混凝土

The iron array electrode covered with concrete as a new electrochemical technique is applied to map the potential imaging and to investigate on the iron electrode corrosion process under concrete: In Cl- solution the corrosion of the iron array electrode covered with concrete had been prevented for a short term since the concrete protection, but the corrosion still occurreed and developed after immersed for a long time.

由于混凝土的隔离和高绝缘性，常规的电化学技术、微探针扫描技术均难于获得在腐蚀介质的浸泡下混凝土/钢筋界面，特别是不同深处的混凝土/钢筋界面的电位分布。本文提出用阵列电极法并结合电子技术和微机控制技术，获得同一水平面上混凝土/钢筋界面以及不同深处的混凝土/钢筋界面的电位分布立体信息图。

The results show that, the chloride concentrations and diffusion coefficients are both a one-humped function of elevations (can also be the time scale of seawater infiltration), they increase with the increase of elevation until they get to the peak value, and then decrease with the increase of elevation; an evident relationship is being between the surface chloride concentrations and the wave forces acted on the concrete surface, while there is no much difference among the diffusion coefficients; the diffusion coefficients get to bigger as the depth from the concrete surface increase in the influence of the capillary structures evolution and chloride concentration, but this tendency of change was alleviated with the increase of depth.

研究结果表明：氯离子侵蚀混凝土设施的竖向分布规律为氯离子浓度、扩散系数与标高之间同为单峰函数分布，先随高程变大而变大，达到峰值后，随高程变大而减小；氯离子侵蚀混凝土设施的环向分布规律为混凝土构件表面氯离子浓度、氯离子通量与波浪力之间有明显的对应关系，波浪力越大，则表面氯离子浓度和氯离子通量越高，而扩散系数在各方位角差别不明显；由于混凝土长期服役过程中内部毛细孔隙结构演化以及氯离子浓度的影响，氯离子扩散系数随混凝土深度变大而变大，但这种变化趋势随深度逐渐趋缓。

Construction of concrete pump is used to enhance the height of 30 1 300M, the thickness of more than 0.5M mass concrete, with savings of manpower, material and time is short, high efficiency, fast and convenient features, concrete pumping concrete on the mobility of higher, the need to control slump at 12-16 cm between the silo slipform request the initial setting of concrete, final setting time control at 2 hours and 20 minutes, 3 hours and 30 minutes or so, stick to prevent mold, in favor of Waterloo or.

混凝土输送泵施工，是用于提升高度30一300M，厚度0.5M以上的大体积混凝土，具有节省人力、物力、时间短、效率高、快捷方便的特点，但泵送混凝土对混凝土的流动性要求较高，坍落度需要控制在12—16厘米之间，筒仓滑模要求混凝土的初凝、终凝时间控制在2小时20分、3小时30分左右，可防止粘模，利于滑升。

In recent years, high performance concrete (HPC, or high strength concrete-HSC) has been widely used in engineering practices such as bridges, runnels, tall buildings, offshore oil platforms and nuclear engineering applications due to its intrinsic properties of high strength, high durability etc. Hence, the prediction of HPC structures performance is of great practical importance, in particular for safety evaluation of HPC structures subjected to fire or other thermal hazard situations.

近年来，随着建筑结构性能要求的提高，高性能混凝土(HPC，或称高强度混凝土HSC)正逐渐蓬勃兴起并替代传统的混凝土用于桥梁、隧道、高层建筑、海洋石油平台和核工业设施等方面，因此对于高性能混凝土结构性能的预测显得十分重要，对火灾或其它高温危险环境下高性能混凝土结构安全性的评估尤其值得重视。

In this paper, Plate Girder Element and Virtual Laminated Element were used to analyze P.

中文题名预应力混凝土斜拉桥施工控制研究副题名外文题名 Construction control study of P.C.cable-stayed bridge 论文作者施笃铮导师徐兴项贻强教授学科专业结构工程研究领域\研究方向学位级别博士学位授予单位浙江大学学位授予日期2002 论文页码总数123页关键词预应力混凝土斜拉桥施工控制斜拉桥桥梁施工馆藏号BSLW /2002 /U448 /36 本文用平面杆系理论和空间虚拟层合单元法，在对预应力混凝土斜拉桥整桥结构进行分析的基础上，用正装迭代法对该斜拉桥进行分阶段施工仿真分析；又通过建立有约束的非线性优化模型，对预应力混凝土斜拉桥的施工控制参数（初始张拉索力和立模标高）及成桥状态进行优化，进而建立预应力混凝土斜拉桥施工控制系统。

One cycle of operation to take Silo body construction, the construction procedure as follows: steel banding to Silo body gantry beams assembled below -→ one-time pouring concrete 700mm high -→ early slide three trips (that is 75mm high)-→ check off the concrete slipform system appropriate degree and working conditions -→ continue pouring concrete 500mm high -→ then slip trip or three -→ pouring concrete to template missing -→ normal sliding each slide or 500mm high -→ stratified cross - lap steel banding -→ pouring concrete 500mm high -→ Waterloo or 500mm high -→ 4 in accordance with the procedure after Silo body pouring until the completion of cycle.

