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研究了不同浓度(0.5、1.5、2.5、3.5mol/L和4.5mol/L)的镁添加剂对微生物水泥基材料力学性能的影响,并结合X射线衍射和扫描电子显微镜分析了微生物水泥基材料内部形成的矿物成分和微观结构。结果表明:当镁添加剂浓度为2.5 mol/L时,微生物水泥基材料孔隙率最小,结构最为密实,抗压强度最高;镁添加剂浓度较低(0.5mol/L和1.5mol/L)时,在微生物水泥基材料内部形成的矿物主要是方解石和高镁方解石,形貌以花菜形为主;镁添加剂浓度较高(2.5、3.5mol/L和4.5mol/L)时,砂柱内部形成的矿物主要是单水碳钙石和菱镁矿,矿物形貌以球柱状为主。
The effects of different concentrations of magnesium additives (0.5, 1.5, 2.5, 3.5 mol / L and 4.5 mol / L) on the mechanical properties of microbial cement-based materials were investigated. The effects of different concentrations of magnesium additives on the mechanical properties of the cement- The formation of mineral composition and microstructure. The results showed that when the concentration of magnesium additive is 2.5 mol / L, the porosity of microbial cement-based material is the smallest, the structure is the most compact, and the compressive strength is the highest. When magnesium additive concentration is low (0.5 mol / L and 1.5 mol / L) Microfine-based materials within the cement-based materials are mainly calcite and high-Mg calcite, the main cauliflower-shaped morphology; magnesium additive concentrations higher (2.5,3.5mol / L and 4.5mol / L), the sand column formed within the mineral Mainly single water carbendazim and magnesite, mineral morphology dominated by spherical columnar.