纤维增强型蒸压加气混凝土砌块力学性能研究

Study on mechanical properties of the fiber reinforced autoclaved aerated concrete block

在其他原料配合比不变的条件下,研究掺玉米秸秆纤维及玻璃纤维蒸压加气混凝土砌块的抗压及劈裂抗拉力学性能,借用扫描电镜(SEM)手段从微观层面分析纤维对基体的作用。试验结果表明:掺入0.2%和0.5%的玉米秸秆纤维对蒸压加气混凝土砌块的抗压强度没有显著影响,对劈裂抗拉强度分别提高7.4%及18.5%;掺0.2%和0.5%玻璃纤维的蒸压加气混凝土砌块抗压强度分别提高6.0%及22.0%,劈裂抗拉强度分别提高14.8%及33.3%;纤维在基体里形成的网络状增强受力体系及纤维-基体界面是纤维影响基体作用的主要原因。

Under the condition of other raw material mixing ratio is constant, study of mixed corn straw fiber and glass fiber autoclaved aerated concrete compressive strength and splitting tensile properties.Using scanning electron microscopy（SEM） analysis from the micro level effect of fiber to matrix.The test results show that： corn stalk fiber blended with 0.2%and 0.5%had no significant effect on the compressive strength of autoclaved aerated concrete block, but the splitting tensile strength increased by 7.4%and 18.5%respectively ; Ad- dition of 0.2%and 0.5%glass fibre compressive strength of aerated autoclaved concrete block is increased by 6%and 22%respectively, and the splitting tensile strength increased by 14.8%and 33.3%respectively;Many reticular fibers in the matrix enhancing mechanical system as well as the formation of fiber - matrix interface is the main reason for the substrate effect on the micro level.