含有胶凝材料胶囊和高炉矿渣集料的自愈合水泥复合材料的抗压强度、抗氯离子渗透性和裂缝恢复性能

IF 7.2 2区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Journal of CO2 Utilization Pub Date : 2024-08-01 DOI:10.1016/j.jcou.2024.102916
Jae-In Lee, Se-Jin Choi
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引用次数: 0

摘要

高炉矿渣骨料(BFSA)是钢铁工业的副产品,是一种用于砂浆和混凝土的环保型天然骨料替代品。然而,有关使用高炉矿渣骨料的自愈合水泥复合材料的研究却很少见。在这项研究中,研究了使用胶凝材料胶囊(CMC)和不同比例的 BFSA 制备的自愈合水泥砂浆样品的抗压强度、抗氯离子渗透性和裂缝恢复性能,并与对照样品进行了比较。测试样品包括对照组;C05B00(5 % CMC 和 0 % BFSA);C05B25(5 % CMC 和 25 % BFSA);C05B50(5 % CMC 和 50 % BFSA);C10B00(10 % CMC 和 0 % BFSA);C10B25(10 % CMC 和 25 % BFSA);以及 C10B50(10 % CMC 和 50 % BFSA)。对照组的抗压强度恢复率在 28 天后停止上升,在第 56 天时约为 110%,而 C10B50 的抗压强度恢复率约为 121%(比对照组高 10%),甚至在 56 天后仍在继续上升。C10B50 的抗氯离子渗透性极佳;28 天的总电荷量约为 5858 C(比对照组低 40.2%)。第 28 天,C05B50 和 C10B25 的裂纹恢复率分别为 71 % 和 70 %(比对照组高出 29-30 %)。
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Compressive strength, chloride-ion-penetration resistance, and crack-recovery properties of self-healing cement composites containing cementitious material capsules and blast-furnace-slag aggregates

Blast-furnace-slag aggregate (BFSA), a by-product of the steel industry, is an eco-friendly natural, aggregate substitute used in mortar and concrete. However, research on self-healing cement composites using BFSA is rare. In this study, the compressive strength, chloride-ion-penetration resistance, and crack-recovery properties of self-healing cement mortar samples prepared using cementitious material capsules (CMC) and BFSA of different ratios were examined and compared to a control sample. The test samples were: Control; C05B00 (5 % CMC and 0 % BFSA); C05B25 (5 % CMC and 25 % BFSA); C05B50 (5 % CMC and 50 % BFSA); C10B00 (10 % CMC and 0 % BFSA); C10B25 (10 % CMC and 25 % BFSA); and C10B50 (10 % CMC and 50 % BFSA). The compressive-strength recovery rate of the control stopped increasing after 28 days and was approximately 110 % on day 56 – that of C10B50 was approximately 121 %, (∼10 % greater than that of the control) and continued to increase even after 56 d. The chloride-ion-penetration resistance of C10B50 was excellent; the 28-day total charge was approximately 5858 C (∼ 40.2 % lower than that of the control). The crack-recovery rates, on day 28, of C05B50 and C10B25 were 71 % and 70 %, respectively (∼ 29–30 % higher than that of the control).

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来源期刊
Journal of CO2 Utilization
Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.90
自引率
10.40%
发文量
406
审稿时长
2.8 months
期刊介绍: The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.
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