含抗泥功能单体的聚羧酸减水剂的制备及抗泥性能
Preparation and Clay Tolerance of Polycarboxylate Superplasticizer Containing Anti-Clay Functional Monomer
王光阳 1宋远明 1周正1
作者信息
- 1. 烟台大学环境与材料工程学院,山东 烟台 264005
- 折叠
摘要
采用聚乙二醇400(PEG400)合成了一种新型抗泥功能单体(FM),并将其引入到聚羧酸减水剂(PCE)的分子结构上,制备了几种抗泥型聚羧酸减水剂(AC-PCE).采用傅里叶红外光谱(FT-IR)对FM和PCE进行表征,分别通过净浆流动度和砂浆流变性试验考察PCE在含蒙脱土(MMT)水泥净浆和水泥砂浆中的分散性能,并研究了PCE在MMT上的吸附特性.结果显示,与不含FM的聚羧酸减水剂相比,AC-PCE减少了在MMT上的吸附量,抑制了MMT的插层吸附,降低了含MMT水泥净浆经时流动度损失以及含MMT水泥砂浆的屈服应力.研究表明,AC-PCE具有良好的抗泥性能.
Abstract
A novel anti-clay functional monomer(FM)is synthesized with polyethylene glycol 400(PEG400),and it is then introduced to polycarboxylate superplasticizer(PCE)molecule to prepare several anti-clay polycar-boxylate superplasticizers(AC-PCE).The FM and PCE samples are characterized by Fourier transform infrared spectrophotometry(FT-IR).The dispersing performance of the FM-containing PCE samples in the montmorillonite(MMT)-bearing cement pastes and cement mortars is studied through paste fluidity and mortar rheology respective-ly.The adsorption behavior of the PCE samples on MMT is also investigated.The results show that the AC-PCEs can lower the adsorption amount of PCE on MMT,inhibit the intercalation adsorption of MMT,decrease the fluidity loss of the MMT-bearing cement pastes and the yield stress of the MMT-bearing cement mortars compared with the FM-free polycarboxylate superplasticizer.It can thus be concluded that the AC-PCEs have a desirable clay toler-ance.
关键词
聚羧酸减水剂/抗泥/功能单体/PEG400Key words
polycarboxylate superplasticizer/clay tolerance/functional monomer/polyethylene glycol 400引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据