«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

37卷

期数:

2020年06期

页码:

108-116

栏目:

出版日期:

2020-11-30

文章信息/Info

Title:

Study on Inhibitory Effect of Chlorine Salt on Sulfate Corrosion of Recycled Concrete

文章编号:

1673-2049(2020)06-0108-09

作者:

耿 欧^1,2,孙 倩^1,2,李大贺^1,2

1. 中国矿业大学 江苏省土木工程环境灾变与结构可靠性重点实验室,江苏 徐州 221116; 2. 中国矿业大学 力学与土木工程学院,江苏 徐州 221116

Author(s):

GENG Ou^1,2, SUN Qian^1,2, LI Da-he^1,2

1. Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

关键词:

再生粗骨料混凝土;  硫酸盐侵蚀;  氯盐;  抑制作用

Keywords:

recycled coarse aggregate concrete;  sulfate corrosion;  chlorine salt;  inhibitory effect

分类号:

TU502.5

DOI:

-

文献标志码:

A

摘要:

将再生骨料取代率为50%的混凝土试块自然浸泡在单一Na₂SO₄溶液、MgSO₄溶液和NaCl-Na₂SO₄复合溶液、NaCl-MgSO₄复合溶液中,其中复合溶液中的氯盐质量分数分别为0%,2%,5%和10%。在整个试验周期内,每隔30 d测量不同溶液中再生混凝土试块的表观形貌、超声声速和质量变化率,得出了氯盐对Na₂SO₄溶液和MgSO₄溶液侵蚀再生混凝土的抑制规律。最后结合试验结果,详细分析了氯盐抑制不同硫酸盐溶液侵蚀再生骨料混凝土相关性能差异的机理。研究结果表明:氯盐对再生混凝土的硫酸钠侵蚀有明显抑制作用,氯盐质量分数为5%时抑制效果最明显,但是氯盐质量分数继续增大,抑制效果没有明显的提高; 氯盐对硫酸镁溶液侵蚀再生混凝土的抑制效果较弱,甚至在氯化钠质量分数为2%时,再生混凝土试块表观侵蚀程度比未掺加氯化钠的还严重; 氯离子对硫酸根离子侵蚀有抑制作用,但是对镁离子的侵蚀无明显抑制作用; 所得结论为再生骨料混凝土在实际工程中的耐久性应用提供了借鉴。

Abstract:

The concrete test block with a recycled aggregate replacement ratio of 50% was naturally immersed in pure Na₂SO₄ solution, pure MgSO₄ solution, NaCl-Na₂SO₄ composite solution and NaCl-MgSO₄ composite solution, Wherein the chlorine salt concentration in the composite solution was 0%, 2%, 5% and 10% respectively. During the test cycle, the inhibition rules of chloride salt on Na₂SO₄ solution and MgSO₄ solution eroded recycled concrete were obtained by the apparent morphology, ultrasonic sound velocity and mass change rate of recycled concrete test blocks, which were measured every 30 d. Finally, combined with the test results, the mechanism of chlorine salt inhibiting the erosion of recycled aggregate concrete by different sulfate solutions was analyzed detailed. The research results show that chloride salt has significant inhibitory effect on sodium sulfate corrosion of recycled concrete, and the inhibitory effect is the most obvious when the concentration of chloride salt is 5%. But the concentration of chloride salt continues to increase, the inhibitory effect is not significantly improved. The inhibitory effect of solution erosion on recycled concrete is relatively weak, even when the sodium chloride concentration is 2%, the apparent corrosion degree of the recycled concrete test block is more serious than that without sodium chloride. It is found that the main reason is that chloride ions have inhibitory effect on sulfate ion erosion, but there is no obvious magnesium ions effect. It provides a reference for the durability application of recycled aggregate concrete in practical engineering.

