Synergistic effects of superplasticizers and biopolymer-based viscosity-modifying admixtures on the rheology of cement-based systems

IF 10.8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2024-10-18 DOI:10.1016/j.cemconcomp.2024.105807

J.V. González-Aviña , Masoud Hosseinpoor , Ammar Yahia , A. Durán-Herrera

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引用次数: 0

Abstract

The study investigated the synergistic effects of combining superplasticizers with biopolymer-derived viscosity-modifying admixtures (VMAs) to enhance the performance of cement-based systems. Superplasticizers, including polycarboxylate ethers (PCE) and polynaphthalene sulfonates (PNS), were combined with VMAs derived from anionic (welan, tragacanth, and almond gums, and giant kelp extract) and non-ionic (guar and locust bean gums) biopolymers. Performance analysis methods included: (1) assessment of elasticity and structural build-up, (2) evaluation of viscosity, yield stress, and stability, and (3) analysis of hydration kinetics and development of compressive strength. Anionic biopolymers, such as welan gum and giant kelp extract, formed strong elastic flocculated networks, while tragacanth and almond gums led to networks with rapid rigidification. These biopolymer-based mixtures exhibited high stability against forced bleeding due to their superior viscoplastic properties. Among non-ionic biopolymers, guar gum systems resulted in higher visco-elastoplastic properties compared to locust bean gum systems. The hydration process and compressive strength development were significantly influenced by the type of VMA and dosage, as well as the type of superplasticizer used.

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超塑化剂和基于生物聚合物的粘度调节外加剂对水泥基体系流变学的协同效应

该研究探讨了将超塑化剂与生物聚合物衍生的粘度调节外加剂（VMAs）结合使用以提高水泥基体系性能的协同效应。将包括聚羧酸醚（PCE）和聚萘磺酸盐（PNS）在内的超塑化剂与阴离子（维兰胶、角叉菜胶和杏仁胶以及大海带提取物）和非离子（瓜尔豆胶和刺槐豆胶）生物聚合物衍生的 VMA 结合使用。性能分析方法包括(1) 弹性和结构构建评估，(2) 粘度、屈服应力和稳定性评估，以及 (3) 水合动力学和抗压强度发展分析。威兰胶和大海带提取物等阴离子生物聚合物形成了弹性较强的絮凝网络，而角叉菜胶和杏仁胶则形成了快速刚性化的网络。这些基于生物聚合物的混合物因其卓越的粘塑性能而在强制出血时表现出很高的稳定性。在非离子生物聚合物中，瓜尔豆胶体系的粘弹性能高于槐豆胶体系。水化过程和抗压强度的发展受到 VMA 类型、用量以及所使用的增塑剂类型的显著影响。

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来源期刊

Cement & concrete composites 工程技术-材料科学：复合

CiteScore

18.70

自引率

11.40%

发文量

459

审稿时长

65 days

期刊介绍： Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.