【摘要】 在地质聚合物合成过程中掺入秸秆,合成一种具有良好保温性能的材料——秸秆地质聚合物复合材料.环境稳定性是材料的重要指标,考察了该复合材料耐酸雨淋溶和抗氧化硫硫杆菌侵蚀性能.实验结果表明:秸秆地质聚合物复合材料在pH值为3以上的酸雨淋溶下,抗压强度维持在36MPa左右,扫描电镜显示其内部层状结构完好,耐酸雨淋溶性能良好.将复合材料浸泡在氧化硫硫杆菌的菌液中,21d抗压强度为26.30 MPa,28d抗压强度仍有18.40 MPa,傅里叶红外光谱和扫描电镜结果显示氧化硫硫杆菌虽然会对秸秆地质聚合物抗压强度产生一定影响,但其无定型三维网状硅铝酸盐结构依然存在.更多还原

【Abstract】 A straw-reinforced geopolymer composite, which had good thermal insulation performance,was synthesized by adding straw during the synthesis of geopolymer. The environmental stability is an important indicator for materials.The abilities of resisting acid rain and Thiobacillus thiooxidans for straw-geopolymer were studied. The straw-reinforced geopolymer maintained its compressive strength around 36 MPa when the pH of acid rain was over 3.The result of SEM showed that the micro structure of straw-reinforced geopolymer was intact.After being soaked in the bacterial fluid of Thiobacillus thiooxidans for 21 dand 28d,the compressive strength of straw-reinforced geopolymer was 26.30 and 18.40 MPa.The results of FT-IR and SEM showed that the erosion of Thiobacillus thiooxidans would have a certain influence on the compressive strength of straw-reinforced geopolymer.However,its amorphous three dimensional silico-aluminate structures still existed.更多还原