Four mineral admixture concrete specimens werefabricated to study the negative effect improvements ofaccelerated curing on the chloride penetration resistance ofordinary concrete. After reaching different initial stre...Four mineral admixture concrete specimens werefabricated to study the negative effect improvements ofaccelerated curing on the chloride penetration resistance ofordinary concrete. After reaching different initial strengths, the specimens were placed in 40, 60, or 80 t water tanks foraccelerated curing. The Coulomb values of the specimens weemeasured with ASTM C1202 experiment at 28, 100, 200, ad300 d. Partial specimens were also selected for rapid chlorideion migration coefficient and mercury intrusion porosimetryexperiments. The experimental results show that theaccelerated curing for ordinary concrete linealy deterioratesthe chloride penetration resistance, whereas the incorporationof mineral admixtures improves the concrete microscopic pore-structures and negative effects. An upper temperature limit of60 t of the accelerated curing is suitable for obtainingsuperior chloride penetration resistance for the mineraladmixture concrete. Pre-curing at a normal temperature of 20t is beneficial for improving the negative effect, which isalso aieviated with increasing testing age as a result of thesuccessive hydration of binder materials in concrete.展开更多
目的分析血必净与胸腺肽联合治疗重症肺炎的效果。方法选取100例重症肺炎患者为研究对象,随机分组分为观察组与对照组,每组50例,观察组给予胸腺肽+血必净联合治疗,对照组给予单纯胸腺肽治疗。结果观察组患者治疗有效率为96.0%,明显高于...目的分析血必净与胸腺肽联合治疗重症肺炎的效果。方法选取100例重症肺炎患者为研究对象,随机分组分为观察组与对照组,每组50例,观察组给予胸腺肽+血必净联合治疗,对照组给予单纯胸腺肽治疗。结果观察组患者治疗有效率为96.0%,明显高于对照组(86.0%,P<0.05);治疗后观察组患者白细胞计数和C-反应蛋白水平分别为(8.16±3.02)×109/L、(31.60±9.55)mg/L,对照组分别为(9.28±3.05)×109/L(37.79±10.87)mg/L,差异有统计学意义(P<0.05);治疗后观察组患者氧分压明显高于对照组,二氧化碳分压、心率低于对照组(P<0.05);治疗后观察组患者血管通透水平为(0.52±0.02)g/L,明显低于对照组的(0.58±0.01)g/L(P<0.05);观察组患者肺部顺应能力为(209.78±21.44)ml/cm H2O(1 cm H2O=0.098 k Pa),对照组为(201.57±20.58)ml/cm H2O,两组比较差异有统计学意义(P<0.05)。结论应用胸腺肽+血必净联合治疗重症肺炎效果明显,值得临床推广使用。展开更多
基金The National Natural Science Foundation of China(No.51178455)the Transformation Program of Science and Technology Achievements of Jiangsu Province(No.BA2015133)
文摘Four mineral admixture concrete specimens werefabricated to study the negative effect improvements ofaccelerated curing on the chloride penetration resistance ofordinary concrete. After reaching different initial strengths, the specimens were placed in 40, 60, or 80 t water tanks foraccelerated curing. The Coulomb values of the specimens weemeasured with ASTM C1202 experiment at 28, 100, 200, ad300 d. Partial specimens were also selected for rapid chlorideion migration coefficient and mercury intrusion porosimetryexperiments. The experimental results show that theaccelerated curing for ordinary concrete linealy deterioratesthe chloride penetration resistance, whereas the incorporationof mineral admixtures improves the concrete microscopic pore-structures and negative effects. An upper temperature limit of60 t of the accelerated curing is suitable for obtainingsuperior chloride penetration resistance for the mineraladmixture concrete. Pre-curing at a normal temperature of 20t is beneficial for improving the negative effect, which isalso aieviated with increasing testing age as a result of thesuccessive hydration of binder materials in concrete.
文摘目的分析血必净与胸腺肽联合治疗重症肺炎的效果。方法选取100例重症肺炎患者为研究对象,随机分组分为观察组与对照组,每组50例,观察组给予胸腺肽+血必净联合治疗,对照组给予单纯胸腺肽治疗。结果观察组患者治疗有效率为96.0%,明显高于对照组(86.0%,P<0.05);治疗后观察组患者白细胞计数和C-反应蛋白水平分别为(8.16±3.02)×109/L、(31.60±9.55)mg/L,对照组分别为(9.28±3.05)×109/L(37.79±10.87)mg/L,差异有统计学意义(P<0.05);治疗后观察组患者氧分压明显高于对照组,二氧化碳分压、心率低于对照组(P<0.05);治疗后观察组患者血管通透水平为(0.52±0.02)g/L,明显低于对照组的(0.58±0.01)g/L(P<0.05);观察组患者肺部顺应能力为(209.78±21.44)ml/cm H2O(1 cm H2O=0.098 k Pa),对照组为(201.57±20.58)ml/cm H2O,两组比较差异有统计学意义(P<0.05)。结论应用胸腺肽+血必净联合治疗重症肺炎效果明显,值得临床推广使用。
