水泥

Thin elastic foundation of cement concrete pavement design theory, in-depth analysis is to arrive at the grass-roots non-uniform bearing broken concrete pavement panels, gnawing edge, the wrong units, as well as the main reason for structural damage produced by taking certain measures to improve the concrete between the road surface and the grass-roots support conditions, and improve durability of the cement concrete pavement and stability.

面层与基层之间存在脱空现象和不均匀支承的状况，致使水泥混凝土路面的承载力下降。通过水泥混凝土路面弹性地基薄板的设计理论，深入分析得出基层的不均匀支承是水泥混凝土路面断板、啃边、错台、以及产生结构性破坏的主要原因，通过采取一定措施改善砼路面面层与基层之间支撑条件，提高了水泥混凝土路面的耐久性和稳定性。

Thin elastic foundation of cement concrete pavement design theory, in-depth analysis is to arrive at the grass-roots non-uniform bearing broken concrete pavement panels, gnawing edge, the wrong units, as well as the main reason for structural damage produced by taking certain measures to improve the concrete between the road surface and the grass-roots support conditions, and improve durability of the cement concrete pavement and stability.

面层与基层之间存在脱空现象和不均匀支承的状况，致使水泥混凝土路面的承载力下降。期刊文章分类查询，尽在期刊图书馆通过水泥混凝土路面弹性地基薄板的设计理论，深入分析得出基层的不均匀支承是水泥混凝土路面断板、啃边、错台、以及产生结构性破坏的主要原因，通过采取一定措施改善砼路面面层与基层之间支撑条件，提高了水泥混凝土路面的耐久性和稳定性。

The results show that superplasticizer has effect on clinker grinding in varying degrees,which depend on the amount of superplasticizer and the property of clinker、The compatibility of the same clinker with different superplasticizers and that of the same superplasticizer with different clinkers are diferent.

结果表明，高效减水剂对水泥熟料具有不同程度的助磨作用，作用的大小与减水剂掺量及熟料自身物料特性有关；高效减水剂与水泥熟料之间存在相容性问题，同一种水泥熟料与不同减水剂、同一种减水剂与不同水泥熟料之间的适应性不同。

This paper targets at the design of a new dry process kiln cement grinding plant, whose production capacity is 2500 tons of cement clinkers per day. According to some relative references and the product quantity required per day, we design and calculate the cement burden plan, the three great balances (which include material balance, main engine balance and storehouse balance) and the choice of the type of equipments used in the cement grinding plant.

本论文就2500 t/d（日产2500吨）熟料新型干法窑水泥粉磨车间进行设计，根据相关文献以及对产量要求对水泥的配料方案、三大平衡（物料平衡、主机平衡、储库平衡）和水泥粉磨车间系统设备的选型进行设计与计算，并据此对水泥粉磨车间的主要粉磨设备以及其相关的附属设备的型号进行了选择。

The composite Portland cement for the road concrete project by adding fine fly ash and ground steel slag into the cement was studied by means of lots of test,and the properties such as flexural strength,abrasive resistance,shrinkage and crack resistance of the composite cement were improved.

通过大量试验在水泥熟料中复合掺入超细粉煤灰及磨细钢渣粉，配制了用于公路路面水泥混凝土工程的复合硅酸盐水泥，重点改善道路水泥的抗折强度、耐磨性能以及收缩抗裂性能。

High-Al cement or calcium aluminate cement, soft clay, kyanite, Al2O3 and/or SiO2 powder, and naphthalenesulfonic acid-formaldehyde condensate.

铝硅质原料是焦宝石、莫来石或高铝矾土中的一种或几种以上，其中Al 2 O 3 ≥45％；结合剂为高铝水泥或纯铝酸钙水泥；高铝水泥占喷补料总量不少于5％，其中Al 2 O 3 ≥46％，CaO≤40％；纯铝酸钙水泥中Al 2 O 3 ≥69％，CaO≤25％；烧结剂和可塑剂为软质粘土，膨胀剂为蓝晶石；外加剂为萘磺酸甲醛缩合物。

The net cement with bentonite can form hydrogen key which can improve the felt of the systematic and are wail for eventual strength; The main mechanism of J-85 accelerator to accelerate concrete coagulating are in alkalescence condition to make aluminate and gypsum link and block the building of calcium and aluminium sulphate around cement granule; Polypropylene acid can improve early strength of cement through altering the thickness of hydroxide in cement grout.

添加膨润土后的水泥净浆中形成了氢键，提高了体系的粘结性，对后期强度发展有利； J-85速凝剂加速混凝土凝结的主要机理就是在碱性条件下，使铝酸盐和石膏结合，阻碍水泥颗粒周围的硫铝酸钙即钙钒石的生成，从而使水泥迅速凝结；聚丙烯酸通过改变水泥浆体中羟基的浓度从而提高水泥试块初期强度。

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。

The compression or tension strength of soil cement is dependent on curing time and the mixed cement content.

在强度试验方面，土壤水泥的单压或张力强度会随著养护龄期增加而增加，同时强度也会随著水泥添加量增加而增加，28天土壤水泥的单压强度约为7天单压强度的1.68倍，28天张力强度约为7天张力强度的1.30倍，土壤水泥单压或张力强度随著最大乾密度的增加而增加，并且呈现线性关系。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。