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瀝(li)青(qing)延伸度(du)試(shi)(shi)(shi)模(mo)/銅(tong)8字模(mo)廣(guang)泛應用(yong)于公路工(gong)(gong)(gong)(gong)程(cheng)施(shi)工(gong)(gong)(gong)(gong)試(shi)(shi)(shi)驗(yan)、鐵路工(gong)(gong)(gong)(gong)程(cheng)施(shi)工(gong)(gong)(gong)(gong)試(shi)(shi)(shi)驗(yan)、建(jian)筑(zhu)(zhu)工(gong)(gong)(gong)(gong)地工(gong)(gong)(gong)(gong)程(cheng)施(shi)工(gong)(gong)(gong)(gong)試(shi)(shi)(shi)驗(yan)、商品混凝土攪拌(ban)站試(shi)(shi)(shi)驗(yan)、建(jian)筑(zhu)(zhu)工(gong)(gong)(gong)(gong)程(cheng)質量監督(du)試(shi)(shi)(shi)驗(yan)，及各種大專院校(xiao)、科研機(ji)構、水利工(gong)(gong)(gong)(gong)程(cheng)等試(shi)(shi)(shi)驗(yan)，投(tou)入市場幾年內(nei)取(qu)得了*的評(ping)。

40×40×160mm水泥膠(jiao)砂試模裝模時應注意端板(ban)(ban)與(yu)(yu)(yu)隔(ge)板(ban)(ban)的(de)下(xia)平面(mian)與(yu)(yu)(yu)底座(zuo)上平面(mian)必須靠(kao)緊(jin)，不(bu)得(de)撓起(qi)，必要(yao)時可以在壓緊(jin)模型(xing)的(de)同時，用木錘輕(qing)擊各板(ban)(ban)的(de)上平面(mian)，使與(yu)(yu)(yu)底座(zuo)貼緊(jin)。

混(hun)凝土早(zao)期抗開(kai)裂試驗裝置開(kai)裂試模適(shi)用于測(ce)試混(hun)凝土試件在約束條(tiao)件下的早(zao)期抗裂性能。約束方法以尺寸為(wei)(wei)800mm×600mm×100mm的平面薄板型(xing)試件為(wei)(wei)標準(zhun)試件，混(hun)凝土試件的表面積為(wei)(wei)0.48㎡，內部(bu)置有裂縫誘(you)導發生器。

NJ-BEC型(xing)混(hun)(hun)(hun)凝(ning)土刀口(kou)約(yue)束早(zao)期抗開裂試模用于混(hun)(hun)(hun)凝(ning)土在(zai)約(yue)束狀態下(xia)早(zao)期抗裂性能(neng)測試和評價。設(she)備采用7道刀口(kou)（刀口(kou)截面形(xing)狀為(wei)直(zhi)角(jiao)等(deng)腰三(san)角(jiao)形(xing)底邊(bian)和正方形(xing)聯結而(er)成，刀口(kou)長600mm）誘(you)導受約(yue)束的(de)混(hun)(hun)(hun)凝(ning)土開裂，測試敏感(gan)度高，能(neng)反映混(hun)(hun)(hun)凝(ning)土的(de)早(zao)期抗裂性能(neng)（對(dui)絕大(da)多數混(hun)(hun)(hun)凝(ning)土，均可使其在(zai)12小時內開裂）。