采用固硫灰渣替代水泥制作泡沫轻质土,可有效降低成本。通过比选不同的活性激发方式对固硫灰渣活性的影响,进一步提高了固硫灰渣在泡沫轻质土中的掺量。采用化学激发的方式最有效,DEIPA激发剂的最佳掺量为0.04%,与未改性前相比提高了26...采用固硫灰渣替代水泥制作泡沫轻质土,可有效降低成本。通过比选不同的活性激发方式对固硫灰渣活性的影响,进一步提高了固硫灰渣在泡沫轻质土中的掺量。采用化学激发的方式最有效,DEIPA激发剂的最佳掺量为0.04%,与未改性前相比提高了26%。过筛处理对材料的强度和流值没有明确区别。机械磨细虽然能提高材料的早期强度,但是过细的粒径会导致材料消泡。因此推荐采用化学激发的方式提高固硫灰渣的掺量。分析了固硫灰渣基泡沫轻质土材料的吸水率、密度、强度、软化系数等,给出推荐固硫灰渣掺量为280 kg/m3。随着养护龄期的增加,材料的吸水率逐渐降低,密度相对稳定。强度随着水泥掺量的增加而增加,在干燥环境下,强度无明显变化。软化系数均大于0.85,水稳系数较高。Using desulfurized slag to replace cement in the production of foamed lightweight soil can effectively reduce costs. By comparing different methods of activating the activity of desulfurized slag, the amount of desulfurized slag added to the foamed lightweight soil was further increased. The chemical activation method is the most effective, with the optimal dosage of DEIPA activator being 0.04%, an increase of 26% compared to before modification. Screening treatment does not have a clear difference in the strength and flow value of the material. Although mechanical grinding can improve the early strength of the material, overly fine particle size will cause the material to deflate. Therefore, chemical activation is recommended to increase the amount of desulfurized slag added. The water absorption rate, density, strength, and softening coefficient of the desulfurized slag-based foamed lightweight soil material were analyzed, and it is recommended that the desulfurized slag content be 280 kg/m3. As the curing age increases, the water absorption rate of the material gradually decreases, while the density remains relatively stable. The strength increases with the increase in cement content, and there is no significant change in strength under dry conditions. The softening coefficient is all greater than 0.85, and the water stability coefficient is high.展开更多
通过高炉矿渣基固化施工现场的弃土,制备流态固化土,以满足狭窄区域回填的需要。为改善流态固化土的力学性能,探究了高炉矿渣与水泥之间的掺配比。并进一步分析同一固化剂掺量下,不同水固比对流态固化土的流值、泌水率、强度的影响。流...通过高炉矿渣基固化施工现场的弃土,制备流态固化土,以满足狭窄区域回填的需要。为改善流态固化土的力学性能,探究了高炉矿渣与水泥之间的掺配比。并进一步分析同一固化剂掺量下,不同水固比对流态固化土的流值、泌水率、强度的影响。流值随水固比的增大而显著增大。泌水率均满足材料性能要求,且给出泌水率与流值的关系。强度随着水固比的增大先增大后减小,当水固比0.48,强度最佳。Flowable solidified soil was prepared from the discarded soil at the construction site of a blast furnace slag-based solidification to meet the needs of backfilling in narrow areas. To improve the mechanical properties of the flowable solidified soil, the blend ratio between blast furnace slag and cement was explored. Furthermore, the effects of different water-to-solid ratios on the flow value, permeability rate, and strength of the flowable solidified soil under the same amount of solidifying agent were analyzed. The flow value significantly increased with the increase of the water-to-solid ratio. The permeability rates all met the material performance requirements, and the relationship between permeability rate and flow value was given. The strength first increased and then decreased with the increase of the water-to-solid ratio, and when the water-to-solid ratio was 0.48, the strength was optimal.展开更多
文摘采用固硫灰渣替代水泥制作泡沫轻质土,可有效降低成本。通过比选不同的活性激发方式对固硫灰渣活性的影响,进一步提高了固硫灰渣在泡沫轻质土中的掺量。采用化学激发的方式最有效,DEIPA激发剂的最佳掺量为0.04%,与未改性前相比提高了26%。过筛处理对材料的强度和流值没有明确区别。机械磨细虽然能提高材料的早期强度,但是过细的粒径会导致材料消泡。因此推荐采用化学激发的方式提高固硫灰渣的掺量。分析了固硫灰渣基泡沫轻质土材料的吸水率、密度、强度、软化系数等,给出推荐固硫灰渣掺量为280 kg/m3。随着养护龄期的增加,材料的吸水率逐渐降低,密度相对稳定。强度随着水泥掺量的增加而增加,在干燥环境下,强度无明显变化。软化系数均大于0.85,水稳系数较高。Using desulfurized slag to replace cement in the production of foamed lightweight soil can effectively reduce costs. By comparing different methods of activating the activity of desulfurized slag, the amount of desulfurized slag added to the foamed lightweight soil was further increased. The chemical activation method is the most effective, with the optimal dosage of DEIPA activator being 0.04%, an increase of 26% compared to before modification. Screening treatment does not have a clear difference in the strength and flow value of the material. Although mechanical grinding can improve the early strength of the material, overly fine particle size will cause the material to deflate. Therefore, chemical activation is recommended to increase the amount of desulfurized slag added. The water absorption rate, density, strength, and softening coefficient of the desulfurized slag-based foamed lightweight soil material were analyzed, and it is recommended that the desulfurized slag content be 280 kg/m3. As the curing age increases, the water absorption rate of the material gradually decreases, while the density remains relatively stable. The strength increases with the increase in cement content, and there is no significant change in strength under dry conditions. The softening coefficient is all greater than 0.85, and the water stability coefficient is high.
文摘通过高炉矿渣基固化施工现场的弃土,制备流态固化土,以满足狭窄区域回填的需要。为改善流态固化土的力学性能,探究了高炉矿渣与水泥之间的掺配比。并进一步分析同一固化剂掺量下,不同水固比对流态固化土的流值、泌水率、强度的影响。流值随水固比的增大而显著增大。泌水率均满足材料性能要求,且给出泌水率与流值的关系。强度随着水固比的增大先增大后减小,当水固比0.48,强度最佳。Flowable solidified soil was prepared from the discarded soil at the construction site of a blast furnace slag-based solidification to meet the needs of backfilling in narrow areas. To improve the mechanical properties of the flowable solidified soil, the blend ratio between blast furnace slag and cement was explored. Furthermore, the effects of different water-to-solid ratios on the flow value, permeability rate, and strength of the flowable solidified soil under the same amount of solidifying agent were analyzed. The flow value significantly increased with the increase of the water-to-solid ratio. The permeability rates all met the material performance requirements, and the relationship between permeability rate and flow value was given. The strength first increased and then decreased with the increase of the water-to-solid ratio, and when the water-to-solid ratio was 0.48, the strength was optimal.
