粉煤灰综合利用 2013 NO.6 FLYASHCOMPREHENSIVEUTILIZATION 试验与应用 粉煤灰合成沸石对混合重金属离子的吸附研究* Adsorption of Mixed Heavy Metal Ions by Zeolite Synthesized from Coal Fly Ash 陈晨',程婷2 (1.江苏科技大学生物与化学工程学院,江苏镇江212018; 2.江苏城市职业学院城市科学系,江苏南京210017) 摘要:利用粉煤灰合成沸石吸附混合重金属离子Cu²、Ni²"、Pb”、Zn”,考察初始浓度对沸石吸附4种混合重金属 离子的吸附效果影响。
关键词:粉煤灰;重金属;沸石;竞争吸附 中图分类号:XTQ649.4"5文献标识码:A文章编号:1005-8249(2013)06-0020-04 Chen Chen', Cheng Ting² (1.SchoolfBiologyandChemicalEngineeing,JingsuUiversityfScience andTechnologyZhenjang 08 2. Department of City Science, Jiangsu City Vocational College, Nanjing 210017 ) Abstract:The experiment was conductedt examine the adsorption of mixe heay metals Cu², Ni² , Pb² and Zn² throughsymthesiing zeolite from col fyash The initial cnentration was investigated to study th adsorption effct of mix heavy metal ioThe results showed that, theinitial cntatinadsignificntftthdsptiftfheaymetalheremalratfmie hevymetalsbysynthti lite was diffeent from the initial oncentration.When the initial ncentration was 50 mg/Land 100mg/L, the adsorption sequence of heavy metals was Cu>Pb>Ni>Zn. But when the initial concentration was 200 mg/L and 300 mg/L, the adsorption sequence bee Cu Pb>Zn>Ni. In addi- tion, the adsorption ability of Pb² and Cu²* by synthetic zeolite was greater than Zn²* and Ni2* Key words:coal fly ash; heavy metal; zeolite; adsorption 近年来随着工业排污量的急剧增加,大量重金属备受关注。
粉煤灰综合利用 2018N.2 FLY ASH COMPREHENSIVE UTILIZATION 墙材革新 粉煤灰加气混凝土砌块应用于高层填充墙 Study on the Application of Fly Ash Aerated Concrete Block in the High Filled Wall 李华1,郑成伍2 (1.黄淮学院,河南驻马店463000;2.驻马店市交通工程质量监督站,河南驻马店463000) 摘要:结合高层建筑多使用框架结构、墙体自重轻、施工周期长等特点,通过试验比对,粉煤灰加气混凝土砌 块优于其他材料应用于高层建筑。 关键词:高层建筑;粉煤灰;混凝土;砌块 中图分类号:TB302 文献标识码:A 文章编号:1005-8249(2018)02-0084-04 Li hua' ,Zheng Chengwu ( 1.Huanghuai University ,Henan Zhumadian 463000 ,China ; 2 .Zhumadian ,Traffic Engineering Quality Suoervision Station ,Henan Zhumadian 463000 ,China ) Abstract :Combined with features like frame structure ,wall light weight and long construction period ,through the experimental parison ,fly acrated concrete block is better than other materials applied in high-rise buildings . Keywords :tall building ;fly ash ;conerete ;block 粉煤灰加气混凝土砌块是利用工业废料制成的 和可加工等优点,是一种新型的节能墙体材料,可以 新型墙体材料,将粉煤灰、治金废渣及尾矿等工业 替代空心砌块及墙板作为承重墙体材料使用,隔热保 固体废物再生利用,真正实现经济循环,促进经济和 温是粉煤灰的最大优势,保温效果是普通黏土砖的4 环境和谐发展。它轻质、高强、具有良好的保温、隔热、 倍,可节约电耗30%~50% 吸声性能,作为高层建筑墙体的填充材料,既解决 对粉煤灰加气混凝土砌块材料的物理性能、力 了建筑物的使用寿命低,又解决建筑物的安全问题, 学性能、收缩性能、施工性能和砌块的抗压强度、抗 且能满足建筑节能65%以上,推广使用后可以大大 剪强度、弯曲抗拉强度以及门窗上部节点等地方进 改善居民的生活质量;与传统黏土烧结砖墙体材料 行了研究。粉煤灰加气混凝土砌块施工时控制不好 相比,具有节土、自重轻、施工方便、节省砂浆...
