考虑酸碱迁移的电渗一维固结计算方法

电渗法和常规的软土地基处理方法相比具有独特的优越性。在Esrig一维电渗的基础上考虑了酸碱离子迁移,同时基于电荷守恒原理、质量守恒原理、达西定律以及欧姆定律等定律建立电渗固结方程组。通过对数值解和室内试验结果进行比较分析,得到了:电势随时间减少,但是减少量逐渐减小并趋于稳定;土体内部产生的负孔隙水压力并非如Esrig理论所述,到了峰值以后不再变化,而是会有一定程度的恢复。

赤泥烧结多孔保温材料制备过程中碱迁移研究

利用赤泥来制备多孔保温材料是大量消耗赤泥的有效方法。本文研究了利用山西赤泥制备多孔保温材料时干法和湿法工艺条件下样品的表层和核心处组成和pH随温度的变化规律,获得了不同制备方式下赤泥制备烧结保温材料时碱的赋存形式、从核心向表层迁移和随温度的转化规律。

Penetrative and migratory behavior of alkali metal in different binder based TiB_2-C composite cathodes

In electrolyte melts containing K at low temperature, the penetrative and migratory path of alkali metals （K and Na） in pitch, furan, phenolic aldehyde and epoxy based TiB2-C composite cathodes during the electrolysis process were studied by EDS and self-made modified Rapoport apparatus. The electrolysis expansion rates, the diffusion coefficients of the alkali metals and the corrosion rates of the composite cathode were also calculated and discussed. The results show that no matter what kind of binder is used, alkali metals have the same penetrative path in composite cathodes：firstly in pore, then in binder and finally in carbonaceous aggregates. K and Na penetrate into both binder and carbonaceous aggregates, which leads to the expansion of composite cathodes, and K has stronger penetration ability than Na. Electrolysis expansion rate of resin based composite cathode is smaller than that of pitch based composite cathodes, and so do the diffusion coefficient and corrosion rate. Resin based composite cathode has better resistance ability to the penetration of alkali metals than pith based composite cathode, and phenolic aldehyde based composite cathode exhibits the strongest resistance ability. The penetration rate, the diffusion coefficient of alkali metals in phenolic aldehyde based TiB2-C composite cathode and the corresponding corrosion rate are 4.72 mm/h, 2.24×10^-5 cm^2/s and 2.31 mm/a, respectively.

论砂岩储层次生孔隙的形成机制

本文提出了碱性成岩环境有助于砂岩储层次生孔隙发育这一全新的观点，并提出了单一成岩环境体系中的“酸—碱链式反应”模型。无疑，这会对储层演化和油气勘探提出新的思考。