用生石灰改良膨胀岩基床的室内试验研究

Experimental research on swelling rocks′ roadbed improved with lime additive

阐述了膨胀岩基床病害的发生机理。以生石灰作为改良剂，通过室内试验，从强碱环境和多次干湿循环后的无侧限抗压强度两方面综合考虑，确定了最佳生石灰掺入量。研究了用生石灰改良膨胀岩的工程性质，从而降低了膨胀岩的湿化性和膨胀性，提高了无侧限抗压强度。

The mechanism of diseases occurred in swelling rocks′ roadbed is described in this paper When the lime is used as improvement agent, the optimum lime additive amounts are determined on the basis of the comprehesive consideration of both alkali environment and unconfined compression strength after many cycles of drying and wetting in laboratory test The engineering properties of improved swelling rock with decreased slaking and swelling characteristics and increased strength are studied