This paper proposed the reasonable amount and the temperature of adding silica flour after studying the strength retrogression of Romania S_2 oil cement at high temperature.
本文通过研究罗马尼亚s_2油井水泥在高温下形成水泥石的强度衰退规律，提出合理的加砂量并讨论了应加砂的温度范围。
According to the testing and studying, ultimate strength, elongation and shrinkage on cross section of two kinds of steel bar were determined.
通过测试研究还得到两种钢筋的极限强度、延伸率和断面收缩率等其他高温力学性能参数。
It provides theoretical basis for determining geotechnical slip surface and has a guiding significance for studying geotechnical strength criterion.
为岩土滑移面的确定提供了理论依据，对研究岩土强度准则具有指导意义。
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