查询词典 concrete

In concrete structure,the quality of surface layer's concrete is different from interior concrete both in physical and mechanical properties and the causes,that yield this difference and lead surface concrete to formthe defects,are analyzed in the paper.

混凝土结构的表层与内部在物理力学性能方面存在着差异。文章分析了产生这种差异的原因，以及由此对表层造成的缺陷。

It mainly contains the following things. At first, I bring for the way of anchoring two cementing slabs next to by using dog irons made of iron bars and then cover the surface of the road using bituminous concrete. After analyzing the feasibility of this method by using the famous and popular use soft ware ASYS, the results show the magnitude of the temperature stresses on the limited mat coat of the road has nothing to do with the length of the concrete slabs after covering it with bituminous concrete. Meanwhile, the relative horizontal shifting, the flexural-tensile strain, and the vertical shearing stress of the slabs next to it becomes the least after anchoring them with dog irons made of iron. Therefore it proves that it really works to use this method to prevent and slow down the speed of the reflection cracks in the bituminous concrete skin coat over the old road.

首先，提出采用钢筋马钉锚固相邻水泥混凝土板后再进行沥青混凝土罩面的新方法；采用国际著名的通用有限元软件ANSYS对其可行性进行了分析，结果表明在有限尺寸的板上进行沥青混凝土罩面后，罩面结构的温度应力的大小与板的长度几乎没有关系，同时采用钢筋马钉锚固相邻旧水泥混凝土板后，可以明显地减小相邻板的相对水平位移、接缝处罩面层底部的弯拉应变和垂直剪应变，从而表明该法对防止或减缓旧水泥混凝土路面上沥青混凝土罩面层的反射裂缝是确实可行的。

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.

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。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 major content of this thesis are as follows:1 Performed FEM analysis before strengthening, and to find out the reason for the cracking and present a strengthening scheme;2 Performed nonlinear FEM analysis before and after strengthening, and to get the varying rule of the relative displacement between the on-site cast concrete side wall and that between the precast concrete arch and the floor, as well as the stress distribution of the gallery;3 Performed on-site observation experiments on the 7~th gallery, and to get the varying rule of the relative displacement between the on-site cast concrete side wall, as well as that between the precast concrete arch and the floor.4 The results of the computation were compared with those of experiments, which verified the effect of the strengthening.

本文的主要工作有： 1 对加固之前的廊道结构进行有限元计算，找出廊道底板开裂的原因，提出加固方案； 2 对加固前后廊道结构进行非线性有限元计算，得到加固前后廊道两现浇边墙相对位移、拱顶与底板相对位移随水库水位变化的规律和廊道结构的应力分布情况； 3 进行廊道加固前后现场观测试验，得到廊道两现浇边墙相对位移以及拱顶与底板相对位移随水库水位变化的规律； 4 对比分析加固前后现场观测试验与非线性有限元计算所得结果，论证加固方案的合理性，验证加固效果。

The calculation of parameter m_0,that is the amount of CO_2 absorbed by unit volume of concrete completely carbonated,was proposed by the analysis of concrete hydration process and carbonation mechanism,and the simplification formula of fly ash concrete applied in practice was suggested.The calculation of another important parameter D_e,that is the effective diffusion coefficient,was also proposed on the basis of the mechanism gas diffusion in concrete.

通过对混凝土水化过程、碳化机理的深入分析，提出了模型参数——完全碳化时单位体积混凝土吸收二氧化碳的量m_0的计算方法，并给出了工程中常用粉煤灰混凝土的简化实用公式；基于气体在混凝土中扩散机理的分析，给出了另一个重要的模型参数——二氧化碳在混凝土中有效扩散系数D_e的计算公式。

Based upon experimental study the advantages of double-admixing concrete with micro-powder of slag and ground fly ash in the application of mass concrete and high-performance concrete,which provide good references for the promotion of FS double-admixing concrete.

通过试验研究，阐述了矿渣微粉和磨细粉煤灰双掺混凝土在大体积混凝土以及高强混凝土中的应用优势，并列举了具体的实例加以验证，为FS双掺的推广奠定了基础。

The iron array electrode covered with concrete as a new electrochemical technique is applied to map the potential imaging and to investigate on the iron electrode corrosion process under concrete: In Cl- solution the corrosion of the iron array electrode covered with concrete had been prevented for a short term since the concrete protection, but the corrosion still occurreed and developed after immersed for a long time.

由于混凝土的隔离和高绝缘性，常规的电化学技术、微探针扫描技术均难于获得在腐蚀介质的浸泡下混凝土/钢筋界面，特别是不同深处的混凝土/钢筋界面的电位分布。本文提出用阵列电极法并结合电子技术和微机控制技术，获得同一水平面上混凝土/钢筋界面以及不同深处的混凝土/钢筋界面的电位分布立体信息图。

In order to investigate the physical mechanical and shrinkage properties of rubber concrete,and to invent a effective method to improve the strength of rubber concrete,this paper researched the influence of rubber crumb proportion on concrete strength,and the shrinkages of different rubber concretes were compared by employing regular concrete testing methods.

为了探讨橡胶集料混凝土的物理力学及收缩性能，寻求改善橡胶集料混凝土强度的方法，采用常规的普通混凝土物理性能实验方法研究了橡胶掺量对混凝土强度的影响，比较了不同橡胶集料混凝土的收缩情况，考察了可再分散胶粉对混凝土性能的影响。

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