新型固化剂加固成都粘土的矿物学研究  

STUDY ON MINERALOGY OF STABILIZED CHENGDU CLAY BY A NEW STABILIZER PREPARED IN LABORATORY

作　　者：徐冠立[1] 孙传敏[1] 孙遥[1] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《矿物岩石》2013年第4期1-6,共6页Mineralogy and Petrology

基　　金：财政部矿山保护专业基金(2007-244)

摘　　要：以一种实验室合成的新型固化材料为固化剂,加固成都粘土。用无侧限抗压强度测试、XRF、XRD、SEM等方法研究了成都粘土加固前后力学性质、矿物组成、土壤组构的变化。成都粘土中的主要粘土矿物为蒙脱石、伊利石和高岭石,非粘土矿物为石英和长石。加固后土壤中的自由水转化为结晶水,并生成了棒状钙矾石和蜂窝状、绒球状氢氧化铝凝胶,形成新的钙矾石-粘土矿物骨架结构。固化土无侧限抗压强度最高可达2.28MPa,实验证实新型固化材料对成都粘土有明显加固作用。Chengdu clay was stabilized by a new soil stabilizer prepared in laboratory. Its me- chanical properties, mineral composition and soil structure were revealed by unconfined compres- sive strength test,X-ray fluorescence and scanning electron microscope. The results show that the clay minerals in Chengdu clay were montmorillonite, llite and kaolinite, while non-clay minerals were quartz and feldspar. After stabilization, free water was converted to crystal water, and co- lumnar ettringite crystals and honeycomb or pompon-like aluminum hydroxide gels were genera- ted in the stabilized soil, forming new ettringite-clay minerals structure. The maximum unconfined compressive strength of Stabilized soil could up to 2.28 MPa. It was confirmed that Chengdu clay can be significantly reinforced by the new soil stabilizer.

关 键 词：成都粘土 土壤固化材料 矿物学 

分 类 号：P57[天文地球—矿物学]