其中筒身施工采取循环作业，其施工程序为：绑扎筒身钢筋至组装好的门架横梁下面—→一次性浇筑混凝土700mm 高—→初滑三个行程（即75mm 高度）—→检查滑出混凝土合适度及滑模系统工作状况—→继续浇筑混凝土500mm 高—→再滑升三个行程—→浇筑混凝土至模板上口—→转入正常滑升，每次滑升500mm 高—→分层交圈绑扎钢筋—→浇筑混凝土500mm 高—→滑升500mm 高—→按后四道程序循环往复直至筒身浇筑完成。

One cycle of operation to take construction, the construction procedure as follows: steel banding to gantry beams assembled below -→ one-time pouring concrete 700mm high -→ early slide three trips (that is 75mm high)-→ check off the concrete slipform system appropriate degree and working conditions -→ continue pouring concrete 500mm high -→ then slip trip or three -→ pouring concrete to template missing -→ normal sliding each slide or 500mm high -→ stratified cross - lap steel banding -→ pouring concrete 500mm high -→ Waterloo or 500mm high -→ 4 in accordance with the procedure after pouring until the completion of cycle.

其中筒身施工采取循环作业，其施工程序为：绑扎筒身钢筋至组装好的门架横梁下面—→一次性浇筑混凝土700mm 高—→初滑三个行程（即75mm 高度）—→检查滑出混凝土合适度及滑模系统工作状况—→继续浇筑混凝土500mm 高—→再滑升三个行程—→浇筑混凝土至模板上口—→转入正常滑升，每次滑升500mm 高—→分层交圈绑扎钢筋—→浇筑混凝土500mm 高—→滑升500mm 高—→按后四道程序循环往复直至筒身浇筑完成。

In order to enlarge applied field of autoclaved aerated concrete block, China engineering building standardization association sent down "A class Autoclaved aerated concrete block and brickwork structure technology rules". The rules point out definitely building autoclaved aerated concrete block tier building can only use A class Autoclaved aerated concrete block.

为了将蒸压加气混凝土砌块推广应用至具有节能、抗震保障的多层承重建筑，扩大应用领域，以求得加气混凝土行业的更大发展，中国工程建设标准化协会砌体结构委员会已下达了，《A类蒸压加气混凝土砌块砌体结构技术规程》，规程将明确指出建造加气混凝土砌块多层房屋只能用A类蒸压加气混凝土砌块。

Study on silica fume at the Scandinavian countries, in spite of the 20th century, the 50's people have a better understanding of the role of silica fume and a preliminary study, but applied to actual projects from the beginning of 70's, first of all, Norway and Sweden and other countries in the port terminals, the North Sea oil fields and underground parts of mines in the silica fume concrete, in 1982, Norway in V Bashang Minoves formally adopted the silica fume concrete dam, the 20th century, the early 80s established in Quebec, Canada silica fume concrete, and large volume of silica fume concrete to carry out pilot studies, mixing high-grade 10,000 cubic meters of concrete, the United States in 1983 a patch of concrete with silica fumekatcha River Dam stilling basin well.

研究硅粉在斯堪的纳维亚国家，尽管在20世纪50年代的人有更深入的了解方面所起的作用和硅粉的初步研究，但应用到实际项目从一开始的70年代，首先，挪威与瑞典和其他国家的港口码头，北海油田和地下部分地雷硅粉混凝土，在1982年，挪威钒坝上米诺维斯正式通过硅粉混凝土坝， 20世纪80年代初成立在加拿大魁北克硅粉混凝土，以及大量的硅粉混凝土进行试验研究，混合高档一点○万立方米具体，美国在1983年一块混凝土二氧化硅fumekatcha江水库消力池以及。

In this paper,one contrast reinforced concrete short column and three reinforced concrete short columns strengthened with concrete and exterior steel plate were tested to investigate their shear behaviors,based on experiment results,it is revealed that complex strengthening with concrete and exterior steel plate can impactful improving shear bearing capacity of reinforced concrete short column.

进行了1根对比钢筋混凝土短柱和3根用混凝土和外包钢板复合加固钢筋混凝土短柱的受剪试验研究，试验结果表明，用混凝土和外包钢板复合加固可有效提高钢筋混凝土短柱的斜截面抗剪承载力。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。