参考文献/References:

[1] BEHERA M,BHATTACHARYYA S K,MINOCHA A K,et al.Recycled Aggregate from C & D Waste & Its Use in Concrete — A Breakthrough Towards Sustainability in Construction Sector:A Review[J].Construction and Building Materials,2014,68:501-516.
[2]BULATOVIC V,MELESEV M,RADEKA M,et al.Evaluation of Sulfate Resistance of Concrete with Recycled and Natural Aggregates[J].Construction and Building Materials,2017,152:614-631.
[3]马刚平,岳昌盛,王 荣,等.建筑垃圾再生骨料生产工艺及应用研究[J].环境工程,2013,31(3):116-117,143. MA Gang-ping,YUE Chang-sheng,WANG Rong,et al.Production Process and Application of Construction Waste Recycled Aggregate[J].Environmental Engineering,2013,31(3):116-117,143.
[4]申 健,牛荻涛,王 艳,等.再生混凝土耐久性能研究进展[J].材料导报,2016,30(3):89-94,100. SHEN Jian,NIU Di-tao,WANG Yan,et al.Durability Research Status of Recycled Aggregate Concrete[J].Materials Reports,2016,30(3):89-94,100.
[5]ZHOU C,CHEN Z.Mechanical Properties of Recycled Concrete Made with Different Types of Coarse Aggregate[J].Construction and Building Materials,2016,134:497-506.
[6]万兴成,宋志文,孙长达,等.再生混凝土抗硫酸盐侵蚀性能研究现状[J].绿色环保建材,2019(8):3-4. WANG Xing-cheng,SONG Zhi-wen,SUN Chang-da,et al.Research Status of Sulfate Resistance of Recycled Concrete[J].Green Environmental Protection Building Materials,2019(8):3-4.
[7]乔宏霞,路承功,李 宇,等.宁夏盐渍土地区现场暴露混凝土耐久性损伤评价试验[J].建筑科学与工程学报,2016,33(6):44-52. QIAO Hong-xia,LU Cheng-gong,LI Yu,et al.Experiment on Durability Damage Assessment of Concrete Field Exposed in Saline Soil Area of Ningxia[J].Journal of Architecture and Civil Engineering,2016,33(6):44-52.
[8]陈晓斌,唐孟雄,马昆林.地下混凝土结构硫酸盐及氯盐侵蚀的耐久性实验[J].中南大学学报:自然科学版,2012,43(7):2803-2812. CHEN Xiao-bin,TANG Meng-xiong,MA Kun-lin.Underground Concrete Structure Exposure to Sulfate and Chloride Invading Environment[J].Journal of Central South University:Science and Technology,2012,43(7):2803-2812.
[9]梁咏宁,黄君一,林旭健,等.氯盐对受硫酸盐腐蚀混凝土性能的影响[J].福州大学学报:自然科学版,2011,39(6):947-951. LIANG Yong-ning,HUANG Jun-yi,LIN Xu-jian,et al.The Effect of Chloride on Concrete Under Sulfate Attack[J].Journal of Fuzhou University:Natural Science Edition,2011,39(6):947-951.
[10]梁咏宁,袁迎曙.硫酸钠和硫酸镁溶液中混凝土腐蚀破坏的机理[J].硅酸盐学报,2007,35(4):504-508. LIANG Yong-ning,YUAN Ying-shu.Mechanism of Concrete Destruction Under Sodium Sulfate and Magnesium Sulfate Solution[J].Journal of the Chinese Ceramic Society,2007,35(4):504-508.
[11]SANTHANAM M,COHEN M D,OLEK J.Modeling the Effects of Solution Temperature and Concentration During Sulfate Attack on Cement Mortars[J].Cement and Concrete Research,2002,32(4):585-592.
[12]秦中伏,孙楠楠,温海珍.再生骨料混凝土的应用现状与研究进展[J].材料导报,2013,27(12):142-146. QIN Zhong-fu,SUN Nan-nan,WEN Hai-zhen.Application and Advancement of Recycled Aggregate Concrete[J].Materials Reports,2013,27(12):142-146.
