轴压荷载对半浸泡混凝土硫酸盐侵蚀的影响

葛子毅; 逯静洲; 王晨; 童立强

doi:10.13204/j.gyjz202001021

轴压荷载对半浸泡混凝土硫酸盐侵蚀的影响

doi: 10.13204/j.gyjz202001021

烟台大学土木工程学院, 山东烟台 264005

基金项目:

国家自然科学基金项目（51978596）；山东省自然科学基金博士基金项目（ZR2017BEE046）。

详细信息

作者简介:
葛子毅,男,1991年出生,硕士研究生。

计量
- 文章访问数: 66
- HTML全文浏览量: 3
- PDF下载量: 2
- 被引次数: 2
出版历程
- 收稿日期: 2019-07-20

EFFECT OF AXIAL LOAD ON SULFATE ATTACK OF SEMI-IMPREGNATED CONCRETE

GE,
Ziyi^,,
LU,
Jingzhou

School of Civil Engineering, Yantai University, Yantai 264005, China

摘要

摘要: 为进一步研究在实际工程中半浸泡环境下,混凝土暴露在空气中的部分遭受更为严重的侵蚀破坏现象,对比吸附区与浸泡区的劣化规律差异,设计了五种轴压比(0, 0.2, 0.3, 0.4, 0.5)和两种浓度的硫酸盐溶液(5%、10%)耦合作用下混凝土长期半浸泡和干湿循环试验,并设置全浸泡作用下的混凝土作为对照,对比吸附区和浸泡区的劣化规律差异,分析不同轴压荷载与硫酸盐浓度对质量、相对动弹性模量和抗压强度的影响。试验结果表明:相同龄期时所有组合吸附区混凝土的劣化程度均大于浸泡区以及全浸泡作用下的混凝土;低应力比在侵蚀龄期前期具有一定的抑制劣化的作用,较高的应力比和较大的硫酸盐浓度对试件的劣化具有明显的促进作用;在0.2和0.3轴压比的轴压荷载与5%浓度硫酸盐耦合作用下试件在300 d龄期的相对动弹性模量下降了12%和7%,在轴压比为0.5的轴压荷载与5%、10%浓度硫酸盐组合下则分别下降至38%和42%。
- 混凝土 /
- 轴压荷载 /
- 硫酸盐侵蚀 /
- 力学性能 /
- 浸泡方式
Abstract: In order to further study the semi-soaked environment in actual engineering, the part of concrete exposed to the air suffers from more serious erosion and damage, and the difference of the degradation law between the adsorption zone and the immersion zone, five kinds of stress ratio axial load and two concentrations of sulfate solution coupling under long-term semi-immersion and dry-wet cycle tests were designed, and the concrete under full immersion was set as a control. Comparing the difference of deterioration law between adsorption zone and immersion zone, analyzing the influence of different axial loads and sulfate concentration on mass, relative dynamic elastic modulus and compressive strength.The test results showed that the deterioration degree of concrete in all combined adsorption zones at the same age was greater than that in the immersion zone and full immersion, the low stress ratio had a certain effect of inhibiting deterioration on the early stage of erosion, and the higher stress ratio and larger sulfate concentration had a significant effect on the deterioration of the specimen. Under the coupling action of 0.2 and 0.3 ratio and 5% sulfate concentration, the relative dynamic elastic modulus of specimen in 300 d age decreased by 12% and 7%.The relative dynamic elastic modulus at 50% stress ratio and 5%, 10% sulfate coupling decreased to 38% and 42%.
- concrete /
- axial compression load /
- sulfate attack /
- mechanical properties /
- soaking method

HTML全文

参考文献(10)

逯静洲,林皋,肖诗云,等.混凝土材料经历三向受压荷载历史后抗拉强度劣化的研究[J].水利学报,2001(1):68-75.

左晓宝,孙伟.硫酸盐侵蚀下的混凝土损伤破坏全过程[J].硅酸盐学报,2009,37(7):1063-1067.

逯静洲,朱孔峰,田立宗,等.荷载-硫酸盐侵蚀作用后高强混凝土的力学特性[J].工业建筑,2018,48(3):11-16.

刘亚,逯静洲,朱孔峰,等.高强混凝土经轴压和硫酸盐侵蚀后的力学性能[J].长江科学院院报,2017,34(10):134-138.

刘赞群,李湘宁,侯乐,等.粉煤灰加剧半浸泡混凝土硫酸盐侵蚀的研究[J].建筑材料学报,2017,20(3):439-443

,448.

邢明亮,关博文,陈拴发,等.硫酸盐腐蚀与疲劳荷载联合作用下混凝土劣化特性[J].建筑材料学报,2013,16(2):249-254.

田立宗,逯静洲,朱孔峰,等.冻融循环与疲劳荷载作用下混凝土损伤研究[J].长江科学院院报,2018,35(2):140-144

,150.

田立宗.轴压荷载-硫酸盐侵蚀耦合作用混凝土长期性能研究[D].烟台:烟台大学,2018.

刘赞群,邓德华,GEERT D E,等."混凝土硫酸盐结晶破坏"微观分析(Ⅰ):水泥净浆[J].硅酸盐学报,2012,40(2):186-193.

曹健.轴压荷载下干湿循环-硫酸盐侵蚀耦合作用混凝土长期性能[D].北京:北京交通大学,2013.

施引文献

期刊类型引用(2)

1.	闫维明, 王瑾, 许维炳, 彭凌云, 张奎. 连接刚度对调频型颗粒阻尼器减震控制效果影响研究. 振动与冲击. 2018(03): 1-7 . 百度学术
2.	王瑾, 闫维明, 许维炳, 彭凌云, 张奎. 微细耗能颗粒对调频型颗粒阻尼器减震效果影响研究. 振动与冲击. 2017(13): 60-66+102 . 百度学术