关键词:改性粉煤灰;含铜废水;吸附 中图分类号:X773文献标识码:A文章编号:1005-8249(2016)02-0018-04
Gao Yuhong, Wei Ruidi, Ren Liwei (School of Chemical and Materials, HanDan College, HanDan) Abstract: Fly ash was modified by Sdium hydroxide, Sulfuric acid, high temperature, ultrasonic and Sodium cabonate co=solvent. It' s investigated adsorption characteristics and the optimal adsorption coditons of Coppercontaining wastewater by modified ly ash. Results show that y ash canbe mdiied by the sdium hyroxide,high temperatre an solvent. dim arbate csolvent s thebest. he experimetal reuls show that: the optimum reaction time is 30 minutes, the most appropriate reaction temperature is 20 °C, the optimum pH value is 10. The adsorption processof Copper-cntaining wastewater on alkalimodified fly ash accords with Temkin and langmuir isotherm equations. Key Words:Modified fly ash; Copper=containing wastewater; Adsorption 粉煤灰是燃煤电厂煤燃烧后的灰,简称飞灰进行改性,吸附处理模拟含铜废水,筛选出了最有效的 (fly ash)。
粉煤灰综合利用 2017NO.2FLYASHCOMPREHENSIVEUTILIZATION 试验与应用
掺钢渣混凝土开裂机理研究* Study on Cracking Mechanism of Steel Slag Concrete
刘磊,刘小艳,张玉梅,梁涛,李田雨 (河海大学力学与材料学院,江苏南京210098) 摘要:钢渣作为混凝土骨料应用可能会引起水泥混凝土的稳定性不良的问题,例如混凝土开裂。
关键词:矿渣;混凝土;开裂;扫描电镜 中图分类号:TU528文献标识码:A文章编号:1005-8249(2017)02-0006-06 Liu Lei, Liu Xiaoyan, Zhang Yumei, Liang Tao, Li Tianyu ( 1. The Collge of Civil and Hydraulie Engineering,Xinjiang Agricultural Univesity, Urumqi 830052, China; ) Abstract:St sag socreteareateapplicatioyauseproblmwith prstabilityfcemnt nretesuasconretraking In this paer, twbath fre am withdiffere aes were eled fr th xriTren f th racking fstel slaad by the microstructure of sleel slag was studied by SEM. The free calcium oxide and free magnesium oxide contained in steel slag And other ponentsof theractionto produce calciumhydroxideand ocher volume of expansion products eventually lead to concretecracking Keywords stee slag: cnrete:crackedcaing lctromic 高性能混凝土是一种新型高技术混凝土是在大我国的钢渣利用率只有10%[2-3。
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2010N0.1 掺粉煤灰水泥胶砂的正交试验研究* Research on Orthogonal Experiment of Cement Mortar Blended Fly Ash 赵鹏,王跃峰,王尉和,赵亚丽,姚彩珍,关博文 (长安大学材料科学与工程学院,陕西西安710054) 摘要:采用正交试验方法,研究了粉煤灰掺量、细度和Na2SO 掺量对水泥胶砂试块抗折、抗压强度影响规律.结 果表明:粉煤灰掺量对水泥胶砂试块的7d抗折、抗压强度影响最显著;粉煤灰掺量和粉煤灰细度对28d抗折、抗压强度 影响都比较显著:而Na2S0 掺量对7、28d抗折、抗压强度影响不大. 关键词:粉煤灰;正交试验;水泥胶砂;抗折强度;抗压强度 中图分类号:TQ177.6*2 文献标识码:A文章编号:1005-8249(2010)01-0031-03 Institute of Materials Science and Engineering Chang an University Xian 710054 China) Abstract:Using orthogonal experiment the effects of fly ash content fineness and the content of Naz SO.on folding and pressive strength (7 28d)of cement mortar are studied.The results show that the content of fly ash have the most prominent influence on 7d folding and coempressive strength of cement mortar;the content of fly ash and the fineness of fly ash have significant influence on28 d folding and pressive减trength of ce- ment mortar:yet the content of Na SO4 all along have little influenee on 7d 28d folding and pressive strength of cement mortar. Key words fly ash;orthogonal experiment;cement mortar;folding strength pressive strength 粉煤灰是煤粉经高温燃烧后形成的一种似火山灰煤灰细度、Na2SO4掺量3个因素为变量做水泥胶砂试 质混合材料.本文测试了粉煤灰掺量对水泥凝结时间块,脱模后放在标准恒温恒湿养护箱中(湿度95.0% 及安定性的影响;重点研究了粉煤灰掺量、粉煤灰细RH 温度19.5~20.5℃)养护,研究所选的3个因素 度、Na2S0掺量3个因素对水泥胶砂试块7、28d抗在因素水平范围内对水泥胶砂试块的7、28d抗折、抗 折、抗压强度的影响规律. 