硅酸盐通报2018，Vol.37Issue(6)：1813-1817,5.
纤维特性对砂加气混凝土力学性能和微观结构的影响
Effect of Fiber Properties on Mechanical Properties and Microstructures of Autoclaved Aerated Concrete
摘要
Abstract
Autoclaved aerated concrete is easy to appear the phenomenon of lack of edge drop horn during the production process because of its poor toughness.The effects of fiber content on the compressive and flexural strength were researched by adding fibers with different length-diameter ratio and elastic modulus in autoclaved aerated concrete.The microstructures were determined by X-ray diffraction and scanning electron microscopy analysis.The toughening mechanism of fibers on autoclaved aerated concrete was studied.The results show that the optimum content of polypropylene fiber and glass fiber is 0.3%.The compressive strength of the autoclaved aerated concrete increased by 22.0% and 27.8%, respectively and the flexural strength increased by 20.0%and 26.0%, respectively.The fibers have a certain effect on the hydration products content for the autoclaved aerated concrete, but new phases don't occur.A three-dimensional network skeleton in the matrix is formed when fibers are added in the autoclaved aerated concrete, which slow down or prevent the expansion of the crack by slowing the stress concentration at the crack tip.The main work is to overcome the resistance to pulling out the fibers for autoclaved aerated concrete, so the effect of fibers on the strength of the autoclaved aerated concrete is not related to the elastic modulus of fibers.关键词
砂加气混凝土/纤维/力学性能/微观结构Key words
autoclaved aerated concrete/fiber/mechanical property/microstructure分类
建筑与水利引用本文复制引用
杨磊,何廷树,盖国胜,何娟,陈畅..纤维特性对砂加气混凝土力学性能和微观结构的影响[J].硅酸盐通报,2018,37(6):1813-1817,5.基金项目
国家自然科学基金(51674184) （51674184）
陕西省工业科技攻关项目(2016GY-205) （2016GY-205）
