孔隙结构对掺加陶瓷粉混凝土抗冻性的影响

刘紫玫; 姚占全; 王宗熙; 吴晗晗

doi:10.13204/j.gyjzG20032908

孔隙结构对掺加陶瓷粉混凝土抗冻性的影响

doi: 10.13204/j.gyjzG20032908

内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018

基金项目:

内蒙古农业大学博士科研启动基金项目（BJ2014-4）。

详细信息

作者简介:
刘紫玫,女,1996年出生,硕士。

通讯作者:
姚占全,男,工学博士,教授,ndyzq@imau.edu.cn。

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- 文章访问数: 131
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-29
- 网络出版日期: 2021-06-04

EFFECT OF PORE STRUCTURE ON FROST RESISTANCE OF CONCRETE MIXED WITH CERAMIC POWDER

College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China

摘要

摘要: 利用陶瓷粉作掺料替代水泥，复掺矿粉配制混凝土，对其每25次冻融循环后测定混凝土质量、抗压强度以及动弹性模量，分析其抗冻性，建立冻融损伤模型并进行寿命预测，通过核磁共振（NMR）测试分析混凝土冻融前后微观孔隙特征，引入灰熵理论将微观孔隙结构与混凝土耐久性联系起来，得到影响陶瓷混凝土抗冻性的主要影响因素，并在此基础上建立冻融后混凝土抗压强度预测GM模型。结果表明：冻融循环后期掺加陶瓷粉的混凝土质量、强度以及弹性模量损失较小，抗冻耐久寿命最高可达到32年；混凝土T₂谱面积、孔隙度、自由流体饱和度以及大孔径孔隙随冻融循环的进行而增大，陶瓷粉加入可减轻孔隙结构劣化程度；主要影响陶瓷粉混凝土抗冻性的孔隙特征参数为孔隙度、束缚流体饱和度和0.05~0.2 μm孔径，由此建立的GM模型的平均相对误差为4.43%。
- 混凝土 /
- 陶瓷粉 /
- 抗压强度 /
- 冻融循环 /
- 核磁共振 /
- 灰熵
Abstract: Ceramic powder is used as an admixture to replace cement, and then mixed with mineral powder to prepare concrete. The mass, compressive strength and dynamic elastic modulus of concrete were determined to analyze the frost resistance after 25 freeze-thaw cycles. The freeze-thaw damage model was established to forecast durability life. Nuclear magnetic resonance (NMR) test was carried out to analyze the microporosity characteristics of concrete after freeze-thaw cycles. The grey entropy analysis was introduced to link micro-pore structure with concrete durability, and the main factors affecting the frost resistance of the concrete mixed with ceramic powder were obtained pore structure to frost resistance. On this basis, the prediction model of compressive strength after freeze-thaw cycles was established.The results showed that the loss of mass, compressive strength and dynamic elasticity modulus of concrete mixed with ceramic powder was less at the later stage of freeze-thaw cycles. The maximum durability frost-resistant life could reach 32 years. T₂ spectrum area, porosity, free fluid saturation and larger size pore ratio increased with freeze-thaw cycles.The addition of ceramic powder could reduce the deterioration of pore structure.The pore characteristic parameters that mainly affected the frost resistance of ceramic powder concrete were porosity, bound fluid saturation and the pore size of 0.05 to 0.2 μm, and the average relative error of the GM model was 4.43%.
- concrete /
- ceramic powder /
- compressive strength /
- freeze-thaw cycles /
- nuclear magnetic resonance /
- grey entropy

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参考文献(29)

中国建筑业协会混凝土分会.2010年我国部分省、市、自治区预拌混凝土企业生产情况统计表[J].混凝土,2011,258(4):144.

中国建筑业协会混凝土分会.2018年我国部分省、市、自治区预拌混凝土产量统计表[J].混凝土,2019,354(4):160.

吴中伟.高性能混凝土:绿色混凝土[J].混凝土与水泥制品,2000(1):3-6.

RADILINSKI M,HARRIS N J,MONCARZ P D.Sustainable Concrete:Impacts of Existing and Merging Materials and Technologies on Construction Industry[C]//AEI 2011:Building Integrated Solutions.Reston:ASCE,2011:252-262.

