粉煤灰综合利用 2010No.5 FLY ASH COMPREHENSIVE UTILIZATION 题研究 磷渣粉对机制砂混凝土性能影响研究 Study the Influence of Phosphorous Slag Powder on Properties of Concrete with Machine-made Sand 蒋正武,徐海源,王君菊2 (1.同济大学先进土木工程材料教育部重点实验室,上海2000922.北京城建建材工业有限公司,北京100049) 摘要研究了不同掺量下磷渣粉对C30、C60强度等级机制砂混凝土的工作性与力学性能影响并与同掺量的粉煤 灰机制砂混凝土进行了比较。研究表明,磷渣粉具有一定的减水作用,能有效改善机制砂混凝土的工作性能,对高强度 等级机制砂混凝土更为明显。掺入磷渣粉后,不同强度等级机制砂混凝土早期抗压强度均较基准混凝土低,且随着掺量 增大强度下降明显各掺量下C30磷渣粉机制砂混凝土后期强度均较基准混凝土高,而C60混凝土后期强度与掺量有 关。与同掺量粉煤灰混凝土相比,磷渣粉机制砂混凝土初始落度及各龄期抗压强度均较高。 关键词:磷渣粉;机制砂;工作性;抗压强度;早期 中分类号:TU528.041 文献标识码:A 文章编号:1005-8249(2010)05-0010-04 JIANG Zheng - wu',Xu -yuan' ,Wang Jun - ju 1 .Key Laboratory of Advanced Civil Engineering Materials of Ministry Education ,Tongji University ,Shanghai 200092 ,China 2 .Beijing Urban Construction Material Industry Co ,Ltd ,Beijing 100049 ,China Abstract :The paper investigated the influence of phosphorous slag powder on workability and mechanical properties C30 and C60 concrete with machine - madesand ,and pared it with fly ash .The results ahow that phosphorous slag powder has water reducing and improve the workability of concrete with machine-made sand ,especially for high strength concrete .The early stage pres...
施工技术 2010年11月 CONSTRUCTION TECHNOLOGY 第39卷第11期 碳纤维布加固铝合金方管试验研究与有限元分析 刘桐张继红2,刘友忠3 (1.盐城工学院土木工程学院,江苏盐城224051;2.盐城市建设局建筑业处,江苏盐城224000 .江苏国丰建设集团有限公司,江苏盐城224000) [摘要]简要叙述碳纤维布加固铝合金方管简支梁的试验材料材性试验与试验方案,结合本次试验的结果分析,用 碳纤维布对铝合金方管进行加固,可以提高其极限承载力,抑制梁跨中挠度的发展。通过非线性有限元理论分析, 理论值与试验实测值吻合、曲线变化规律一致 [关键词]材性试验;碳纤维布;铝合金方管;有限元分析 [中图分类号]TU39.05 文献标识码]A 文章编号]1002-8498(2010)11-0030-04 Experiment Study and Finite Element Analysis of Square Aluminum Alloy Tube Strengthened with CFRP Liu Tong' ,Zhang Jihong ,Liu Youzhong ( 1.College of Engineering ,Yancheng Institute of Technology ,Yancheng ,Jiangsu 224051 ,China ; 2 .Construction Department ,Yancheng Bureau of Construction ,Yancheng ,Jiangsu 224000 ,China 3 .Jiangsu Guofeng Construction Group Limited Company ,Yancheng ,Jiangsu 224000 ,China ) Abstract :The authors briefly describe material quality testing and experiment plan of the square aluminum alloy tube simply supported beam stengthened with CFRP .This experiment shows that the ultimate bearing capacity of square aluminum alloy tube beam can be improved ,and the mid-span deflection of beam can be inhibited .By non-linear theory of finite element analysis ,the theoretical value and experimental va...
工技术 2015年2月下 CONSTRUCTION TECHNOLOGY 序44卷第4期 do:10.7672/sgjs2015040032 碳纤维布加固钢结构吊车梁施工技术 李彪,彭铁红2,杨勇新,岳清瑞,陈鹏飞13,廉杰,赵进阶 (1.中冶建筑研究总院有限公司,北京1000882.中国冶金科工股份有限公司, 北京1000283.西南科技大学,四川绵阳621000 [摘要]碳纤维布加固钢结构技术在实际工程中应用的实例有限,无现成标准、规范可循,特别是工业建筑吊车梁 加固工程,施工环境条件恶劣,结构工作环境存在高温及粉尘,施工周期受到生产的严格限制,通过对选材、工艺优 化等研究,形成了一套钢结构加固修复的施工关键技术和后期验收方法,有效地保证了施工工期、质量和安全。 [关键词]碳纤维布;加固;钢结构;施工技术 [中图分类号]TU756.4 [文献标识码] [文章编号]1002-8498(2015)04-0032-04 Key Technology of Steel Crane Beam Strengthened with CFRP Sheet Li Biao' ,Peng Tiehong ,Yang Yongxin' ,Yue Qingrui Chen Pengfei .Lian Jie' ,Zhao Jinjie ( 1.Central Research Institute of Building and Construction Co ..MCC ,Beijing 100088 ,China ; 2 .China Metallurgical Group Corporation ,Beijing 100028 ,China 3 .Southwest Unitersity of Science and Technology ,Mianyang ,Sichuan 621000 ,China ) Abstract :The technology of steel strengthened with CFRP sheet is limited the practical engineering . No ready-made standard can be followed in the project .Especially in the industrial construction crane beam reinforcement engineering ,construction environment condition is poor ,structure work environment is in high temperature and dust ,construction period is strictly limited by...
