碱激发城市生活垃圾焚烧底灰和矿渣绿色胶凝材料性能研究

Strength analysis of alkali-activated cementitious materials prepared from municipal solid waste incineration bottom ash and granulated blast furnace slag

研究了城市生活垃圾焚烧底灰与粒化高炉矿渣制成的碱激发材料(AASL)抗压强度影响因素,通过改变粒化高炉矿渣掺量和Na_(2)O掺量对AASL进行抗压强度测试以及利用高分辨率扫描电子显微镜和能量色散X光能谱仪观察材料微观形貌,探索AASL抗压强度发展规律。试验结果表明粒化高炉矿渣掺量增加有利于底灰-矿渣碱激发材料抗压强度发展而Na_(2)O掺量的增加不一定导致试样抗压强度提高,掺有30%粒化高炉矿渣和Na_(2)O为5%时养护56 d抗压强度可达52.77 MPa。

The influence factors of compressive strength of alkali-activated materials made from municipal solid waste incineration bottom ash and granulated blast furnace slag(AASL)were studied.The compressive strength of AASL was tested by changing the content of granulated blast furnace slag and Na_(2)O,and the micro morphology of materials was observed by high resolution scanning electron microscope and energy dispersive X-ray spectrometer to explore the development law of compressive strength of AASL.Experimental results show that the increase of granulated blast furnace slag content is conducive to the development of compressive strength of alkali-activated material made from municipal solid waste incineration bottom ash and granulated blast furnace slag,while the increase of Na_(2)O content does not necessarily lead to the improvement of compressive strength of the sample.When 30%granulated blast furnace slag and 5%Na_(2)O are mixed,the compressive strength of the samples cured for 56 days can reach 52.77 MPa.