360足彩

洛阳元洲混凝土有限公司欢迎您的到访,有任何问题请致电咨询我们: 李经理 18037971907 0379-80868000
360足彩
当前位置: 360足彩

你知道不规范施工对混凝土质量危害多大吗?

FABUSHIJIAN:2018-04-25 LIULANCISHU:1189

混凝土强度是否有规律的发生、发展,混凝土表面缺陷能否得以控制,混凝土耐久性是否能够满足使用年限,这些都与施工现场的施工工艺、施工细节以及对混凝土的养护密切相关。在此浅谈施工现场的不规范施工给混凝土质量带来的影响和危害。                 

360足彩                   

1混凝土振捣顺序和方法不当


360足彩HUNNINGTUZHENDAOWEIANGUIDINGSHUNXUJINXING,ZHENDAOFANGFABUDANGHUOJUBULOUZHEN,HUIDAOZHIJUBUSHA、SHIJIZHONG,SHIHUNNINGTUSHUSONGBUMISHI,CHUXIANFENGWOZHUANGKONGDONGHUOXINGCHENGJUBUKONGDONG,YOUQIZAIGANGJINMIJIBUWEI,RONGYICHUXIANFENGWO、LUJINDENGBULIANGZHENGJI。


2不对混凝土构件进行养护


360足彩SHUISHISHUINISHUIHUAFANYINGDEBIYAOTIAOJIAN,YINCIZHOUWEIHUANJINGSHIDUDUIHUNNINGTUQIANGDUNENGFOUZHENGCHANGFAZHANYOUXIANZHUYINGXIANG。SHIDUBUGOU,HUNNINGTUHUISHISHUIGANZAOERYINGXIANGSHUINISHUIHUAZUOYONGDEZHENGCHANGJINXING,SHENZHITINGZHISHUIHUA。SHOUGANZAOZUOYONGDESHIJIANYUEZAO,ZAOCHENGGANSUOKAILIEYUEYANZHONG,JIEGOUYUESHUSONG,QIANGDUSHOUDAODESUNSHIYUEDA,HUNNINGTUBIAOMIANTANHUAYEJIUYUEDA,NAIJIUXINGNENGJIANGDI。


3混凝土浇筑时落程或浇筑层厚度过大


360足彩JIAOZHUHUNNINGTUSHI,YOUDINGBUJIAOZHUDEGANGJINHUNNINGTUZHU、QIANGDENGGONGCHENG,RUOGUOGAO,HUNNINGTUZHONGDECUGULIAOCONGHUNNINGTUZHONGFENLICHUQU,GUNLUOZAIHUNNINGTUDUIDEWAICEHUOZHEDIBU,HUOZHEZAIQINGLUOGUOCHENGZHONG,CUGULIAOXIANLUO,ERSHAJIANGLUOYUHOUMIAN,ZAOCHENGHUNNINGTUDELIXI,SHICUGULIAOJIZAILOUBANBIANJIAO,YIXINGCHENG“FENGWO”、“MAMIAN”、“LANGEN”HUOZAOCHENGSHA、SHIFENBUBUJUNYUN。ZAIZHEZIYOUQINGLUOGAODUGUOGAO,HUNNINGTUJUYOUJIDADECHONGJILI,TAJIANGZAWANGANGJIN,SHISHUXIANGGOUJIANGUJINCUOWEI,ZHEIXIEDOUJIANGYINGXIANGGOUJIANDESHOULIXINGNENG。


4 混凝土强度低于拆模强度而过早拆模


HUNNINGTUQIANGDUDIYUCHAIMOQIANGDUERGUOZAOCHAIMO,YIZAISHOULAQUCHUXIANLIEFENG,SHENZHISHOUYAQUYEPOHUAI,ZAOCHENGANQUANSHIGU;HUNNINGTUGUOZAOCHAIMOJIANGHUIJIADAHUNNINGTUDEXUBIANLIANG,DAOZHIJIEGOUBIANXING;GUOZAOCHAIMO,YOUYUHUNNINGTUQIANGDUDI,CHAIMOGUOCHENGZHONG,YICHUXIANTANLENGDIAOJIAOHUOJUBUTANTAXIANXIANG,XUERUOGOUJIANDUANMIAN,YINGXIANGCHENGZAINENGLIHEWAIGUANZHILIANG;YINWEIHUNNINGTUQIANGDUDI,HUNNINGTUYUGANGJINGONGTONGGONGZUONENGLICHA,ZAIGOUJIANZIZHONG、SHIGONGHEZAIHEQITAZHENDONGZUOYONGXIA,YIYINQIGANGJINZAIHUNNINGTUNEIHUADONG,CONGERJIANGDIGANGJINDEWOGUOLI;GUOZAOCHAIMO,DAOZHIHUNNINGTUBIAOMIANGUOZAOSHISHUI,JIASUHUNNINGTUBIAOMIANTANHUASHIHUNNINGTUNAIJIUXINGNENGXIAJIANG。