曾令可,金雪莉,刘艳春,等.陶瓷废料回收利用技术[M].北京:化学工业出版社,2010:5-6.

NURAN A, MEVLUT U. The Use of Waste Ceramic Tile in Cement Production[J].Cement Concrete Research, 2000,30(3):497.

黄丹,王功勋,卢胜男,等.水热条件下陶瓷抛光砖粉的水化活性[J].硅酸盐通报,2016, 35(2):561-567.

陈梦成,方苇,许开成.陶瓷掺合料对水泥胶砂性能的影响研究[J].硅酸盐通报,2015,34(3):793-798.

李星.混凝土掺合料中应用陶瓷抛光砖粉分析[J].中国高新技术企业,2017,395(8):100-101.

段明磊,肖强,程智清,等.陶瓷粉和石灰石粉双掺对混凝土性能的影响研究[J].混凝土与水泥制品,2013,8(8):5-8.

杨才千,刘飞,潘勇,等.冻融循环作用下聚乙烯醇纤维增强快硬混凝土的力学性能[J].东南大学学报(自然科学版),2019,49(2):334-339.

王晨霞,刘路,曹芙波,等.冻融循环后再生混凝土力学性能的试验研究[J/OL].建筑结构学报,2020,41(12):193-202.

石正国,王黎.陶瓷抛光砖粉在C30混凝土中的应用[J].混凝土,2012,269(3):138-140.

丁一宁,董慧文,曹明莉.陶瓷废弃物粉末火山灰活性的研究[J].建筑材料学报,2015,18(5):867-872.

刘崇熙,汪在芹.坝工混凝土耐久寿命的衰变规律[J].长江科学院院报,2000,17(2):18-21.

邹英超,赵娟,梁锋,等.冻融作用后混凝土力学性能的衰减规律[J].建筑结构学报,2008,29(1):117-123

,138.

武海荣,金伟良,延永东,等.混凝土冻融环境区划与抗冻性寿命预测[J].浙江大学学报(工学版),2012,46(4):650-657.

CANO-BARRITA P F J,CASTELLANOS F,RAMÍREZ-ARELLANES S,et al.Monitoring Compressive Strength of Concrete by Nuclear Magnetic Resonance, Ultrasound, and Rebound Hammer[J]. ACI Materials Journal,2015,112(1):147-154.

WANG X X,SHEN X D,WANG H L,et al.Nuclear Magnetic Resonance Analysis of Concrete-Lined Channel Freeze-Thaw Damage[J].Journal of the Ceramic Society of Japan,2015,123(433):43-51.

薛慧君,申向东,邹春霞,等.基于NMR的风积沙混凝土冻融孔隙演变研究[J].建筑材料学报,2019,22(2):199-204.

赵杰,姜亦忠,王伟男,等.用核磁共振技术确定岩石孔隙结构的实验研究[J].测井技术,2003,27(3):185-188.

TYROLOGOU P,DUDENEY A W L,GRATTONI C A.Evolution of Porosity in Geotechnical Composites[J].Magnetic Resonance Imaging,2005,23(6):765-768.

李杰林,周科平,张亚民,等.基于核磁共振技术的岩石孔隙结构冻融损伤试验研究[J].岩石力学与工程学报,2012,31(6):1208-1214.

刘倩,申向东,薛慧君,等.基于核磁共振技术对不同粗骨料混凝土孔隙特征实验研究[J].功能材料,2017,48(10):10066-10070.

刘卫,邢立.核磁共振录井[M].北京:石油工业出版社,2011:26-32.

吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999.

WANG X,SHEN X,WANG H,et al.Nuclear Magnetic Resonance Analysis of Freeze-Thaw Damage in Natural Pumice Concrete[J].Materiales de Construccion,2016,322(66):DOI: 10.39891mc.2016.09014.

祝斯月,陈拴发,秦先涛,等. 基于灰关联熵分析法的高粘改性沥青关键指标[J].材料科学与工程学报,2014,32(6):863-867.

刘思峰,杨英杰,吴利丰,等.灰色系统理论及其应用[M]. 北京:科学出版社,2014.

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