Search

Marine concrete is a kind of construction material which is seeking its growing application in marine engineering. However, the marine concrete structures are exposed to aggressive environment and harmful ions. Therefore, it is crucial to improve the durability of marine concrete. The concrete structure located in the tidal zone is subjected to the dry–wet cycles caused by tidal action, chloride ion (Cl−) erosion in seawater, and CO2 erosion in air. When these factors work together, they cause great damage to the marine concrete structure. In view of the three environmental factors, namely, Cl− erosion, carbonation, and dry–wet cycles, taking fly ash, fibers, and nanomaterials as examples, this article expounds the research status of durability of marine concrete, introduces the latest research progress, the addition of fibers, fly ash, and nanomaterials can improve the Cl− corrosion resistance and dry–wet cycles resistance of marine concrete, while the addition of fly ash is unfavorable for carbonation resistance. And the future development trend of marine concrete is prospected.

Objective: To assess the effect of goal diversified nursing intervention on the perinatal period of patients with gestational diabetes mellitus (GDM). Methods: In this prospective study, 96 patients with GDM treated from February 2020 to February 2023 were selected and randomly divided into observation group (n=48) and control group (n=48). The patients in control group were given routine nursing, based on which those in observation group received goal-oriented diversified nursing intervention. The incidence rates of perioperative complications and adverse neonatal outcomes, and blood glucose indicators, the Chinese Version of the Diabetes Management Self-efficacy Scale (C-DMSES) score and the Diabetes Specific Quality of Life Scale (DSQL) score before and after intervention were compared between the two groups. Results: The levels of fasting plasma glucose, 2-hour postprandial blood glucose and glycosylated hemoglobin in the observation group during delivery were lower than those in the control group and before intervention (P<0.05). The C-DMSES score in each dimension in the observation group after intervention was higher than that in the control group and before intervention (P < 0.05). After intervention, the scores of treatment, physiology, psychology and social relationship in DSQL in the observation group were significantly lower than those in the control group and before intervention (P < 0.05). The incidence rate of perioperative complications in the observation group (10.42%) was significantly lower than that in the control group (31.25%) (P < 0.05). Conclusion: Goal-oriented diversified nursing intervention can effectively control the blood glucose indicators, improve self-management ability, reduce the incidence of perioperative complications and adverse neonatal outcomes. [ABSTRACT FROM AUTHOR]

Copyright of Acta Paulista de Enfermagem is the property of Universidade Federal de Sao Paulo, Escola Paulista de Enfermagem and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)