Factorial Design Approach in Proportioning Prestressed Self-Compacting Concrete.
Factorial Design Approach in Proportioning Prestressed Self-Compacting Concrete.
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DOI：
10.3390/ma8031089
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发表时间：
2015-03-13
期刊：
影响因子：
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通讯作者：
Wang WL
中科院分区：
文献类型：
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作者：
Long WJ;Khayat KH;Lemieux G;Xing F;Wang WL
为了模拟混合料参数和材料性能对硬化性能的影响，预应力自密实混凝土（SCC），也调查的统计模型的扩展，析因设计，以确定这些主要参数的相对重要性和它们之间的相互作用的力学和粘弹性性能的SCC。除了在模拟区域−1至+1中评价的16个分数阶乘混合物外，还在极值−2和+2处制备了8个轴向混合物，其他变量保持在中心点。还评价了4个重复中心混合物。讨论了胶凝材料种类、胶凝材料用量、粘度调节剂（VMA）掺量、水胶比（w/cm）、砂砂比（S/A）等5个混合料参数对混合料抗压强度、弹性模量、自收缩和干缩的影响。模型的应用，以更好地了解混合物参数之间的权衡，并进行各种响应之间的比较也突出显示。逻辑设计方法是使用现有模型来预测最佳设计，然后运行选定的测试来量化新粘合剂对模型的影响。
In order to model the effect of mixture parameters and material properties on the hardened properties of, prestressed self-compacting concrete (SCC), and also to investigate the extensions of the statistical models, a factorial design was employed to identify the relative significance of these primary parameters and their interactions in terms of the mechanical and visco-elastic properties of SCC. In addition to the 16 fractional factorial mixtures evaluated in the modeled region of −1 to +1, eight axial mixtures were prepared at extreme values of −2 and +2 with the other variables maintained at the central points. Four replicate central mixtures were also evaluated. The effects of five mixture parameters, including binder type, binder content, dosage of viscosity-modifying admixture (VMA), water-cementitious material ratio (w/cm), and sand-to-total aggregate ratio (S/A) on compressive strength, modulus of elasticity, as well as autogenous and drying shrinkage are discussed. The applications of the models to better understand trade-offs between mixture parameters and carry out comparisons among various responses are also highlighted. A logical design approach would be to use the existing model to predict the optimal design, and then run selected tests to quantify the influence of the new binder on the model.