欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用沸煮法,研究了饱和石灰水和不同浓度NaOH溶液对砒砂岩中SiO2、Al2O3溶出量的影响,通过胶砂强度试验对砒砂岩活性进行了探讨,并以碱溶液浓度、养护方式和养护龄期为变量,通过强度测试、X射线衍射、Fourier红外光谱（FTIR）和扫描电子显微镜（SEM）等手段,对砒砂岩改性材料的力学性能、产物类型和微观结构进行了研究,探讨了将砒砂岩改性为碱激发材料的可行性。结果表明：砒砂岩具有一定的火山灰活性,碱浓度对砒砂岩中SiO2、Al2O3溶出量有显著影响,碱浓度越高,SiO2、Al2O3溶出量越大,对碱浓度为2mol/L的NaOH溶液,白色、红色砒砂岩的SiO2、Al2O3溶出率分别可达31.7%和32.93%;碱溶液浓度、养护温度、养护龄期对改性材料的抗压强度有显著影响,相对砒砂岩原岩,改性材料的抗压强度和耐水性均有较大提高,90d龄期试件抗压强度最高达11.63MPa。FTIR和SEM-EDS结果表明,改性材料的反应产物主要为无定型水化硅酸钙类胶凝物质。
英文摘要：
The influence of NaOH concentration on the soluble boiling reflux mothed. The relationship between the mechanical contents of SiO2 and Al2O3 in pisha sandstone was investigated by a strength of motar and pisha sandstone activity was discussed. In order to investigate the feasibility of producing an alkali-activated material with pisha sandstone via an alkali activation process, the mechanical strength, the types of hydration products and microstructure of pisha sandstone modified materials at different NaOH concentrations, curing conditions and curing ages were analyzed by an electronic universal testing machine, X-ray diffractometer, Fourier transform infrared spectroscope （FTIR） and scanning electron microscope （SEM） , respectively. The results show that the soluble contents of SiO2 and A1203 increase and pisha sandstone has a activity when the NaOH concentration increases, and for white and red pisha sandstone, the soluble contents of SiO2 and A1203 are 31.7% and 32.93%, respectively, when the NaOH concentration is 2 mol/L. The mechanical properties of alkali-activated pisha sandstone materials can be affected by the curing temperature, alkaline concentration and curing age. The maximum compressive strength of specimens is 11.63 MPa. Compared to pisha sandstone, the compressive strength and water resistance of the pisha sandstone modified materials were enhanced. The main hydration reaction product of pisha sandstone modified materials is an amorphous C-S-H gel.
同期刊论文项目
同项目期刊论文
期刊信息
位置：