[关键词]加固;扩展有限元法;碳纤维布;界面应力;损伤;开裂 [中图分类号】TU398;TU532 [文献标识码]A [文章编号〕1002-8498(2013)16-0005-03 Mechanical Analysis of theFlexural Steel BeamsStrengthenedwith CFRP Wang Chunjang',Li Xiangmin²,HouFengguo',XuQingfeng²,Jiang Zhenyu (1.School of Nasal Architecture,Oean&CivilEngineering,ShanghaiJiaotong University, Shanghai 200240,China;2. ShanghaiKey Laboratory ofNew Technology for Engineering Structures,SRIBS,Shanghai 200032,China) Abstract:In this paper, the authors pared experiments of H-shape beams strengthened with CFRP in two different loading conditions and different reinforcement scheme.The test results were synthesized in details.On the base of above extended finite element method(XFEM),the numerical model for H-shape flexural steel beams with initial crack strengthened with CFRPwere given out.The ultimate load bearing capacity,glue interfacial stress and crack analysis were presented for the bonded models with different initial damage and without initial damage. The test and analysis results demonstrate that XFEM model is applicable for the mechanical analysis of flexural steelbeams strengthened with CFRP. Key words;strengthening;XFEM;CFRP;interface stress; damage;crack 碳纤维增强复合材料(CFRP)因具有轻质高 本文基于扩展有限元方法(XFEM),采用黏聚 强、防腐耐久、方便施工、适用面广等优点,在工程力模型",并假定胶层与翼缘以及胶层与CFRP布 加固中得到广泛应用。
工技术 2016年11月下 88 CONSTRUCTION TECHNOLOGY 第45卷第22期 do:10.7672/sgjs2016220088 碳纤维加固技术规范的比较研究 杨峰斌,晋娟茹2 (1.山西路桥建设集团有限公司,山西太原030006;2.建研科技股份有限公司,北京100013) [摘要]碳纤维加固技术由于具有高强轻质、施工便捷、粘贴后基本不增加原结构自重及构件尺寸等优点,在混凝 土结构加固中得到了大量应用。目前碳纤维加固依据的标准规范主要有《混凝土结构加固设计规范》GB50367- 2013及纤维增强复合材料建设工程应用技术规范》GB506082010两本规范对碳纤维加固设计的计算及相关 规定有一定差异,本文对两本规范进行对比研究。 关键词]既有建筑加固碳纤维;规范;研究 中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2016)22-0088-03 Compare Study of Two Carbon Fiber Reinforcement Technology Codes Yang Fengbin' ,Jin Juanru ( 1.Shanxi Road and Bridge Construction Co ..Taiyuan ,Shanxi 030006 ,China : 2 .CABR Technology Co .,Ltd .100013 ,China ) Abstract :Carbon fiber reinforcement technology is widely used in concrete reinforcement project because of high strength light weight .easy construction and not changing structure self weight and member's dimension after reinforcement .At present ,the main standards for carbon fiber reinforcement have Code of design of strengthening concrete structure GB50367-2013 and Technical code for infrastructure application of FRP posites GB50608-2010 .The two codes have different items on calculation of FRP reinforcement design and relative rules .The paper pares and st...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2014o.1 专题研究 碱激发剂对粉煤灰加气混凝土性能的影响 Effect of Alkali-activator on Performance of Fly Ash Aerated Concrete 周卫兵,孙正,朱教群,朱惠英2 (1.武汉理工大学材料科学与工程学院,湖北武汉430070;2.广西建筑科学研究设计院,广西南宁530011) 商要:采用Na2SiO3作碱激发剂提高加气混凝土中粉煤灰的活性,比较激发前后加气混凝土物理性能的变化。通 过XRD和SEM方法研究水化产物的物相组成和显微形貌。结果表明:Na2SiO3能够显著提高加气混凝土的抗压强度;激 发后,粉煤灰加气混凝土物相中可见较多托贝莫来石,水化产物均匀分布相互胶结,形成更为致密结构。 关键词:na2SiO粉煤灰加气混凝土 中图分类号:TU528.2 文献标识码:A 文章编号:1005-8249(2014)01-0003-03 Zhou Weibing ,Sun Zheng ,Zhu Jiaoqun' ,Zhu Huiying ( 1.School of Materials Science and Engineering ,Wuhan University of Technology ,Wuhan 430070 ,China ; 2 .Guangxi Institute of Building Research Design .Nanning 530011 ,China ) Abstract :The SiO ;as alkali-activator was added to improve the activity fly ash in aerated concrete paste ,and to with the physical property change of aerated concrete before and after activation .Phase position and microstructure morphology of hydration products were also studied by XRD and SEM methods .The results show that the ,can significantly improve the pressive strength of aerated conerete . After alkali activated effect ,more tobermorite can be observed in fly ash aerated concrete hydration products ...
