【摘 要】
:
The effects of the component gradient distribution at interface and the fiber gradient distribution on the strength of cement-based materials were studied.The r
论文部分内容阅读
The effects of the component gradient distribution at interface and the fiber gradient distribution on the strength of cement-based materials were studied.The results show that the flexural strength and compressive strength of the mortar and concrete with interface component and fiber gradient distributions are obviously improved.The strengthes of the fiber gradient distributed mortar and concrete (FGDM/C) are higher than those of fiber homogeneously distributed mortar and concrete (FHDM/C).To obtain the same strength,therefore,a smaller fiber volume content in FGDM/C is needed than that in FHDM/C.The results also show that the component gradient distribution of the concrete can be obtained by means of multi-layer vibrating formation.
其他文献
本文从目前的教学现状入手,分析了分层教学实施的必要性、意义,遵循的理论基础,以及具体的实施方案.
通过室内试验,初选并比较了两种改性混凝土的路用性能,研究发现,当按照合理的比例三掺适量的高效减水剂、硅粉和矿渣后,普通道路水泥混凝土的力学性能和耐久性能均有较大幅度
核能发电与其他能源发电相比,在资源、环境和经济性方面都有明显的优势,核电用的核燃料在很长一段时间内不会出现资源紧张的状况;核电是各种能源发电中对环境影响最小的发电
本文通过调研河源市突发环境事件应急管理体系现状,分析研究河源市突发环境事件应急管理水平和存在问题,汲取当前突发环境事件应急管理的经验和教训.根据河源市实际情况,探讨
通过实验室人工配水试验,考察了生物造拉流化床的徽生物群落分布和污染物去除特性.通过原水预曝气,可保持流化床底部进水溶解氧(DO)浓度达到8mg/L左右.在1mm/s的上升流速下,
据有关统计显示,近年来我国年灰霾频次呈现增加趋势,主要出现在经济发达和发展迅速的区域,尤其是一发达工业城市,灰霾天气已 经占到全年天数的一半或一半以上.灰霾这-气象灾
医疗机构的其他收支虽然在医疗机构总收支中所占的比例很小,然而也不应对其忽视,应规范医疗机构其他收支的核算管理。
Although other receipts and payments of medical in
本文以哈尔滨滨江道署协调控制区规划设计为契入点,探讨了遗址公园协调控制区的规划与保护措施
The glass-forming ability (GFA)of Nd70-xFe20Al10Yx and Nd60-xFe30Al10Yx (0≤ x≤15) alloys produced by Cu mold casting was investigated. Except Y=5 at. Pct, bul
信息时代和网络环境给传统写作教学模式带来了巨大的冲击,已经成为写作教学中不可回避的组成部分。这种新兴的教学模式有着传统教学无可比拟的优势,但也存在不少问题。本文就