查询词典 cement

CO2 and H2S exist in the hydrocarbon zone and foramtion water,as the accompany gases of petroleum and nature gaso or components of formation water,which will cause corrostion to the cement sheath under certain conditions of humidity and pressure.It will decrease the cement sheath's alkalinity,which results in the decrease of cement sheath's strength,permeability increase,and places a premium on fluid channeling and borehole wall sloughs accident in plastic formation,shortening the oil- gas well's production lifetime and giving rise to tremendous ecomonic losses.

CO2和H2S作为石油和天然气的伴生气或地层水的组分存在于油气层或地层水中，在一定的湿度及压力条件下会对固井水泥环产生腐蚀作用，从而降低水泥环的碱性，使水泥环强度下降，渗透率增大，并诱发流体窜流、塑性地层井壁跨塌等事故，从而缩短油气井的生产寿命，造成巨大的经济损失。

900M3 thick granite tile finish (yellow rust litchi-China origin) bush hammered finish c/w 20mm screeding with average 50mm thick cement and sand mortar base; butt and jointed with cement and sand (1:3) mortar pointed in matching colored cement grout and laid on screeded bed

900立方米厚的花岗岩砖饰面（荔枝铁锈黄，中国原产地）剁斧石面，使用20毫米沙浆，平均50毫米厚的水泥砂浆基地；用水泥和沙子（ 1：3 ）砂浆对接和连接，匹配彩色水泥灌浆并浇注在刮平的基床上。

Each time after putting to (the instrument with the set of Yamshidi-Nadel provided by Kypho of America for injection of bone cement into the vertebrae; each putting could contain about 1.5 mL bone cement) inject bone cement into the vertebrae, the pressure P was not very high, with 500 kPa bar below for majority and the effect caused showed a significant statistical difference (P.01). Whereas, the pressure within the area of the vertebral P value was not high either, the majority was 10.00 Unit lower, which also led to the effects of significant difference (P.01). Both two states showed partial distribution. After making the statistical analysis to the casual two puttings between the first, second, third and fourth putting of each vertebrae, there existed the general differences. The differences were also found between other puttings (a.0083) on the statistics basis apart from between the first and second and between the third and fourth.

结果 每个椎体的椎体成形术均达到临床评价要求，每次推杆（美国Kypho公司提供标准椎体成形术中Yamshi-Nadel套系中推注骨水泥入椎体的器具，每具推杆可容纳骨水泥约1.5mL）推注骨水泥入椎体时所产生的椎体内的压力P不是很高，多数在0.50 bar以下，其所导致的效应具有显著的统计学差异(P.01)，而每次推杆推注骨水泥入椎体时的椎体内压力面积值P也不是很高，多数在10.00 Unit以下，其所导致的效应具有显著的统计学差异(P.01)，两者均呈偏态分布；而且，对每例椎体的第一、二、三、四杆之间两两予以统计学上的分析，在总体存在差异有统计学意义的基础上还发现除第一和二杆、第三和四杆之间外，其他各杆之间存在着差异(a.0083)。

AbstractObjectives1 Correlate bone mineral densityto vertebral compressive strengths.2 Consummate the technique for percutaneous polymethylmethacrylate vertebroplasty and observe the pattern of PMMA imaging distribution.3 Determine the strength and stiffness of osteoporotic with or without vertebroplasty with PMMA bone cement.4 Correlation of BMD,insertion torque and pull-out strengths of pedicle screws.5 Ascertain whether augmentation with PMMA bone cement can enhance pedicle screw fixation in the osteoporotic spine.6 Ascertain whether augmentation pedicle screw fixation with PMMA bone cement can enhance the stability of unstable thoracolurner burst fractures of osteoporotic spine.