2010年12月 施工技术 第39卷第12期 CONSTRUCTION TECHNOLOGY 碗扣式钢管模板支撑架足尺模型承载力试验研究 辛克贵,黄勋,沈邕2,金同乐 (1.清华大学土木工程安全与耐久教育部重点实验室,北京100084 2.北京盛明建达工程技术有限公司,北京102200 [摘要】碗扣式钢管模板支撑架因其性能优越,在我国大跨建筑和桥梁工程中的使用越来越广泛。脚手架倒塌事 故也在不断发生。对模板支撑架承载力理论研究尚未透彻是引起事故的重要因素之一。为研究柱距和外立面斜 撑因素对碗扣式模板支撑架承载力的影响,按照工程实际搭设规格设计3组试验架,得到3组支撑架体的承载力、 破坏形态、荷载位移曲线、应力分布情况,同时还监测到可用于施工监控的关键数据。 关键词碗扣式模板支撑架;试验研究;承载力施工监控 【中分类号】TU731.2 [文献标识码]A 文章编号】1002-8498(2010)12-0067-04 Experimental Study on the Bearing Capacity of Full-scale Cuplok Steel Tubular Supporting Frame Xin Kegui' ,Huang Xun' ,Shen Yong ,Jin Tongle ( 1.Tsinghua University ,Key Laboratary of Engineering Safety and Durability of Ministry of Education of the People's Republie of China ,Beijing 100084 ,China ; 2 .Beijing Shengming Jianda Engineering and Technology Co ..Beijing 102200 ,China ) Abstract :Because of its own superiority ,the cuplok steel tubular supporting frame has been more and more used in long-span building construction and bridge construction .Unfortunately ,the supporting frame accidents occur frequently .The major cause of such accidents is the imperfection of the bearing capacity theory the supporting frame .In order to study the effects of bay length and out...
施工技术 2013年6月上 14 CONSTRUCTION TECHNOLOGY 第42卷第11期 D0I:10.7672/sgjs2013110014 碗扣式模板支架斜撑等效弹簧刚度的求解方法 胡鹏飞,卓新1,王建林2,张成2 (1.浙江大学建筑工程学院,浙江杭州310027;2.建桥建设集团有限公司,浙江乐清325600) [摘要]针对碗扣式模板支架的斜撑刚度取值问题,提出了等效弹簧刚度求解方法.算例结果表明,采用简化的无 斜撑计算模型合理,在此基础上建立有斜撑计算模型并结合试验值与有限元计算值可求出斜撑的等效弹簧刚度; 通过水平杆与立杆连接节点分别为饺接、刚接、半刚接的计算模型的极限承载力计算值与试验值对比,表明半刚接 计算模型能更好地模拟试验的真实工况. [关键词]脚手架;碗扣式模板支架;斜撑;弹簧刚度;半刚性连接 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2013)11-0014-06 Calculation of the Equivalent Spring Rigidity for the Diagonal Bracing of Cuplok Support Scaffold Hu Pengfei' Zhuo Xin' Wang Jianlin2 Zhang Cheng2 (1.College of Civil Engineering and Architecture Zhejiang University Hangzhou Zhejiang 310027 China; 2.Jiangiao Construction Group Co.Ltd.Yueging Zhejiang 325600 China) Abstract:To solve the diagonal bracing rigidity of cuplok support scaffold a method of equivalent spring rigidity was proposed.The results from an illustrative example show that the simplified calculation model with no diagonal bracing is reasonable.Based on that a calculation model with diagonal bracing was established and the equivalent spring rigidity of diagonal bracing can be obtained bining the experimental values and the values from finite element...
粉煤灰综合利用 FLYASHCOMPREHENSIVEUTILIZATION2018 NO.4
试验与应用
硫酸环境下超细粉煤灰混凝土力学性能研究 Study on MechanicalProperties of UltrafineFlyAsh Concrete under SulfuricAcid Environment
吴俊飞 (黄淮学院,河南驻马店463000) 摘要:为了获得硫酸环境下超细粉煤灰混凝土的力学性能变化,通过开展室内试验,采用浸泡方式研究超细粉 煤灰的掺量、粒径变化对超细粉煤灰混凝土在不同硫酸根离子浓度的硫酸溶液中力学性能衰减规律。