材料研究学报  2013, Vol. 27 Issue (6): 631-640

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磷石膏基材料的宏观性能与孔结构的关系*

候姣姣 梅甫定

(中国地质大学工程学院 武汉 430074)

Research on Relationship between Macroscopic Properties and Pore Sturcture of Phosphogypsum-based Material

HOU Jiaojiao** MEI Fuding

(Department of Engineering, China University of Geosciences, Wuhan 430074)

候姣姣,梅甫定. 磷石膏基材料的宏观性能与孔结构的关系*[J]. 材料研究学报, 2013, 27(6): 631-640.
. Research on Relationship between Macroscopic Properties and Pore Sturcture of Phosphogypsum-based Material[J]. Chinese Journal of Materials Research, 2013, 27(6): 631-640.

摘要 相关文章 Metrics 全文: PDF(2952 KB)   摘要: 用压汞法测量孔隙分布、孔隙率和体积、特征孔隙尺寸、孔隙比表面积, 描述了磷石膏基材料的连续相、分散增强相和分散劣化相在其空间内的多维渗流关系, 研究了这些参数对不同掺量下试件抗压强度的影响。结果表明, 磷石膏基材料在低含水量条件下水化不充分, 孔隙压力大, 易出现连通的大毛细孔和微裂纹, 导致强度降低; 各原料添加量的不同改变孔渗流作用, 导致磷石膏基材料在3-200 nm和200 nm-8 μm区间出现明显的孔隙分布峰; 试件的抗压强度与孔在三维空间出现渗流通路的临界点强度比随着水灰比的增加而降低, 且其比值与孔形状因子和体积分数大致符合幂律概率分布规律, 即 ; 本孔结构强度模型 拟合曲线表现出一定的相关性, 弥补了现有几种模型中不同孔结构范围预测值与实际值偏离较大的不足。 Abstract： The relationships of multidimensional seepage about continuous phase, dispersion strengthening phase and decentralized deterioration phase of the phosphogypsum-based material’s space were described. The porosity, pore size distribution (PSD), characteristic pore size and specific surface area (SSA) of the samples were measured by mercury intrusion porosimetery (MIP). The effect of these parameters above mentioned on the compressive strength of system I and system II was investigated. The results show that a lower hydration extent by the limited water supply and high capillary tension contributed to form the pore path precolation and low compressive strength. There are two PSD peaks in the pore size ranges of 3-200 nm and 200 nm-8 μm for all the samples. The pore-percolation changed by dosage of raw materials and specific strength reduce with increasing the water-cement ratio and the relationship among specific strength, shape factors and volume fraction follow roughly the power law, that is . This model, , exhibited certain superiorities in fitting the correlation and compensated for the perdiction about value and the actual value for different pore structure of several existing models.      ZTFLH:  分类号 TB321   基金资助:中国地质大学教学实验室开放基金SKJ2012140资助项目。 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 44.8K 链接本文: https://www.cjmr.org/CN/      或      https://www.cjmr.org/CN/Y2013/V27/I6/631 [1] 路来福,高芒来,杨森锋,谷 峥,刘月宁. 两性表面活性剂改性膨润土的制备及其对环丙沙星的吸附性能[J]. 材料研究学报, 2013, 27(6): 576-582. [2] 崔占奎, 米立伟, 法文君, 郑 直, 曾大文. Pt/BiOCl纳米结构的制备及其光催化性能*[J]. 材料研究学报, 2013, 27(6): 583-588. [3] 刘佳,倪文,于淼. 全尾砂废石骨料混凝土的制备和性能*[J]. 材料研究学报, 2013, 27(6): 615-621. Viewed Full text Abstract Cited   Shared      Discussed