【問題】施工的質量缺陷與預控措施?
【解答】清水混凝(ning)土(tu)(tu)施(shi)工(gong)是一項非常細致的(de)(de)工(gong)作,比一般混凝(ning)土(tu)(tu)施(shi)工(gong)要求嚴(yan)(yan)格。為此(ci),必須通(tong)過嚴(yan)(yan)格的(de)(de)質量控(kong)制(zhi),精(jing)心(xin)的(de)(de)配合比設計(ji)和嚴(yan)(yan)格的(de)(de)施(shi)工(gong)工(gong)藝,每(mei)一道工(gong)序都必須嚴(yan)(yan)格控(kong)制(zhi)把關(guan),加強施(shi)工(gong)過程(cheng)控(kong)制(zhi),嚴(yan)(yan)格執(zhi)行清水混凝(ning)土(tu)(tu)施(shi)工(gong)前制(zhi)定的(de)(de)各項質量控(kong)制(zhi)措施(shi),只有(you)這樣(yang)才能確保清水混凝(ning)土(tu)(tu)達到預(yu)期的(de)(de)效果。清水混凝(ning)土(tu)(tu)的(de)(de)結構設計(ji)與施(shi)工(gong),還有(you)待理論研(yan)究和實踐(jian)應(ying)用,并持續發展(zhan),以趕上(shang)國際先進水平。
1.清(qing)水(shui)(shui)混(hun)(hun)凝土(tu)質(zhi)量(liang)缺陷問(wen)題分(fen)析(xi)常見(jian)的(de)(de)清(qing)水(shui)(shui)混(hun)(hun)凝土(tu)質(zhi)量(liang)缺陷有(you):墻體(ti)錯臺;陰角模(mo)與大墻面(mian)錯臺;螺(luo)桿(gan)孔(kong)跑(pao)漿,塑料套管整體(ti)強度不夠;陽角跑(pao)漿;陰角處部分(fen)螺(luo)桿(gan)擰緊不好造成(cheng)模(mo)板(ban)變(bian)形(xing),留有(you)模(mo)板(ban)縫隙;豎向模(mo)板(ban)間有(you)錯臺現象(xiang);窗臺有(you)跑(pao)漿現象(xiang);大墻面(mian)平整度超(chao)標;表(biao)面(mian)釘眼痕跡明顯,有(you)損混(hun)(hun)凝土(tu)外觀;墻底有(you)爛根現象(xiang)、有(you)輕微色差、氣(qi)泡(pao)數量(liang)超(chao)標。實踐告訴我們,每(mei)一種清(qing)水(shui)(shui)混(hun)(hun)凝土(tu)表(biao)觀質(zhi)量(liang)缺陷都是由多種可能原因造成(cheng)的(de)(de)。為此,只有(you)從清(qing)水(shui)(shui)混(hun)(hun)凝土(tu)的(de)(de)各個施工(gong)過程入(ru)手,詳(xiang)細分(fen)析(xi)每(mei)個施工(gong)步驟可能產生(sheng)的(de)(de)質(zhi)量(liang)隱(yin)患(huan),才能有(you)針對地對鋼筋綁(bang)扎與焊接、混(hun)(hun)凝土(tu)原材料及配合比、混(hun)(hun)凝土(tu)澆筑、養護、模(mo)板(ban)材料、模(mo)板(ban)體(ti)系的(de)(de)設計、制作與安裝和修補等全過程采取有(you)效措施,以保證(zheng)清(qing)水(shui)(shui)混(hun)(hun)凝土(tu)的(de)(de)裝飾(shi)效果(guo)。
2.1混(hun)(hun)(hun)凝(ning)土(tu)(tu)引(yin)起的(de)(de)(de)質量(liang)(liang)(liang)缺(que)陷2.1 清水(shui)(shui)(shui)混(hun)(hun)(hun)凝(ning)土(tu)(tu)的(de)(de)(de)配制(zhi)水(shui)(shui)(shui)泥(ni)及(ji)外加劑不(bu)(bu)(bu)(bu)能(neng)保(bao)證定(ding)牌(pai)號(hao)、品種,定(ding)生(sheng)(sheng)產地(di)點,定(ding)計劃供應,故配置的(de)(de)(de)混(hun)(hun)(hun)凝(ning)土(tu)(tu)不(bu)(bu)(bu)(bu)具有良(liang)好(hao)的(de)(de)(de)一(yi)致性,不(bu)(bu)(bu)(bu)能(neng)滿(man)足外觀色(se)澤(ze)(ze)一(yi)致的(de)(de)(de)要求。水(shui)(shui)(shui)泥(ni)含堿量(liang)(liang)(liang)過(guo)大(da)而導致的(de)(de)(de)堿一(yi)集料(liao)(liao)反應,也(ye)會(hui)(hui)在混(hun)(hun)(hun)凝(ning)土(tu)(tu)表面產生(sheng)(sheng)色(se)差(cha)。