天然高分子基混凝土减水剂研究进展

Advances in Concrete Water-Reducing Agents Based on Natural Polymers

混凝土外加剂已成为混凝土第5大组成部分,其中减水剂应用最为广泛。当前,以石油化工产品为原料的多种传统减水剂会造成环境污染。为适应绿色混凝土发展的需要,开发基于可再生资源的绿色化混凝土外加剂成为必然趋势。文中综述了天然高分子基混凝土减水剂的研究进展,包括纤维素基减水剂、淀粉基减水剂,其他多聚糖高分子基减水剂等,并一步展望了减水剂研究的发展方向。

Admixtures have been the fifith required ingredients in concretes or motars, water-reducing agents were most widely applied among them. Nowadays, various kinds of conventional water-reducing agents were synthesized with raw materials derived from petroleum, which may sporadically release hazardous substances into environment and result in undesirable effects. In order to meet requirements of greener concrete, construction, non-toxic concrete superplasticizers must be developed inevitably, especially those based on renewable organic resources. The concrete water-reducing agents based on natural polymers including cellulose, starch, and some other polysaccharides were elucidated. Future research directions of above-mentioned superplasiticizers were pointed out.