粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2013NO.5 专题研究 水胶比矿渣粉对混凝土力学性能影响的试验及机理研究* Water/cement Ratio and Slag Powder Experiment and Echanism Study of Concrete Mechanics Performance Influence 李双喜,王志明2,唐新军 (1.新疆农业大学水利与土木工程学院,乌鲁木齐市830052;2.新疆克孜尔水库管理局,新疆库车县,842313) 摘要:以不同配比的水胶比和矿渣粉掺量为影响因素,配制混凝土试件进行抗压强度正交试验,深人系统的研究 其对高性能混凝土力学性能的影响.在此基础上,通过电镜观测,从微观机理角度对宏观性能进行分析解释.研究表 明,混凝土的抗压强度均随着水化龄期的延长而增大.水化早期,接有矿渣粉的高性能混凝土强度都较低;水化后期,矿 渣粉活性效应发挥显著.在水胶比不变时,随着矿渣粉掺量的增加混凝土的强度是在逐渐降低的.使用42.5R普通水 泥,控制水胶比在0.40-0.20,掺加矿渣粉,可配制出C45~C65的高性能混凝土.微观机理研究显示矿渣粉的存在使混 凝土中孔隙减少,孔径变小,结构变密实,起到了很好的填充和微集料作用. 关键词:混凝土;矿渣粉;水胶比;力学性能;微观机理 中图分类号:TU528.1文献标识码:A文章编号:1005-8249(2013)05-0019-04 Li shuang-xi Wang zhi-ming Tang xin-jun College of water conservancy and civil engineering of Xinjiang Agricultural University 830052; Administration of kizil reservoir in xinjiang 842313) Abstract:Slag powder instead of cement mixing into concrete has two aspects of technology and economic benefits.According to this char- acteristic based on the different ratios of water/cement ratio and dosage of slag powder as influencing factors concrete specimens for pressive strength of orthogonal test is prepared and thorough system to study the effect on the mechanical properties of high performance concrete.On this ba- sis by electron microscopy sem)observations macro performance is analyzed from the Angl of microscopic mechanism explanation.Studies have shown that the pressive strength of concrete increases with hydration time.In the early hydra...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2015no.2 试验与应用 水玻璃激发粉煤灰、矿粉活性的试验研究 Experimental Study on Fly Ash and Slag Activated with Sodium Silicate 吴辉琴,张春,李青,吴超,户相洛 (广西科技大学土木建筑工程学院,广西,柳州,545006 摘要:以水泥为主要胶凝材料,掺加工业废渣粉煤灰、矿粉作为替代物,同时添加一定量的水玻璃激发剂,研究其 对矿物掺合料的激发机理及合理掺量。结果表明:水玻璃对矿物掺合料的活性激发效果表现良好,改善了水泥基材料的 强度,实现了保护环境和节约经济的目的。 关键词矿物掺合料;水玻璃;活性激发 中图分类号:TQ528.02 文献标识码:A 文章编号:1005-8249(2015)02-0023-03 WU Hui-qin ,ZHANG Chun ,LI Qing ,HU Xiang-luo WU Chao ( Collegeof Civil Engineering ,Guangxi University science and technology ,Liuzhou 545006 ,China ) Abstract :The stimulation mechanism of mineral admiatures and proper dosage of sodium silicate activators is studied .The results show that the sodium silicate on good activating effect of mineral admixtures and improve the strength of cement-based material .This method achieves the purpose of protecting environment and saving the economy . Key Words :Mineral admixture ;Sodium silicate ;Activation 粉煤灰和矿粉是比较典型的可以被激发剂激发而 文章在研制出一种矿粉-粉煤灰水泥基材料的基 发生水化、产生强度的胶凝材料。