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High-efficiency Carbonation Modification Methods of Recycled Coarse Aggregates

Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 386-398页

作者：张美香 YANG Xiaolin 丁亚红 SUN Bo ZHANG Xianggang LÜXiuwen Department of Civil Engineering Henan Polytechnic UniversityJiaozuo 454150China College of Architectural Engineering Xinyu UniversityXinyu 336500China

To solve the problem of only surface carbonation and realize high-efficiency carbonation of recycled coarse aggregate,the method of carbonated recycled coarse aggregate with nano materials pre-soaking was first put *** carbonation effect of modified recycled coarse aggregate with three different carbonation methods was evaluated,and water absorption,apparent density and crush index of modified recycled coarse aggregate were *** with XRD,SEM,and MIP microscopic analysis,the high-efficiency carbonation strengthening mechanism of modified recycled coarse aggregate was *** experimental results show that,compared with the non-carbonated recycled coarse aggregate,the physical and microscopic properties of carbonated recycled coarse aggregate are *** method of carbonation with nano-SiO_(2) pre-soaking can realize the high-efficiency carbonation of recycled coarse aggregate,for modified recycled coarse aggregate with the method,water absorption is reduced by 23.03%,porosity is reduced by 44.06%,and the average pore diameter is 21.82 *** high-efficiency carbonation strengthening mechanism show that the pre-socked nano-SiO_(2) is bound to the hydration product Ca(OH)_(2) of the old mortar with nano-scale C-S-H,which can improve the CO_(2) absorption rate,accelerate the carbonation reaction,generate more stable CaCO_(3) and nano-scale silica gel,and bond to the dense three-dimensional network structure to realize the bidirectional enhancement of nano-materials and pressurized *** is concluded that the method of carbonation with nano-SiO_(2) pre-soaking is a novel high-efficiency carbonation modification of recycled coarse aggregate.

关键词： recycled coarse aggregate pressurized carbonation high-efficiency carbonation nano-SiO2 strengthening mechanism

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Mechanical Property and Microstructure of Cement Mortar with Carbonated Recycled Powder

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 689-697页

作者：丁亚红张美香 YANG Xiaolin XU Ping SUN Bo GUO Shuqi Department of Civil Engineering Henan Polytechnic UniversityJiaozuo 454150China College of Architectural Engineering Xinyu UniversityXinyu 336500China

Carbonated recycled powder as cementitious auxiliary material can reduce carbon emissions and realize high-quality recycling of recycled *** this paper,microscopic property of recycled powder with three carbonation methods was tested through XRD and SEM,the mechanical property and microstructure of recycled powder mortar with three replacement rates were studied by ISO method and SEM,and the strengthening mechanism was *** results showed that the mechanical property of recycled powder mortar decreased with the increasing of replacement *** is suggested that the replacement rate of recycled powder should not exceed 20%.The strength index and activity index of carbonated recycled powder mortar were improved,in which the flexural strength was increased by 27.85%and compressive strength was increased by 20%at the *** powder can be quickly and completely carbonated,and the improvement effect of CH pre-soaking carbonation was the *** activity index of carbonated recycled powder can meet the requirements of Grade II technical standard for recycled *** results revealed the activation mechanism of carbonated recycled powder such as surplus calcium source effect,alkaline polycondensation effect and carbonation enhancement effect.

关键词： recycled powder carbonation activation compound carbonation activity index mechanical property microstructure

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“双一流”建设背景下地方高校研究生创新能力培养问题探析与对策

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创新创业理论研究与实践 2024年第5期7卷 97-99页

作者：丁亚红洪紫杰张春生赵宇河南理工大学土木工程学院河南焦作454000

“双一流”建设不仅为部属高校研究生创新能力的培养提出了要求,也给地方高校研究生培养带来了压力。该文根据创新能力培养内涵,分析了地方高校目前存在的培养目标不明确、培养过程同质化、导师责任心不强等问题,探索了研究生培养目标... 详细信息

“双一流”建设不仅为部属高校研究生创新能力的培养提出了要求,也给地方高校研究生培养带来了压力。该文根据创新能力培养内涵,分析了地方高校目前存在的培养目标不明确、培养过程同质化、导师责任心不强等问题,探索了研究生培养目标顶层设计,构建了协同育人新模式,完善了创新培养过程管控机制,形成了多元化研究生培养质量评价体系等,并通过实践取得了较好的创新成果,为“双一流”建设背景下地方高校研究生创新能力培养提供借鉴。

关键词：研究生创新能力高等教育培养国家需求 “双一流”

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Treatment Methods for the Quality Improvement of Recycled Concrete Aggregate (RCA)–A Review

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Journal of Wuhan University of Technology(Materials Science) 2021年第1期36卷 77-92页

作者： ding yahong WU Jun XU Ping ZHANG Xianggang FAN Yuhui Department of Civil Engineering Henan Polytechnic UniversityJiaozuo 454003China

For the purpose of providing references for further research and practical application about the quality improvement of RCA,in this paper,various treatment methods were firstly classified into four categories:removing old mortar (OM),strengthening OM,multi-stage mixing methods,and combination ***,the improvement mechanisms and important conclusions of various treatment methods were elucidated and summarised *** the section of discussion,the improved effects as well as advantages and disadvantages of various treatment methods were compared and discussed respectively,and recommendations for the selection of treatment methods were ***,the further research directions were pointed out,and an integrative programme on the quality improvement of RCA was recommended.