5施工单位擅自处理混凝土质量缺陷


360足彩ZAISHIGONGGUOCHENGZHONG,CHANGYINSIXIANGHEJISHUSHANGDEQUEXIAN,SHIDESHIGONGDANWEIDUIHUNNINGTUGOUJIANCHANSHENGGEZHONGQUEXIAN,RUFENGWO、MAMIAN、LIEFENG、LUJIN、KONGDONGDENGRENYIXIUBU,QUEWEIJINGJIAGUBUQIANG,JIANGZAOCHENGHUNNINGTUGONGCHENGDEZHONGSHENQUEXIANERYINGXIANGJIANZHUDESHIYONGSHOUMING,QIEDUIHUNNINGTUSHITIJIANCESHI,YINGXIANGDUIHUNNINGTUXINGNENGDEZHENSHIPANDUAN。


6施工现场任意加水


360足彩SHIGONGXIANCHANGGUANLIBUYAN,GONGRENWEIFANGBIANYUSHIGONG,JINGCHANGCHUXIANXIANGYIBANHAODEHUNNINGTUZHONGJIASHENGSHUIDEXIANXIANG,JIMEIYOUJINGGUOSHUANGFANGJISHUGUANLIRENYUANDESHANGDINGRENKEYUJIANZHENG,GENGWEIZAIJIASHUIHOUJINXINGERCIJIAOBAN。ZAIYIXIEXIANCHANGSHENZHIYONGSHUIGUAN、SHUIQIANGZHIJIEZAIBENGCHEJINLIAODOUZHONGJIASHUI,YANZHONGYINGXIANGLEHUNNINGTUBANHEWUDEZHILIANG,ZAOCHENGHUNNINGTUSHUIHUIBIZENGDA,YOULISHUIHECENGJIANSHUIZENGDUO,ZENGJIALEHUNNINGTUYINGHUAJIANGTIDEKONGXILV,XUERUOLEHUNNINGTUZHONGSHUINIHEGULIAODEJIEMIANZHANJIELI,JIANGDILEHUNNINGTUDEQIANGDUHENAIJIUXING。


7浇筑管理不当,布料不匀


YOUYUJIAOZHUSHUNXU、BULIAOBUDANG,HUIZAOCHENGHUNNINGTUGOUJIANZHONGSHA、SHILIAOBUJUNYUN,YINGXIANGGOUJIANHUNNINGTUQIANGDUHEZHURUFENGWO、MAMIAN、KONGDONGDENGQUEXIANDECHANSHENG,JIGONGCHENGZHILIANGZAOCHENGYINHUAN,YEKENENGGOUCHENGZHONGDADEZHILIANGSHIGU。


8施工现场要求坍落度过大


HUNNINGTUJIEGOUBUWEIYOUYUGANGJINMIJI,SHIGONGDANWEIWEILEFANGBIANSHIGONG,YAOQIUHUNNINGTUTANLUODUGUODA,YINQIGULIAOCHENDIAN,BUFENJIEGOUJIANGTIMIJI,ZAOCHENGHUNNINGTUJIEGOUQIANGDUBUJUNYUN,MISHIDUJIAOCHA,YINGXIANGHUNNINGTUDECHENGZAINENGLI。


9洒生水收面


360足彩SHIGONGXIANCHANGGONGRENWEILEFANGBIANSHOUMIAN,SASHENGSHUIXIANXIANGYESIKONGJIANGUAN,SHIGONGXIANCHANGJISHURENYUANYEBUYUZHIZHI,YANZHONGYINGXIANGLEHUNNINGTUDEZHILIANG。XIANGHUNNINGTUSASHENGSHUISHOUMIAN,ZENGDALEHUNNINGTUBIAOMIANDESHUIHUIBI,ZENGJIALEYINGHUAJIANGTIDEKONGXI,SHIHUNNINGTUBIAOMIANSHUSONG,JIANGDILEHUNNINGTUBIAOMIANDEQIANGDUHEKANGTANHUADENENGLI,ZAOCHENGLEHUNNINGTUBIAOMIANQIHUI、FANSHAHEKAILIE。