利用粉煤灰、矿粉取 础上41,针对该种水泥基材料,采取对粉煤灰物理细 代混凝土中的部分水泥和细集料,较好地改善混凝土 磨和添加水玻璃化学激发剂结合的方法,进一步通过 的某些性能并节约水泥,一直是人们研究、关注的课 实验研究粉煤灰、矿粉替代水泥胶凝材料制作轻型节 题,而发挥粉煤灰、矿粉的活性或活性成分,却是充分 能混凝土砌块时,水玻璃掺量对粉煤灰、矿粉及水泥组 利用粉煤灰和矿粉作用的关键...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2016NO.5 试验与应用 水泥土无侧限抗压强度的尺寸效应* The Size Effect of Unconfined Comprehensive Strength of Cement-soil 王珍兰,陈艳丽,储冬冬,黄根民,刘华强 (江苏省水利科学研究院材料结构研究所,江苏扬州225002) 摘要:针对当前水泥土搅拌桩防渗墙强度的现场检测与室内强度试验,存在试样的尺寸不统一,不同尺寸之间的 强度无法进行换算的问题。通过试验,分析了不同尺寸和形状的水泥土无侧限抗压强度之间的尺寸效应,并通过线性回 归的方法,得出了不同尺寸和形状的水泥土的无侧限抗压强度换算关系,对解决水泥土搅拌桩防渗墙墙身强度检测中不 同尺寸和形状的试件所导致的强度差异问题,具有很好的指导性和实用性。 关键词:水泥土;无侧限抗压强度;尺寸效应 中图分类号:TU411.6 文献标识码:A 文章编号:1005-8249(2016)05-0045-04 Wang Zhenlan,Chen Yanli,Chu Dongdong,Huang Genmin,Liu Huaqiang Materials and structural engineering department,Jiangsu hydraulic research institute,Yangzhou Jiangsu 225002) Abstract:There are the problems that the sample size is not uniform and strength between different sizes can not be conversed in the current site inspection and laboratory test of the mixing cement-soil wall.Based on the laboratory test of the mixing cement-soil,variation of the unconfined prehensive strength UCS)was analysised with different sizes and shapes.Through regressive analysis on the laboratory testing of cement-soil, the conversion relation among UCS of cement-soil with different sizes and shapes were obtained.This study is helpful and practical for ...
粉煤灰综合利用 2018N.2 FLY ASH COMPREHENSIVE UTILIZATION 建筑科技 正交试验法在再生轻骨料混凝土配合比设计中的应用 Application of Orthogonal Test Method in Mix Proportion Design of Recycled Lightweight Aggregate Concrete 苏利全1,王锋1,段文杰2 (1.河北建研工程技术有限公司,石家庄050227 2.山东理工大学建筑工程学院,淄博25500) 要:利用碎砖为主的建筑垃圾与陶粒制备再生轻骨料混凝土,采用正交试验的方法对再生轻骨料混凝土的配 合比进行研究,研究了水胶比,粉煤灰掺量、砂率,再生骨料掺量对混凝土抗压强度,强质比,坍落扩展度的影响规 律及显著性。通过对试验结果分析,结果表明水胶比对混凝土的28d强度影响最大,其次粉煤灰掺量,再生骨料取代 率,砂率的影响较小。对于扩展度的影响因素从大到小排序依次是:粉煤灰的掺量、水胶比、砂率、再生骨料的取代率。 当粉煤灰的掺量30%左右,再生轻骨料混凝土的扩展度最高,和易性较好,混凝土的28d强度最高。碎砖颗粒的掺量 40%的时候,使得混凝土的强度达到最高。 关键词:再生轻骨料混凝土;工作性;强度;正交设计 中图分类号:TU528.2 文献标识码:A 文章编号:1005-8249(2018)02-0078-04 Su Liquan' ,Wang Feng ,Duan Wenjie ( 1.Hebei Institute Engineering Technology Co .,.,ShiJiaZhuang ,050227 ; 2 .School of Civil Engineering ,Shandong University of Technology ,ZiBo ,25500. ) Abstract :Recycled lightweight aggregate concrete was made with construction waste and ceramsite brick mainly including brick .Using the orthogonal test method ,the mix proportion of recycled lightweight aggregate concrete was studied .The influence regularity and significance of water binder ratio ,fly ash ,sand ratio ,the amount of recycled aggregate proportion on the pressive strength of...
