The suitability of using precipitated silica(PS) from the burning of rice husk was investigated to improve the geotechnical engineering properties of a black cotton soil. A laboratory experimental program consisting o...The suitability of using precipitated silica(PS) from the burning of rice husk was investigated to improve the geotechnical engineering properties of a black cotton soil. A laboratory experimental program consisting of series of specific gravity, Atterberg limits, compaction, California bearing ratio(CBR), unconfined compression and consolidation tests was conducted on the untreated and PS treated soil samples. The application of PS to the soil significantly changed its properties by reducing its plasticity and making it more workable, improving its soaked strength, and increasing its permeability and the rate at which the soil gets consolidated. An optimal PS content of 50%, which provided the highest soaked strength, is recommended for the improvement of the subgrade characteristics of the BC soil for use as a pavement layer material.展开更多
以谷壳灰为原材料,通过微波辐射制取水玻璃,再以水玻璃为原料,采用沉淀法,微波干燥方式制备高分散性白炭黑。探讨了PEG用量、反应温度、微波干燥等方式对产品性能的影响。结果表明:在PEG的用量为水玻璃质量的1.2%、反应温度60℃、微波...以谷壳灰为原材料,通过微波辐射制取水玻璃,再以水玻璃为原料,采用沉淀法,微波干燥方式制备高分散性白炭黑。探讨了PEG用量、反应温度、微波干燥等方式对产品性能的影响。结果表明:在PEG的用量为水玻璃质量的1.2%、反应温度60℃、微波干燥条件下,制备的白炭黑吸油值(DBP)达3.00 m L/g以上,其氮吸附比表面为199m2/g。经电镜扫描证实所制备的高分散性白炭黑粒子具备较大孔隙特性,利于与橡胶牢固结合。展开更多
文摘The suitability of using precipitated silica(PS) from the burning of rice husk was investigated to improve the geotechnical engineering properties of a black cotton soil. A laboratory experimental program consisting of series of specific gravity, Atterberg limits, compaction, California bearing ratio(CBR), unconfined compression and consolidation tests was conducted on the untreated and PS treated soil samples. The application of PS to the soil significantly changed its properties by reducing its plasticity and making it more workable, improving its soaked strength, and increasing its permeability and the rate at which the soil gets consolidated. An optimal PS content of 50%, which provided the highest soaked strength, is recommended for the improvement of the subgrade characteristics of the BC soil for use as a pavement layer material.
文摘以谷壳灰为原材料,通过微波辐射制取水玻璃,再以水玻璃为原料,采用沉淀法,微波干燥方式制备高分散性白炭黑。探讨了PEG用量、反应温度、微波干燥等方式对产品性能的影响。结果表明:在PEG的用量为水玻璃质量的1.2%、反应温度60℃、微波干燥条件下,制备的白炭黑吸油值(DBP)达3.00 m L/g以上,其氮吸附比表面为199m2/g。经电镜扫描证实所制备的高分散性白炭黑粒子具备较大孔隙特性,利于与橡胶牢固结合。
