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首页> 外文会议>International Conference on Condensed Matters and Advanced Materials >The Low Concentration of Sodium Hydroxide Influence on The Compressive Strength of Fly Ash/Natural Kaolin-Based Geopolymer
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The Low Concentration of Sodium Hydroxide Influence on The Compressive Strength of Fly Ash/Natural Kaolin-Based Geopolymer

机译：氢氧化钠浓度对粉煤灰/天然高岭土地质聚合物抗压强度的影响

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Fly ash/natural kaolin-based geopolymer with a low concentration of NaOH has been studied. The fly ash was taken from coal combustion waste of Asam-asam power plant, meanwhile the kaolin clay was taken from Tatakan, South Kalimantan, Indonesia. The kaolin powder was calcined at 750 °C for 3 hours to form pozzolanic metakaolin (Al2O3 2SiO2). The silicon content from the X-ray fluorescence (XRF) test of the fly ash and the natural kaolin was respectively 44.58% and 72.98%. The aluminium weight percentage contained in the natural kaolin was roughly three times higher than that in the fly ash. Both starting materials together with the alkali solution (NaOH/Na2SiO3) were wisely mixed to produce geopolymers with Si/Al ratio of 4. The molarities of NaOH were controlled from 2M to 5M. The mixture was then heated at a curing temperature of 60 °C for 12 hours and dried at setting time of 14 to 28 days. The finest compressive strength, i.e. 91.6 MPa, was shown by the sample with 5M NaOH and 28 days setting time. This sample had a density of 2.04 g/ml and porosity of 5.88%. To the best of our knowledge, there is a prospective feature of using fly ash/natural kaolin-based geopolymer prepared by the low NaOH molarity in infrastmctural industries.
机译：已经研究了粉煤灰/天然高岭土的地质聚合物，具有低浓度的NaOH。粉煤灰取自Asam-ASAM发电厂的煤炭燃烧浪费，同时Kaolin粘土是由印度尼西亚南瓜南丹的Tatakan。高岭土粉末在750℃下煅烧3小时以形成Pozzolanic Metakaolin（Al2O3 2SiO 2）。粉煤灰和天然高岭土的X射线荧光（XRF）试验的硅含量分别为44.58％和72.98％。天然高岭土中含有的铝重量百分比大约比粉煤灰高的三倍。将起始材料与碱溶液（NaOH / Na2SiO3）一起明智地混合，以产生具有Si / Al比的缘聚合物.NaOH的摩擦是2m至5m。然后将混合物在60℃的固化温度下加热12小时，并在14至28天的设定时间下干燥。样品显示出优异的抗压强度，即91.6MPa，用5M NaOH和28天设定时间。该样品的密度为2.04g / ml，孔隙率为5.88％。据我们所知，有一种前瞻性的特征，可以使用射频摩尔在林克平产业中低NaoH摩尔制备的基于粉煤灰/天然高岭土的地质聚合物。

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