當(dang)粗細(xi)骨(gu)(gu)料(liao)(liao)含泥(ni)量(liang)(liang)(liang)過(guo)大(da)或帶有雜物以及(ji)骨(gu)(gu)料(liao)(liao)的(de)(de)(de)色(se)澤(ze)(ze)不(bu)(bu)(bu)(bu)一(yi)致,也(ye)會(hui)(hui)造成(cheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)質量(liang)(liang)(liang)色(se)澤(ze)(ze)的(de)(de)(de)不(bu)(bu)(bu)(bu)均勻(yun)。當(dang)粗骨(gu)(gu)料(liao)(liao)的(de)(de)(de)粒徑(jing)大(da)于構件混(hun)(hun)(hun)凝(ning)土(tu)(tu)最大(da)粒徑(jing)要求時會(hui)(hui)引(yin)起澆筑(zhu)困難,造成(cheng)露筋、蜂(feng)窩麻面。同(tong)時針(zhen)片狀粗骨(gu)(gu)料(liao)(liao)含量(liang)(liang)(liang)過(guo)多。也(ye)會(hui)(hui)形成(cheng)清水(shui)(shui)(shui)混(hun)(hun)(hun)凝(ning)土(tu)(tu)表面形成(cheng)粗骨(gu)(gu)料(liao)(liao)透明層。拌制(zhi)混(hun)(hun)(hun)凝(ning)土(tu)(tu)所(suo)用的(de)(de)(de)水(shui)(shui)(shui),可以使(shi)(shi)用飲(yin)用水(shui)(shui)(shui)和(he)河水(shui)(shui)(shui)。但(dan)是(shi)假如(ru)同(tong)一(yi)工程所(suo)使(shi)(shi)用的(de)(de)(de)河水(shui)(shui)(shui)不(bu)(bu)(bu)(bu)是(shi)同(tong)一(yi)水(shui)(shui)(shui)源(yuan)。也(ye)會(hui)(hui)造成(cheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)產生(sheng)(sheng)色(se)差(cha)。粉(fen)(fen)煤灰(hui)能(neng)夠很(hen)好(hao)地(di)增加混(hun)(hun)(hun)凝(ning)土(tu)(tu)的(de)(de)(de)表面光潔度,但(dan)是(shi)對混(hun)(hun)(hun)凝(ning)土(tu)(tu)的(de)(de)(de)色(se)澤(ze)(ze)影響非常顯著。當(dang)不(bu)(bu)(bu)(bu)能(neng)保(bao)證粉(fen)(fen)煤灰(hui)的(de)(de)(de)色(se)澤(ze)(ze)一(yi)致性以及(ji)細(xi)度要求時,也(ye)會(hui)(hui)造成(cheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)產生(sheng)(sheng)色(se)差(cha)。
2.2 的(de)澆(jiao)(jiao)筑及振搗(dao)澆(jiao)(jiao)筑時(shi)如(ru)果(guo)傾落(luo)的(de)自(zi)由高(gao)度(du)超過(guo)2m,會發(fa)生(sheng)(sheng)混(hun)凝土離析(xi),從而(er)導致(zhi)清水混(hun)凝土表面發(fa)生(sheng)(sheng)分層(ceng)、色澤不(bu)均(jun)勻的(de)現(xian)象(xiang)。因此,當自(zi)由下落(luo)高(gao)度(du)較大(da)時(shi)。應使用(yong)溜槽(cao)或串(chuan)筒。當混(hun)凝土厚(hou)度(du)較大(da),振搗(dao)機械的(de)性能(neng)(neng)(neng)達不(bu)到影響(xiang)深度(du),或者(zhe)混(hun)凝土厚(hou)度(du)不(bu)是(shi)很大(da)。但是(shi)配筋密實影響(xiang)振搗(dao)時(shi)。如(ru)果(guo)不(bu)進行分層(ceng)澆(jiao)(jiao)筑,就不(bu)能(neng)(neng)(neng)保證混(hun)凝土振搗(dao)密實.清水混(hun)凝土拆模后很可能(neng)(neng)(neng)會出現(xian)蜂窩、麻面等質量(liang)缺(que)陷(xian)。
