| 天然水镁石纤维的化学松解技术 |
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| 引用本文： | 李连生,刘开平.天然水镁石纤维的化学松解技术[J].地球科学与环境学报,2007,29(1):47-49,65. |
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| 作者姓名： | 李连生 刘开平 |
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| 作者单位： | 长安大学,地球科学与国土资源学院,陕西,西安,710054 |
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| 基金项目： | 交通部交通应用基础研究基金 |
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| 摘 要： | 研究了不同表面活性剂对不同等级水镁石纤维的松解效果,通过对纤维悬浮液叩解度、粘度、纤维表面Zeta电位、纤维混凝土强度等的研究,并经扫描电镜分析,证明了化学松解工艺对水镁石纤维具有较好地劈分作用。表面活性剂种类及用量对纤维的叩解度、纤维的表面电位、悬浮液粘度均有影响,对不同等级纤维的影响有差异。随表面活性剂用量增加,纤维的叩解度、纤维表面的负电荷量、悬浮液的粘度一般均呈增加趋势。经过化学分散试验,水镁石纤维得到了较好松解,纤维直径由微米级下降至纳米级。将水镁石纤维应用于混凝土,抗折强度随纤维叩解度的增加而提高,说明纤维的化学分散有利于纤维对混凝土增强作用的发挥。
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| 关 键 词： | 水镁石纤维 化学松解 纤维混凝土 叩解度 Zeta电位 混凝土强度 |
| 文章编号： | 1672-6561（2007）01-0047-03 |
| 修稿时间： | 2006-03-17 |
Chemical Dispersion Technology of Natural Brucite Fibers |
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| LI Lian-sheng,LIU Kai-ping.Chemical Dispersion Technology of Natural Brucite Fibers[J].Journal of Earth Sciences and Environment,2007,29(1):47-49,65. |
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| Authors: | LI Lian-sheng LIU Kai-ping |
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| Abstract: | The dispersion effects of different surfactants on the two grades of brucite fibers were studied.After the tests of fiber beating degrees,the fiber surface Zeta potentials,the suspension viscosities,the concrete flexural strengths and the fiber SEM analysis,it is approved that the chemical dispersion process is effective to the split of brucite fibers.The fiber beating degrees,the surface charges and the suspension viscosities are influenced by the category and the dosage of the surfactants,though the influences are different on the two grades of brucite fibers.The fiber beating degrees,the surface charges and the suspension viscosities are raised with the increase of surfactant dosage.Through the chemical dispersion tests,the natural brucite fibers are split from micro-diameter to nano-diameter scale fibers.When it is used in the concrete reinforcement,the dispersed brucite fibers can play a better role in improving the concrete flexural strengths. |
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| Keywords: | brucite fibers chemical dispersion fiber-reinforced concrete beating degree Zeta potential concrete strength |
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