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From the 50s of last century's first prestressed concrete bridge built so far, especially since the reform and opening up, China has built a large number of prestressed concrete bridge.

杂谈 从上世纪50年代首座预应力混凝土桥梁修建至今，特别是改革开放以来，我国已经修建了大量的预应力混凝土桥梁。

The main production and sales of concrete admixture series, the company was founded in 2006, are professional manufacturers of new admixture production, advanced production technology, a unique management tool to enable the company soon a large number of concrete alongside the dramatic title of the manufacturer.

主要生产销售混凝土外加剂系列，公司成立于2006年，是新型外加剂生产专业厂家，先进的生产工艺，独特的管理手段使本公司很快傲立于众多的混凝土生产厂家的头衔。

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。

The experiment shows the specimen's freezing and thawing repellence of 100% recycled aggregate concrete with city garbage melting slag, compared with specimen of the normal concrete whose coarse and fine aggregate's replacement ratio is 0%,the durability number indexes of using water and cement ratio 0.45 and 0.65 respectively decreased 5.3% and 7.9%,but all can satisfy the lowest index for evaluating freezing and thawing repellence.

试验结果表明，城市垃圾熔渣再生混凝土试件的冻融循环抵抗性与粗、细骨料置换率为0%的普通混凝土试件相比，水灰比0.45、0.65时的耐久性指数分别降低5.3%和7.9%，但都能满足评价冻融循环抵抗性的最低指标。

So we suggest in design of the jacketing steel reinforced concrete frames prestressed with bonded tendons for storey-adding, in the area of earthquake fortification intensity of degree 8, steel reinforced concrete frames prestressed with bonded tendons situated in Class II and III soil with the height of ground floor is 8.1m and the number of added stories is 2 to 4, multiplying coefficient of bending moment of column, detail of seismic design of beam, column, and joint, should conform to a higher one earthquake-resistant grade.

建议套建增层预应力钢骨混凝土框架结构设计时对于8度抗震设防区建造在II、III类场地土上的底层结构层高为8.1m，增层层数为2层到4层的原二级抗震框架其柱端弯矩增大系数及相应的梁、柱、节点的抗震构造措施应按一级抗震框架取用。

Owing to the fact that construction enterprise realized the usage superiority of long boom truck-mounted concrete pump gradually, at the same time ,owing to a large number of increment for small high-story buildings in city, quantity of truck-mounted pump with boom support length over 42m increases rapidly at commercial concrete market of Shanghai city since it started in the latter half of 2005, pump delivery price of 28 yuans per m3 also propelled fast development of long boom truck-mounted pump samely.

企业包袱沉重、机构人员臃肿、设备实力弱（2 1.5m3和2 1m3搅拌机组）等缺陷使省建混凝土公司在激烈的市场竞争中逐渐处于劣势。省建公司在南京市的工程本身就很少，这也使得混凝土公司全部对外经营，享受不到任何大树底下好乘凉的美妙感觉。

Bubble Act in accordance with the parameters determined the number of bubbles in the hardening concrete, the size and spacing, concrete calculation of gas, air space, and other factors to evaluate the parameters of the concrete structure of antifreeze.

气泡参数法根据测定硬化混凝土中气泡数量、大小和间距，计算混凝土含气量检测仪器、气泡间距系数等参数来评价混凝土结构的抗冻性。

Bubble Act in accordance with the parameters determined the number of bubbles in the hardening concrete, the size and spacing, concrete calculation of gas, air space, and other factors to evaluate the parameters of the concrete structure of antifreeze.

气泡参数法根据测定硬化混凝土中气泡数量、大小和间距，计算混凝土含气量、气泡间距系数等参数来评价混凝土结构的抗冻性。

Need at design diagram paper top elucidation of have and design the lotus carry standard, size unit, foundation loading dint of request, the stone anticipate mark number and sand syrup mark number, concrete mark number and reinforcing bar grade and other necessity of elucidation

需在设计图纸上说明的有设计荷载标准，尺寸单位、地基承载力的要求、石料标号和砂浆标号、混凝土标号和钢筋等级以及其他必要的说明

In order to prevent stratification of concrete, concrete did not dare to die after the full vibration, a large number of bubbles do not come out schedule would lead to hardening the surface of concrete structure surface cellular Ma.

为了防止混凝土分层，混凝土入模后不敢充分振捣，大量的气泡排不出来，也会导致硬化混凝土结构表面出现蜂窝麻面。

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。