2.3 清水(shui)混(hun)凝土(tu)(tu)的(de)(de)養護(hu)清水(shui)混(hun)凝土(tu)(tu)構筑物的(de)(de)側模(mo)應在48h后(hou)拆(chai)除(chu),如果(guo)拆(chai)模(mo)過(guo)遲,會(hui)造(zao)成混(hun)凝土(tu)(tu)養護(hu)不(bu)及時,混(hun)凝土(tu)(tu)會(hui)因(yin)水(shui)化熱過(guo)大而產生表(biao)面裂(lie)紋。養護(hu)時問一般不(bu)得(de)(de)少(shao)于14d.若養護(hu)時間過(guo)短,混(hun)凝土(tu)(tu)成型后(hou)會(hui)由于曝(pu)曬、風(feng)吹、干燥(zao)寒(han)冷等(deng)自然影(ying)響,出(chu)現不(bu)正(zheng)常的(de)(de)收縮(suo)、裂(lie)縫(feng)、崩落等(deng)現象。為避免形成清水(shui)混(hun)凝土(tu)(tu)表(biao)面色差,模(mo)板拆(chai)除(chu)后(hou)其(qi)表(biao)面養護(hu)的(de)(de)遮蓋物不(bu)得(de)(de)直接(jie)用草(cao)墊或草(cao)包(bao)鋪蓋,以(yi)免造(zao)成永久性黃顏色污染(ran),應采用塑料薄(bo)膜(mo)嚴密(mi)覆(fu)蓋養護(hu)。
3.1清(qing)水(shui)混凝(ning)土(tu)常(chang)見質(zhi)量缺(que)陷的治理方法3.1 根(gen)部(bu)(bu)漏漿防(fang)治與(yu)消除(chu)方法:柱(zhu)(zhu)模(mo)(mo)板(ban)(ban)支(zhi)(zhi)設(she)前應對(dui)柱(zhu)(zhu)根(gen)部(bu)(bu)模(mo)(mo)板(ban)(ban)支(zhi)(zhi)設(she)處用1:2水(shui)泥砂(sha)漿找平,找平層(ceng)要用水(shui)平尺進行檢查,確保(bao)水(shui)平平整;柱(zhu)(zhu)模(mo)(mo)板(ban)(ban)下口全部(bu)(bu)過(guo)手推刨,確保(bao)下口方正平直,柱(zhu)(zhu)模(mo)(mo)板(ban)(ban)底(di)部(bu)(bu)還(huan)要粘(zhan)貼一道雙面海綿膠(jiao)(jiao)帶(dai),以利(li)模(mo)(mo)板(ban)(ban)與(yu)找平層(ceng)擠壓嚴密(mi);柱(zhu)(zhu)根(gen)部(bu)(bu)應留設(she)排(pai)水(shui)孔,模(mo)(mo)板(ban)(ban)內沖洗水(shui)利(li)于排(pai)除(chu),澆(jiao)筑(zhu)混凝(ning)土(tu)前要用砂(sha)漿將排(pai)水(shui)孔與(yu)柱(zhu)(zhu)根(gen)部(bu)(bu)模(mo)(mo)板(ban)(ban)周圍封堵牢(lao)固;對(dui)于柱(zhu)(zhu)與(yu)柱(zhu)(zhu)接(jie)頭處,可(ke)在下層(ceng)柱(zhu)(zhu)面上、模(mo)(mo)板(ban)(ban)根(gen)部(bu)(bu)部(bu)(bu)位水(shui)平粘(zhan)貼一道一定厚(hou)度的海面膠(jiao)(jiao)帶(dai),支(zhi)(zhi)設(she)加固模(mo)(mo)板(ban)(ban)時,可(ke)保(bao)證模(mo)(mo)板(ban)(ban)底(di)部(bu)(bu)與(yu)柱(zhu)(zhu)面擠壓緊(jin)密(mi);澆(jiao)筑(zhu)混凝(ning)土(tu)前必須接(jie)漿處理,即在柱(zhu)(zhu)根(gen)部(bu)(bu)均勻(yun)澆(jiao)筑(zhu)一層(ceng)125px-250px厚(hou)的同配合比的水(shui)泥砂(sha)漿。
3.2 模(mo)(mo)板(ban)(ban)(ban)接(jie)縫(feng)明顯與混(hun)凝(ning)土(tu)(tu)錯臺防治(zhi)與消除(chu)方法:選用(yong)(yong)(yong)(yong)規格、厚度(du)一(yi)(yi)致的(de)木(mu)膠合(he)(he)板(ban)(ban)(ban)、方木(mu)與pvc內貼(tie)板(ban)(ban)(ban),膠合(he)(he)板(ban)(ban)(ban)可采用(yong)(yong)(yong)(yong)酚醛覆膜木(mu)膠合(he)(he)板(ban)(ban)(ban)模(mo)(mo)板(ban)(ban)(ban),該模(mo)(mo)板(ban)(ban)(ban)選用(yong)(yong)(yong)(yong)優質主體材料(liao),表面(mian)(mian)用(yong)(yong)(yong