施工技术 2012年7月上 46 CONSTRUCTION TECHNOLOGY 第41卷第368期 筒中筒深电梯井基础施工技术 徐华荣,吴军,龚文峰,夏于宝,赵济生 (江苏中兴建设有限公司西南分公司,重庆400020) [摘要]简中简深电梯井基础具有基坑深、面积大、结构复杂、施工工序多等特点.针对筒中简深电梯井基础施工 的特殊性和复杂性,重点介绍了施工方案的选择,施工工艺流程,施工缝的设置以及内外简体的交叉作业施工等内 容.工程实践表明,采取的技术措施行之有效,深电梯井至今未发现涂漏现象,工程质量得到保证. [关键词]基础:电梯并:筒中筒结构:施工缝 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2012)13-0046-02 Construction Technology for the Foundation of Double-tube Deep Elevator Shaft Xu Huarong Wu Jun Gong Wenfeng Xia Yubao Zhao Jisheng Jiangsu Zhongxing Conatruction Co.Ld.The Southwest Company Chongging 400020 China) Abstract:The construction of double-tube deep elevator shaft foundation was characterized by deep excavation extensive area plex structure and excessive construction processes.Considering these characteristics this paper introduced the choice of construction scheme construction process setting of construction joint and crossed construction of the inner and outer tube.Engineering practice shows that the method adopted was very effective.No leakage has been observed in the deep elevator shaft which means the construction quality was successfully maintained. Key words:foundations;elevator shaft;tube in tube structure;construction joint 1工程概况 昆明市俊发七彩俊园项目工程,总建筑面积22@100 -9.400 -9400 22a100 47万m2 地下2层,地上有11栋高层建筑,其中3 20100 号和4号楼为办公楼,建筑面积均为4.1万m2 25 层框筒结构,总建筑高度106.4m 8度抗震设防. 010012009 00180c8 20@1001500 2100 220100 -13900 00 基础为桩筏基础,电梯井为筒中筒深基础,电梯基 础面积为302m2 深度从地下室地坪向下6.1- 20@100 6.9m 设有9个电梯井.电梯坑基础厚1.6m 外筒 2900 14300 4300 体墙厚1.0~2.4m 高度为2.5~3.3...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2018N0.2 试验与应用 等强度条件下矿物掺合料对混凝土热学性能的影响 Effect of Mineral Admixtures on Thermal Properties of Concrete under Constant Intensity 易鹏,李晓庆,杨升 (新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052) 摘要:在等强度(C45、C60)条件下,分别利用了水化热测定仪和混凝土绝热温升双曲线表达式研究了矿物掺 合料对混凝土中胶凝材料水化热及对混凝土绝热温升的影响,研究结果表明:掺入大掺量的矿物掺合料可以有效的降 低混凝土中胶凝材料的水化热和混凝土的绝热温升,从降低水化热的效果上来看,降低水化热的效果排序则为:单掺 粉煤灰>复掺粉煤灰与矿粉>单掺矿粉;在28d时,C60混凝土的绝热温升从整体上高于C45混凝土,但是混凝土绝 热温升减小的幅度(分别不超过9.6%、6.1%和10.6%)不是很明显. 关键词:等强度;水化热;绝热温升;矿物掺合料 中图分类号:TU528.041 文献标识码:A 文章编号:1005-8249(2018)02-0003-05 Yi Peng Li Xiaoqing.Yang Shen (College of Hydraulic and Civil Engineering Xinjiang Agricultural University Urumqi 830052 China) Abstract:In the same intensity C45 C60 conditions the effects of mineral admixtures on the hydration heat of cementitious materials in concrete and the adiabatic temperature rise of concrete were studied respectively by using hydration calorimeter and concrete adiabatic temperature rise hyperbolic expression.The results of the study shows that:the incorporation of high content of mineral admixture effectively reduces the heat of cementitious material hydration heat and concrete adiabatic temperature rises reducing the effect of hydration heat from the effeet of reducing heat of hydration The effect order is as follows:single mixed fly ash double mixed fly ash and mineral powder single mixed mineral powder at 28 days the adiabatic temperature rise of C60 concrete is generally higher than that of C45 concrete but the decrease o...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2011No.6 研亮 磷酸镁水泥耐水性的影响因素与改进措施 Influencing Factors on Water Resistance of Magnesium Phosphate Cement and Its Improving Measures 毛敏,王智,王庆珍2,胡倩文,尤超2 (1.重庆大学化学化工学院,重庆400044;2.重庆大学材料科学与工程学院,重庆400045) 摘要:镁水泥(MPC)是一种新型的早强快硬胶凝材料,可作为修补材料应用于工程修补。