硅酸盐学报2017，Vol.45Issue(2)：182-189,8.DOI:10.14062/j.issn.0454-5648.2017.02.02
水泥石吸水吸油体积变形性能及其机理
Deformation Properties and Mechanism of Hardened Cement Pastes During Water/Oil Immersion
摘要
Abstract
Water/oil absorption and axial expanding strain of polymer modified hardened cement paste (MHCP) were investigated, and the relationship between the axial expanding strain and the saturated water/oil absorption was analyzed. The results show that the blank hardened cement paste (BHCP) absorbs more water than oil when fully saturated, implying that the finer pores are not filled with oil due to a lower affinity of oil to the capillary wall of BHCP. The massive water absorption at early stage does not lead to a significant volume expansion, while the less water absorption at later stage results in the noticeable volume expansion. For BHCP and MHCP, despite their comparable saturated water absorption, the water absorption speed of MHCP is lower than BHCP due to the blocking effect of the polymer film. Besides the pore volume, the presence of polymer film in MHCP leads to the more oil absorption. The expansion of MHCP upon water/oil absorption is larger than that of BHCP due to the refined pore structure by polymer film in MHCP. The permeability of cementitious materials can be quantitatively evaluatedvia experiments of water/oil absorption. In addition, the linear expansion of cementitious materials upon water/oil absorption can be quantitatively predicated using the equations established.关键词
水泥石/吸附/体积膨胀/水/油Key words
harden cement paste/absorption/swelling/water/oil分类
建筑与水利引用本文复制引用
杨瑞芳,孔祥明,卢子臣,王其春,曾敏,周仕明..水泥石吸水吸油体积变形性能及其机理[J].硅酸盐学报,2017,45(2):182-189,8.基金项目
国家自然科学基金(U1301241，U1262107)资助项目。 （U1301241，U1262107）