)(yong)防水性(xing)強(qiang)(qiang)(qiang)的(de)酚醛樹(shu)脂浸漬(zi)紙,光潔平整,強(qiang)(qiang)(qiang)度(du)高,重量(liang)輕(qing),防水性(xing)強(qiang)(qiang)(qiang),特別適用(yong)(yong)(yong)(yong)清水混(hun)凝(ning)土(tu)(tu)工程,確(que)保(bao)加固用(yong)(yong)(yong)(yong)方木(mu)尺寸精確(que)統一(yi)(yi),模(mo)(mo)板(ban)(ban)(ban)和pvc內貼(tie)板(ban)(ban)(ban)厚度(du)使用(yong)(yong)(yong)(yong)前(qian)要仔細檢查(cha),確(que)保(bao)將厚度(du)一(yi)(yi)致的(de)材料(liao)用(yong)(yong)(yong)(yong)到同(tong)一(yi)(yi)構(gou)件中;模(mo)(mo)板(ban)(ban)(ban)組合(he)(he)拼(pin)裝時(shi),嚴禁模(mo)(mo)板(ban)(ban)(ban)縫(feng)、pvc內貼(tie)板(ban)(ban)(ban)縫(feng)與方木(mu)接(jie)合(he)(he)縫(feng)三縫(feng)合(he)(he)一(yi)(yi); pvc內貼(tie)板(ban)(ban)(ban)縫(feng)間要用(yong)(yong)(yong)(yong)膩(ni)子補齊后粘貼(tie)50px寬(kuan)透明膠帶(dai)紙;大(da)組合(he)(he)模(mo)(mo)板(ban)(ban)(ban)接(jie)頭(tou)處應將模(mo)(mo)板(ban)(ban)(ban)邊緣用(yong)(yong)(yong)(yong)手工刨推(tui)平,然后貼(tie)上雙面(mian)(mian)膠帶(dai),保(bao)證對齊后再進(jin)行拼(pin)接(jie);加固用(yong)(yong)(yong)(yong)鋼管箍或槽鋼箍嚴禁撓(nao)曲、變(bian)形,且必(bi)須具備足夠的(de)強(qiang)(qiang)(qiang)度(du)和剛度(du),確(que)保(bao)清水混(hun)凝(ning)土(tu)(tu)表面(mian)(mian)平整。
3.3 柱梁線(xian)(xian)(xian)(xian)角(jiao)漏漿及起(qi)砂與(yu)(yu)(yu)不順(shun)(shun)(shun)直(zhi)防(fang)治與(yu)(yu)(yu)消除方法:木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)要(yao)(yao)(yao)確(que)保規格一(yi)致(zhi)(zhi),線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)順(shun)(shun)(shun)暢,進廠后使用(yong)前,要(yao)(yao)(yao)統一(yi)逐(zhu)根(gen)挑(tiao)選,撓曲變形及開裂者(zhe)(zhe)嚴禁使用(yong),木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)上(shang)刷膠(jiao)(jiao)(jiao)及膠(jiao)(jiao)(jiao)帶紙粘(zhan)(zhan)貼(tie)要(yao)(yao)(yao)專人(ren)(ren)施工,專人(ren)(ren)負責,木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)上(shang)粘(zhan)(zhan)貼(tie)膠(jiao)(jiao)(jiao)帶紙要(yao)(yao)(yao)寬(kuan)些,每邊寬(kuan)出木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)邊50px,要(yao)(yao)(yao)雙(shuang)面(mian)收頭,若發現(xian)有膠(jiao)(jiao)(jiao)帶紙鼓泡現(xian)象(xiang),用(yong)針刺破(po)以排出氣體,木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)安(an)裝(zhuang)(zhuang)時(shi)(shi)與(yu)(yu)(yu)模板(ban)(ban)(ban)接觸部位要(yao)(yao)(yao)粘(zhan)(zhan)貼(tie)雙(shuang)面(mian)海(hai)綿膠(jiao)(jiao)(jiao)帶,以便安(an)裝(zhuang)(zhuang)時(shi)(shi)與(yu