为解决我国西北盐渍土地区混凝土结构存在的盐蚀问题,掺入矿物掺合料提高混凝土的耐腐蚀性。根据特定工程会对混凝土强度预先提出要求的实际情况,控制混凝土满足C35强度等级,设计单掺、双掺和三掺粉煤灰、矿渣粉及硅灰等6种配合比,采用...为解决我国西北盐渍土地区混凝土结构存在的盐蚀问题,掺入矿物掺合料提高混凝土的耐腐蚀性。根据特定工程会对混凝土强度预先提出要求的实际情况,控制混凝土满足C35强度等级,设计单掺、双掺和三掺粉煤灰、矿渣粉及硅灰等6种配合比,采用硫酸盐干湿循环侵蚀、SEM(Scanning Electron Microscope)和XRD(X-Ray Diffraction)等方法研究不同掺合料对混凝土抗硫酸盐侵蚀性能的影响,采用快速氯离子迁移系数和电通量法研究混凝土的抗氯离子渗透性能。结果表明:混凝土强度相同条件下,随着掺合料掺量增加,混凝土抗硫酸盐侵蚀和抗氯离子渗透能力都有提高,且粉煤灰的提高效果高于矿渣粉的提高效果。不同掺合料复掺可以改善混凝土的孔隙结构与水化产物结构,明显提高混凝土的抗硫酸盐侵蚀能力,进一步提高混凝土的耐腐蚀性。展开更多
Danshen, the dried root or rhizome of Salvia miltiorrhiza Bge., is a traditional and folk medicine in Asian countries, especially in China and Japan. In this review, we summarized the recent researches of Danshen in t...Danshen, the dried root or rhizome of Salvia miltiorrhiza Bge., is a traditional and folk medicine in Asian countries, especially in China and Japan. In this review, we summarized the recent researches of Danshen in traditional uses and preparations, chemical constituents, pharmacological activities and side effects. A total of 201 compounds from Danshen have been reported, including lipophilic diterpenoids, water-soluble phenolic acids, and other constituents, which have showed various pharmacological activities, such as anti-inflammation, anti-oxidation, anti-tumor, anti-atherogenesis, and anti-diabetes. This article intends to provide novel insight information for further development of Danshen, which could be of great value to its improvement of utilization.展开更多
文摘为解决我国西北盐渍土地区混凝土结构存在的盐蚀问题,掺入矿物掺合料提高混凝土的耐腐蚀性。根据特定工程会对混凝土强度预先提出要求的实际情况,控制混凝土满足C35强度等级,设计单掺、双掺和三掺粉煤灰、矿渣粉及硅灰等6种配合比,采用硫酸盐干湿循环侵蚀、SEM(Scanning Electron Microscope)和XRD(X-Ray Diffraction)等方法研究不同掺合料对混凝土抗硫酸盐侵蚀性能的影响,采用快速氯离子迁移系数和电通量法研究混凝土的抗氯离子渗透性能。结果表明:混凝土强度相同条件下,随着掺合料掺量增加,混凝土抗硫酸盐侵蚀和抗氯离子渗透能力都有提高,且粉煤灰的提高效果高于矿渣粉的提高效果。不同掺合料复掺可以改善混凝土的孔隙结构与水化产物结构,明显提高混凝土的抗硫酸盐侵蚀能力,进一步提高混凝土的耐腐蚀性。
基金supported by the National Natural Science Foundation of China(No.81430094)Beijing Nova Program(No.Z171100001117029)
文摘Danshen, the dried root or rhizome of Salvia miltiorrhiza Bge., is a traditional and folk medicine in Asian countries, especially in China and Japan. In this review, we summarized the recent researches of Danshen in traditional uses and preparations, chemical constituents, pharmacological activities and side effects. A total of 201 compounds from Danshen have been reported, including lipophilic diterpenoids, water-soluble phenolic acids, and other constituents, which have showed various pharmacological activities, such as anti-inflammation, anti-oxidation, anti-tumor, anti-atherogenesis, and anti-diabetes. This article intends to provide novel insight information for further development of Danshen, which could be of great value to its improvement of utilization.
