钢结构现场喷砂及除锈施工工法.doc
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1、influence. Only establish a correct concept of values, the concept of power, performance, from mind set career goals for the party and the people, and to properly treat and use their powers, creating a stand the inspection history of achievements. Instead, the view does not have the correct values,
2、the concept of power, achievement, accelerated development of not only impossible, but also bred and spreading of formalism and bureaucratism and corruption, corrosion of cadres, corrupted party and society, damage the party and the masses. Therefore, the leading cadres should want to resist corrupt
3、ion, guard of Defense, will first have to establish the correct values, the concept of power and start Outlook. It should be noted that currently the County ranks of cadres are good, but it cannot be denied that some of our leading cadres, in the treatment of values, power, performance and other iss
4、ues still exist on some wrong ideas and behavior. On value orientation of treating issues such as, some leading cadres tend to put self-interest above the overall interests, there is a Government powers, powers of personal interests, personal power phenomenon. In treats power of problem Shang, offic
5、er read not are, some leaders too addiction Yu power pursuit, adjustment to better of location Shi on complacency, and carried away, once didnt adjustment good on has negative slack, and sent complaints told grumbling, cannot to good of mentality right treats personal of retreat circulation; some on
6、ly may official, and unwilling to work, always calculations personal gains and losses, each other comparisons, than fame, and than status, and than income, is not than contribution; very minority leaders even put power as profit of tool, using terms seek self-interest , Do not give benefits didnt ac
7、t, gives the advantage to do. In treats achievement of problem Shang, some leaders also lack created achievement of strongly pursuit, development confidence insufficient, and thought not liberation, work muddle along, and perfunctory, unambitious, and inaction; also some eager for quick success and,
8、 work bishijiuxu, on easy see have see of achievement happy, on unknown of hard work is unwilling to input energy, even make formalism, and pendulum showy, habits Yu do cosmetic, no real sank heart June to caught development, and so on. These problems are not solved, is bound to seriously affect the
9、 growth of leading cadres, and even some cadres resorting to crime as a result of the road, eventually come to downfall end. As a leader, only to establish the correct values, the concept of power and Outlook, always keep the spirit of noble pursuit, can we from the thought of constructing the degen
