基于Rietveld/XRD(内标法)水泥浆体物相演变定量表征与晶定量公式非修正

基于Rietveld/XRD精修方法,借助GSAS-EXPGUI软件,研究既定水化龄期普通硅酸盐水泥浆体物相组成的定量表征,并结合Ca(OH)2的热分析定量结果以及熟料矿物与自由水的量化匹配关系研究Rietveld定量结果的可靠性。研究结果表明,干燥水化样品中Ca(OH)2的Rietveld定量结果与热分析定量结果具有较好的一致性,当水化1 d、3 d、7 d和28 d龄期时,其绝对误差分别为1. 2%、0. 7%、0. 3%和0. 8%,且随着水化龄期的延长,样品的相对误差显著降低。结合水泥浆体物相演变的Rietveld定量表征发现,熟料矿物的消耗程度与自由水的消耗程度存在较好的线性相关性(相关系数R2=0. 996),反映了其Rietveld定量表征具有较高的可靠性。在此过程中,提出了基于内标法改进型的非晶相定量公式,并建立了水泥浆体自由水与相应干燥样品化学结合水的数学关系。

含蜡原油管道化学防蜡剂研究进展

化学防蜡剂广泛应用于含蜡原油采输领域,为含蜡原油采输过程安全高效运行提供重要保障。目前已经开展了很多关于化学清蜡基础实验研究以及数值模拟研究,对化学防蜡剂的类型、作用机理及其应用范围进行了探究。常见的化学防蜡剂主要有稠环芳烃型防蜡剂、表面活性剂型防蜡剂、高分子聚合物降凝剂型防蜡剂以及新型纳米粒子防蜡剂,它们通常通过水膜理论或蜡晶改性理论防止蜡晶发生联合和沉积。其中,稠环芳烃型防蜡剂、表面活性剂型防蜡剂、高分子聚合物降凝剂型防蜡剂存在环境友好性差、环境适应性差或经济性差等缺点。今后的研究重点应该是探索绿色、高效且通用的化学防蜡剂,利用纳米粒子提高防蜡剂的性能,并且继续探索更加环保的化学防蜡剂。

Effect of Aggregate Gradation with Fuller Distribution on Properties of Sulphoaluminate Cement Concrete

Experimental investigations on mechanical property and durability of sulphoaluminate cement concrete with aggregate gradations according to Fuller distribution are presented in this paper. Compressive strength, water impermeability and resistance capability to sulfate attack of SACC have the same trend of concrete with fine aggregates of Fuller distribution gradation<concrete with coarse aggregates of Fuller distribution gradation<concrete with total aggregates of Fuller distribution gradation. The relationship between bulk density of aggregate and water penetration depth obeyed the second-order polynomial y=0.002x2-6.863 8x +5 862.3, and had a notable correlation R2=0.979 9. The sulphoaluminate cement concrete with total aggregate gradation with Fuller distribution for h=0.50 had the best resistance capability to sulfate attack. It was a second-order polynomial relationship between bulk density of aggregates and water penetration depth of y=0.002x2-6.863 8x+5 862.3 with R2=0.979 9, which indicated notable correlation. The fitting formula between bulk density of aggregates and sulfate resistance coefficient of SACC was y=0.000 5x+0.370 4 with R2=0.958 5.

Effect of Natural Zeolite on Performance of Sulfoaluminate Cement-based Planting Cementitious Material

This paper aimed to improve the water-retention performance and basic physical properties of sulfoaluminate cement（SAC）-based planting cementitious material. The effect of natural zeolite on the performance of SAC-based planting material was investigated. The water-retention performance, porosity, compressive strength, and alkalinity had been tested and TG-DSC analysis had been adopted in this paper. Experimental results showed that zeolite was effective to improve the water-retention capacity and 10%, 20% and 30% natural zeolite increased the pore volume of the hardened pastes by 10.6%, 26.0%, and 38.6%, especially pore size below 0.1 μm was increased by 9.7%, 26.2% and 17.5%. And 10% zeolite was beneficial to the compressive strengths of cementitious material and 1, 3, and 28 d compressive strength reached up to 35.9, 55.0, 80.3 MPa. Furthermore zeolite decreased the alkalinity of pore fluid of hardened cementitious material, while the addition of zeolite reached up to 30%, the alkalinity of pore fluid of hardened cementitious material decreased by 8.9%. Therefore zeolite was suitable for improving the performance of SAC-based planting cementitious material.

一戏一格 真幻瑰奇——边文彤舞美设计浅谈

作为舞美设计家,边文彤为观众带来了令人叹为观止的视觉震撼。边文彤追求“一戏一格”,对每一部戏都仔细揣摩,根据每一部戏的不同内容、主旨,在与导演充分沟通的基础上进行舞美设计。边文彤兼具创新性的现代思维和开放性的国际视野,形成了自己的鲜明特色。其作品呈现传统与现代、写实与写意、想象与显现、具象与意境、唯美与冷艳的独特面目。

深情礼赞莲花一样高洁的伟大女性——评国家京剧院的现代京剧《老阿姨》

由陈涌泉编剧,杨小青导演,王琳娜、靳智棋副导演,谢振强、卞晓晴唱腔作曲,韩光作曲配器,李金平打击乐设计,朱江指挥,戴延年舞美设计,李竟成灯光设计,胡天骥多媒体设计,王润菁、田磊、张兰、王珺、张琦等主演,国家京剧院创排的现代京剧《老阿姨》,于2024年6月14、15日在北京梅兰芳大剧院隆重上演。

一次精彩成功的艺术创造——评山东省京剧院的《大运河·南旺闸》

由刘桂成、刘野编剧,周龙导演,陈建忠、尹晓东、金亮、赵中华等作曲和唱腔设计,边文彤舞美设计指导,胡天骥多媒体设计,孙卫安、刘栋、杜鑫、吴雪靖、王铭、张钦顺、靳志永等主演的山东省京剧院新编京剧《大运河·南旺闸》,日前在济南市梨园大戏院隆重上演。这台以该院优秀中青年演员为主的倾情演出,得到了广大观众与戏曲专家的充分肯定。大运河作为世界文化遗产之一,在中国的历史上和人们的心目中,有着特别重要的地位和影响。