| Popis: |
Wind erosion is one of the most familiar and serious diseases to Ancient Earthen Architectures (AEA). As far as the durability of AEA is concerned, most previous researches focus on laboratory test with little on field simulative test. In order to find out actual effect of PS (high mole ratio potassium silicate) in enhancing the durability of AEA under wind erosion, this paper combines laboratory test and field test. In the former part, we treated samples with PS of 7% and 10%, then carried out laboratory tests on water stability and compressive strength, as well as wind tunnel tests on wind erosion durability. In the latter part, we infiltrated the test region with PS of 3%、5% and 7%, and carried out wind erosion test on field. The results indicate that the compressive strength and water stability of PS-treated samples are obviously advanced. In the wind tunnel test, the critical wind speed of untreated and treated samples respectively are 12m/s and 20 m/s. In the field test, the durable time of being eroded increases and the failure depth of test region decreases along with the increase of PS concentration. The surface layer of W starts exfoliating in short time, the eroding styles of W3 and W5 are delves-little piece-large piece and delves-little piece, however, there are only several delves in the W7. Laboratory and field results indicate that the PS can to a large extent change the characters of soil, and the durability of AEA under wind erosion is enhanced along with the increase of PS concentration. |
