原料配比对氯氧镁水泥固化砾石土干密度的影响

The Influence of Raw Material Ratio of Magnesium Oxychloride Cement on Dry Density of Solidified Gravel Soil

干密度是评价软土固化质量的重要指标,一般通过室内击实试验获得。以氯氧镁水泥(MOC)为结合料,砾石土为固化对象,研究了原料配比对MOC固化砾石土击实性能的影响。通过室内击实试验,考察了轻烧镁粉掺量、卤水浓度、卤水掺量和活性MgO/MgCl_2物质的量比(Mg/Cl比)影响混合料干密度的规律。结果表明:MOC固化砾石土击实料的干密度随卤水掺量增加先增加后降低,随轻烧镁粉掺量及Mg/Cl比的增加而先增加后降低,随卤水浓度及轻烧镁粉掺量的增加而增加,随卤水浓度增加及Mg/Cl比降低而增加。

Dry density is an important indicator of the quality of soft soil solidification generally obtained by indoor compaction test. The effects of raw material ratio on the densification performance of gravel soil consolidated by magnesium oxychloride cement（ MOC） were studied. The compaction test were carried out considering the effects of light ｜ burn magnesia content,brine concentration,brine content,and active Mg O/Mg Cl2 ratio（ Mg/Cl） on the dry density of solidified gravel soil. The results reveals that the dry density of the gravel soil solidified with MOC increased firstly and then decreased with the increase of brine content,increased firstly and then decreased with the increase of light-burn magnesia content and Mg/Cl,increased with the increasing of brine concentration and light-burn magnesia content,and increased with the increase of brine concentration and the decrease of Mg/Cl.