不同含水率条件下赤泥掺量对红黏土力学性质及结构的影响

本文通过在不同含水量条件下对等比例赤泥改良红黏土的物理力学性质进行试验研究，研究含水量对赤泥红黏土的影响和作用机理。再通过电镜扫描，研究不同比例赤泥对红黏土微观结构的影响。试验结果表明，宏观上，掺入赤泥后红黏土随着含水量的增大，抗剪强度呈先增后减的趋势。压缩试验研究中，掺入赤泥的红黏土压缩性随含水量的增大整体呈降低趋势，下降幅度随着赤泥含量的增大而增大。微观上，不同赤泥含量的红黏土土样表面颗粒从团聚体向片状体变化，结构从疏松状态逐渐向致密状态过渡，孔隙减少使得赤泥红黏土的吸水能力减弱。

RESEARCH ON THE MECHANICAL PROPERTIES AND MICROSTRUCTURE OF DIFFERENT RED MUD ADDITIVE ON RED CLAY UNDER VARIOUS WATER CONTENTS

Based on the research of the physical and mechanical properties of different red mud additive on red clay under various water contents, this paper show the influence and mechanism of red clay under different amount of red mud with moisture content. By scanning electron microscopy, this experiment explores the effect of soil samples on the microstructure. In the larger sense, the results show that sheer strength of soil, which is incorporatied into red mud in different ratio, increases at first and then decreases as the increase of moisture content. Compression test show that, the compressibility decreased with increasing moisture content, and the decrease amplitude increases with the growth of red mud content. From microscopic view point, the red mud additive can change the aggregation of soil particles into prothallial plate; the loose structure became denser; the reduction of pore space also makes its capacity of absorbing water is declining.