摘要
将从麦草造纸黑液中提取的木质素进行磺化改性,探索其作为水泥混凝土减水剂的可行性。研制了ZS-3号减水剂。同时对麦草造纸黑液资源化治理工艺中产生的含磺化木质素多糖液进行了水泥混凝土减水性能实验。研制了ZS-2号减水剂。实验结果表明,ZS-3使水泥混凝土减水率达10%,7d抗压强度增加18%,28d抗压强度增加5%,达到水泥混凝土普通减水剂性能。ZS-2使水泥混凝上减水率达10%,7d抗压强度增加73%,28d抗压强度增加26%,达到水泥混凝土高效减水剂性能。
Lignin extracted from an alkaline wheat straw pulping black liquor was modified by sulfonation to study the feasibility of its use as a concrete water reducing agent. This has resulted in the development of ZS-3 water-reducing admixture. In addition, a liquor containing sulfonated lignin and polysaccharides from the conversion process of wheat straw pulping black liquor was found to have a function of concrete water reduction and was turned into a superplasticizer ZS-2. Both ZS3 and ZS-2 had a water reduction by 10%. The compressive strength of concrete was increased by 18%(7 days) or 5 %(28 days) when ZS-3 was added, and by 73%(7 days) or 2% (28 days)when ZS-2 was added.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1995年第4期46-48,共3页
Environmental Science
基金
轻工部科技开发基金
关键词
麦草木质素
磺化
混凝土
减水剂
水泥混凝土
concrete water-reducing admixture,wheat straw lignin, sulfonation.