粉煤灰综合利用 FLY ASH COMPREHIENSIVE UTILIZATION 2017no.1 试验与应用 正试验法在低掺量碱渣全固废混凝土中的应用 Application of Orthogonal Test Method in Low Alkaline Solid Waste Concrete 李亚齐,倪文,徐东,高巍 (北京科技大学土木与资源工程学院,北京100083) 摘要:采用正交试验方法对低碱渣全固废碱渣混凝土的配合比进行研究,考察了碱渣、脱硫石膏和钢渣三个因 素的掺量对混凝土抗压强度和坍落度的影响情况结果表明影响混凝土整体性能因素的大小为;钢渣>脱硫石膏>碱渣。 通过对试验结果的均值、极差分析,从而得出碱渣因素对混凝土性能影响最大,确定各因素的比例关系为碱渣:脱硫 石膏:钢渣=1:2:5。对净浆试块进行微观分析,发现胶凝体系中生成的钙矾石和C-S-H凝胶是贡献混凝土强度的主 要因素。 关键词:碱渣;全固废混凝土;正交试验;抗压强度;坍落度;钙矾石;c-s-H凝胶 中图分类号:TU528 文献标识码:A文章编号:1005-8249(2017)01-0029-05 Li Yaqi ,Ni Wen ,Xu Dong ,Gao Wei Civil and Resource Engineering and Resource ,University of Science and Technology Beijing ,Beijing 100083 ,China ) Abstract :In this paper ,orthogonal test method was used to study the mix proportion of alkali slag solid waste concrete ,and the effects of alkali slag ,desulphurization gypsum and steel slag on the pressive strength and slump of concrete were investigated .The results show that the factors affecting the overall performance of concrete size is ;steel slag >desulfurization gypsum >alkali sludge .Through the mean and range analysis of the test results ,it is concluded that the alkali sludge has the greatest influence on the concrete perfo...
施工技术 2014年1月下 32 CONSTRUCTION TECHNOLOGY 第43卷第2期 D0I:10.7672/sgj82014020032 椭圆形钢结构弧形钢梁分段吊装拼装技术 孙群伦1,林滨滨1,傅林波2 (1.浙江建设职业技术学院,浙江杭州311231;2.浙江中南建设集团钢结构有限公司,浙江杭州310052) [摘要]某会展中心建筑平面造型近似椭圆形,屋顶结构为近似椭圆体钢结构.通过介绍椭圆形钢结构弧形钢梁 分段吊装拼装施工特点和难点,详细闸述了弧形钢梁分段吊装拼装施工流程、施工要点、质量控制措施与仿真分析 结果.实践证明分段吊装拼装技术方法可靠,能够最大限度地减少对施工场地的要求,提高施工质量,减少机械吊 装台班量与难度,节约施工成本. [关键词]钢结构;弧形钢梁;吊装;拼装;质量控制 [中图分类号]TU758.1 [文献标识码]A[文章编号]1002-8498(2014)02-0032-03 Segmental Hoisting and Assembly Technology of Oval Steel Structure Arc Steel Beams Sun Qunlun' Lin Binbin' Fu Linbo2 (1.Zhejiang College of Construction Hangzhou Zhejiang 311231 China; 2.Zhejiang Zhongnan Group Steel Structure Co.Ltd.Hangzhou Zhejiang 310052 China) Abstract:A conference and exhibition center is oval plan whose roof is oval steel structure.By analyzing the characteristics and difficulties of segmental hoisting and assembly construction of the oval steel structure arc beam the arc beam segmental hoisting and assembly construction construction points quality control measures and the results of the simulation analysis are described in detail.Practice has proved that the segmental hoisting and assembly technology is reliable can minimize the construction site requirements improve the construction quality reduce the rent amount and difficulty of hoisting machinery and save the construction cost. Key words:steel structures;arc steel beam;hoists;assembly;quality control 1工程概况 柱,其中劲性钢骨规格为口500×500×16,框架柱柱 某会展中心建筑平面造型近似椭圆形,屋顶结底标高为-1.650m 框架柱柱顶的最大标高约为 构为近似椭圆体钢结构(见图...