360足彩ZONGZHI,SHANGPINHUNNINGTUSHUBANCHENGPIN,HUNNINGTUDEZHILIANGQUEXIANHEQIANGDUSHIFOUYOUGUILVDEZENGZHANG,XUYAOSHIGONGDANWEIDUIHUNNINGTUJIAOZHU、ZHENDAO、YANGHU、ZHEGAIBAOHUDENGGONGYIJINXINGJINGXINZUZHIHESHISHI,YANGEANXIANGYINGDEBIAOZHUNGUIFANJINXINGSHIGONG,CAINENGBAOZHENGHUNNINGTUQIANGDU,QUEBAOGONGCHENGZHILIANG。


 

由于施工单位对施工人员的培训不够,导致许多施工人员对混凝土的浇筑、振捣、养护和拆模等工序违反国家标准、施工规范和规程规定,随意施工,因而常常出现不合格工程。下面就分别叙述几种常见的违规行为及其危害。       


1 随意加水


ZAI GB/T 14902-2012《YUBANHUNNINGTU》BIAOZHUNZHONGDE 7.5.2 TIAOMINGQUEGUIDING:“JIAOBANYUNSHUCHEZAIZHUANGLIAOQIANYINGJIANGJIAOBANGUANNEIDEJISHUIPAIJIN,ZHUANGLIAOHOUYANJINXIANGJIAOBANGUANNEIDEHUNNINGTUJIASHUI”。YOUXIESHIGONGRENYUANWUSHIZHEIYIGUIDING,WEILEFANGBIANBENGSONG,JIANQINGTANPINGDEZULI,JIUSIZIYONGSHUIGUANXIANGBENGDOUHUOGUANTONGNEIJIASHUI;GENGYOUSHENZHE,BUKANLAILIAODEGANXI,XIANFANGSHANGSHUIGUANBIANJIASHUIBIANJIAOZHU。


360足彩XIANGHUNNINGTUBANHEWUNEIJIASHUI,HUIJIADAHUNNINGTUDESHUIJIAOBI,SHUIJIAOBIYUEDA,HUNNINGTUDEZUIZHONGQIANGDUYUEDI,RUOJIASHUIGUODUO,JIUHUIDAOZHIHUNNINGTUDEQIANGDUDABUDAOSHEJIYAOQIU,BUNENGTONGGUOYANSHOU,ZUIHOUTONGGUOJIAGUBUQIANGLAIBUJIU,YANZHONGZHESHENZHISHITUIDAOZHONGLAI。ZHEIJIUJISHIGONGQIYEZAOCHENGHENDASUNSHI。YINCI,GUOJIABIAOZHUNMINGQUEGUIDING,YANJINXIANGHUNNINGTUBANHEWUNEIJIASHUI,DANGHUNNINGTUBANHEWUDETANLUODUPIANXIAOSHI,KEYIQINGGUANCHEJIASHIYUANANZHAOQIGONGSIDEJISHUJIAODIJIARUSHILIANGDEWAIJIAJIDIAOZHENGTANLUODU,YIBIANYUBENGSONGSHIGONG。


2 超高浇筑,延时振捣

ZAI GB 50164-2011《HUNNINGTUZHILIANGKONGZHIBIAOZHUN》ZHONGDE 6.6.9 TIAOZHONGMINGQUEGUIDING“JIAOZHUSHUXIANGCHICUNJIAODADEJIEGOUWUSHI,YINGFENCENGJIAOZHU,MEICENGJIAOZHUHOUDUYIKONGZHIZAI 300~350mm;BINGKEDUOANPAIZHENDAOBANG,YINGBIANJIAOZHUHUNNINGTUBIANZHENDAO,YILIANXUCHENGXING”。YOUDEGONGDIAN 1.5 MIWEIYICENG,SHENZHIDUIQIANGHELIANGBANTONGSHIJIAOZHUSHI,YICIBAQIANGTIJIAOZHUDAOBANDING。HAIYOUGEBIEDESHIGONGRENYUANDUIBENGSONGHUNNINGTUJIAOZHUMEIYOUJINGYAN,ZAIQIANBIANJIAOZHUDERENYUANBUGUJIHOUBIANZHENDAORENYUANSHIFOUNENGGANDESHANG,JIEGUOSHIZHENDAOBANGPIANSHAO,ZHENDAOSUDUJIAOMAN,DAOZHIJIAOZHUYUZHENDAODEJULILADA,JIAZHIJIAOZHUWENDUJIAOGAO,SHIDEJIAOZHURUMODEHUNNINGTUTANSUNJIAOKUAI,DANGJIAOZHU 20min HOUZAIZHENDAOSHI,HUNNINGTUYIJINGBURONGYIZHENSHI,ZHENDAOBANGBACHULAIHOUHUILIUYOUKONGDONG。ZHEISHIHOUCAIZHIDAOBAQIANBIANJIAOZHUGONGZUOTINGXIALAI。CHAIMOHOU,GAIDUANQIANGTIYOUDUOCHUCHUXIANKONGDONG、LUJINHUOFENGWOMAMIAN。


