The influence of multiple factors – namely, cement type, cement strength grade, cement content and water–binder ratio – on the basic performance, including the slump and early compressive strength, of basic magnesium sulfate (MgSO₄) cement (BMSC) concrete was researched. In addition, multiple non-linear regression models of the basic performance of BMSC considering the raw materials and mix proportions were proposed. The results show that when the apparent density and water–binder ratios of BMSC were constant, the slump of BMSC increased and the early compressive strength decreased with the increase in the cement content. With the increase in the water–binder ratio, the slump of BMSC increased gradually and the early compressive strength decreased gradually. With the increase in the cement strength grade, the slump and early compressive strength values of BMSC all increased. The slump and standard cube compressive strengths of BMSC had a multiple non-linear power function relationship with the cement strength grade, cement content and water–binder ratio. When the cement content of BMSC was 530 kg/m³, the standard cube compressive strength grade of BMSC that was mixed with fly ash reached 82.7 MPa, and the standard cube compressive strength grade of BMSC that was mixed with slag reached 70.5 MPa.

中文翻译：

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碱性硫酸镁水泥混凝土基本性能研究

多种因素（即水泥类型，水泥强度等级，水泥含量和水灰比）对碱性硫酸镁（MgSO ₄的坍落度和早期抗压强度）的基本性能的影响）研究了水泥（BMSC）混凝土。此外，提出了考虑原料和混合比例的BMSC基本性能的多个非线性回归模型。结果表明，当BMSC的表观密度和水灰比恒定时，随着水泥含量的增加，BMSC的坍落度增加，早期抗压强度降低。随着水胶比的增加，BMSC的坍落度逐渐增加，早期抗压强度逐渐降低。随着水泥强度等级的提高，BMSC的坍落度和早期抗压强度值均增加。BMSC的坍落度和标准立方抗压强度与水泥强度等级，水泥含量和水灰比具有多重非线性幂函数关系。^{如图3所示}，与粉煤灰混合的BMSC的标准立方抗压强度等级达到82.7 MPa，与炉渣混合的BMSC的标准立方抗压强度等级达到70.5 MPa。