2017年9月下 工技术 第46卷第18期 CONSTRUCTION TECHNOLOGY do:10.7672/sgjs2017180011 椭圆形不连续支承弦支穹顶预应力施工技术* 于敬海12,冷明13,张俊铎,鲍敏 (1.天津大学建筑工程学院,天津3000722.天津大学建筑设计研究院,天津300073 3.中国电建集团中南勘测设计研究院有限公司,湖南长沙410000:4.天津三建建筑 工程有限公司,天津300171:5.北京市建筑工程研究院有限责任公司,北京100039 摘要]针对不连续支承椭圆形弦支穹顶结构,通过施工全过程分析,确定了适用于该类结构的分步分级张拉径向 杆的预应力施加方法。根据结构特点,设立了合理的施工张拉控制方法,实现了预应力体系的建立和结构的成型。 对施工过程中的网壳起拱值进行监测,结果表明现场监测值与理论计算值吻合较好。此外,对放样误差进行统计 分析发现,该误差对结构受力状态和最终起拱值影响较小。这说明了以索力控制为主,挠度控制为辅的控制标准 能够满足设计要求。 关键词]钢结构;索结构预应力弦支穹顶;施工过程;分级张拉;施工技术 中图分类号】TU391 文献标识码]A 文章编号1002-8498(2017)180011-04 Prestressed Construction Technology of Suspendome Structure with Discontinuous Support YU ,LENG ,ZHANG Junduo ,BAO ( 1.School of Civil Engineering ,Tianjin Unitersity ,Tianjin 300072 ,China 2 .Architectural Design and Research Institute of Tianjin Unirersity ,Tianjin 300073 ,China ;3 .Hydro China Zhongnan Engineering Co ..Changsha ,Hu' nan 410000 ,China 4 .Tianjin No .3 Construction Engineering Co .., Tianjin 300171 ,China ;5 .Beijing Building Construction Research Institute Co ..Beijing 100039 ,China ) Abstract :A step by step tension method is designed for suspended-dome structure with discontinuous support .A construction control method which is ...
[关键词]高层建筑;悬挑桁架;铸钢节点;有限元分析;试验 [中图分类号】TU323.4 [文献标识码】A [文章编号]1002-8498(2013)14-0005-03 SafetyPerformanceResearchontheCastSteelJointin GiantCantilever Truss of TongluLegendaleHotel Zhou Xiaofei,Zhou Guan'gen,Sha Xueyong (Zhejiang Southeast Space Frame Co.,Ld.,Hangzhou,Zhejang311209,China) Abstract;Giant cantilever steel truss is often used in the building with long plex facade.Because of the structure plexity,cast steel is often used in the connection joints of stecl members.Because there is no any calculation formula for the cast steel joints at home and abroad, the experiment and FEA are the most effective method in testing this kind of joints.The safety performance of cast steel joints sample in long cantilever steel truss of Legendale Hotel is tested by full scale experiment and FEA method, and other joints are tested by FEA method.The verification method not only can guarantee the security of cast steel joint, but also is economic.Safety performance research on the cast steel joint in giant cantilever stel truss of Legendale hotel is described in detail in this paper. Key words:tall buildings; cantilever truss; cast steel joint; finite element analysis; testing 1工程概况 2节点构造 励骏酒店位于浙江省桐庐县城富春江畔,该工 因铸钢节点在结构中所处的位置不同,其构造 程由主楼、东西裙房及地下室组成,总建筑面积 也有所不同,出于经济及工期的考虑,工程仅对其 81000m²。