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首页> 外文会议>Forth International Symposium on Roller Compacted Concrete (RCC) Dams; Nov 17-19, 2003; Madrid, Spain >Effects on Roller Compacted Concrete of Isfahan slag
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Effects on Roller Compacted Concrete of Isfahan slag

机译：伊斯法罕矿渣对碾压混凝土的影响

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摘要

A large steel industry in located in Isfahan, Iran, which is situated near by the site of a number of large hydraulic/hydropower projects. A laboratory research study was undertaken to investigate the effect of ground blast-furnace slag on RCC. Working time, allowable delay between mixing and compaction, could be a major concern in some projects when the site is difficult and/or the contractor is not fully developed. The effect of ground blast-furnace slag on allowable working time of RCC was the main aim of the research. In addition, the effect of slag on the strength of RCC at different age was also studied. A number of cylindrical laboratory specimens were prepared. Most specimens were vibrated using Vebe test apparatus for the compaction of RCC. To study the effect of compaction methods, a number of samples were also compacted with the same type of hammer that is used for the modified Proctor test. The amount of cementitious content (Portland cement plus slag) was varied from 75 to 300 kg/m~3. Slag content varied from 25 to 90 percent. The compaction of samples deliberately delayed for 30, 45, 60, 90 & 120 minutes to study the effect of working time. It was concluded that slag content has an important effect on working time. It is a high content of slag could allow a longer allowable working time for RCC. Those samples were constructed at optimum water content using hammer presented a higher strength than those constructed by VB apparatus. When a high content of slag is used, the increase of slag would slightly decrease the strength. However, the rate of strength reduction due to the increase of slag is not high when a high content of slag is used.
机译：伊朗伊斯法罕的一家大型钢铁工业位于许多大型水力/水力发电项目的所在地附近。进行了一项实验室研究，以研究高炉渣对碾压混凝土的影响。在一些工地困难和/或承包商未充分开发的项目中，工作时间，混合和压实之间的允许延迟可能是一些主要问题。高炉渣对碾压混凝土允许工作时间的影响是研究的主要目的。此外，还研究了炉渣对不同年龄碾压混凝土强度的影响。准备了许多圆柱形的实验室标本。大多数样品使用Vebe测试仪振动以压实RCC。为了研究压实方法的效果，还使用与改进的Proctor测试相同的锤子压实了许多样品。胶结物含量（波特兰水泥加矿渣）为75至300 kg / m〜3。炉渣含量从25％到90％不等。故意压实样品30、45、60、90和120分钟，以研究工作时间的影响。结论是炉渣含量对工作时间有重要影响。炉渣含量高可能会使RCC的允许工作时间更长。这些样品是用锤子在最佳含水量下构造的，其强度要高于VB仪器。当使用高含量的炉渣时，炉渣的增加会稍微降低强度。然而，当使用高含量的炉渣时，由于炉渣的增加而导致的强度降低率并不高。

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