查询词典 concrete layer

It was shown in study that by moderately added air entraining agent in concrete would obviously enhance the concrete durability.

通过研究发现，在混凝土中适当引气可以大幅度提高混凝土的耐久性能。

It put forward the technical method for the first time by adding mineral ultra-fine powder and superplasticizer of air entraining agent to realize the high performance pavement concrete system, and made a comprehensive study on various road performances of high performance pavement concrete.

本论文依托吉林省重点工程科研课题，首次系统性地提出了掺入矿质超细粉和高效引气减水剂实现路面混凝土高性能化系统的技术方法，对配制的高性能路面混凝土各项路用性能进行了全面地研究。

The system can be used with practically any concrete forming method on the market. When using this insulating process with various concrete forms the forming contractor erects both the exterior and interior sections of his forms.

该系统可以用在几乎任何具体成形方法对市场的时候，使用这种保温过程中的各种具体形式，形成承包商的屏障，无论内部和外部章节他的表格。

And New York's rebellion called to me excitedly, this savagery which piled great concrete block on concrete block, topping at the last moment as in an afterthought, with crowns as delicate as pinnacled ice; this lavishness which, without a prayer, pillaged coal mines and waterfalls for light, festooning the great nature-severed city with diamonds of frozen electrical phenomena― it fascinated me, the Asian man, and in it I saw not Milton's Satan, but the one of Blake.

而纽约的反叛精神激动著我的心。它的野性将大块混凝土层层垒起，在最后一刻仿佛踌躇再三才加盖，顶部皆似精巧的冰山；它的挥霍未经祈祷便爲获取光明劫掠煤矿和瀑布，用钻石般璀璨夺目的无数电灯装饰这座超脱自然的伟大城市──这一切令我，一个亚洲人心醉神迷。在纽约身上我看到的不是弥尔顿笔下的撒旦，而是布莱克的撒旦。

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。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。