[13]耿 健.硫酸盐侵蚀环境下再生细骨料砂浆的破坏机理[J].华中科技大学学报:自然科学版,2014,42(5):85-89. GENG Jian.Damage Mechanism of Sulfate Attack on Recycled Fine Aggregate Mortar[J].Journal of Huazhong University of Science and Technology:Natural Science Edition,2014,42(5):85-89.
[14]BERNDT M L.Properties of Sustainable Concrete Containing Fly Ash,Slag and Recycled Concrete Aggregate[J].Construction and Building Materials,2009,23(7):2606-2613.
[15]ARAFA M,TAYEH B A,ALQEDRA M,et al.Investigating the Effect of Sulfate Attack on Compressive Strength of Recycled Aggregate Concrete[J].Journal of Engineering Research and Technology,2017,4(4):137-143.
[16]QI B,GAO J M,CHEN F,et al.Evaluation of the Damage Process of Recycled Aggregate Concrete Under Sulfate Attack and Wetting-drying Cycles[J].Construction and Building Materials,2017,138:254-262.
[17]张 凯,陈亮亮,侍克斌.不同取代率再生骨料混凝土在硫酸盐侵蚀和冻融循环共同作用下的力学性能研究[J].科学技术与工程,2017,17(7):257-262. ZHANG Kai,CHEN Liang-liang,SHI Ke-bin.Study on Mechanical Property of Recycled Aggregate Concrete with Different Replacement Ratio Under the Combined Action of Sulfate Attack and Freeze-thaw Cycle[J].Science Technology and Engineering,2017,17(7):257-262.
[18]安新正,易 成,赵长彪,等.硫酸盐环境下再生混凝土的损伤演化研究[J].河北工程大学学报:自然科学版,2012,29(2):1-6. AN Xin-zheng,YI Cheng,ZHAO Chang-biao,et al.Research on the Damage Behaviors of the Recycled Aggregate Concrete in the Sulfate Environment[J].Journal of Hebei University of Engineering:Natural Science Edition,2012,29(2):1-6.
[19]周 纲,李少荣,王掌军,等.盐渍土地区混凝土腐蚀状况调查分析[J].建筑科学与工程学报,2011,28(4):121-126. ZHOU Gang,LI Shao-rong,WANG Zhang-jun,et al.Investigation and Analysis on Corrosion Situation of Concrete in Saline Soil Region[J].Journal of Architecture and Civil Engineering,2011,28(4):121-126.
[20]延永东,姚昌建,刘荣桂,等.氯盐环境下开裂混凝土耐久性研究进展[J].建筑科学与工程学报,2015,32(4):21-30. YAN Yong-dong,YAO Chang-jian,LIU Rong-gui,et al.Research Progress on Durability of Cracked Concrete Under Chloride Environment[J].Journal of Architecture and Civil Engineering,2015,32(4):21-30.

相似文献/References:

[1]程东辉,俞永志,董志鹏.无粘结预应力再生粗骨料混凝土梁力学性能[J].建筑科学与工程学报,2016,33(01):30.
　CHENG Dong-hui,YU Yong-zhi,DONG Zhi-peng.Mechanical Properties of Unbonded Prestressed Recycled Coarse Aggregate Concrete Beam[J].Journal of Architecture and Civil Engineering,2016,33(06):30.
[2]肖建庄,关湘烁,王佃超,等.再生混凝土碳排放因子研究[J].建筑科学与工程学报,2023,40(04):1.[doi:10.19815/j.jace.2022.07032]
　XIAO Jianzhuang,GUAN Xiangshuo,WANG Dianchao,et al.Researches on carbon emission factors of recycled concrete[J].Journal of Architecture and Civil Engineering,2023,40(06):1.[doi:10.19815/j.jace.2022.07032]

备注/Memo

备注/Memo:

收稿日期:2020-02-28 基金项目:国家自然科学基金项目(51972337) 作者简介:耿 欧(1973-),男,安徽萧县人,教授,工学博士,E-mail:ougeng@cumt.edu.cn。

常用功能

更新日期/Last Update: 1900-01-01