本文關鍵詞：高鋁煤矸石復合活化及其火山灰效應分析　出處：《建筑材料學報》2016年02期 　論文類型：期刊論文

  更多相關文章： 高鋁煤矸石 復合活化 強度活性指數(shù) 火山灰效應

【摘要】：采用膠砂強度法研究了機械粉磨、煅燒、增鈣煅燒及與化學活化劑復合對內蒙古某地高鋁煤矸石活性的激發(fā)效果,并采用SEM,XRD,FTIR分析了不同粉磨時間、不同煅燒溫度對高鋁煤矸石內部結構變化及其活化效果的影響;以強度活性指數(shù)、火山灰效應貢獻率為考察指標,分析了不同方式活化的高鋁煤矸石的火山灰效應.結果表明:單純機械粉磨對高鋁煤矸石的活性有一定的激發(fā)作用,但活化效果有限;煅燒對高鋁煤矸石活性有明顯的激發(fā)作用,其最佳煅燒溫度為800℃,此時高鋁煤矸石水泥膠砂強度活性指數(shù)達126.5%,火山灰效應貢獻率達44.7%;增鈣煅燒可使其強度活性指數(shù)進一步提高到142.6%,火山灰效應貢獻率提高到50.9%;在增鈣煅燒基礎上摻入0.6%(質量分數(shù))的硫酸鈉可使其28d抗壓強度達到78.9MPa,強度活性指數(shù)達到157.0%,火山灰效應貢獻率達到55.5%.
[Abstract]:Study on the mechanical grinding, calcination, calcination with calcium and activation effect and chemical activator compound in Inner Mongolia province high aluminum coal gangue activity by mortar strength method, and using SEM, XRD, FTIR analysis of different grinding time and different calcination temperature on the internal structure of high aluminum coal gangue changes and the effect of activation on; the strength activity index, volcano ash effect contribution rate as the study index, analyzes the effect of different ways of activated volcano ash high aluminum coal gangue. The results showed that has some stimulating effect on the activity of simple mechanical grinding of high aluminum coal gangue, but the activation effect is limited; calcination were induced obviously on the high aluminum coal gangue activity the best, the calcination temperature is 800 DEG C, the high aluminum coal gangue cement mortar strength activity index was 126.5%, the contribution rate of 44.7% volcano ash effect; calcination with calcium to further improve the strength activity index To 142.6%, the contribution rate of pozzolanic effect increased to 50.9%. On the basis of calcium calcination, 0.6% (mass fraction) of sodium sulfate could be added to 28d, the compressive strength of 78.9MPa reached 157%, and the contribution rate of pozzolanic effect reached 55.5%..
【作者單位】： 北方工業(yè)大學土木工程學院;固廢資源化利用與節(jié)能建材國家重點實驗室;武漢理工大學材料科學與工程學院;中冶建筑研究總院有限公司;
【基金】：北京市自然科學基金資助項目(2142013) 北京市教委科技發(fā)展計劃資助項目(KM201210009010) 固廢資源化利用與節(jié)能建材國家重點實驗室開放基金資助項目(SWR-2012-003)
【分類號】：TD849.5
【正文快照】： 4.中冶建筑研究總院有限公司,北京100088)煤矸石是中國年排放量和累計堆存量最大的工業(yè)廢棄物之一[1].截至2012年底,中國煤矸石堆存量約為50億t,其中,高鋁煤矸石(high alumina coalgangue,HACG)的堆存量至少在5億t以上,年排放量達1.2億t[2].然而,2011年煤矸石的利用率僅62%[3]，

本文編號：1344989