质素衍生物作为减水剂的性能。在砂浆流动试验中，所有测试的木质素-PEG衍生物的性能均比市售木质素磺酸减水混合物好得多。尤其是，PEG链长为50mol的衍生物在两种测试中均表现出色。对于具有50 mol PEG链长的木质素衍生物，砂浆分散的最佳PEG含量约为40％。该含量表现出的分散效果是木质素磺酸盐减水混合物的四倍。含有木质素衍生物的混凝土的强度几乎与含有商业木质素磺酸盐减水剂的混凝土的强度相同。

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