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为降低生产成本和制备无甲醛缓凝型高效减水剂,采用葡萄糖替代甲醛,在热碱条件下与丙酮和亚硫酸钠混合反应,通过工艺优化,合成缓凝型高效减水剂,并利用紫外分光光度计和Zeta电位仪,分别测试了水泥对缓凝型高效减水剂的吸附量和水泥颗粒表面电位。同时,经水泥净浆经时流动度、砂浆减水率、抗压强度和水泥凝结时间的测试结果表明,在最佳工艺条件下制备的缓凝型高效减水剂具有较好的缓凝和减水效果,可通过调节掺量配制不同工程要求的高性能混凝土,且经济环保。
In order to reduce the production cost and to prepare formaldehyde-free retarder-type superplasticizer, glucose is used instead of formaldehyde, mixed with acetone and sodium sulfite under the condition of hot alkali to optimize the process, the retarding superplasticizer is synthesized, Photometer and Zeta Potentiometer, respectively, the cement on the retarding superplasticizer adsorption capacity and cement particles surface potential. At the same time, the results show that the retarding superplasticizer prepared under the optimal process conditions has good retarding effect on the cementitious material by time flow, mortar water-reducing rate, compressive strength and cement setting time. Water-reducing effect, by adjusting the amount of preparation of different engineering requirements of high performance concrete, and economic and environmental protection.