| 梁止水,吴智仁,杨才千,姚文艺,冷元宝.基于W-OH的砒砂岩抗蚀促生机理研究[J].水利学报,2016,47(9):1160-1166 |
| 基于W-OH的砒砂岩抗蚀促生机理研究 |
| Mechanism of erosion resistance and vegetation promotion by W-OH in Pisha sandstone |
| 投稿时间：2015-10-20 |
| DOI：10.13243/j.cnki.slxb.20151100 |
| 中文关键词: 砒砂岩 W-OH复合材料 抗侵蚀机理 促生机理 |
| 英文关键词: Pisha sandstone W-OH composite material mechanism of erosion resistance vegetation promotion |
| 基金项目:国家十二五科技支撑计划项目（2013BAC05B02）；江苏省普通高校学术学位研究生创新计划项目（KYLX15_0083） |
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| 中文摘要: |
| 砒砂岩区是黄河中游粗沙的主要来源区之一，而化学-植物措施对保护砒砂岩免受降雨和风力侵蚀具有较为明显的效果。从砒砂岩侵蚀机理、表面浸润性、抗蚀性、微观结构、红外光谱、保水性和植生等方面研究了一种新型亲水性聚氨酯复合材料（W-OH）对砒砂岩的抗侵蚀和促生机理。结果表明，砒砂岩易受侵蚀主要是组成和内部结构造成的，而W-OH溶液能够包裹在砒砂岩表面，形成一层具有保护作用的固结层，且可以很好地渗透入砒砂岩颗粒内部，增加颗粒间的黏结性，从而可以防止砒砂岩的进一步侵蚀。另外，W-OH为高分子材料，与水迅速反应可以形成网状的弹性凝胶体。该凝胶体具有保水保肥的作用，可以反复缓慢吸收和释放水分为植物生长所需，延长植物的生长期，起到促生的效果，从而为砒砂岩区综合治理提供理论依据。 |
| 英文摘要: |
| Pisha sandstone area is one of the main coarse source areas in the middle reach of the Yellow River,while Chemical-Vegetation measures have a significant effect on protecting Pisha sandstone from rainfall and wind. Based on the experimental study of Pisha sandstone erosion mechanism, surface wettability, corrosion resistance, microstructure, Infrared spectrum (IR), water retention and plant raw, mechanism of erosion resistance and vegetation promotion by a kind of novel hydrophilic polyurethane (W-OH) used in solidifying Pisha sandstone was studied. The results show that the reason why Pisha sandstone susceptible to erosion is mainly due to its compositions and internal structure. However, when certain concentration of W-OH solution is sprayed on the weathering Pisha sandstone surface, it would penetrate into Pisha sandstone particles quickly and wrap them well, and then a certain consolidation layer is formed. As a result, the adhesion force between particles is increased and further erosion would be prevented. Moreover, as a hydrophilic polymer material, W-OH could react with water to form an elastic gel with network. The elastic gel has the effect of water and fertilizer retention, and it could slowly absorb and release water repeatedly in several times to provide the water for vegetation growth and to extend its growth period in dry or semidry areas. Therefore, these all would provide a references and supports in controlling Pisha sandstone area comprehensively. |
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