亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Long-Term Performance of Silica Fume Concrete in Soil Exposure of Marine Environments

硅粉 碳化作用 胶凝的 硅酸盐水泥 材料科学 使用寿命 氯化物 涂层 水泥 混凝土保护层 复合材料 灰浆 腐蚀 冶金
作者
Seyedhamed Sadati,Mehdi Khanzadeh Moradllo,Mohammad Shekarchi
出处
期刊:Journal of Materials in Civil Engineering [American Society of Civil Engineers]
卷期号:29 (9) 被引量:18
标识
DOI:10.1061/(asce)mt.1943-5533.0001962
摘要

Given the time-dependent microstructural modifications in cement matrix, long-term monitoring of concrete in natural exposures will be necessary. The present research addresses the long-term performance of concrete specimens embedded in coastal soil of a harsh marine environment for 88 months. Chloride ion diffusion, binding capacity, and effects of carbonation and surface coatings were investigated for concrete mixtures with up to 12.5% silica fume (SF) and water-to-cementitious materials ratios (w/cm) of 0.4 and 0.5. Three types of surface coatings, including bitumen and rubber emulsion, polymer modified cementitious coating, and polyurethane, were also incorporated. It was observed that concentration of bound chloride ion is decreasing as a result of an increase in SF content from 0 to 12.5% and increasing the w/cm from 0.4 to 0.5. Slight carbonation was observed at 88 months, with carbonation depths limited to 5.5 mm. Decrease in chloride binding capacity was observed in carbonated areas. Depth of concrete cover to reach 50 and 100 years of service life was calculated. It was observed that a concrete cover of 200 mm can secure 100 years of service life while incorporating a concrete mixture with w/cm of 0.5 and 100% portland cement. The required thickness of cover was reduced to 35 mm in the case of the mixture cast with 12.5% SF and w/cm of 0.4. Coating equivalency lines were developed to compare the efficiency of the investigated coatings with corresponding combinations of w/cm and SF replacement level.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
13秒前
20秒前
28秒前
29秒前
己凡发布了新的文献求助10
35秒前
37秒前
45秒前
50秒前
59秒前
124332发布了新的文献求助30
1分钟前
1分钟前
己凡发布了新的文献求助10
1分钟前
1分钟前
曾经白亦完成签到 ,获得积分10
1分钟前
1分钟前
1分钟前
Dan关闭了Dan文献求助
1分钟前
贲碧曼完成签到 ,获得积分10
2分钟前
2分钟前
诸葛不亮_1完成签到,获得积分10
2分钟前
万能图书馆应助谢紫微采纳,获得10
2分钟前
2分钟前
2分钟前
谢紫微发布了新的文献求助10
2分钟前
TsuKe完成签到,获得积分10
2分钟前
2分钟前
Owen应助dd采纳,获得10
2分钟前
2分钟前
我是站长才怪应助流白采纳,获得20
2分钟前
2分钟前
2分钟前
2分钟前
吕易巧发布了新的文献求助10
2分钟前
3分钟前
小二郎应助己凡采纳,获得10
3分钟前
3分钟前
英姑应助阔达的寄灵采纳,获得10
3分钟前
Akim应助Nacy采纳,获得10
3分钟前
谢紫微完成签到,获得积分10
3分钟前
谢紫微发布了新的文献求助30
3分钟前
高分求助中
Rock-Forming Minerals, Volume 3C, Sheet Silicates: Clay Minerals 2000
The late Devonian Standard Conodont Zonation 2000
Nickel superalloy market size, share, growth, trends, and forecast 2023-2030 2000
The Lali Section: An Excellent Reference Section for Upper - Devonian in South China 1500
Very-high-order BVD Schemes Using β-variable THINC Method 930
The Vladimirov Diaries [by Peter Vladimirov] 600
Development of general formulas for bolted flanges, by E.O. Waters [and others] 600
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3265467
求助须知:如何正确求助?哪些是违规求助? 2905520
关于积分的说明 8333941
捐赠科研通 2575806
什么是DOI,文献DOI怎么找? 1400130
科研通“疑难数据库(出版商)”最低求助积分说明 654702
邀请新用户注册赠送积分活动 633532