360足彩CHAOGAOJIAOZHURONGYIZAOCHENGZHANGMO,RUGUOBUNENGSUIJIAOZHUSUIZHENDAO,JIUHENRONGYICHUXIANZHENDAOBUSHIXINGCHENGKONGDONG、LUJINHEFENGWOMAMIAN。JIAOZHU 3 MIYINEIDEQIANGTISHI,KEYIFENLIANGCENG,RUOBENGSONGHUNNINGTUDEHEYIXINGJIAOHAO,RONGYIZHENDAOMISHI,KEYIBAFENCENGGAODUTIGAODAO 1000~150mm。DANGZHENDAOSUDUGENBUSHANGJIAOZHUSUDUSHI,YINGMASHANGJIAOTINGJIAOZHU,DAIZHENDAORENYUANGENSHANGLAISHIZAIKAISHIJIAOZHU。


3混凝土在工地等待时间过长


ZAI GB 50164-2011 《HUNNINGTUZHILIANGKONGZHIBIAOZHUN》ZHONG 6.6.14 TIAOGUIDING:HUNNINGTUBANHEWUCONGJIAOBANJIXIECHUHOUDAOJIAOZHUWANBIDEYANXUSHIJIANBUYICHAOGUOBIAO 6.6.14 DEGUIDING。JIDANGQIWEN ≤25℃ SHI,YANXUSHIJIANBUYICHAOGUO 150 FENZHONG;DANGQIWEN >25℃ SHI,YANXUSHIJIANBUYICHAOGUO 120min。ERZAIGONGDIJIAOZHUGOUZAOZHUHUOERCIJIEGOUSHI,WANGWANGDOUCHAOGUO 180min,GENGYOUSHENZHEHUICHAOGUO 300min。TEBIESHIZAIXIAJISHI,CHAOGUO 3hDEHUNNINGTUJIUYIJINGBURONGYIJIAOZHU,RUOYONGWAIJIAJIDIAOXIZAIXINGJIAOZHU,ZHEISUANSHIJIAOHAODE;YOUXIEGONGDIJIUZHIJIEJIASHUIDIAOXIHOUJIXUJIAOZHU,ZHEIYANGSHIBIZAOCHENGHUNNINGTUQIANGDUDEBUZU。JIEJUEDEFANGFASHI,GONGDICAILIAOYUANZAIJIHUAJIAOZHULINGXINGGONGCHENGSHI,YINGGENJUJIAOZHUSUDUHEBIAOZHUNGUIDINGDEYANXUSHIJIANLAIQUEDINGMEIYICHEDEYUNSHUFANGLIANG,ERBUNENGYICHEYUNSHUGUODUO,ZAOCHENGCHAOSHIJIAOZHU。


4养护太差


360足彩GB 50204-2002《HUNNINGTUJIEGOUGONGCHENGSHIGONGZHILIANGYANSHOUGUIFAN》ZHONG 7.4.7 TIAOGUIDING:“YINGZAIHUNNINGTUJIAOZHUWANBIHOUDE 12 XIAOSHIYINEIDUIHUNNINGTUJIAYIFUGAIBINGBAOSHIYANGHU;CAIYONGJIAOSHUIFANGFASHI,JIAOSHUICISHUYINGNENGBAOCHIHUNNINGTUBIAOMIANCHUYUSHIRUNZHUANGTAI,BUDESHAOYU 7d;CAIYONGSULIAOBUFUGAIYANGHUDEHUNNINGTU,QICHANGLUDEQUANBUBIAOMIANYINGFUGAIYANMI,BINGYINGBAOCHISULIAOBUNEIYOUNINGJIESHUI;HUNNINGTUQIANGDUDADAO 1.2N/mm2 QIANBUDEZAIQISHANGANZHUANGMOBANHUODIAOFANGJIAOZHONGDEGANGJINHUOJIAGUANDENGZHONGWU”。YOUXIESHIGONGDANWEIBUSHEZHUANRENYANGHUHUNNINGTU,SHENZHIGEBIEDANWEIDUIHUNNINGTUGOUZAOZHUHEJIANLIQIANGJIUGENBENBUYANGHU。BIZHECENGJINGCANYULEYIGE C25 GOUZAOZHUDEHUIDAN,HUIDANLINGQIWEI 29d,JIAOZHURIQIZAI 4 YUEFEN。HUIDANQIANGDUBUZU  20MPa,TANHUASHENDUDADAO 7mm。HAIYOUSHAOSHUDANWEIDUIHUNNINGTUXIANJIAOBANBUNENGJISHIFUGAISULIAOBUYANGHU,ZAOCHENGHUNNINGTUZAIZAOQICHANSHENGBUGUIZELIEFENG。DUOSHUSHIGONGDANWEIDUIGAOCENGJIANZHUDE 20 CENGYISHANGBUFENYANGHUDOUJIAOCHA,ZHEIZAIHUIDANQIANGDUSHISUOCEDETANHUASHENDUJIUNENGKANCHUHUNNINGTUDEYANGHUCHENGDU。


