摘要
为研究CFG桩身材料在泥炭(质)土环境中的腐蚀情况,试验选用富里酸作为试验用酸,采用室内浸泡模拟昆明地区的泥炭(质)土环境,将五种不同粉煤灰掺量的CFG桩身材料试件浸泡在清水和p H值为6. 0的富里酸溶液中,对比分析不同粉煤灰掺量的桩身材料试件在清水和富里酸溶液中各浸泡龄期的无侧限抗压强度和表面变化情况。试验结果表明,桩身材料的早期强度会随粉煤灰掺量的增加而降低;所有浸泡在富里酸溶液中的试件表面均变得疏松,且其强度均明显小于浸泡在清水中的试件的抗压强度;富里酸对桩身材料的强度发展有明显的抑制作用,对桩身材料具有腐蚀性;掺入适量(45%)的粉煤灰可提高桩身材料抗富里酸的腐蚀能力。
In order to study the corrosion of CFG pile material in peat and peaty soil,the experiment was carried out with fulvic acid. The indoor immersion method was used to simulate the peat and peaty soil environment in Kunming area. Five CFG pile material specimens with different fly ash content were immersed in water and fulvic acid solution with 6. 0 p H value. The surface change and unconfined compressive strength change of pile material specimens with different fly ash content in water and fulvic acid solution at different immersion ages were compared and analyzed. The test results show that the early strength of pile material will decrease with the increase of fly ash content. The surface of all specimens immers in fulvic acid solution became loose,and their strength is significantly lower than that of the specimens immersed in water.Fulvic acid obviously inhibits the development of pile material strength. It is corrosive to pile material. Adding appropriate amount of fly ash( 45%) can improve the corrosion resistance of pile material to fulvic acid.
作者
曹净
胡益铖
刘海明
CAO Jing;HU Yi-cheng;LIU Hai-ming(School of Civil Engineering and Architecture,Kunming University of Science and Technology,Kunming 650500,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第12期3972-3979,共8页
Bulletin of the Chinese Ceramic Society
基金
十三五国家重点研发计划(2017YFC0804601)
国家自然科学基金地区项目(51764020)
关键词
CFG桩
富里酸
粉煤灰
腐蚀性
抗压强度
CFG pile
fulvic acid
fly ash
corrosivity
compressive strength