关键词： RCA treatment methods removing OM strengthening OM interfacial transition zone(ITZ)

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Biocompatibility studies of silk fibroin-based artificial nerve grafts in vitro and in vivo

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Progress in Natural Science:Materials International 2007年第9期17卷 1029-1034页

作者： Chen Xuemei,Yang Yumin,Wu Jian,Zhao yahong,ding Fei and Gu Xiaosong(Jiangsu Key Laboratory of Neuroregeneration,Nantong University,Nantong 226001,China) Jiangsu Key Laboratory of Neuroregeneration Nantong University Nantong 226001 China

Silk fibroin(SF)has been used extensively in the biomedical field including tissue engineering for the generation of artificial bones,skins or *** have previously reported on good in vitro biocompatibility of SF fibers with peripheral nerve tissues and *** the present study,we developed a novel design of the SF-based artificial nerve graft(SF graft)which was composed of a SF-nerve guidance conduit(NGC)inserted with SF *** assay was performed to determine the cytotoxicity of the SF-NGC extract fluid on the cultured L929 cells derived from an immortalized mouse fibroblast cell *** addition,this SF graft was implanted into adult rats for bridging a 10-mm long sciatic nerve *** following-up experiments at initial stage(1-4 week)of nerve regeneration including routine blood tests and histochemical investigation were conducted to evaluate the in vivo biocompatibility of the SF graft with peripheral *** results demonstrated that the SF-NGC graft was biocompatible with the surrounding tissues and cells due to its low inflammatory potential with a grade 0 under the *** guidelines and it was generally suitable to a certain degree for bridging peripheral nerve defects in virtue of supporting Schwann cell adherence,expansion and *** the SF graft is a promising alternative to classical autografts for peripheral nerve repair.

关键词： silk fibroin artificial nerve graft nerve guidance conduit biocompatibility cytotoxicity

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Quality Improvement of Recycled Concrete Aggregate by Accelerated Carbonation under Different Pressure

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Journal of Wuhan University of Technology(Materials Science) 2023年第3期38卷 623-631页

作者：丁亚红武军 ZHANG Xianggang XU Ping NING Wei LI Yajing School of Civil Engineering Henan Polytechnic UniversityJiaozuo 454003China School of Civil Engineering and Architecture XinxiangUniversityXinxiang453003China

Due to the presence of old mortar (OM) and interfacial transition zone (ITZ),recycled concrete aggregate (RCA) is inferior to natural aggregate (NA).The purpose of this paper was to study the effect of accelerated carbonation on the macro-properties and micro-properties of RCA under different pressure(0.05,0.15,0.30 MPa).The macro-property tests included colour change,apparent density,water absorption,and crushing value of *** micro-property tests included scanning electron microscopy (SEM),X-ray diffraction (XRD),thermogravimetry-differential scanning calorimetry (TG-DSC),and Vickers micro-hardness(VMH).The results showed that the change trends of apparent density,water absorption,and crushing value of RCA displayed exponential relationships as pressure increasing,with the optimum pressure of 0.30 *** images indicated that the calcite caused by the hydration products in RCA and the Ca(OH)_(2) derived from saturated lime water improved the properties of RCA;as the apparent density increased,the water absorption and crushing value *** results of XRD and TG-DSC indicated that,as the pressure increased,the masses of Ca(OH)_(2) in carbonated RCA gradually decreased,while those of CaCO_(3) gradually increased,which demonstrated that the carbonation degree gradually ***,ITZ-2 was the weakest phase in RCA,but its improvement degree of VMH by accelerated carbonation was higher than that of ***,RCA was not completely carbonated,but only carbonated in a certain depth after 24 h accelerated carbonation.

关键词： recycled concrete aggregate treatment method accelerated carbonation interfacial transition zone saturated lime water calcite

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粘贴玻璃钢板补强混凝土梁徐变特性初探

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四川建筑科学研究 2006年第6期32卷 81-85页

作者：曾宪桃丁亚红河南理工大学土木建筑工程系

在对16片粘贴玻璃钢板补强的混凝土梁进行动静载试验后,得到了粘贴于混凝土梁受拉区的玻璃钢板的应变与混凝土梁主筋应变满足准平面假定的基础上,考虑混凝土徐变、收缩和玻璃钢板徐变情况下,对补强梁的徐变特性进行了分析、计算,结果表... 详细信息

在对16片粘贴玻璃钢板补强的混凝土梁进行动静载试验后,得到了粘贴于混凝土梁受拉区的玻璃钢板的应变与混凝土梁主筋应变满足准平面假定的基础上,考虑混凝土徐变、收缩和玻璃钢板徐变情况下,对补强梁的徐变特性进行了分析、计算,结果表明,对补强加固梁进行徐变分析是必要的。徐变、收缩引起混凝土材料应变约有29%的增长量,补强梁的截面曲率约有15%的变化。

