查询词典 concrete

The acid rain attack not only made concrete surface desquamate,aggregates denudate,but also made concrete mass decrease,compressive strength reduce and neutralization depth increase.

结果表明，酸雨不仅使混凝土表面出现剥蚀、骨料外露，还使混凝土质量减小、强度降低、中性化深度加大。

In order to decrease the unit cost of concrete and increase the utilization of local building material, this paper, dealing with practical projection, studies on preparation of concrete with low-quality diabase and green sand as aggregates through experiment.

本文结合实际工程，立足于降低工程所需混凝土配制成本和提高地产建筑材料的利用水平，对使用低品质辉绿岩和细砂配制系列混凝土进行了试验研究。

The results show that:(1) No matter the fine aggregate using medium sand or fine sand, the strength of diabase concrete will be always a little higher than that of limestone concrete.

本文首先对地产的两种材料——辉绿岩和青砂进行调查评估，指出两种材料品质不良。

As the first part of a research program to obtain a quantitative design method for overcoming diagonal cracks in cast-in-site concrete floor due to shrinkage and temperature differences, 12 RC concrete slabs strengthened by WMM were tested. The influence of layer number and volume fraction of wire mesh on crack space and width were discussed.

作为定量解决房屋现浇楼板收缩温差斜角裂缝问题研究的开端，用钢丝网砂浆对12块板现浇钢筋混凝土板进行加固和对比试验研究，探讨了钢丝网层数和配筋率对裂缝间距和宽度的影响。

We can produce various kind of diamond core drill segment. Also according to different type of bricks and concrete (especially for reinforced concrete with different aggregate), we can adjust of segment to reach maximum speed and life.

我们能生产多种类型的薄壁钻刀头，并能根据不同标号的砖混结构，水泥及沙石（软硬花岗岩、石英石和鹅卵石）调整配方，以达到相对应的速度和寿命的要求。

The first batch cracks of concrete bodies in South China had been caused by temperature stresses of cement hydration heat.While the double-action of (1) expansion stress of concrete and (2) temperature stress of day and night's difference of temeperature had been mainly the cause of cracks.

在南方地区，混凝土墙体拆模后的第一批裂缝是由于水泥水化热引起的温度应力造成的，而混凝土收缩引起的收缩应力与昼夜温差引起的温度应力的双重作用，则是导致后续裂缝的主要原因。

Utilizing plane sectorial domain Hamilton system function via variable substitutes and eigenfunction expansion method, an analytical element is proposed in this paper for the crack analysis of reinforced concrete structures combining the bridging model and Dugdale model. Combined with finite element, nolinear crack problems of reinforced concrete structure can be analyzed.

利用平面扇形域哈密顿体系方程，通过分离变量法及共轭辛本征函数向量展开法，结合Dugdale模型和桥联力模型，推导了钢筋混凝土结构裂纹尖端的解析元列式，将此解析元与普通有限元结合，可用于分析钢筋混凝土的非线性断裂问题。

Systematical researches were carried out on the cleavage strength of steel fiber concrete with 3 base strength grades,6 steel externalities and 4 fiber admixtures,and it is discovered that the cleavage strength of concrete increases as the base strength grade rises,and dumbbell-like,shield-like and hook-like steel fibers have good reinforcement effect while flat steel fiber has less reinforcement effect.

通过对3个基体强度等级、6种纤维外形、4种纤维掺量的钢纤维混凝土的劈拉性能进行系统研究，发现混凝土的劈拉强度均随基体强度等级增加而增大；哑铃、盾铃、端勾形钢纤维的增强效果较好，而平直形钢纤维的增强效果较小。

Different countries have different views in whether or not to entrain air in concrete, especially in prestressed reinforced concrete.

然而是否可以在预应力混凝土结构中引气，国内外规范中存在较大差异。

The signal test table is established where the Labview signal collection system collects the concrete exit pressure signals, the piston displacement signals of concrete cylinder and the main hydraulic signals. The real measured signals are processed through arithmetic equilibrant filter of the data signal processing method. The pumping efficiency and relative error of real time output are measured by two output calculation methods.

搭建了实测信号试验台，通过Labview信号采集系统现场采集混凝土出口压力信号、混凝土缸活塞位移信号和主液油信号，采用算术平均滤波法的数字信号处理方法对实测信号进行处理，通过两种排量计算方案检测泵车实时排量的泵送效率和相对误差。

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。