压强度影响规律. 表1陕西省某电厂粉煤灰的成分/% 1试验 Na0 MgO SiO K0 Ca0 Fe0 1.1试验原材料 试验原材料包括陕西省某电厂的粉煤灰, 0.17 0.1055.8635.711.803.353.01 PC32.5级水泥、Na2S...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2016N0.2 试验与应用 掺粉煤灰对不同水泥品种钢渣混凝土基本力学性能试验研究 Experimental Study on Mechanical Properties of different Cement Steel Slag Concrete with Fly Ash 史阳光,冯勇1,王怀义2 (1.新疆农业大学水利与土木工程学院,乌鲁木齐830052;2.新疆水利水电科学研究院,乌鲁木齐830049) 摘要:通过粉煤灰替代部分普通硅酸盐水泥和高抗硫水泥的试验,结果得出两种水泥配制钢渣混凝土抗压、抗折 强度均随着粉煤灰掺量的增加呈递减趋势;但是当粉煤灰掺量一定时,两种水泥品种配制钢渣混凝土都表现出抗折、抗 压强度随着龄期的增长而提高.在粉煤灰掺量相同情况下,两种水泥品种钢渣混凝土相同龄期的抗压强度均表现普通 硅酸盐水泥钢渣混凝土高于高抗硫水泥钢渣混凝土;其抗折强度则大多表现出高抗硫水泥钢渣混凝土比普通硅酸盐水 泥钢渣混凝土的高. 关键词:粉煤灰;普通硅酸盐水泥;高抗硫水泥;钢渣混凝土;强度 中图分类号:TU528.2 文献标识码:A 文章编号:1005-8249(2016)02-0015-03 Shi Yang-guang' Feng Yong' Wang Huai-yi (1.College of Water Conservancy and Civil Engineering Xinjiang Agricultural University Urumqi Xinjiang 830052; 2.China Xinjiang Institute of water resources and Hydropower Research Urumqi 830049) Abstract:Through the test of fly ash replacement part of ordinary portland cement and high sulfur cement the analysis of two kinds of cement mixed with steel slag concrete pressive strength flexural strength with the increase of the content of fly ash but when the content of fly ash two kinds of cement concrete mixed with steel slag concrete are both resistant to bending pressive strength with age growth.In the same situation the pressive strength of two kinds of steel slag concrete with same age the pressive strength of concrete with steel slag in the same age and the concrete with high sulfur content of steel slag concrete and its flexural strength is high. Key Words:fly ash;ordinary portl...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2016NO.6 试验与应用 掺粉煤灰和矿粉对混凝土开裂性能的影响* The Affection to the Performance of Concrete Cracking of Fly Ash and Slag 丁海清,宋旭艳,韩静云 (苏州科技大学土木工程学院,江苏苏州215000) 摘要:选用粉煤灰、矿粉作为掺合料以单掺和复掺的形式掺入到硅酸盐水泥混凝土中,检测其坍落度和3d、28d 抗压强度以及早期抗开裂性能.研究结果表明:矿粉粉煤灰均会降低混凝土3d强度,矿粉可以提高混凝土28d强度, 粉煤灰掺量过大会降低混凝土28d强度.随着矿粉掺量的增加,混凝土坍落度随之降低,粉煤灰刚加人时会使混凝土坍 落度降低,但是随着掺量的升高,坍落度会逐渐增大;开裂方面:单掺时,粉煤灰与矿粉都在掺量为37%时,抗开裂效果最 佳,其中粉煤灰效果最好,复掺时,随着矿粉相对掺量的变大,裂缝的面积和数目都在增大. 关键词:粉煤灰;矿渣;混凝土;早期开裂 中图分类号:TU528.2 文献标识码:A 文章编号:1005-8249(2016)06-0029-04 Ding Haiqing Song Xuyan Han Jingyun (College of Civil Engineering Suzhou University of Science and Technology Suzhou 215000) Abstract:The slump 3 days 28 days pressive strength and the early crack resistance of Portland cement concrete which paste with fly ash slag were tested.The results showed that:slag and fly ash as the addition decreased 3d pressive strength of portland cement concrete and slag increased the 28d pressive strength of the concrete while too high quantity of fly ash reduced it.The slag had bad impact on the reduction of slump but the increase of fly ash made the slump of concrete large.In the aspect of cracking:when the addition of admixture is 37% the admixture would restrain cracking effectively and fly ash worked best.When the slag mixed with fly ash area and the number of the cracks increased with the increasing amount of the slag. Key words:fly ash;slag;concrete:early-age cracking 近年来,随着混凝土应用技术的不断发展,粉煤 1试验 灰、矿粉等矿物掺和料俨然已经成为了普通混凝土高 性能化...
