襄樊膨胀土的矿物成分及化学特征对其胀缩性能的影响研究
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摘要: 本文以工程实例研究了膨胀土的矿物成分及化学特征对膨胀土胀缩性能的影响,认为蒙脱石含量及阳离子交换容量(CEC)是影响膨胀土胀缩性能的主要内在因素,而蒙脱石含量的增长将引起膨胀土自由膨胀率的线性增长,同时从矿物微观结构方面说明了其影响机理。Abstract: The effects of minerals compositions and chemical characteristics on expansive soil's swelling and shrinkage are analysed by engineering practice in this paper. It is proposed that the content of montmorillonite and the exchange capacity of cation (CEC) is main internal factors which influence swelling and shrinkage of expansive soil, and the increase of the content of montmorillonite will cause linear increase of the free swell of expansive soil's and the mechanism of influence arc analysed from microstructures of minerals.
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