自制水化硅酸钙晶种粉强化底泥基砂浆力学性能试验研究OA

On the basis of detailed investigation of the mineral composition,particle size distribution and other physicochemical characteristics of the substrate,and utilizing the micro-absorption effect of homemade hydrated calcium silicate crystal seed powder,the use of overlaying technology on the bottom of the Inner Mongolia section of the Wuhai Lake substrate self-coagulation excitation treatment was carried out.This process results in the preparation of self-consolidation sediment-based materials.By testing the performance of self-consolidation sediment-based mortar specimens with varying admixtures,the influence of admixture content on the workability,flow characteristics,and mechanical strength of the self-consolidation sediment-based mortar was investigated.By using XRD and pore structure analysis,the micro-morphology development law of hydration products and the time-dependent change process of internal pore structure of self-consolidation sediment mortar cementitious body were revealed.It is found that the optimal amount of self-consolidation cement is 15%,and the consumption of bottom cement sediment and the loss of mortar strength are relatively appropriate.The incorporation of self-consolidation cement-based materials optimizes the composition of hydration pro-ducts in the mortar interface area,reduces the nucleation barrier of hydration products,enhances the degree of hydration,and improves the internal structure of the mortar densification.The increase in the proportion of coagulating pores in the pore structure is beneficial to the formation of a dense mesh struc-ture,which improves the compressive strength of the mortar.This study indicates to some extent that the substrate-based material after excitation treatment of homemade hydrated calcium silicate crystal seed powder,can effectively replace cement.This finding provides insights for the application of engi-neering components in ecological restoration projects in mining areas.