目 的1、测试椎体压缩强度，分析强度与骨矿物质密度（bone mineral density，BMD）的相关关系。2、观察经皮椎体成形术后聚甲基丙烯酸甲脂（polymethylme- thacrylate，PMMA）骨水泥在椎体内的形态学分布及影像学表现。3、比较PMMA骨水泥骨质疏松椎体成形术前/后椎体最大抗压力和压缩刚度的变化。4、分析椎体BMD、螺钉最大旅入力矩和最大拔出力三者之间的关系。5、分析PMMA骨水泥强化骨质疏松椎弓根螺钉后的螺钉的最大轴向拔出力和拔出刚度的变化。6、评价PMMA骨水泥强化骨质疏松椎弓根螺钉脊柱内固定对不稳定型胸腰椎损伤的即刻稳定性和反复载荷后的稳定性。

In order to prevent this kind of pollution, often spreads the organosilicon water-repellent, the polymer cement mortar, the emulsion resin, the epoxy resin etc on the inside surface of the quartz stone , although it can have certain protection effect, but also has the following insufficiency: Uses organosilicon water-repellent processing, the quartz stone material, cement and the mortar cannot form a sealed surface layer, is unable to suppress the hoar frost separation and the rain spot effectively; Uses polymer cement processing, not only material itself includes the hoar frost ingredient, moreover the water permeability is big, the protection effect is also not ideal

为防止这类污染，常在石材内面涂上有机硅防水剂、聚合物水泥砂浆、乳液树脂、环氧树脂等，虽能收到一定的防护效果，但也存在以下不足：采用有机硅防水剂处理，石材与砼、砂浆被贴面不能形成密封层，无法有效抑制白霜析出物和润斑；采用聚合物水泥处理，不仅材料自身含有白霜成分，而且水渗透率大，防护效果也不理想

The cement coagulation earthen road pavement stave compaction technology is a repair major damage cement road surface new technology, can solve the old cement road surface to spread the reflection crack question which the brea bed produces, has the building cost of projects to be low, the construction is convenient, affects the small merit to the transportation, provides the good driving performance for the newly built road surface.

水泥混凝土路面破碎压实技术是修复严重损坏水泥路面的一项新技术，能够解决旧水泥路面加铺沥青层所产生的反射裂缝问题，具有工程造价较低，施工方便，对交通影响小的优点，为新建路面提供良好的行车性能。

In this paper, the main question to be solved is the method of permeability testing of soil cement, and finding the quantitative relation between permeability coefficient and cement content, and the relation between permeability of enforcement soil cement and fiber.

通过对多组水泥土和加筋水泥土试块进行的抗渗试验以及对试验结果的分析，得出下面的结论： 1。

The slump and the time of slump are tested through the method of slump test, and the properties of concrete are calculated and analyzed. The study denotes that for C20 grade concrete, the value of the shear yield stress σ0 and plastic viscosity η is the smallest when the fly ash contains 20% weight of Portland cement; for C60 strength grade concrete, the value of plastic viscosity is the smallest when fly ash contains 20% weight of Portland cement and the value of the shear yield stress σ0 is the smallest when fly ash contains 30% weight of Portland cement.

利用改良坍落度筒的实验方法对坍落度和坍落时间进行测试，并进行相应的计算与分析，实验结果表明：强度等级为C20的混凝土，粉煤灰掺量为20%时粘度和屈服应力值最低；强度等级为C60混凝土，粉煤灰掺量为20%时，其粘度最低，而屈服应力值在粉煤灰掺量为30%时最低。

At present, cement grinding system with roller press, especially combination grinding system have become one of cement grinding preferred schemes in large-scale cement production line.

目前，带辊压机的水泥粉磨系统，特别是挤压联合粉磨系统已成为了大型水泥生产线水泥粉磨的优选方案之一。

Effects of cement quantity, hydration temperature, cement fineness, water cement ratio, gypsum addition, and hydration time on the particle weight of CPA were studied.

通过研究水泥称量、水化温度、水泥细度、水灰比、石膏掺量和水化时间对结粒量的影响，探讨了该检测方法的可行性。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了