PVA/钢混杂纤维增强水泥基材料(HFRCC)配合比优化及评价方法  

Optimization and evaluation of PVA/steel hybrid fiber reinforced cementious composites(HFRCC)mix ratio

作　　者：王睿 张品乐[1] WANG Rui;ZHANG Pinle(School of Architectural Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《混凝土》2024年第2期126-132,141,共8页Concrete

基　　金：国家自然科学基金(52168069)。

摘　　要：将钢纤维、国产PVA纤维和日本PVA纤维按照适宜比例进行配制,不同纤维材料性能相互补充、取长补短,可以更好发挥出混杂纤维增强水泥基材料(HFRCC)的力学性能,有利于其成本控制,具有广泛应用前景。通过正交试验极差结果择优和信噪比S/N稳定性择优两种方法分析粉煤灰掺量、水胶比、砂胶比、钢纤维掺量、国产PVA掺量和日产PVA掺量对混杂纤维增强水泥基材料(HFRCC)抗拉强度和抗弯强度的影响规律,对比两种方法的结果,并建立各因素和响应量之间的回归关系,与和易性工程性能相结合,给出HFRCC的最优配合比。结果表明:信噪比S/N稳定性择优方案更加准确和全面。粉煤灰掺量、钢纤维掺量、国产PVA掺量和日产PVA掺量对HFRCC的响应量影响较大,水胶比和砂胶比影响较小;建立数学模型预测和优选配合比,HFRCC抗拉强度最大可以达到6.36 MPa,抗弯强度最大可以达到13.90 MPa,预测值和试验值之间的相对误差绝对值均接近3%,且和易性能较好。研究结果可以为混杂纤维增强水泥基材料(HFRCC)的制备提供依据。The steel fiber,the domestic PVA fiber and the Japanese PVA fiber are prepared according to the appropriate proportion.The properties of different fiber materials complement each other and learn from each other.The mechanical properties of hybrid fiber reinforced cementious composites(HFRCC)can be better played,which is conducive to the cost control and has a wide application prospect.The effects of fly ash content,water binder ratio,sand binder ratio,steel fiber content,domestic PVA content and Japanese PVA content on the tensile strength and flexure strength of hybrid fiber reinforced cementious composites(HFRCC)were analyzed by using two methods of orthogonal test range selection and SNR stability selection.The results of the two methods were compared.The regression relationship between each factor and response quantity was established,and the optimal mix ratio of HFRCC was given by combining with the workability engineering performance.The results show that the optimal S/N stability scheme is more accurate and comprehensive.Fly ash content,steel fiber content,domestic PVA content and Japanese PVA content have great influence on the HFRCC response,but the water binder ratio and sand binder ratio have little influence.The mathematical model was established to predict and optimize the mix ratio.The maximum tensile strength and bending strength of HFRCC can reach 6.36 MPa and 13.90 MPa,and the absolute relative errors between the predicted value and the test value are close to 3%,and the compatibility performance is good.The results can provide a basis for the preparation of hybrid fiber reinforced cementious composites(HFRCC).

关 键 词：混杂纤维增强水泥基材料(HFRCC) PVA纤维 力学性能 正交试验 信噪比S/N 配合比优化 

分 类 号：TU528.062[建筑科学—建筑技术科学]