基于RSM的粉煤灰地聚合物注浆材料优化设计

Optimization design of fly ash ground polymer grouting material based on RSM

为有效解决粉煤灰基地聚合物注浆材料(FGGM)的配比优化问题,提出了基于响应面法(RSM)对FGGM体系的试验设计。通过创建二次多项式预测模型和方差分析,探究了矿渣含量A、水玻璃浓度B和水胶比C三因素的作用及其之间的交互作用对FGGM流动性和28 d抗压强度的影响规律。研究结果表明:水胶比对FGGM流动性影响极其显著,对流动性影响的强弱顺序依次为水胶比>水玻璃浓度>矿渣含量;28 d抗压强度影响的强弱顺序为矿渣含量>水胶比>水玻璃浓度。利用RSM分析得到FGGM的最优配合比为:A为28.8%,B为1.37 mol/kg,C为0.56,其流动性与28 d抗压强度均满足注浆性能要求,且实际值与预测值的相对误差均在合理范围内,证明了RSM能有效优化配比,并具有较好的预测能力。

To effectively solve the optimization problem of the mix design for fly ash-based polymer grouting material(FGGM),the response surface methodology was used to design the FGGM system.The effects of slag content A,sodium silicate concentration B and water-to-binder ratio C and their interaction effects on the fluidity and 28 d compressive strength of FGGM were investigated by creating quadratic polynomial prediction model and variance analysis.The results show that the ratio has the most significant effect on the fluidity of FGGM,followed by sodium silicate concentration and slag content,while slag content shows the most notable influence on the 28 d compressive strength,followed by w/b ratio and sodium silicate concentration.The results of RSM analysis indicates that,with the optimal mix proportion of A=28.8%,B=1.37 mol/kg,and water-to-binder ratio=0.56,FGGM can provide desirable fluidity and 28 d compressive strength,complying with all the requirements for grouting materials.Moreover,the relative error between actual value and predicted value was within a reasonable range,which verifies that RSM can effectively optimize the mix design of FGGM and has accurate prediction ability.