粉煤灰综合利用 2017NO.1 FLYASHCOMPREHENSIVEUTILIZATION 试验与应用 掺石粉水泥与外加剂适应性研究 Study on the Adaptability of Mixed Cement with Admixtur 刘磊,钟贻辉²,刘小艳,何纪鹏,刘月3 (1.河海大学力学与材料学院南京210000;2.成都勘测设计研究院成都610000; 3.南京工业大学南京211800) 摘要:研究了掺人石粉后的水泥基和外加剂的适应性。
通过检测水泥净浆流动度和不同粉体的吸附量进一步解 释不同岩性、不同细度的粉体对外加剂的适应性情况。
结果表明外加剂的掺量极大的影响外加剂吸附量的大小。
在一 定范围内吸附量值随着外加剂掺量增加而增加。
粉体对外加剂的吸附量随着粉体细度的增加先增大后减小,存在转折 点。
同时石粉的岩性对外加剂的吸附量也有一定的影响。
关键词:石粉;外加剂;吸附量;适应性;细度 中图分类号:TU528.042文献标识码:A文章编号:1005-8249(2017)01-0044-04 Liu Lei',Zhong Yihui, Liu Xiaoyan’,He Jipeng’, Liu Yue 1.ColefMhMaialvestjn2hngEinratLiCh 3. Institute of Advanced Materials ,Nanjing University of Technology, Nanjing,211800) Abstract: This paper studies the stone powerincrporated into the cement and adixture adaptability It explained that powders of diffrent fnenessand admixture adaptability case by detecting the degree of fuidity of cemen pasteand the amount of adsorption f different poers. The results shw that adixure onten greatlyfet admixtureadsorption siz.Adsorption valueswillnrease when a erain range f addiive content inereaePower illaborb acxtures, whih presents first ireae adsorption and then dereae with the inereae of pwerfinne Meanwhile stone poelithology alohas sme mpact nthe adsrptin dmxte. Keywords: snepower, admixture; adsorption; adaptabilitystone pwdenenes 由于石粉细度较低,用作混凝土的填充材料,具有一定活性,可以在水泥中生成碱式碳酸钙,填充 可以弥补混凝土细颗粒的不足,减小水泥和砂石之水泥混凝土中的空隙,从而具有降低混凝土干缩率 间的空隙,具有减少泌水和离析的作用。
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2014N0.6 专题研究 掺合料对钢渣透水混凝土性能的影响 Influence of Admixtures on the Properties of Steel Slag Pervious Concrete 郑雯,王仕威,杨钱荣2 (1.上海同济建设工程质量检测站材料室,上海200092;2.同济大学材料科学与工程学院,上海201804) 摘要:研究了粉煤灰、矿粉和钢渣粉对钢渣透水混凝土力学性能、透水性和耐久性的影响,结果表明:掺加矿粉可 提高透水混凝土强度,掺加少量钢渣粉的透水混凝土的强度变化不大,而掺加粉煤灰后,透水混凝土强度降低.加人掺 合料后,混凝土透水系数有不同程度降低.掺加适量矿粉和钢渣粉,可得到强度及透水性较理想的混凝土.掺加粉煤 灰、矿粉和钢渣粉的钢渣透水混凝土具有较好的耐磨性和抗冻性并且其干燥收缩较基准透水混凝土有明显降低. 关键词:掺合料;粉煤灰;矿粉;钢渣;透水混凝土;性能 中图分类号:TU528.2 文献标识码:A 文章编号:1005-8249(2014)06-0003-04 Zheng Wen' Wang Shiwei' Yang Qianrong (1.Shanghai Tongji Institution of Inspection on Construction Quality Shanghai 200092 China 2.School of Materials Science and Engineering Tongji University Shanghai 201804) Abstract:The effects of fly ash GGBFS and steel slag powder on mechanical properties water permeability and durability of steel slag pervious concrete were studied.It shows that:Adding GGBFS to concrete can improve the strength of pervious concrete.Adding a small amount of steel slag powder to concrete the strength of pervious concrete has little change and the addition of fly ash reduces the strength.Adding admixtures to concrete water permeability coefficient of concrete decreases.Adding an appropriate amount of GGBFS and steel slag powder pervious concrete can get suitable strength and water permeability.Steel slag pervious concrete mixed with fly ash GGBFS and steel slag powder can obtain better abrasion resistance and freeze resistance and dry shrinkage of pervious concrete ...
