本文選題：黃河泥沙　切入點：活性指數(shù)　出處：《建筑材料學(xué)報》2017年02期 　論文類型：期刊論文

【摘要】：采用NaHSO_4來活化黃河泥沙,并通過X射線衍射(XRD)、紅外光譜(FTIR)和固相核磁共振(MAS-NMR)等方法,分析了NaHSO_4與黃河泥沙的作用機理.結(jié)果表明:在NaHSO_4作用下,黃河泥沙與水泥的反應(yīng)活性明顯提高,其28d抗壓強度、可塑性和軟化系數(shù)隨著NaHSO_4質(zhì)量分數(shù)的增加而提高;當NaHSO_4質(zhì)量分數(shù)為6%時,活化黃河泥沙的活性指數(shù)達到0.64,軟化系數(shù)為0.36.FTIR,XRD和MAS-NMR的分析結(jié)果顯示,在NaHSO_4作用下,黃河泥沙中長石的Si—O—Al基團鍵角發(fā)生偏移,四面體網(wǎng)絡(luò)結(jié)構(gòu)聚合度下降而活性增加,從而改善了其工程特性.
[Abstract]:The interaction mechanism between NaHSO_4 and Yellow River sediment was analyzed by means of X-ray diffraction (XRD), FTIR (FTIR) and solid phase magnetic resonance spectroscopy (MAS-NMRs). The results show that: under the action of NaHSO_4, the mechanism of interaction between NaHSO_4 and sediment of the Yellow River is analyzed by using NaHSO_4 to activate the sediment of the Yellow River. The reaction activity of Yellow River sediment with cement is obviously increased, and its 28d compressive strength, plasticity and softening coefficient increase with the increase of NaHSO_4 mass fraction, and when the NaHSO_4 mass fraction is 6, The activity index of activated Yellow River sediment is 0.64, and the softening coefficient is 0.36 FTIR XRD and MAS-NMR. The results show that under the action of NaHSO_4, the Si-O-Al bond angle of feldspar in Yellow River sediment shifts, while the polymerization degree of tetrahedron network decreases and the activity increases. Thus, the engineering characteristics are improved.
【作者單位】： 中原工學(xué)院建筑工程學(xué)院;河南建筑材料研究設(shè)計院有限責任公司;天津城建大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：“十二五”國家科技支撐計劃項目(2014BAL03B03)
【分類號】：TV14

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