- 肖力光，李紀良
2021年第6期
摘要
引用本文
摘 ? 要：利用秸稈纖維、粉煤灰及硅藻土制備了夾芯復合外掛墻板，研究了秸稈纖維長度、粉煤灰和硅藻土協同作用對秸稈水泥基材料力學性能的影響，確定了粉煤灰及硅藻土的預處理方式，通過正交試驗確定了粉煤灰、硅藻土取代水泥的最佳取代率及水灰比；利用ANSYS有限元軟件對秸稈夾芯復合外掛墻板的抗風承載力進行了數值模擬，分析了不同墻板厚度及鋼絲含量對秸稈夾芯外掛墻板抗風承載力的影響。結果表明：隨著秸稈纖維摻量的增加，試件抗壓強度逐漸下降，其中，秸稈纖維長度為5~10 mm時，秸稈水泥基材料的力學性能最佳；粉煤灰、硅藻土的最佳取代率分別為10%、4%，最佳水灰比為0.48；秸稈夾芯外掛墻板的抗風承載力滿足規范要求，增加墻板厚度及改變鋼絲布置方式均能提高秸稈夾芯復合外掛墻板的抗風承載力，且改變鋼絲布置對抗風承載力的影響顯著。
Abstract: The straw fiber, fly ash and diatomite were used to prepare sandwich composite external wallboard, and the effect of straw fiber length, fly ash and diatomite on the properties of straw cement-based materials was studied, and the ?preprocessing method of fly ash and diatomite was determined. The optimal replacement rate of fly ash and diatomite to replace cement and water-cement ratio were determined by orthogonal test. The wind resistance bearing capacity of straw sandwich composite wallboard was simulated by ANSYS software, and the influence of wall thickness and steel wire content on the wind resistance bearing capacity of straw sandwich external wallboard was analyzed. The results show that with the increase of the straw fiber content, the compressive strength decreases gradually. When the straw fiber length is 5~10 mm, the mechanical properties of straw cement-based materials are the best. The optimal replacement rate of fly ash and diatomite is 10% and 4% respectively, and the optimal water-cement ratio is 0.48. The wind resistance bearing capacity of straw sandwich external wallboard meets the requirements of the code. The wind resistance bearing capacity of straw sandwich external wallboard can be improved by increasing the wallboard thickness and changing the steel wire arrangement, and the effect of changing the steel wire arrangement on the wind resistance bearing capacity is significant.
肖力光,李紀良.秸稈夾芯復合外掛墻板的制備及抗風承載力研究[J].混凝土與水泥制品,2021(6):65-69.
XIAO L G,LI J L.Preparation and Wind Resistance Bearing Capacity of Straw Sandwich External Wall Panels[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(6):65-69.
