GJ/T283-2012標準ZMS-T50型自密實混凝土T50坍落擴展度測定儀

坍落擴展度測定儀規格1.5*1.5米   1.0*1.0米全不銹鋼規格

新拌自(zi)密實混凝土自(zi)密實性能測試方法(fa)

A.1 自密實(shi)混(hun)凝土坍落擴展度和(he)T50試驗方(fang)法

A.1.1 本方(fang)法(fa)用(yong)于測量新拌(ban)自密實(shi)混凝土的填(tian)充性能。

A.1.2 儀器應符(fu)合下列要求：

1 混凝(ning)土坍落度筒應符合現行行業(ye)標準《混凝(ning)土坍落度儀》JG 3021相關(guan)規定。

2 底板(ban)應為(wei)硬質不(bu)(bu)吸水的(de)光滑正方(fang)形平板(ban)，邊長(chang)為(wei)1000mm，大撓度不(bu)(bu)超過3mm。在平板(ban)表面標出坍落(luo)度筒(tong)的(de)中心位置和(he)直徑分別為(wei)500mm、600mm、700mm、800mm及900mm的(de)同(tong)心圓，見圖A.1.2。

流動性自密實混凝土儀器坍落擴展度測定儀

流動性自密實混凝土儀器坍落擴展度測定儀

圖(tu)A.1.2 底板(ban)

3 鏟子、抹刀、鋼尺（精度1mm）、秒(miao)表、盛(sheng)料容器(qi)等輔助工(gong)具。

A.1.3 試驗步驟應符合下列規(gui)定：

1 潤(run)濕(shi)底(di)(di)(di)板(ban)(ban)(ban)和坍落度(du)(du)筒(tong)(tong)，在(zai)(zai)(zai)(zai)坍落度(du)(du)筒(tong)(tong)內(nei)壁和底(di)(di)(di)板(ban)(ban)(ban)上應(ying)無(wu)明水(shui)；底(di)(di)(di)板(ban)(ban)(ban)應(ying)放(fang)置在(zai)(zai)(zai)(zai)堅實(shi)的水(shui)平面(mian)上，并把(ba)筒(tong)(tong)放(fang)在(zai)(zai)(zai)(zai)底(di)(di)(di)板(ban)(ban)(ban)中心，然(ran)后用腳踩住兩邊的腳踏板(ban)(ban)(ban)，坍落度(du)(du)筒(tong)(tong)在(zai)(zai)(zai)(zai)裝料時應(ying)保持在(zai)(zai)(zai)(zai)固定的位(wei)置。

2 在(zai)新拌混凝(ning)土試(shi)樣不(bu)產生離(li)析(xi)的(de)狀態(tai)下(xia)，將(jiang)其(qi)填(tian)入坍落度筒內，利(li)用盛料(liao)容器使內盛的(de)混凝(ning)土拌合物均勻流出，不(bu)分層(ceng)一次填(tian)充(chong)至滿，自開(kai)始入料(liao)至填(tian)充(chong)結束應在(zai)1.5min內完成，且(qie)不(bu)施以任何搗實或(huo)振動。

3 用(yong)刮(gua)刀刮(gua)除坍落(luo)度筒中已填充(chong)混凝(ning)土頂部的(de)(de)余(yu)料，使其與坍落(luo)度筒的(de)(de)上緣齊平后，隨即(ji)將坍落(luo)度筒沿鉛(qian)直(zhi)方(fang)向(xiang)(xiang)勻速地向(xiang)(xiang)上提起30cm的(de)(de)高度，提起時間(jian)宜控制在(zai)3s左右。待混凝(ning)土的(de)(de)停止(zhi)流動后，測(ce)量(liang)展(zhan)開圓形的(de)(de)大直(zhi)徑(jing)(jing)，以及與大直(zhi)徑(jing)(jing)呈垂直(zhi)方(fang)向(xiang)(xiang)的(de)(de)直(zhi)徑(jing)(jing)，測(ce)定(ding)直(zhi)徑(jing)(jing)時量(liang)測(ce)一次即(ji)可。自坍落(luo)度筒提起至測(ce)量(liang)拌(ban)合物擴展(zhan)直(zhi)徑(jing)(jing)結(jie)束應控制在(zai)40s內完(wan)成。

