杀白蚁剂对水泥基材料强度与微观结构的影响

Effect of Termiticides on Strength and Microstructure of Cement-Based Materials

采用扫描电镜、X射线衍射技术研究了三种杀白蚁剂对水泥基材料的水化产物及其微观结构的影响,并结合掺杀白蚁剂水泥基材料的强度,探究两者之间的内在联系。结果表明:杀白蚁剂的掺入会降低水泥基材料的强度,且随着杀白蚁剂浓度的提高,强度会逐渐降低。各试验组的主要水化产物均为Ca(OH)2和CaCO 3,掺入杀白蚁剂并不会产生新的水化产物。与此同时,掺入较高浓度杀白蚁剂时,有利于促进水泥基材料的早期水化。相比于联苯菊酯和毒死蜱杀白蚁剂,吡虫啉杀白蚁剂对水泥基材料的影响更为严重。

The effects of three termiticides on the hydration products and microstructure of cement-based materials were studied by scanning electron microscopy and X-ray diffraction.And combining the strength of cement-based materials with termiticides to explore the intrinsic relationship between the two.The results show that the incorporation of termiticides will reduce the strength of cement-based materials,and the strength will gradually decrease with the increase of termiticides concentration.The main hydration products of each test group are Ca(OH)2 and CaCO 3,and the incorporation of termiticides does not produce new hydration products.At the same time,the incorporation of higher concentrations of termiticide is beneficial to promote the early hydration of cement-based materials.Compared with bifenthrin and chlorpyrifos termiticide,the effect of imidacloprid termiticide on cement-based materials is more serious.