煤系偏高岭土固化赤泥的强度试验研究
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摘要
通过煤系偏高岭土固化赤泥,实现对赤泥的处理,达到以废治废的目的。通过对7 d、14 d、21 d、28 d、60 d、90 d共6个龄期下,6种不同煤系偏高岭土掺量的煤系偏高岭土固化赤泥复合体(RM-CMK复合体)抗压强度的测试,探究了煤系偏高岭土掺量和龄期对RM-CMK复合体强度的影响。研究表明:RM-CMK复合体的抗压强度随煤系偏高岭土掺量和龄期的增大而提高,基本符合线性关系。采用高斯-马尔科夫线性模型建立RM-CMK复合体抗压强度二元预测模型,建立RM-CMK复合体的抗压强度与龄期、煤系偏高岭土掺量两个因素的相关关系,实测值与预测值误差在5%左右。
Through the test of the compressive strength of the coal metakaolin-solidified red mud complex(hereinafter referred to as RM-CMK complex) with 6 different coal metakaolin at 7 d, 14 d, 21 d, 28 d, 60 d, 90 d. The effects of coal metakaolin content and age on the strength of RM-CMK complex were investigated. The research shows that the compressive strength of RM-CMK complex increases with the increase of coal kaolin content and age. The Gauss-Markov linear model is used to establish the binary prediction model of compressive strength of RM-CMK complex. The relationship between the compressive strength of the RM-CMK complex and the age of the coal and the metakaolin content of the coal system was established. The error between the measured value and the predicted value was about 5%.
Through the test of the compressive strength of the coal metakaolin-solidified red mud complex(hereinafter referred to as RM-CMK complex) with 6 different coal metakaolin at 7 d, 14 d, 21 d, 28 d, 60 d, 90 d. The effects of coal metakaolin content and age on the strength of RM-CMK complex were investigated. The research shows that the compressive strength of RM-CMK complex increases with the increase of coal kaolin content and age. The Gauss-Markov linear model is used to establish the binary prediction model of compressive strength of RM-CMK complex. The relationship between the compressive strength of the RM-CMK complex and the age of the coal and the metakaolin content of the coal system was established. The error between the measured value and the predicted value was about 5%.
引文
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[2]孔德顺.煤系高岭土及其应用研究进展[J].化工技术与开发,2014,43(7):39-41.
[3]张金山,孙春宝,曹钊,等.煤系高岭岩制备偏高岭土实验研究[J].无机盐工业,2016,48(9):64-67.
[4]WANG H,LI H,YAN F.Synthesis and mechanical properties of metakaolinnite-based geopolymers[J].Colloids&Surfaces APhysicochemical&Engineering Aspects,2005,268(1):1-6.
[5]南相莉,张廷安,刘燕,等.我国赤泥综合利用分析[J].过程工程学报,2010(S1):23-28.
[6]黄凤凤,米栋云,李奇烜,等.赤泥水泥固化土的强度和电阻率特性[J].中国科技论文,2016,11(13):1474-1477.
[7]梁媛,陈均宁.赤泥的危害及综合利用[J].大众科技,2014,16(7):33-34.
[8]SGLAVO V M,MAURINA S,CONCI A,et al.Bauxite‘red mud’in the ceramic industry.Part 2:production of clay-based ceramics[J].Journal of the European Ceramic Society,2000,20(3):245-252.
[9]刘时光,付毅,冷杰彬,等.拜耳法赤泥固化性能研究[J].有色金属,2001(3):29-31
[10]NEVIN Y,VAHDETTIN S.Utilization of bauxite waste in ceramic glazes[J].Ceramics International,2000,26(5):485-493.
[11]刘剑平,武涛,郝羽婷,等.Na2SO4环境下CMK-水泥土强度机理的研究[J].非金属矿,2018,41(5):7-10.
[12]温永钦,申向东,赫文秀.水泥复合土的强度预测模型[J].内蒙古农业大学学报(自然科学版),2015(3):106-110.
[13]周长林.水泥固化镉(Cd)污染土工程特性研究[D].重庆:重庆大学,2017.