Preparation of modified ether polycarboxylic acid water reducing agent and evaluation

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Express Pub Date : 2024-08-23 DOI:10.1088/2053-1591/ad6a03

Yunhai Shi, Kai Lu, Zejian He, Yulong Chen, Mi Zhou

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Abstract

Water reducing agent as an important admixture. It is used to decrease the initial water content in cement paste, improving its fluidity. Polycarboxylic acid water reducing agent (PCE) is a high-performance type with advantages such as low dosage, high water reduction rate, environmental friendliness, and a simple synthesis process. In this study, the third monomer (TPEG-SAA-SHES) was synthesized by modifying isopentenol polyoxyethylene ether (TPEG) with sodium hydroxyethyl sulfonate (SHES). Subsequently, a modified ether polycarboxylic acid-based water reducing agent (PCE-S) was synthesized with TPEG and acrylic acid (AA). The experimental conditions for the synthesis of PCE-S were optimized through orthogonal tests. The synthesized PCE-S showed a certain degree of improvement in the initial net slurry flow compared to PCE, with a maximum enhancement of 19.64%. The adsorption increased by 18.25% when the TSS dosage was 5%. PCE-S enhances the hydration products of cement, increasing the compactness of the structure. The product is environmentally friendly, safe, and durable, effectively reducing the dosage of additives and helping to cut costs. It lays the foundation for the next industrialized mass production.

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改性醚聚羧酸减水剂的制备与评价

减水剂是一种重要的外加剂。它用于降低水泥浆的初始含水率，改善水泥浆的流动性。聚羧酸减水剂（PCE）是一种高性能减水剂，具有用量少、减水率高、环保、合成工艺简单等优点。本研究通过异戊烯醇聚氧乙烯醚（TPEG）与羟乙基磺酸钠（SHES）的改性合成了第三种单体（TPEG-SAA-SHES）。随后，用 TPEG 和丙烯酸（AA）合成了改性醚聚羧酸基减水剂（PCE-S）。通过正交试验优化了合成 PCE-S 的实验条件。与 PCE 相比，合成的 PCE-S 在一定程度上提高了初始净浆流量，最大提高了 19.64%。当 TSS 用量为 5%时，吸附量增加了 18.25%。PCE-S 可增强水泥的水化产物，提高结构的密实度。该产品环保、安全、耐用，可有效减少外加剂用量，有助于降低成本。它为下一步工业化大规模生产奠定了基础。

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来源期刊

Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

4.30%

发文量

640

审稿时长

12 weeks

期刊介绍： A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.