查询词典 concrete

In this paper,a detailed analysis of the causes of the breakages is carried out. The discussion is mainly focused on the stability and strength of subgrade, the selection and construction of base course materials, the quality control of pavement concrete,the control of the mixture ratio of the concrete materials and the technological control in the process of construction.

文章着重从路基的稳定和强度、基层结构材料的选择和施工控制、路面混凝土的材料质量控制、施工中的混凝土配合比控制和施工工艺控制等角度对路面破损产生的原因加以分析。

The durability test increases concrete of resistance value the nano-silica powder to be possible to promote 30% to 42%, the coefficient of penetration then mostly is lower than 100 coulombs, demonstrated nano-silica powder can effectively promote the concrete durability.

由耐久性试验显示，奈米矽粉高性能混凝土之电阻值约提升30%至42%，渗透系数则低於100库仑，即添加奈米矽粉能有效提升高性能混凝土之耐久性。

The entire Superstructure cross-section, except for traffic barrier, shall be considered to be placed at one time for purposes of determining support requirements and designing falsework girders for their stresses and deflections, except as follows: For concrete box girder bridges, the girder stems, diaphrams, crossbeams, and connected bottom slabs, if the stem wall is placed more than 5 days prior to the top slab, may be considered to be self supporting between falsework bents at the time the top slab is placed, provided that the distance between falsework bents does not exceed 4 times the depth of the portion of the girder placed in the preceding concrete placements.

整个上部结构截面除交通障碍，应被视为在一个确定的要求和支持他们的设计应力和挠度除，脚手架时间放在梁的目的如下：对于混凝土箱形梁桥，主梁茎，diaphrams，横梁，和连接底板，如果干墙放置超过5天前向顶板，可能被认为是自我支持之间的脚手架本茨当时顶端板放置，只要脚手架茨之间的距离不超过4倍，在前面的混凝土主梁部分存款放在深度。

Further more, the prestress loss , which is caused by the shortened beam member due to concrete shrink and creep, is of disbenefit to prestress concrete structure.

不仅如此，混凝土的收缩和徐变使构件缩短而引起预应力损失，对预应力混凝土结构十分不利。

In order to predict the surplus fatigue life of concrete under nondestructive condition,the effect of some parameters such as elastics modulus,Poisson s ratio and density of concrete on the fatigue life is discussed in this paper.

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The main contents are as follows:(1) Configuration design and Experiment research The projectile configuration of penetration weapon is designed according to the technical and tactics target, including the structure design of the projectile , the structure design of the empennage and the structure design of the concrete target. The simulation experiments studying the relation between velocity and concrete intensity and penetration depth have been carried out.

主要内容如下：(1)结构设计和试验研究根据技术指标完成了子母弹侵彻战斗部模拟弹体的尺寸和结构设计，尾翼的尺寸和设计结构、靶体尺寸和结构设计，完成了模拟弹丸混凝土的模拟试验，研究靶体强度和初速度对侵彻深度的影响；通过对结构设计的研究和弹丸侵彻混凝土的试验研究，完善钻地弹设计方案。

The study results show that the attenuation of explosion stress wave is more rapid in the concrete plank, compared with that in the infinite concrete medium.

研究结果表明，与无限混凝土介质相比，爆炸应力波峰值在混凝土板中衰减较快。

Carbon fiber, graphite, carbon black, and steel fiber can be used to make smart concrete. But carbon fiber is high in price, low in dispersion and complicate in surface treatment. With the increasing of graphite and carbon black content, the compressive strength of conductive concrete decreases markedly.

机敏混凝土是具有自感知、自适应和损伤自修复等智能特性的多功能材料，利用这些特性可以实现结构的在线健康监测和损伤检测，在大型土木工程结构和基础设施的健康监测以及电子设备的电磁屏蔽等领域具有广阔的应用前景。

The 28 days compressive strength is compared between the graphite electrically conductive concrete and the graphite and steel fiber composite electrically conductive concrete.

比较了石墨导电混凝土和石墨、钢纤维复相导电混凝土28d抗压强度上的差别。

Recently, using solid clay brick is gradually prohibited, so the new wall material is required to fill up the new architecture. Many sections research on this field, using fly ash to develop new building materials is the mostly adopted method, among the new building materials, fly ash foamed concrete is a noticeable one because of its outstanding merits such as light weight, heat preservation, sound insulation and good resisting earthquake. Using fly ash to develop foamed concrete can not only become fly ash into resources, but also provide a new kind of building materials for the innovation of wall materials, which has good economy and society benefits.

近年来，由于墙改&禁实&政策的实施，市场急需新的墙体材料来填补新建筑所需，许多单位相继开展了各有关研究，综合利用粉煤灰研制开发新型建材逐渐成为了主流，其中多孔混凝土特别是粉煤灰发泡混凝土，正以它突出的轻质、保温、隔音、抗震效果好等优点，成为一种引人注目的建筑材料，利用工业固体废弃物粉煤灰研制发泡混凝土不仅能实现粉煤灰的资源化，而且还可为墙体材料的改革提供一种新型建筑材料，具有较好的经济效益和社会效益。

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。