4 測(ce)定擴展(zhan)度(du)達(da)500mm的(de)時(shi)(shi)間T50時(shi)(shi)，應自坍落度(du)筒提起時(shi)(shi)開(kai)始，至擴展(zhan)開(kai)的(de)混(hun)凝土外緣初(chu)觸(chu)平板上所繪直徑(jing)500mm的(de)圓周為(wei)止，以秒表測(ce)定時(shi)(shi)間，精確至0.1s。

A.1.4 混(hun)凝土的(de)擴展度為混(hun)凝土拌(ban)合物(wu)坍落(luo)擴展終止(zhi)后擴展面相(xiang)互垂直的(de)兩個直徑的(de)平均值，應精確至5mm。

A.1.5 觀察終坍落后的混凝土狀況，如發現粗骨料在中央堆積或終擴展后的混凝土邊緣有較多水泥漿析出，表示此混凝土拌合物抗離析性不好，應予記錄。SYD-0655乳(ru)化(hua)(hua)瀝(li)青(qing)儲(chu)(chu)(chu)存(cun)(cun)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)器(qi)(qi)目的(de)(de)(de)(de)(de)(de)(de)(de)和適用(yong)(yong)(yong)范圍(wei)：本方(fang)法(fa)適用(yong)(yong)(yong)于測定(ding)(ding)(ding)(ding)各類乳(ru)化(hua)(hua)瀝(li)青(qing)的(de)(de)(de)(de)(de)(de)(de)(de) 儲(chu)(chu)(chu)存(cun)(cun)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing).非經注明,乳(ru)液(ye)(ye)的(de)(de)(de)(de)(de)(de)(de)(de)儲(chu)(chu)(chu)存(cun)(cun)溫(wen)(wen)(wen)度(du)為(wei)(wei)乳(ru)液(ye)(ye)制造時的(de)(de)(de)(de)(de)(de)(de)(de)溫(wen)(wen)(wen)度(du),儲(chu)(chu)(chu)存(cun)(cun)時間為(wei)(wei)5d,根(gen)據需(xu)要(yao)也(ye)可(ke)為(wei)(wei)1d.儀具與材料：瀝(li)青(qing)乳(ru)液(ye)(ye)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)試(shi)(shi)(shi)(shi)(shi)(shi)管(guan)(guan)(guan)(guan)：玻璃(li)制，帶有(you)(you)上(shang)(shang)(shang)(shang)下(xia)(xia)兩個支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)口(kou)(kou)，開口(kou)(kou)部(bu)配有(you)(you)橡膠塞(sai)(sai)或木塞(sai)(sai)。試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)容(rong)(rong)器(qi)(qi)：小鋁鍋或磁蒸發皿，300mL以上(shang)(shang)(shang)(shang)。電爐(lu)或電熱板。天平：感(gan)量(liang)不大(da)于0.1g。濾網(wang)：篩孔(kong)為(wei)(wei)1.18mm。其(qi)它：溫(wen)(wen)(wen)度(du)計(ji)、氣溫(wen)(wen)(wen)計(ji)、玻璃(li)棒(bang)、溶劑(ji)、洗(xi)液(ye)(ye)等。二、主要(yao)技術(shu)指標及(ji)參數玻璃(li)試(shi)(shi)(shi)(shi)(shi)(shi)管(guan)(guan)(guan)(guan)： 有(you)(you)效(xiao)高(gao)度(du)310±10mm；標志線 250ml；試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)裝入(ru)口(kou)(kou) 32±0.1mm。三、主要(yao)結構(gou)及(ji)特點1、底座(zuo)采用(yong)(yong)(yong)10 mm鍍鉻鋼板制成，穩(wen)(wen)(wen)(wen)重可(ke)靠；2、玻璃(li)試(shi)(shi)(shi)(shi)(shi)(shi)管(guan)(guan)(guan)(guan)夾持(chi)器(qi)(qi)結構(gou)*，上(shang)(shang)(shang)(shang)下(xia)(xia)可(ke)調；3、整(zheng)體(ti)設計(ji)結構(gou)合(he)理，美(mei)觀(guan)大(da)方(fang)。