Reduction of dissolved oxygen in minimizing corrosion
Reduction of dissolved oxygen in minimizing corrosion
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DOI：
10.14311/app.2022.33.0624
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发表时间：
2022-03
影响因子：
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通讯作者：
Mary Grace Ventanilla;J. Ongpeng;Nishida Takahiro;K. Kawaai
中科院分区：
文献类型：
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作者：
Mary Grace Ventanilla;J. Ongpeng;Nishida Takahiro;K. Kawaai
混凝土结构容易受到腐蚀，尤其是暴露在海洋环境中时。为了减少钢筋混凝土的腐蚀，建议减少搅拌水中的溶解氧（DO）。溶解氧是溶解在水中的游离氧的量的量度，其与混凝土内钢筋的腐蚀速率成比例。本文探讨了利用工业废渣、农业废弃物、天然矿物和绿色抑制剂作为水泥添加剂来降低混合水中溶解氧水平的方法。候选材料来自不同类型的农业废物、工业废物、天然矿物和绿色抑制剂。计算了在室温下所有类型的材料（如灰、粉末或提取物）的溶解氧百分比差异。这是蒸馏水和与质量比为3：2和/或3：1的候选材料混合的溶液中的DO水平的百分比差异。结果表明，生姜提取物、生姜粉、芦荟提取物、生姜浆和船体灰混合后，溶解氧水平降低90%以上。建议今后的实验研究使用候选材料生产钢筋混凝土试件与高减少溶解氧水平的混合水。
Concrete structures are susceptible to corrosion especially when exposed to marine environment. In order to minimize the corrosion in reinforced concrete, reduction of dissolved Oxygen (DO) in mixing water is recommended. The DO is the measurement of the amount of free Oxygen that is dissolved in water which is proportional to the corrosion rate of steel bars inside concrete. In this paper, the use of industrial waste/by-products, agricultural waste, natural minerals, and green inhibitors as additive for cement in reducing the DO level of the mixing water was explored. Candidate materials from different types of agricultural waste, industrial waste, natural minerals, and green inhibitors. The percentage difference of DO were computed for all types of materials as ash or powder or extract in room temperature. This is the percentage difference of DO level in distilled water and the solution mixed with the candidate material having a mass ratio of 3 : 2 and/or 3 : 1. Results showed that more than 90% reduction of DO level were achieved when mixed with ginger extract, ginger powder, aloe vera extract, ginger pulp, and rice hull ash. Future experimental studies using the candidate materials producing reinforced concrete specimens with high reduction of DO level in mixing water is recommended.