Preparation and properties of ultra-high performance concrete incorporation multi-mineral admixtures

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

Materials Research Express Pub Date : 2024-09-08 DOI:10.1088/2053-1591/ad71a1

Wenhua Zhao, Jiahui Kong and Qi Sun

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Abstract

The impact of multi-mineral admixtures on the sturdiness of ultra-high performance concrete (UHPC). In this study on the premise that multi-mineral admixtures can be utilized in UHPC, we optimized the percentage of three admixtures(limestone powder,slag, and pumice powder) that can replace cement using the Box-Behken design response surface method, and prepared UHPC specimens with multi-mineral admixtures. The rationality of the multi-mineral admixtures approach proposed in this study was confirmed by characterizing the mechanical properties and porosity of the prepared specimens. Durability was also investigated through relevant tests. The results showed that the porosity of the prepared UHPC decreased by 49.4%, the mechanical properties improved by 14.7%, the self-shrinkage and drying shrinkage decreased by 9.8% and 6.2%, respectively, and the volume stability improved. Moreover the resistance to sulfate dry-wet cycling, chloride ion permeation, and carbonization improved significantly. This study, thus, demonstrates a new type of multi-mineral admixture for UHPC with excellent mechanical properties and durability.

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掺入多种矿物掺合料的超高性能混凝土的制备和性能

多矿物掺合料对超高性能混凝土（UHPC）坚固性的影响。本研究以多矿物掺合料可用于超高性能混凝土为前提，采用 Box-Behken 设计响应面法优化了可替代水泥的三种掺合料（石灰石粉、矿渣和浮石粉）的比例，并制备了掺有多矿物掺合料的超高性能混凝土试件。通过对所制备试样的力学性能和孔隙率进行表征，证实了本研究提出的多矿物掺合料方法的合理性。此外，还通过相关测试对耐久性进行了研究。结果表明，制备的 UHPC 孔隙率降低了 49.4%，力学性能提高了 14.7%，自收缩和干燥收缩分别降低了 9.8% 和 6.2%，体积稳定性提高了。此外，对硫酸盐干湿循环、氯离子渗透和碳化的抗性也有明显改善。因此，这项研究证明了一种新型的多矿物掺合料适用于具有优异机械性能和耐久性的超高性能混凝土。

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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.

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