四(si)、使(shi)用(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)(de)方(fang)法(fa)與步(bu)驟(zou)1、將(jiang)(jiang)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)實(shi)驗(yan)管(guan)(guan)(guan)(guan)分(fen)(fen)別(bie)用(yong)(yong)(yong)溶劑(ji)（可(ke)用(yong)(yong)(yong)汽(qi)油）、洗(xi)液(ye)(ye)和潔凈(jing)水洗(xi)凈(jing)并(bing)(bing)置(zhi)溫(wen)(wen)(wen)度(du)105°C ± 5°C 的(de)(de)(de)(de)(de)(de)(de)(de)烘箱內(nei)(nei)(nei)烘干，冷(leng)卻后(hou)用(yong)(yong)(yong)塞(sai)(sai)子塞(sai)(sai)好上(shang)(shang)(shang)(shang)下(xia)(xia)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)出口(kou)(kou)。2、將(jiang)(jiang)均勻(yun)的(de)(de)(de)(de)(de)(de)(de)(de)乳(ru)化(hua)(hua)瀝(li)青(qing)式(shi)(shi)樣(yang)約300mL，通過(guo)1.18mm濾篩過(guo)濾至試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)容(rong)(rong)器(qi)(qi)內(nei)(nei)(nei)。3、將(jiang)(jiang)過(guo)濾后(hou)的(de)(de)(de)(de)(de)(de)(de)(de)乳(ru)液(ye)(ye)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)用(yong)(yong)(yong)玻璃(li)棒(bang)攪勻(yun)，緩(huan)慢注入(ru)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)管(guan)(guan)(guan)(guan)內(nei)(nei)(nei)，使(shi)液(ye)(ye)面(mian)達到管(guan)(guan)(guan)(guan)壁上(shang)(shang)(shang)(shang)的(de)(de)(de)(de)(de)(de)(de)(de)250mL標線處。注入(ru)時應(ying)注意支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)上(shang)(shang)(shang)(shang)不得(de)附有(you)(you)氣泡(pao)。然(ran)(ran)后(hou)用(yong)(yong)(yong)塞(sai)(sai)子塞(sai)(sai)好管(guan)(guan)(guan)(guan)口(kou)(kou)。4、將(jiang)(jiang)盛樣(yang)封閉(bi)好的(de)(de)(de)(de)(de)(de)(de)(de)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)管(guan)(guan)(guan)(guan)置(zhi)于試(shi)(shi)(shi)(shi)(shi)(shi)管(guan)(guan)(guan)(guan)架(jia)上(shang)(shang)(shang)(shang)，在室溫(wen)(wen)(wen)下(xia)(xia)靜(jing)置(zhi)5晝(zhou)夜(ye)。靜(jing)置(zhi)過(guo)程中(zhong)，經常觀(guan)察乳(ru)液(ye)(ye)有(you)(you)否分(fen)(fen)層、沉(chen)淀或變色等情況，做好記錄并(bing)(bing)記錄5天內(nei)(nei)(nei)的(de)(de)(de)(de)(de)(de)(de)(de)室溫(wen)(wen)(wen)變化(hua)(hua)情況（高(gao)及(ji)低溫(wen)(wen)(wen)度(du)）。若生產的(de)(de)(de)(de)(de)(de)(de)(de)乳(ru)液(ye)(ye)計(ji)劃在5天之內(nei)(nei)(nei)就用(yong)(yong)(yong)完時，存(cun)(cun)儲(chu)(chu)(chu)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)的(de)(de)(de)(de)(de)(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)也(ye)可(ke)靜(jing)置(zhi)1個晝(zhou)夜(ye)。5、靜(jing)置(zhi)后(hou)，輕輕拔(ba)出上(shang)(shang)(shang)(shang)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)口(kou)(kou)的(de)(de)(de)(de)(de)(de)(de)(de)塞(sai)(sai)子，從上(shang)(shang)(shang)(shang)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)口(kou)(kou)流出試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)約50g接入(ru)一個蒸發殘(can)(can)留(liu)物(wu)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)容(rong)(rong)器(qi)(qi)內(nei)(nei)(nei)。