Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Environment-friendly energy-saving water reducing agent and preparation process thereof
The invention relates to the technical field of water reducing agents, in particular to an environment-friendly energy-saving water reducing agent and a preparation process thereof. The preparation method specifically comprises the following steps: step 1, carrying out quaternization treatment on chitosan to obtain quaternized chitosan; grafting the chitosan with a hyperbranched monomer to obtain modified chitosan; and 2, grafting the modified chitosan with anhydride, and grafting the modified chitosan with an unsaturated monomer to obtain the polycarboxylate superplasticizer. The polycarboxylic acid water reducing agent has good adaptability to cement, can enable the cement to keep good fluidity all the time in the hydration process, inhibits early-stage hydration of the cement, slows down the hydration heat peak period, can fully react with the cement, reduces the cement flocculation phenomenon, improves the strength of concrete, and can greatly save the cement and water; and the method has the characteristics of no pollution to the environment, environmental protection and energy conservation.
本发明涉及减水剂技术领域，具体为一种环保型节能减水剂及其制备工艺。具体包括如下步骤：步骤一：将壳聚糖进行季铵化处理，得到季铵化壳聚糖；再将其与超支化单体接枝，得到改性壳聚糖；步骤二：将改性壳聚糖与酸酐进行接枝，再将其与不饱和单体接枝，得到聚羧酸减水剂。该聚羧酸减水剂能够与水泥具有良好的适应性，能使水泥在水化过程中一直保持良好的流动性，抑制了水泥的前期水化，减缓了水化热高峰期，能与水泥充分反应，减少了水泥絮凝现象，提高了混凝土的强度，能大量节约水泥和水，且对环境没有污染性极小，具有环保节能的特点。
Environment-friendly energy-saving water reducing agent and preparation process thereof
The invention relates to the technical field of water reducing agents, in particular to an environment-friendly energy-saving water reducing agent and a preparation process thereof. The preparation method specifically comprises the following steps: step 1, carrying out quaternization treatment on chitosan to obtain quaternized chitosan; grafting the chitosan with a hyperbranched monomer to obtain modified chitosan; and 2, grafting the modified chitosan with anhydride, and grafting the modified chitosan with an unsaturated monomer to obtain the polycarboxylate superplasticizer. The polycarboxylic acid water reducing agent has good adaptability to cement, can enable the cement to keep good fluidity all the time in the hydration process, inhibits early-stage hydration of the cement, slows down the hydration heat peak period, can fully react with the cement, reduces the cement flocculation phenomenon, improves the strength of concrete, and can greatly save the cement and water; and the method has the characteristics of no pollution to the environment, environmental protection and energy conservation.
本发明涉及减水剂技术领域，具体为一种环保型节能减水剂及其制备工艺。具体包括如下步骤：步骤一：将壳聚糖进行季铵化处理，得到季铵化壳聚糖；再将其与超支化单体接枝，得到改性壳聚糖；步骤二：将改性壳聚糖与酸酐进行接枝，再将其与不饱和单体接枝，得到聚羧酸减水剂。该聚羧酸减水剂能够与水泥具有良好的适应性，能使水泥在水化过程中一直保持良好的流动性，抑制了水泥的前期水化，减缓了水化热高峰期，能与水泥充分反应，减少了水泥絮凝现象，提高了混凝土的强度，能大量节约水泥和水，且对环境没有污染性极小，具有环保节能的特点。
Environment-friendly energy-saving water reducing agent and preparation process thereof
一种环保型节能减水剂及其制备工艺
GUO WUPING (Autor:in) / FAN RUITAO (Autor:in) / HUANG JINGRONG (Autor:in) / WANG ZEPENG (Autor:in)
16.01.2024
Patent
Elektronische Ressource
Chinesisch
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