抗腐蚀剂对火山灰混凝土碳化性能的影响.pdf

学兔w. klett.ceom
2015年12月
高速铁路技术
第6卷第6期
HIGH SPEED RAILWAY TECHNOLOGY
Dec.2015
文章编号:1674-8247(2015)06-0049~06
抗腐蚀剂对火山灰混凝士碳化性能的影响
薛元曾晓辉徐锡江邱恩喜张东卿张理
(1.中铁二院工程集团有限责任公司,成都610031;2.西南交通大学土木工程学院,成都610031;
3.四川容铁科技有限责任公同,成都610031)
摘要:我国云南以保瑞、丽香为代表的一大批铁路工程正在修建或立项建设。由于云南西部一帯铁路环境
侵蚀等级为中等水平,混凝土较易受到各种侵蚀物质的破坏,从而使结构服役寿命达不到设计要求,可通过
掺人粉煤灰、矿渣、火山灰等来提高混凝土的耐久性,但将导致混凝土抗碳化能力变差。文章研究了抗腐蚀
剂对混凝土抗碳化性能的改善作用,研究表明:尽管掺入火山灰后,不同标号混凝土碳化深度有所增加,混凝
土抗碳化能力降低,但加入抗腐蚀剂可显著改善火山灰混凝土抗碳化能力。其中加入5%的VA-2型抗腐蚀
剂,C20混凝土,28d碳化深度可降低20%以上,与掺入粉煤灰的效果接近,而CA0混凝土,28d碳化深度则
可降低25%以上,比掺人粉煤灰降低约15%。
关键词:火山灰;混凝土;抗腐蚀剂;碳化
中图分类号TU528.33文献标志码
Effect of Corrosion Inhibitor on Carbonization
Resistance of Volcanic Ash Concrete
XUE Yuan ZENG Xiaohui XU Xijiang QIU Enxi ZHANG Dongging ZHANG Li
(1. China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China
2. Southwest Jiaotong University, Chengdu 610031, China
3. Sichuan Ruitie Technology Co. Ltd, Chengdu 610031, China
Abstract: In Yunnan province of China, large quantities of railway projects such as Baoshan-ruili and
ng
Xianggelila railways, etc. are in construction or approved. As the environmental corrosion class of the railways in west
area of Yunnan is in the medium range, the concrete is easy to be damaged, and as a result, the service life the struc-
ture cant satisfy the demand of the designing. The fly ash, slag and volcanic ash, ete. can be mixed to promote the du
rability of the concrete, but they may have negative effects on the carbonization resistance of concrete. In this paper, the
improvement effect of corrosion inhibitor on the carbonation resistance of concrete is studied. The research shows that the
carbonation depth of concrete with different mark number is somewhat increased and carbonation resistance of concrete
decreased. among which, added with 5% VA-2 type corrosion inhibitor, 28 d carbonation depth of C20 concrete can
be increased more than 20%, close to the effect of that with fly ash, moreover, 28 d carbonation depth of C40 concrete
an be deceased more than 25%, and about 15% lower than that mixed with fly ash
Key words volcanic ash: concrete; corrosion inhibitor; carbonation
1前言
收稿日期:201507-01
在我国云南西部地区,近年来铁路进入投资的高
作者简介:酵元(1978-),男,高级工程师
基金项目:国家自然科学基金(51208439),教育部博土点基金
潮,以保瑞、广大、丽香为代表的一大批铁路工程正在
(20120184120031),中国博士后特别资助项日(2013160859),中铁二院
科研项目[川睿铁发(2014)17号]
修建或立项建设,这些铁路作为泛亚铁路、滇铁路的