再拔(ba)開下(xia)(xia)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)口(kou)(kou)的(de)(de)(de)(de)(de)(de)(de)(de)塞(sai)(sai)子，將(jiang)(jiang)下(xia)(xia)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)以上(shang)(shang)(shang)(shang)的(de)(de)(de)(de)(de)(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)全部(bu)放出，流入(ru)另一個容(rong)(rong)器(qi)(qi)內(nei)(nei)(nei)。然(ran)(ran)后(hou)充分(fen)(fen)搖勻(yun)下(xia)(xia)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)一下(xia)(xia)的(de)(de)(de)(de)(de)(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)，傾斜穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)管(guan)(guan)(guan)(guan)，將(jiang)(jiang)管(guan)(guan)(guan)(guan)內(nei)(nei)(nei)的(de)(de)(de)(de)(de)(de)(de)(de)剩余(yu)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)從下(xia)(xia)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)口(kou)(kou)流出試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)約50g，接入(ru)第三個已稱(cheng)(cheng)質(zhi)量(liang)的(de)(de)(de)(de)(de)(de)(de)(de)蒸發殘(can)(can)留(liu)物(wu)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)容(rong)(rong)器(qi)(qi)內(nei)(nei)(nei)。6、分(fen)(fen)別(bie)稱(cheng)(cheng)取上(shang)(shang)(shang)(shang)下(xia)(xia)的(de)(de)(de)(de)(de)(de)(de)(de)兩部(bu)分(fen)(fen)的(de)(de)(de)(de)(de)(de)(de)(de)質(zhi)量(liang)，準(zhun)確至0.2g，然(ran)(ran)后(hou)按T0651-1993乳(ru)化(hua)(hua)瀝(li)青(qing)蒸發殘(can)(can)留(liu)物(wu)含量(liang)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)”方(fang)法(fa)測定(ding)(ding)(ding)(ding)蒸發殘(can)(can)留(liu)物(wu)含量(liang)PA及(ji)PB 。乳(ru)化(hua)(hua)瀝(li)青(qing)的(de)(de)(de)(de)(de)(de)(de)(de)存(cun)(cun)儲(chu)(chu)(chu)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)按下(xia)(xia)面(mian)公式(shi)(shi)計(ji)算(suan)，取其(qi)值(zhi)：SS = | PA PB |式(shi)(shi)中(zhong)： SS ------試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)的(de)(de)(de)(de)(de)(de)(de)(de)存(cun)(cun)儲(chu)(chu)(chu)穩(wen)(wen)(wen)(wen)定(ding)(ding)(ding)(ding)性(xing)(xing)，；PA ------存(cun)(cun)儲(chu)(chu)(chu)后(hou)上(shang)(shang)(shang)(shang)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)部(bu)分(fen)(fen)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)蒸發殘(can)(can)留(liu)物(wu)含量(liang)，；PB ------存(cun)(cun)儲(chu)(chu)(chu)后(hou)下(xia)(xia)支(zhi)(zhi)(zhi)管(guan)(guan)(guan)(guan)部(bu)分(fen)(fen)試(shi)(shi)(shi)(shi)(shi)(shi)樣(yang)蒸發殘(can)(can)留(liu)物(wu)含量(liang)，。