关键词：玻璃钢混凝土梁徐变

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预浸石灰水碳化再生粗骨料混凝土的力学性能

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建筑材料学报 2022年第11期25卷 1143-1150页

作者：张春生李雅婧丁亚红武军宁威河南理工大学土木工程学院河南焦作454003

采用预浸石灰水碳化法对再生粗骨料进行强化处理,对强化前后再生粗骨料物理性能进行检测,研究了碳化再生粗骨料对混凝土力学性能的影响.同时结合微观测试手段,分析碳化对再生粗骨料的增强机理.通过立方体抗压、劈裂抗拉及抗折强度试验,... 详细信息

采用预浸石灰水碳化法对再生粗骨料进行强化处理,对强化前后再生粗骨料物理性能进行检测,研究了碳化再生粗骨料对混凝土力学性能的影响.同时结合微观测试手段,分析碳化对再生粗骨料的增强机理.通过立方体抗压、劈裂抗拉及抗折强度试验,研究强化后混凝土各龄期强度变化.结果表明:预浸石灰水碳化法能够显著改善再生粗骨料的物理性能,其吸水率降低15.2%~22.9%,压碎值降低15.2%~17.7%;碳化后粗骨料的界面过渡区更加密实,有利于再生粗骨料品质的提升;7、28 d的混凝土强度随粗骨料取代率的增大而降低;当粗骨料取代率为50%时,预浸石灰水碳化再生混凝土强度与普通混凝土相当.

关键词：再生粗骨料碳化强化石灰水预浸泡微观结构力学性能

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内嵌螺旋肋钢丝抗弯加固混凝土梁试验研究

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辽宁工程技术大学学报（自然科学版） 2009年第6期28卷 949-952页

作者：丁亚红李慧敏曾宪桃河南理工大学土木工程学院河南焦作454000

为探讨更为有效的混凝土梁加固方法,通过7根梁试件的静力加载试验,对内嵌螺旋肋钢丝加固混凝土梁的受力过程、抗弯承载力、裂缝和变形情况等进行较为系统的研究。结果表明:所有内嵌螺旋肋钢丝加固的混凝土梁没有出现类似外贴纤维片材加... 详细信息

为探讨更为有效的混凝土梁加固方法,通过7根梁试件的静力加载试验,对内嵌螺旋肋钢丝加固混凝土梁的受力过程、抗弯承载力、裂缝和变形情况等进行较为系统的研究。结果表明:所有内嵌螺旋肋钢丝加固的混凝土梁没有出现类似外贴纤维片材加固构件的剥离破坏现象。与未加固梁相比,该加固方法能够显著提高被加固梁的极限承载力,且提高幅度随加固量的增加而增加,最多可达144.2%。加固梁破坏时的裂缝间距、最大裂缝宽度、挠度都较被加固梁小。加固梁的刚度有明显提高。研究成果为该新型加固技术在工程中应用提供了依据。

关键词：螺旋肋钢丝内嵌加固混凝土梁弯曲试验

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甲型流感病毒H7N9血凝素单克隆抗体的制备及保护性研究

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科学通报 2018年第11期63卷 1024-1034页

作者：丁亚红李梅舒祥杨月莲石玮陈则上海生物制品研究所有限责任公司上海200051 中国生物技术股份有限公司北京100029

以H7N9甲型流感病毒(A/Shanghai/2/2013)全病毒灭活疫苗原液为免疫原免疫BALB/c小鼠,采用杂交瘤技术制备抗甲型流感病毒H7N9血凝素(HA)的单克隆抗体.通过ELISA和血凝抑制(HI)试验初步筛选单克隆抗体,筛选后的Ig G类单克隆抗体用中和试... 详细信息

以H7N9甲型流感病毒(A/Shanghai/2/2013)全病毒灭活疫苗原液为免疫原免疫BALB/c小鼠,采用杂交瘤技术制备抗甲型流感病毒H7N9血凝素(HA)的单克隆抗体.通过ELISA和血凝抑制(HI)试验初步筛选单克隆抗体,筛选后的Ig G类单克隆抗体用中和试验检测其中和活性.将有中和活性的单抗通过小鼠体内法大量制备腹水,腹水经亲和层析柱纯化后进行特异性及稳定性检测.同时在小鼠模型中进行了HA单克隆抗体抵抗同源流感病毒感染的预防性和治疗性实验,通过观察小鼠的症状并统计小鼠的存活率、体重变化和肺部病毒滴度等指标发现单抗6A3在预防性和治疗性实验中都可以有效地抵抗H7N9流感病毒的感染.显著降低肺部病毒滴度,对小鼠提供100%的保护.甲型流感病毒H7N9血凝素单克隆抗体的成功制备为进一步研究H7N9流感病毒血凝素的抗原表位及治疗诊断试剂的开发奠定了基础.

关键词：流感病毒 H7N9 血凝素单克隆抗体

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