)(yu)(yu)模板(ban)(ban)(ban)擠緊擠密,木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)上(shang)海(hai)綿膠(jiao)(jiao)(jiao)帶與(yu)(yu)(yu)木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)邊要(yao)(yao)(yao)貼(tie)齊,禁止(zhi)出現(xian)兩(liang)者(zhe)(zhe)間(jian)里出外(wai)進的情況(kuang);木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)往模板(ban)(ban)(ban)上(shang)釘時(shi)(shi),必須拉(la)出木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)邊線(xian)(xian)(xian)(xian),逐(zhu)根(gen)挑(tiao)選,確(que)保把規格一(yi)致(zhi)(zhi)的木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)釘在同(tong)一(yi)構(gou)件上(shang),木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)一(yi)般固定在小面(mian)模板(ban)(ban)(ban)上(shang),釘子(zi)間(jian)距為200mm-500mm,以保證木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)在支(zhi)設大面(mian)模板(ban)(ban)(ban)時(shi)(shi)不變形,柱梁模板(ban)(ban)(ban)角(jiao)部pvc板(ban)(ban)(ban)兩(liang)邊都要(yao)(yao)(yao)留出lcm寬(kuan)空地(di),防(fang)止(zhi)安(an)裝(zhuang)(zhuang)木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)時(shi)(shi),釘子(zi)將(jiang)pvc板(ban)(ban)(ban)釘裂,木(mu)(mu)線(xian)(xian)(xian)(xian)條(tiao)(tiao)(tiao)上(shang)的釘帽處順(shun)(shun)(shun)直(zhi)貼(tie)整條(tiao)(tiao)(tiao)窄膠(jiao)(jiao)(jiao)帶。
3.4 混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)表面氣(qi)(qi)(qi)泡防治與消(xiao)除(chu)方法(fa):混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)應(ying)(ying)(ying)分(fen)層(ceng)(ceng)澆(jiao)筑,采(cai)用(yong)測桿(gan)檢(jian)查分(fen)層(ceng)(ceng)厚(hou)度(du)(du),如5ocm一(yi)層(ceng)(ceng),測桿(gan)每(mei)隔1250px刷紅藍(lan)標志(zhi)線(xian),測量(liang)時(shi)(shi)(shi)直立在混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)表面上,以外測桿(gan)的長度(du)(du)來檢(jian)驗分(fen)層(ceng)(ceng)厚(hou)度(du)(du),并配備檢(jian)查、澆(jiao)筑用(yong)照明燈具(ju),分(fen)層(ceng)(ceng)厚(hou)度(du)(du)應(ying)(ying)(ying)滿足要(yao)求,待第1層(ceng)(ceng)混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)振搗(dao)(dao)(dao)密實(shi),直至混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)表面呈水(shui)平(ping)不(bu)(bu)再顯著下沉并產(chan)生氣(qi)(qi)(qi)泡為止,再澆(jiao)筑第2層(ceng)(ceng)混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu),在澆(jiao)筑上層(ceng)(ceng)混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)時(shi)(shi)(