10、eration in the deep defence, . Plenum put forward the important exposition of the construction of Socialist core value system, and pointed out the direction for us. Socialist core value system consists of four basic elements: Marxist guiding ideology, the common ideal of socialism with Chinese chara
11、cteristics, patriotism at the core of national spirit and innovation as the core spirit of the times, with eight honors and eight disgraces as the main content of socialist concept of honor and disgrace. From these four elements, especially from the eight honors and eight disgraces as the main conte
12、nt of Socialist honor or disgrace view can be seen, fundamentally reflects the values of the Socialist core value system requirements for leading cadres to establish the correct values, form the Basic code of ethics and code of conduct provides the basis and standard. Our leading cadres must establi
13、sh with the eight钢结构现场喷砂除锈及防腐施工工法钢结构现场喷砂除锈及防腐施工工法中铁十七局集团建筑工程有限公司前言钢结构现场喷砂除锈及防腐施工是在传统工艺上改进的一种快捷并适用于现场施工的一种新工艺。钢结构特别是工业钢结构因为环境因素受腐蚀的程度比较大,所以钢结构防腐的质量要求比较高,普通工艺的防腐已经不能满足现代工艺的需要。中铁十七局建筑工程有限公司在山西焦化股份有限公司30万吨/年焦油加工改质沥青装置主体框架工程以及富仕康(太原)科技园A5、A6厂房中,摸索出一套有异于传统工艺的施工方法,通过现场实践,取得了较快的施工速度和较显著的社会、经济效益。1 工法特点1.1不受传
14、统工艺只在工厂内施工的约束。1.2工艺简单、操作简便、劳动力消耗小以及成本低。1.3流水作业,消除施工间歇时间,从而使工期大大缩短。1.4保证质量的同时降低了材料的浪费。2 适用范围适用于各类钢结构构件以及工业设备的除锈及防腐施工。3 工艺原理喷砂除锈及防腐施工的原理是利用空气压缩机产生的压强使砂粒获得冲量将其喷射在钢结构构件表面,砂粒与金属表面相互摩擦从而使附着在金属表面的铁锈脱落,然后再将防腐油漆喷涂在金属表面使整个金属表面结成一层漆膜,从而阻止水和空气的侵蚀以达到防腐的效果。4 施工工艺流程及操作要点4.1施工工艺流程(见图1)基层处理(喷砂除锈)喷涂第一遍底漆构件安装喷涂第二遍底漆机械
15、调试、材料选择漆膜厚度检测(中间验收)喷砂验收喷涂面漆喷涂中漆 否 是 否 是图1 施工流程图4.2操作要点4.2.1机械调试、材料选择(1)机械调试 空气压缩机的压力应根据喷嘴的直径选择压力,喷嘴直径为68mm时,压力保持在0.50.6Mpa。(2)材料选择石英砂的质量对喷砂的质量有直接的影响,应达到以下要求:a.重度大、韧性强、有一定粒度要求;b.使用前不易破裂、散失出的粒尘最少;c.喷射后不应残留在钢材的表面上;d.磨料的表面不得有油污,含水率小于1%。e.粒径3.20.63mm,0.8筛余量不小于40%(石英砂中可参入20%的河砂增加级配)。4.2.2基层处理(喷砂除锈)(1)将钢结构
16、构件放在钢架(马镫)上,砂罐内装满石英砂,空气压缩机的压力保持在0.50.6Mpa,保持喷射角度为3570,喷嘴距离金属表面为100200mm。将砂粒均匀地喷射到金属表面,直到金属表面露出金属的本来颜色为止。(2)金属表面的除锈等级,喷石英砂处理后达到Sa2.5级。除锈完毕后应进行金属外观的验收,其外观检查要求为:非常彻底地除锈,钢材表面无可见的油脂、污垢、氧化皮、铁锈和油漆涂层等附着物。任何残留的痕迹应仅是点状或条状的轻微色斑。(3)除锈后的金属表面必须采用干燥的压缩空气或毛刷将锈尘和残余磨料清除干净后方可进行下道工序。4.2.3喷砂验收(1)喷砂除锈的质量标准应符合钢结构工程施工质量验收规
17、范GB 502052001的要求。检查钢材表面除锈质量,如未达到规定的除锈等级标准,应重新除锈,直达到标准为止。(2)金属表面粗糙度的检查:应以喷涂第一遍底漆形成封闭的漆膜为准。4.2.4喷涂第一遍底漆(1)钢材基层处理完后应在46h内喷涂第一道底漆。在正式喷涂前,应检测金属表面的温度并在样板上进行试喷,直到一次性喷涂(避免重复喷涂)漆膜厚度达到设计要求方可正式喷涂。(2)喷涂油漆时,将配置好的油漆装入喷壶内,保持喷壶喷嘴距离金属表面200mm250mm,然后在金属表面做匀速移动,移动的速度应控制在10cm20 cm/s之内,直到金属表面完全被油漆所覆盖。采用以上参数油漆每遍的厚度应达到25-
18、30m。(3)特殊部位的施工地脚螺栓和底板、 高强螺栓连接点接触面,施工图中注明的不涂层部位,不得喷涂。安装焊缝处留3050mm宽暂时不涂,待构件吊装完毕后再进行喷涂。4.2.5漆膜厚度检测(中间验收)漆膜厚度检测采用漆膜测厚仪检测,厚度偏差为5m。4.2.6构件安装待第一遍底漆全部干透并经漆膜厚度检测合格后方可进行安装。4.2.7第二遍底漆及中漆、面漆喷涂料安装完毕并经验收合格后进行第二遍底漆,之后按油漆干透所需的时间为间隔进行每一遍油漆喷涂,直至两遍中间漆及两遍面漆全部完成。5 材料与设备5.1材料准备(1)石英砂、河砂(2)防腐油漆底漆采用与环氧富锌漆同等级(或更高等级)的防腐底漆,中漆
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- 钢结构 现场 喷砂 除锈 施工
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