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| 1 | 声发射技术在混凝土材料及其耐久性中的应用研究进展显示文摘声发射技术作为一项有效的无损检测方法,在混凝土材料研究中有着独特的优势。介绍了声发射基本原理及常用的声发射设备,总结了声发射技术在混凝土材料及其耐久性中的应用情况,最后展望了声发射技术在混凝土材料耐久性中的应用前景。 | 韩建德 刘金龙 王曙光 刘伟庆 金敏霞 | 2014 | 材料导报(纳米与新材料专辑)2014，28，1： | 7 |
| 2 | Multi-scale finite element analysis of chloride diffusion in concrete incorporating paste/aggregate ITZs显示文摘In this paper,we propose a concurrent multi-scale finite element(FE) model coupling equations of the degree of freedoms of meso-scale model of ITZs and macroscopic model of bulk pastes.The multi-scale model is subsequently implemented and integrated into ABAQUS resulting in easy application to complex concrete structures.A few benchmark numerical examples are performed to test both the accuracy and efficiency of the developed model in analyzing chloride diffusion in concrete.These examples clearly demonstrate that high diffusivity of ITZs,primarily because of its porous microstructure,tends to accelerate chloride penetration along concentration gradient.The proposed model provides new guidelines for the durability analysis of concrete structures under adverse operating conditions. | GUO Li GUO XiaoMing MI ChangWen | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，9： | 5 |
| 3 | Effect of Friction Reclaimed Materials of Waste Brake-shoe on Basic Performance of Mortar显示文摘Discarded train brake shoes mainly consist of steel-backed friction material. To be better reutilized, its essential features and its interaction in cement-based material need to be studied. Consequently, particle size analysis, SEM, IR and TGA were used to investigate two types of waste brake shoes, i e, mechanical grinding friction reclaimed material of waste brake-shoe(G-FRMWBS) and pyrolysis-friction reclaimed materials of waste brake-shoe(P-FRMWBS). The latter exhibited less organic content, larger range of particle size distribution and smaller medium particle diameter. Both types contained inorganic particles of spherical and irregular shapes, striped with steel fiber. Upon isometric substituting fine aggregates, G-FRMWBS lifted the strength of mortar effectively that was increased by 16.6% and 17.5% when the replacing rate was 5%; the value went up to 19.2% and 19.2% when the replacing rate was 10%. Moreover, inclusion of FRMWBS enhanced the chloride penetration resistance, and optimized the pore characteristic and ITZ(interfacial transition zone) as well. | 王彩辉 HUANG Dongjie FU Hua WU Hongya QIN Guoqiang SUN Guowen GUO Na | 2017 | Journal of Wuhan University of Technology(Materials Science)2017，32，3： | 3 |
| 4 | Deterioration of dynamic mechanical property of concrete with mineral admixtures under fatigue loading显示文摘The dynamic mechanical property of concrete is one of the key parameters,which greatly influences durability of infrastructures subjected to continuous heavy loading,such as girder and track slab of high-speed railway foundation structure.This paper reports serials of experiments designed to investigate the deterioration of dynamic mechanical properties of different concretes under fatigue loading condition.Four parameters including relative dynamic elastic modulus(RDEM),relative dynamic shear modulus(RDSM),relative compressive strength(RCS)and water absorption(WA)of concrete were evaluated to assess the dynamic properties and microstructures of concretes.Results show that the fatigue stress levels and fatigue cycle durations significantly influence the dynamic mechanical properties of concrete including dynamic elastic modulus and dynamic shear modulus.Addition of proper mineral admixture can improve the dynamic mechanical characteristics of concrete and increase its resistance against the fatigue loading effect.Keeping the amount of mineral admixture in concrete constant,its dynamic mechanical property with fly ash is lower than that with fly ash and silica fume.The water absorption in concrete,which is an indirect parameter reflecting capillary porosity,increases evidently after bearing fatigue-loading.There is a close correlation between the deterioration of dynamic mechanical property and the increasing of water absorption of concrete.This indicates that the damage of microstructure of concrete subjected to fatigue loading is the indispensable reason for the decay of its dynamic mechanical performance. | MA KunLin XIE YouJun LONG GuangCheng TAN WenYong | 2014 | Science China(Technological Sciences)2014，57，10： | 2 |
| 5 | 疲劳损伤混凝土结构耐久性研究进展显示文摘混凝土结构在其生命总周期内要受到各种环境与荷载的耦合作用。疲劳荷载会使混凝土内部损伤不断累积、开裂,从而影响氯离子在混凝土内的输运规律与钢筋混凝土结构的耐久性能,使得混凝土结构在受荷水平不是很高时可能引发结构的提前失效,因此,氯盐环境与疲劳荷载耦合作用下混凝土材料与结构的耐久性能需要着重考虑。文中总结与分析了目前国内外关于压缩与弯曲疲劳荷载作用下混凝土中氯离子渗透性试验方法与渗透性变化规律,氯盐环境与疲劳荷载共同作用下的钢筋混凝土结构耐久性试验方法与研究进展,指出了现阶段相关研究存在的不足以及后续可以深入开展的研究。 | 王海龙 黄启军 孙晓燕 | 2014 | 低温建筑技术2014，36，7： | 1 |
| 6 | 近海大气环境下砖砌体组合墙抗震性能试验显示文摘为研究近海大气环境下构造柱-圈梁约束砖砌体组合墙的抗震性能,以4榀组合单墙片和4榀组合双墙片试件作为研究对象,对试件进行了室内加速腐蚀试验,进而对其进行低周往复加载试验,观察砖砌体组合墙试件的破坏过程与特征,分析腐蚀循环作用对其荷载-位移滞回曲线、骨架曲线、刚度退化和耗能能力等抗震性能的影响.试验结果表明:试件破坏形式最终均为脆性剪切破坏;腐蚀循环作用对砖砌体组合墙试件的破坏形态有一定影响;随着腐蚀循环次数的增加,试件的极限承载力、初始刚度、耗能能力均表现出不同程度的退化;组合双墙片试件的抗震性能优于组合单墙片试件,其材料性能得以较为充分地发挥,墙体内应力分布更加均匀,刚度退化速率相对较慢. | 郑山锁 郑淏 牛丽华 明铭 | 2018 | 华中科技大学学报(自然科学版)2018，46，11： | 0 |
| 7 | 矿渣-高贝利特硫铝酸盐水泥复合体系抗氯离子渗透性研究显示文摘通过氯离子扩散系数、氯离子结合能力、MIP、XRD、TG-DSC、SEM研究了矿渣掺量对高贝利特硫铝酸盐复合体系抗氯离子渗透性能的影响,并对机理进行了分析。结果表明:随着矿渣掺量的增加,复合体系的氯离子扩散系数先减小后增大,当矿渣掺量为20%时,氯离子扩散系数最低,为98.7×10^(-14) m^2/s;进一步研究发现,高贝利特硫铝酸盐水泥促进了矿渣的火山灰反应,提高了CS-H凝胶的生成量,提高了氯离子的结合能力,降低了水化产物结构的孔隙率。 | 兰明章 蔡永慧 靳耀乐 葛仲熙 刘承建 王剑锋 | 2018 | 新型建筑材料2018，45，11： | 0 |
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