基于响应面法的高性能复合砂浆参数优化研究

Parameter Optimization of High Performance Composite Mortar Based on Response Surface Methodology

【目的】研究高性能复合砂浆配合比设计参数。【方法】采用响应面Box-behnken试验设计法开展了硅灰掺量、水胶比和石英粉与石英砂比值等3个自变量对高性能复合砂浆抗压强度的影响研究,经响应面预测、验证获得最佳配合比参数。【结果】高性能复合砂浆的抗压强度随着水胶比的增大而减小;随着硅灰掺量的增加,略有增加,但增幅较小;随着石英粉/石英砂增加或减小影响程度并不明显。【结论】所建模型在试验范围内能较准确地预测结果,响应面法用于高性能复合砂浆配合比参数优化具有准确性与科学性。

[Purposes]This paper aims to study the design parameters of the mix ratio of highperformance composite mortar.[Methods]The Box-behnken test design method was used to study the effects of three independent variables on the compressive strength of high-performance composite mortar,namely,the content of silica fume,the water-binder ratio and the ratio of quartz powder to quartz sand.The optimal mix ratio parameters were obtained by the response surface prediction and verification.[Findings]The compressive strength of high-performance composite mortar decreased with the increase of water-binder ratio.With the increase of silica fume content,it increases slightly,but the increase is small.With the increase or decrease of quartz powder/quartz sand,the degree of effect is not obvious.[Conclusions]The established model can predict the results more accurately in the test range,and the response surface method is accurate and scientific in the optimization of the mix ratio parameters of highperformance composite mortar.