Corrosion Behavior of Rebars Embedded in Alkali-Activated and Conventional Reactive Powder Concretes

IF 0.8 4区工程技术 Q4 ENGINEERING, CIVIL

Teknik Dergi Pub Date : 2020-11-01 DOI:10.18400/tekderg.478154

Hüseyin Yiğiter, A. Beglarigale, S. Aydın, B. Baradan

引用次数: 1

Abstract

The present study investigated the corrosion behavior of reinforcement bars embedded in alkali-activated (ARPC) and conventional (CRPC) reactive powder concretes. Corrosion progress in 3.5% NaCl solution, water and air environments were monitored up to 365 days. The physical and mechanical characteristics, such as water absorption, rapid chloride ion permeability, compressive and flexural strength, and corrosion characteristics, such as half cell potential and corrosion current intensity results were compared for ARPC and CRPC matrices. Even for the same mechanical performance, alkali-activated mortars were found to have a high permeable structure and an early depassivation of the rebars occurred. In the propagation stage of chloride induced corrosion, almost 13 times higher corrosion current intensity values were measured as well as earlier deterioration and cracking was observed for ARPC compared to CRPC.

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碱活性和常规活性粉末混凝土中钢筋的腐蚀行为

本研究研究了嵌入碱活性（ARPC）和常规（CRPC）活性粉末混凝土中的钢筋的腐蚀行为。对3.5%NaCl溶液、水和空气环境中的腐蚀过程进行了长达365天的监测。比较了ARPC和CRPC基体的物理和机械特性，如吸水性、快速氯离子渗透性、抗压和抗弯强度，以及腐蚀特性，如半电池电位和腐蚀电流强度结果。即使在相同的机械性能下，也发现碱活化砂浆具有高渗透性结构，并且钢筋出现早期去钝化。在氯化物诱导腐蚀的扩展阶段，与CRPC相比，ARPC的腐蚀电流强度值几乎高出13倍，并且观察到更早的劣化和开裂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Teknik Dergi 工程技术-工程：土木

自引率

30.80%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Teknik Dergi is naturally confined with the subjects falling in the area of civil engineering. However, the area of civil engineering has recently been significantly enlarged, even the definition of civil engineering has somewhat changed. Half a century ago, engineering was simply defined as “the art of using and converting the natural resources for the benefit of the mankind”. Today, the same objective is expected to be realised (i) by complying with the desire and expectations of the people concerned and (ii) without wasting the resources and within the sustainability principles. This change has required an interaction between engineering and social and administrative sciences. Some subjects at the borderline between civil engineering and social and administrative sciences have consequently been included in the area of civil engineering. Teknik Dergi defines its scope in line with this understanding. However, it requires the papers falling in the borderline to have a significant component of civil engineering.