从磷酸镁水泥的水化机 理出发,讨论磷酸镁水泥主要水化产物鸟粪石(MgNH4PO4·6H2O)的性质、形成及影响因素,及其与磷酸镁水泥耐水性 的关系。从理论上提出了通过选择合适活性、粒度和低CaO含量的原材料、优化配合比、控制体系pH值和掺加粉煤灰 等措施改善磷酸镁水泥的耐水性。 关键词:酸镁水泥;鸟粪石耐水性;水化机理 中图分类号:TQ172.729--9文献标 献标识码:A文章编号:1005-8249(2011)06-0015-04 Mao Min' ,Wang ,Wang Qing-zhen ,Hu Qian-wen' ,You Chao ( 1.College of Chemistry and Chemical Engineering ,Chongqing University ,Chongqing 400044 ; 2 .College of Material Science and Engineering ,Chongqing University ,Chongqing 400045 ) Abstract :Magnesium phosphate cement ( MPC)is a new rapid hardening cementitious material with high early strength ,which can be used as patching material in concrete repair works .Based on the hydration mechanism of MPC ,we discnssem the properties ,formation and influencing factors of main which is the maih hydration product of MPC ,struvite MgNH4P04o6H20 ),and the relationship between the struvite and water resistance of MPC was analyzed as well .For i...
关键词:生土材料;粉煤灰;磷石膏;抗压强度 中图分类号:TU528.59,TQ177.375 文蔽标识码:A 文章编号:1005-8249(2016)01-0003-05 Liu Zhihua', Yang Jiujun', Chen Bing² (1. School of Material Science and Engineering, Tianjin Chenjian University, Tianjin300384; 2.Department of Civil Engineering,Shanghai Jiaotong University, Shanghai 200240, China) Abstract: Ordinary Porland cement was used to prepare selfpacting raw soilbased materal with adding phosphogypsum and fly ash. The uncfind mpressive stength, sofening coeficient, and thal conductivity f selfmpating soilbased materal wre tste, and th inluee of conet of mehhmadly shonthenfecressve stenh asalsexpled aning ecrmicpe observation (SEM) was applied to sudy the diferent micrstructural charaeteristics of diferent modifed raw soil and the mechanism was also analyzed. Th expermenal results inicate that the addition of phhypum and ly ash canimprove the propertie of rw soilbasedmatel greatly. In this study, 0.5 can be regarded as the fiducial watersolid ratio, for the raw soil material modified by 10% cement blended with 10% phosphogpsum and 15% fly ash, the 28day strength is 13.5 MPa and the sofening coeficient is 0.94. Key Words;raw soil;fly ash;phosphogypsum;pressive strength 器时期。
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2014N0.4 综述 磷石膏的特性及其在新型建筑材料中的应用现状 Characteristics and Application of Phosphogypsum in New Building Materials 董超颖,孙振平 (同济大学先进土木工程材料教育部重点实验室,上海201804) 摘要:磷石膏是湿法生产磷酸的工业副产物,我国堆存量很大。本文分析了磷石膏的理化及矿物特性,评析了磷 石膏的主要改性技术对磷石膏在新型建筑材料中的利用技术作了详细的论述并且指出了在磷石膏开发利用过程中应 该重视的几大问题。 关键词磷石膏新型建筑材料;改性技术;应用 中图分类号:TQ177.375 文献标识码:A 文章编号:1005-8249(2014)04-0051-06 Dong Chao-ying ,Sun Zhen-ping ( KeyLaboratory of Advanced Civil Engineering Materials of Ministry of Education ,Tongji University ,Shanghai 201804 ,China ) Abstract Phosphogypsum is a by-product of the production process in wet process phosphorie acid .Its physical and chemical properties and mineralogical characteristies are analyzed in the article .The main modification technique and the development and utilization of phosphogypsum in the field of new building materials are discussed .Several problems which should be paid attention to in the process of development and utilization of phosphogypsum are proposed Key words :Phosphogypsum :New building materials :Modification technology :Application 众所周知,中国是一个农业大国,是全球最大的磷 膏,身体健康会受到影响,甚至会危害生命3,因此磷 肥生产国。中国的磷肥副产物磷石膏的排量位居世界 石膏的安全处置和资源化利用是当务之急。国家对磷 第一,而磷石膏的综合处置...