Synthesis of polycarboxylate superplasticizer modified by self-made functional monomer for improving clay tolerance

IF 1.4 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Cement Research Pub Date : 2023-01-09 DOI:10.1680/jadcr.22.00118

Guangyang Wang, Yuanming Song

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引用次数: 0

Abstract

Polycarboxylate superplasticizer (PCE) is commonly sensitive to clay minerals, so this paper proposes synthesizing several clay-resistant superplasticizers (CR-PCE) using a novel self-made functional monomer. The resulting functional monomer and superplasticizers were characterized by Fourier transform infrared spectrophotometry (FT-IR) and gel permeation chromatography (GPC). The results show that the CR-PCE samples exhibit a better dispersion performance as compared to the conventional polycarboxylate superplasticizer (C-PCE) sample in the montmorillonite-bearing cement pastes. The adsorption amount of the CR-PCE samples on the Mmt was investigated by Ultraviolet-visible spectrophotometry (UV), and it was found that the CR-PCE samples have a lower clay sensitivity compared with the C-PCE sample. The X-ray diffraction (XRD) results of the montmorillonite (Mmt) reveal that the interlayer spacing of the Mmt treated by the CR-PCE samples was lower than that of the Mmt treated by the C-PCE sample. It can thus be concluded that the functional monomer can effectively improve the clay tolerance performance of PCE.

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自制功能单体改性聚羧酸系高效减水剂的合成

聚羧酸系高效减水剂（PCE）通常对粘土矿物敏感，因此本文提出用自制的新型功能单体合成几种抗粘土超减水剂（CR-PCE）。用傅立叶变换红外光谱法（FT-IR）和凝胶渗透色谱法（GPC）对所得功能单体和高效减水剂进行了表征。结果表明，与传统的聚羧酸系高效减水剂（C-PCE）样品相比，CR-PCE样品在含蒙脱石水泥浆体中表现出更好的分散性能。通过紫外-可见分光光度法（UV）研究了CR-PCE样品在Mmt上的吸附量，发现与C-PCE样品相比，CR-PCE样本具有较低的粘土敏感性。蒙脱石（Mmt）的X射线衍射（XRD）结果表明，经CR-PCE处理的Mmt的层间距低于经C-PCE处理的Mmt的层间距。由此可见，功能单体可以有效地提高PCE的耐粘土性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Cement Research 工程技术-材料科学：综合

CiteScore

3.70

自引率

5.00%

发文量

审稿时长

3.2 months

期刊介绍： Advances in Cement Research highlights the scientific ideas and innovations within the cutting-edge cement manufacture industry. It is a global journal with a scope encompassing cement manufacture and materials, properties and durability of cementitious materials and systems, hydration, interaction of cement with other materials, analysis and testing, special cements and applications.