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    题名 作者 年代 出处 被引量
1偏高岭土对水泥改性海相软土力学性能的影响显示文摘针对水泥土搅拌法处理连云港海相软土出现可溶盐对水泥土腐蚀而产生强度劣化问题,研究了掺入偏高岭土的水泥土抗腐蚀性能。试验结果表明:偏高岭土能促进水泥土的水化反应和火山灰反应,显著提高水泥土强度,并得到了水泥土的偏高岭土最佳掺入比。研究成果为水泥海相土力学性能改良理论及海相软土水泥土搅拌法加固设计提供依据。储诚富 李小春 邓永锋 唐俊玮 2013岩土工程学报2013,35,S1:17
2The Early Hydration and Strength Development of High-strength Precast Concrete with Cement/Metakaolin Systems显示文摘To study the relationship between material composition, curing conditions and strength development, the study simulated high-strength precast concrete pile production, and a high-strength mortar up to 90 MPa was designed and a hot-water pool was built for concrete curing. The major point of the study was to achieve a high early strength by using cement/metakaolin systems without autoclave curing with high-pressure steam. By means of XRD and thermal analysis, the progress of the hydration of the cement pastes blended with metakaolin was characterized. The main results indicate that high strength can be obtained at early age by the use of metakaolin and thermal treatment (hot-water curing). The improvement in strength of mortars with metakaolin can be explained by an increase in the amount of C-S-H and C-S-A-H hydrated phases and a decrease in the amount of calcium hydration(CH). Further more, a decrease in Ca/Si ratio of the matrix was observed from the results of EDX analysis, which also leaded to an improvement of the compressive strength. These results are of great importance for the high-strength precast concrete manufacturing industry.曾俊杰 2010Journal of Wuhan University of Technology(Materials Science)2010,25,4:10
3偏高岭土和硅灰影响砂浆干燥收缩的对比研究显示文摘采用偏高岭土、硅灰取代水泥制备砂浆,经不同预养护时间后测试砂浆干燥过程中的收缩和质量损失,对比分析偏高岭土和硅灰对砂浆干缩的影响。结果表明,偏高岭土和硅灰均减小了砂浆90d干缩,偏高岭土改善砂浆抗干缩性更优,延长预养护时间有利于提高偏高岭土和硅灰降低砂浆干缩的效果;在一定掺量范围内,随掺量上升,掺偏高岭土砂浆干缩不断变小,掺硅灰砂浆则先变小后变大;硅灰和偏高岭土砂浆中复掺粉煤灰能进一步改善砂浆抗干缩性,而复掺矿粉则不利于降低砂浆干缩。预养护3d的偏高岭土砂浆和硅灰砂浆质量损失在一定范围内与干缩呈线性关系,粉煤灰和矿粉的加入降低了线性拟合度;预养护14d的砂浆干燥质量损失与干缩线性关系良好。曾俊杰 范志宏 王胜年 2014武汉理工大学学报2014,36,6:9
4Influences of a New Admixture MX on Concrete Durability显示文摘The performance of concrete with a new admi xt ure MX was studied by using the freeze-thaw cycle, permeability and chemical at tack test. The experimental results show that MX improves the durability of conc re te. Within the optimum proportion ranges from 0.1%to 1%,the compressive strength of concrete after freeze-thaw is increased by 20%-50%,and Young’s modulus can be increased by 3.76-5.64 times.The strength and weight loss of concrete with 0.4%MX are respectively decreased by 28% and 60% after hydrochloric acid attack. The strength and weight loss of concrete with 0.4% MX are decreased by 5%-20% a fter sulfuric acid and sodium sulfate attack.The permeability of concrete with 1 % MX at 28 days can be decreased by more than 30%. The investigation of the nega tive temperature property of MX and analysis on concrete composition and microst ructure by MIP reveal that the heat conduction is resisted and the freezing proc edure of solution in concrete pore is retarded due to the adding of MX. Moreover ,the pore structure of concrete with MX is improved, thus improving the durabili ty. Based on this study, a resistance model of MX to block the heat and mass tra nsference was proposed, and the mechanism of durability improvement of concrete with MX was explained.马保国 2005Journal of Wuhan University of Technology(Materials Science)2005,20,1:0
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