shi),應(ying)(ying)(ying)插(cha)入下層(ceng)(ceng)混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)125px左(zuo)(zuo)右(you),以消(xiao)除(chu)兩(liang)層(ceng)(ceng)之間(jian)的接縫;混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)振搗(dao)(dao)(dao)應(ying)(ying)(ying)插(cha)點均勻,快插(cha)慢(man)拔(ba),每(mei)一(yi)插(cha)點要(yao)掌握(wo)好振搗(dao)(dao)(dao)時(shi)(shi)(shi)間(jian),一(yi)般(ban)振搗(dao)(dao)(dao)時(shi)(shi)(shi)間(jian)20s~30s,過短不(bu)(bu)利(li)于(yu)搗(dao)(dao)(dao)實(shi)和(he)氣(qi)(qi)(qi)泡排(pai)出(chu),過長可(ke)能造成混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)分(fen)層(ceng)(ceng)離(li)析現象(xiang),致使混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)表面顏色不(bu)(bu)一(yi)致;混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)振搗(dao)(dao)(dao)時(shi)(shi)(shi),振動(dong)棒(bang)若緊靠模板振搗(dao)(dao)(dao),則(ze)很可(ke)能將氣(qi)(qi)(qi)泡趕(gan)至模板邊,反而不(bu)(bu)利(li)于(yu)氣(qi)(qi)(qi)泡排(pai)出(chu),故振動(dong)棒(bang)應(ying)(ying)(ying)與模板保持150mm~200mm左(zuo)(zuo)右(you)間(jian)隙,以利(li)于(yu)氣(qi)(qi)(qi)泡排(pai)出(chu);混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)的坍(tan)落度(du)(du)、和(he)易(yi)性和(he)減(jian)水(shui)劑的摻(chan)入都(dou)對混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)振搗(dao)(dao)(dao)產(chan)生一(yi)定(ding)的影響,我們可(ke)選用(yong)合理(li)的外加(jia)劑,適(shi)當增加(jia)混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)攪拌時(shi)(shi)(shi)間(jian),適(shi)當增大坍(tan)落度(du)(du)等方法(fa),在利(li)于(yu)混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)振搗(dao)(dao)(dao)的同時(shi)(shi)(shi),減(jian)少混(hun)(hun)(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)氣(qi)(qi)(qi)泡的產(chan)生。
4.結束語(yu)是指一次成型,不做任何外裝飾,直(zhi)接采用現(xian)澆混(hun)凝土(tu)自然色作為(wei)飾面,因此(ci)要求混(hun)凝土(tu)表面平整光滑,色澤(ze)均勻,元(yuan)碰損(sun)和污(wu)染,對(dui)拉螺栓及施工縫的(de)設置整齊(qi)美觀,不允許(xu)出現(xian)普(pu)通混(hun)凝土(tu)的(de)質量通病。的施工質(zhi)量(liang)主要取決于模(mo)板工程(cheng)、鋼筋工程(cheng)及混凝(ning)土(tu)工程(cheng)等關鍵環節,本文對清(qing)水混凝(ning)土(tu)施工質(zhi)量(liang)控制措施及其要點作了(le)粗(cu)淺(qian)探討。
上(shang)一篇:清水混凝土的成品保護
下(xia)一(yi)篇:沒有(you)了(le)!
所屬類別: 公司動態
該資訊的關鍵詞為:清水混(hun)凝土(tu)(tu)(tu),仿清水混(hun)凝土(tu)(tu)(tu),清水混(hun)凝土(tu)(tu)(tu)保護劑(ji),仿清水混(hun)凝土(tu)(tu)(tu)漆,混(hun)凝土(tu)(tu)(tu)修補,北(bei)京宏冀建材有(you)限(xian)公司(si)......