Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method and application of water-reducing reinforcing agent for byproduct building gypsum
The invention relates to the technical field of building material additives, in particular to a preparation method and application of a water-reducing reinforcing agent for byproduct building gypsum, the physical dispersion effect of polycarboxylic acid mother liquor has a water-reducing effect on gypsum slurry, and trace biomacromolecules are introduced on the basis of physical dispersion and water reduction of the polycarboxylic acid mother liquor, so that the water-reducing reinforcing agent for byproduct building gypsum is obtained. According to the present invention, poly (amino acid), protein or protein hydrolysate is introduced, and after the poly (amino acid), the protein or the protein hydrolysate is dissolved in water, the hydroxyl and carboxyl functional groups contained in the molecular structure can be combined with Ca < 2 + > in the gypsum slurry so as to reduce the mutual combination frequency of Ca < 2 + > and SO4 < 2-> in the gypsum solution, such that the hydration hardening rate of the gypsum slurry at the initial stage can be effectively limited; therefore, the water consumption of the gypsum in the initial stage is reduced; meanwhile, the content of free water is increased, the content of a crystal phase in the slurry is reduced, and the fluidity of the gypsum slurry is effectively improved, so that the water consumption is reduced, and the gypsum preparation cost is reduced.
本发明涉及建筑材料添加剂技术领域，具体涉及一种副产建筑石膏用减水增强剂的制备方法和应用，通过聚羧酸母液的物理分散作用对石膏浆体具有减水的作用，并通过在聚羧酸母液物理分散减水的基础上，引入微量生物大分子，即引入聚氨酸、蛋白质或蛋白质的水解产物，溶于水后其分子结构中含有的羟基和羧基官能团可以与石膏浆体中的Ca2+结合，从而降低了石膏溶液中Ca2+与SO42‑互相结合的频率，这会有效限制初始阶段石膏浆体水化硬化的速率，从而降低石膏在初始阶段的用水量；同时增加自由水的含量，减少浆体中结晶相的含量，有效增加石膏浆体的流动度，从而降低用水量，减少石膏制备的成本。
Preparation method and application of water-reducing reinforcing agent for byproduct building gypsum
The invention relates to the technical field of building material additives, in particular to a preparation method and application of a water-reducing reinforcing agent for byproduct building gypsum, the physical dispersion effect of polycarboxylic acid mother liquor has a water-reducing effect on gypsum slurry, and trace biomacromolecules are introduced on the basis of physical dispersion and water reduction of the polycarboxylic acid mother liquor, so that the water-reducing reinforcing agent for byproduct building gypsum is obtained. According to the present invention, poly (amino acid), protein or protein hydrolysate is introduced, and after the poly (amino acid), the protein or the protein hydrolysate is dissolved in water, the hydroxyl and carboxyl functional groups contained in the molecular structure can be combined with Ca < 2 + > in the gypsum slurry so as to reduce the mutual combination frequency of Ca < 2 + > and SO4 < 2-> in the gypsum solution, such that the hydration hardening rate of the gypsum slurry at the initial stage can be effectively limited; therefore, the water consumption of the gypsum in the initial stage is reduced; meanwhile, the content of free water is increased, the content of a crystal phase in the slurry is reduced, and the fluidity of the gypsum slurry is effectively improved, so that the water consumption is reduced, and the gypsum preparation cost is reduced.
本发明涉及建筑材料添加剂技术领域，具体涉及一种副产建筑石膏用减水增强剂的制备方法和应用，通过聚羧酸母液的物理分散作用对石膏浆体具有减水的作用，并通过在聚羧酸母液物理分散减水的基础上，引入微量生物大分子，即引入聚氨酸、蛋白质或蛋白质的水解产物，溶于水后其分子结构中含有的羟基和羧基官能团可以与石膏浆体中的Ca2+结合，从而降低了石膏溶液中Ca2+与SO42‑互相结合的频率，这会有效限制初始阶段石膏浆体水化硬化的速率，从而降低石膏在初始阶段的用水量；同时增加自由水的含量，减少浆体中结晶相的含量，有效增加石膏浆体的流动度，从而降低用水量，减少石膏制备的成本。
Preparation method and application of water-reducing reinforcing agent for byproduct building gypsum
一种副产建筑石膏用减水增强剂的制备方法和应用
QUAN XIN (Autor:in) / LI QINGBIAO (Autor:in) / LI XUEPENG (Autor:in) / GUO LEI (Autor:in) / TAN JIANHONG (Autor:in) / LIU DONGSHENG (Autor:in)
29.04.2022
Patent
Elektronische Ressource
Chinesisch
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