HUNNINGTUZHONGDEJIAONINGCAILIAOSHISHUIYINGXINGDE,HUNNINGTUZAICHENGXINGHOUBIXUZAICHAOSHIHUANJINGZHONGCAINENGSHUIHUA;FOUZE,HUNNINGTUZHONGDESHUIFENLIUSHIDEYUEKUAI,QIZHONGJIAONINGCAILIAODESHUIHUAJIUYUECHA,HUNNINGTUDEQIANGDUJIUHUISUNSHIYUEDA。YINCI,BIXUYANGEANZHAOGUIFANHEGUICHENGYAOQIUDUIXINJIAOZHUDEHUNNINGTUJINXINGYANGHU。DUIHUNNINGTUXIANJIAOBANDEQIANGDUWEIDADAO 1.2MPa QIAN,BUDEDIAOZHUANGCHENGKUNDEGANGJIN、JIAGUANHUOJIAOZHONGDEDAXINGGANGMOBAN。FOUZE,RONGYIYINDIAOZHUANGDECHONGJIHEZAIZAOCHENGXIANJIAOBANDELIEFENG。


5 拆模过早


360足彩YOUXIEGONGDIWEILEGANGONGQI,TOUYITIANWANSHANGJIAOZHUDEHUNNINGTU,DIERTIANZAOCHENJIUCHAICHUQIANGZHUMOBAN。DANGQIWENZHENGCHANGSHIHAIKEYI,DANSHIYUDAOJIANGWENTIANQISHI,DIERTIANZAOCHENCHAIMOJIUTAIZAO,YINWEIHUNNINGTUHAIMEIYOUZHONGNING。CHAIMOGUOZAOHUICHUXIANMOBANZHANPIHUOZHESHIYANGUJIN(SHUIPINGJIN)XIACHANSHENGSHUIPINGLIEFENG。ZHEISHIYINWEIHUNNINGTUZIZHONGXIACHENERDAOZHIDE。YINCI,ZAICHAICHUMOBANQIAN,YIDINGYAOXIANJIANCHAHUNNINGTUSHIFOUZHONGNING,YONGSHOUZHIJIAHUAHUNNINGTUDINGMIANWUSONGDONGHUIJIANGWEISHIYI,FOUZEJIUBUNENGCHAICHUMOBAN。


6 胶凝材料太少

360足彩JGJ 55-2011《PUTONGHUNNINGTUPEIHEBISHEJIGUICHENG》ZHONG 7.4.2 TIAOGUIDING:“BENGSONGHUNNINGTUJIAONINGCAILIAOYONGLIANGBUYIXIAOYU 300kg/m3”。ERYOUDEJIAOBANZHANWEILEJIANGDISHENGCHANCHENGBEN,DUIDIDENGJIHUNNINGTUPEIHEBIZHONGJIAONINGCAILIAOSHEJIWEI 280㎏/m³,GENGYOUSHENZHE,BA C15 XISHIHUNNINGTUPEIHEBIDEJIAONINGCAILIAOYESHEJIWEI 280㎏/m³,JIEGUOYICHE C15 XISHIHUNNINGTUDAOZHIDUOCIDUBENG,ZUIHOUBUDEBUDAODIAO,ZHONGXINBAJIAONINGCAILIAODIAOZHENGDAO340 kg/m3 HOUCAINENGZHENGCHANGBENGSONGSHIGONG。