粉煤灰综合利用 FLYASHCOMPREHENSIVEUTILIZATION 2016 NO.1 试验与应用 掺合料对灌浆加固材料性能的影响 Effect of Admixture on the Properties of Grouting Reinforcing Material 陈哲,李新航”,杨钱荣”,徐敬杨,张俊杰 (1.杭州固特建筑加固技术工程有限公司,杭州310012;2.杭州市建设工程质量安全监督总站,杭州310005; 3.同济大学材料科学与工程学院,上海201804) 摘要:研究了粉煤灰、粉煤灰渣和矿粉对灌浆加固材料水化热、流动性、强度以及体积稳定性等性能的影响。
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2010N0.6 用 掺加粉煤灰的污泥沉降浓缩效果与利用* Thickening Property and Utilization of Sewage Sludge Modified by fly ash 苏柳铭,岳燕飞,陈伟,黄义雄,钱觉时 (重庆大学材料科学与工程学院,重庆400045) 摘要:改善污泥浓缩和脱水性能有利于污泥的处置和利用,从污泥用于建材原材料的角度,试验研究了粉煤灰在 污泥沉降浓缩过程中的作用.结果显示,粉煤灰的最佳掺量为5%时,脱水混合物含水率为60%左右,低于纯污泥脱水 后80%左右的含水率,将大大有利于后续的处理与利用;经粉煤灰改性后浓缩脱水得到的污泥可用作烧制陶粒. 关键词:粉煤灰,沉降,浓缩,陶粒 中图分类号:X703 文献标识码:A文章编号:1005-8249(2010)06-0019-04 SU Liuming YUE Yan-fei CHEN Wei HUANG Yixiong QIAN Jueshi (College of Material Science and Engineering Chongqing University Chongqing 400045) Abstract:To improve thickening and dewatering properties of sewage sludge is beneficial to disposal and utilization.The influence of fly ash on sludge settlement was investignted experimentally.It is shown that the moisture content of dewatered sludge with fly ash dosage of 5%was 60% which is favor for its subsequent processing and use.The dewatered sludge modified by fly ash can be used as raw materials to produce ceramsite. Key words fly ash setling thickening.ceramsite 粉煤灰是一种具有潜在活性的粉末状材料,其物只是污泥减容减量的一个环节,最终目标则应是污泥 理化学性质取决于燃煤的品种、煤粉的细度、燃烧方式的处理与资源化.污泥建材资源化是污泥利用的重要 和温度、收集和排灰方法等,其化学成分包括Si02、方向341,因为污泥的建材资源化不仅利用污泥量大, Al2O3和F2O3等.粉煤灰比表面积较大,具有一定而且污泥建材生产和使用对环境影响最小3.目前 的吸附能力,其等温吸附规律符合Freundlish吸附等多数研究是利用粉煤灰的吸附和分散功能对污水中的 温式,它是一种廉价的吸附材料,有时甚至可代替活性 有害物质进行吸附沉淀,以达到净化污水的作用,但是 碳、硅胶、活性A12O3等用作专用吸附剂. 仍然会产生大量泥渣,给环境带来负担.直接采用含 污泥处理主要包括浓缩、消化、脱水等工艺,其目 水率80%左右的污泥与粉煤灰混合烧制建材制品可 的是降低污泥含水率,减小污泥体积,以减轻后续处理作为污泥资源化有效途径之一,然而,粉煤灰加人污泥 的压力[.污泥浓缩方法以重力浓缩应用最为广泛,中需要充分混合,烧制...
