硅藻土基调湿建筑材料的制备与表征

关键字：硅藻土,基调,建筑材料,制备,表征

（1. 河南建筑职业技术学院，河南 郑州  450064；2.河南一建集团公司，河南 郑州  450014）
 

    摘要：以硅藻土、钾长石、黏土和滑石粉为原料，按一定比例湿混、压制，经高温烧结制备了性能优异的硅藻土基调湿材料。通过XRD和SEM分析了调湿材料的物相组成、微观形貌，并测试了其密度和抗压强度。在恒温可调湿度实验环境下测试了烧结温度对材料调湿性能的影响。研究表明：材料的调湿性能随着烧结温度的升高而降低，当烧结温度为900 ℃时，调湿材料的微观形貌以蜂窝网状结构为主，此时材料的调湿性能最佳；当烧结温度为1050 ℃时，调湿材料的密度为1.44  g/cm3，抗压强度为29.1 MPa。
    关键词：硅藻土；调湿性能；烧结；孔隙
    中图分类号：TU56+4.9        文献标识码：A        文章编号：1001-702X（2017）12-0086-03

Preparation and characterization of diatomite humidity-controlling building material
MA Mingming1，ZHANG Wei2
（1.Henan Technical College of Construction，Zhengzhou 450064，China；
2.Henan Construction First Engineering Group Cooperation，Zhengzhou 450014，China）

    Abstract：Diatomite humidity-controlling building material with excellent performance was successfully prepared by diatomite，potash feldspar，clay and talcum powder wet mixed and pressed proportionally under high temperature sintering process. The phase composition， microstructure，density and compressive strength of the material was characterized by X-ray diffraction（XRD） andscanning electron microscopy（SEM）. The effect of sintering temperature on the humidity-controlling property of the material was tested under adjustable humidity environment. The results show that the humidity-controlling property of the material decreases with the increase of sintering temperature. The material with honeycomb network structure possesses the best humidity-controlling property when the sintering temperature reaches 900 ℃. The density and compressive strength of the material are about 1.44 g/cm3 and 29.1 MPa when the sintering temperature is 1050 ℃.
    Key words：diatomite，humidity-controlling property，sintering，pore