查询词典 concrete

At present there are mostly Hydrostatic Pressure Theory and Penetrative Pressure Theory with regard to concrete frostbiting principle after setting. But they are not the last word, because the pressure can not be measured directly or calculated exactly. The two theories can triumphantly explain much phenomenon about concrete in the freeze-thaw process.

混凝土硬化后的冻害机理目前主要有静水压学说和渗透压学说，由于不能直接测定或进行准确计算，所以还没有定论，但它们可以成功地解释混凝土冻融过程中的很多现象。

This paper introduces some problems related to the crack control of the concrete box girder in the construction of railway passenger line, and connecting with the actual construction example of the box girder of Yongtaiwen Railway Passenger Line, probes into the geneses of the cracks on concrete box girder,and puts forward some corresponding control measures.

介绍了铁路客运专线箱梁的施工过程中，有关箱梁混凝土的裂缝控制问题，结合甬台温铁路客运专线箱梁的施工实例，探讨了箱梁混凝土裂缝的成因，提出了相应的控制措施。

Even when a concrete is adequately mixed care must be taken during placing and compaction to minimize the probability of the occurrence of bleeding, segregation and honeycombing all of which can result in patches of poor quality concrete.

即使混凝土被完全拌匀，在浇注和密实中也应注意使那些能产生局部劣质混凝土的泌水，离析和蜂窝麻面等发生的几率降至最小。

In the period of construction and water impounding,the status of stress and deformation of dam body ,asphalt concrete core wall and concrete imperious wall are all complicated.

对于这类建在深厚覆盖层上的高土石坝，在施工期和蓄水期，坝体和坝基，尤其是坝基混凝土防渗墙的应力变形情况非常复杂。

First of all, the relationship between concrete strength、 acidified depth and the solution density of SO_4~(2-)、H~+, marinating period and concrete initial strength before marinating is established with dimension analysis method.

首先，本文通过量纲分析的方法确定了混凝土的强度和酸化深度与浸泡液的SO_4~(2-)离子浓度、H~+离子浓度、浸泡时间和混凝土初始强度之间的含有待拟和系数的函数关系式。

However, due to not clear knowing to the definition of concrete durability and different understanding to the so called "high performance", people always lose their way in the process of design and construction, for example, overemphasizing the property of high strength and permeability, but ignoring the crack problem that appears more easy, more serious, and more dangerous to concrete structure.

然而，由于对混凝土的耐久性概念认识不清，以及对混凝土所谓&高性能&的理解存在差异，往往在设计和施工过程中陷入很多误区，如过分追求高强度、低渗透性能等，却忽视了随之出现的更易产生、更为严重、同时对混凝土结构整体性潜在危害更大的裂缝问题。

In view of the concrete crack image characteristic, it emphatically discussed the recognition system three core issues. Firstly, it particularizes image preprocessing technology for reducing noise of concrete crack image. On the base of anglicizing the noise of specimen crack image and the characteristic of the noise , it propose the scheme that a hybrid filter will be used to reduce noise and introduce the principle of a hybrid filter.

随后，针对混凝土裂纹图像的特点，着重讨论了识别系统的三个核心问题：首先，详细讨论了对混凝土裂纹图像进行降噪的图像预处理技术，在分析了试件表明裂纹图像噪声的基础上，结合试件裂纹图像噪声的特点，提出组合滤波器的降噪方案，并介绍了组合滤波器的原理。

Its pillar industries are concrete pipe, precasting concrete beams.

据此制定出企业总体发展战略。

According to the testing results of high-performance concrete in sulphate erosion environment at Nanjing underground railway project,a prognosticating model of sulphate-resistance erosion is established,which is based upon the disintegration law of concrete,and the project service life is prognosticated by using this model.

根据南京地铁工程高性能混凝土在硫酸盐侵蚀环境下的试验研究结果，初步建立了基于混凝土衰变规律的抗硫酸盐侵蚀耐久寿命模型，并对该工程进行了寿命预测。

Besides strength and workability, many other properties of concrete, such as heat of hydration, have become more and more important in Concrete Mixture Proportioning.

强度、和易性这两个指标之外的混凝土的其它性质日益得到重视。

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。