粉煤灰综合利用 FLYASHCOMPREHENSIVEUTILIZATION 2011 NO.5 传题研免 掺Ⅱ级粉煤灰胶砂试件在高浓度硫酸盐侵蚀下 的破坏特征与破坏机理分析* Destruction Features and Failure Mechanism Analysis of Mixed I Fly Ash Motar Specimens in the High Concentrations of Sulfate Solution 李方元,唐新军,阿里木江苏拉依曼,周阳² (1.新疆农业大学水利与土木工程学院,乌鲁木齐830052;2.石河子大学水利建筑工程学院,石河子832000) 摘要:按高性能混凝土配比方法制作不同水胶比、I级粉煤灰不同掺量的胶砂试件,进行硫酸盐侵蚀试验1nn采用 扫描电镜(SEM)和能谱(EDS)对试件进行微观观测、分析,结果表明:在低水胶比情况下,掺粉煤灰的胶砂试件受高浓度 要与水胶比、粉煤灰掺量、侵蚀龄期、侵蚀溶液浓度等因素有关1nn 关键词:Ⅱ级粉煤灰;胶砂试件;硫酸盐侵蚀;微观结构;侵蚀破坏特征 中图分类号:TU528.0文献标识码:A文章编号:1005-8249(2011)05-0009-05 Li Fang-yuan1 Tang Xin-junl Alim Sulayman1 ZHOU Yang2 (1.College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, Xinjiang,China 2. College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi 83200, Xinjiang,Chian) Abstract Thecapablityof resising sulfecoosion wastested among the diferent cntens oIly h and diferet waerbinderatios f mortar specien which were madeby the method of hig perfomane concrete.Microcopic obervation and analysis of mortar specimens was observed with scanning electron microscope (SEM) and energy dispersion spectrum (EDS) . The results indicated thst under the low wster-binder rtio,Spcimen ersin dmage tyeis gypumfilure tye,no etrngt Af)tyeroindaage.We also foud hat the rin nlyOcd in the urface and the factors affting the thickee of Eroon damge layer mainly include the walerbinder ratiothe cote f fly ash,the eroeion ages、the erion solution concentration,et. Key words: I fly ash; mortar specimen; sulfte correion; microstructure; Erosion destruction feture 混凝土遭受硫酸盐侵蚀本质上是水泥石的侵硫酸盐侵蚀后的外部特征、内部微观结构以及影响因 蚀"1nn混凝土受硫酸盐侵蚀破坏的程度受养护条件、素,以便进一步了解混凝土受硫酸盐侵蚀的特点及其 水泥品种、水胶比、掺合料掺量、硫酸盐浓度等诸多因作用机理,为有硫酸盐侵蚀环境的混凝土结构设计提 素影响1nn这使得硫酸盐对水泥混凝土的侵蚀现象及其 供参考依据1nn 过程变得复杂1nn本文通过掺Ⅱ级粉煤灰胶砂试件在短 龄期养护条件下的硫酸盐侵蚀试验,采用宏观观测和 1试验材料与试验方法 微观电镜观测技术,分析掺Ⅱ级粉煤灰胶砂试件遭受 1.1试验原材料 (1)水泥:乌鲁木齐市青松水泥厂生产的P.042.5R ‘基金项目:新疆高等学校科研计划重点项目资助(XJ 的水泥(其各项物理指标见表1,化学指标见表2);(2)粉 EDU2008115) ; 煤灰:新疆苇湖梁电厂晨科公司生产的Ⅱ级粉煤灰 新疆水...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2011NO.2 专题研光 拜耳法赤泥对水泥浆体孔溶液碱度及强度发展的影响 Influence of Bayer Red-mud on the Alkalinity of Cement-based Material Pore Solution and the Strength Development 吴芳,李利,周代军,李志杰 (重庆大学材料科学与工程学院,重庆400045) 摘要:通过测定同水胶比下拜耳法赤泥与普通硅酸盐水泥、硫铝酸盐水泥复配的水泥浆体孔溶液州值和抗压强 度,结合XRD分析研究了赤泥掺量对复配体系孔溶液碱度及抗压强度的影响.研究表明,普通硅酸盐水泥浆体和硫铝 酸盐水泥浆体孔溶液碱度均随赤泥掺量的增加而增大.接人赤泥并不会引起水泥水化后期孔溶液碱度的增加.普通硅 酸盐水泥中赤泥掺量宜控制在30%以内,而硫铝酸盐水泥中赤泥掺量则不能超过20%.普通硅酸盐水泥孔溶液碱度发 展与强度之间存在明显的相关性. 关键词:拜耳法赤泥;pH值;强度 中图分类号:TQ172.4*4 文献标识码:A文章编号:1005-8249(2011)02-0007-05 Wu Fang Li Li Zhou Dai-jun Li Zhi-jie Institute of Material Science and Engineering of.Chongqing University Chongqing 400045 China) Abstract:The pH value and presive strengh of different bayer red-mud content with ordinary portland cement and sulphoaluminate cement paste pore solution under the same water cement ratio were tested The effect the red mud quantity were analyzed by XRD.Test results showed a linear increase in alkalinity of portland cement paste pore solution and sulphoaluminate cement paste pore solution with Bayer red-mud. Red mud would not increase the late alkalinity of cement-hased material pore solution.the mixing amount of red mud in the portland cement shouald be in the range of thirty pereent red mud while the mixing amount of red mud in the sulphoaluminate cement should not exeed twenty pereent. The correlation existed obvivusly between the alkalinity and strength of portland cement. Key words:Bayer red-mud:PH value :Strength 拜耳法赤泥是使用...