騰達(dá)試驗(yàn)儀器廠：

　　自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀是**涂層檢測(cè)儀器，適用于測(cè)試以水泥、聚合物粉末、合成樹脂乳液或其它材料為主要粘結(jié)劑，配以填料、助劑等組成的外墻找平膩?zhàn)娱_裂性測(cè)試。自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀依據(jù)JG/T157-2004行標(biāo)設(shè)計(jì)制造。

　　The automatic dynamic crack resistance tester is a coating testing instrument,suitable for testing cement,polymer powders,synthetic resin emulsions or other materials as the main binder,with fillers,additives,etc.Sex test.Automatic dynamic anti-cracking tester is designed and manufactured according to JG/T157-2004 standard.

　　自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀工作原理：

　　★由于建筑物的不均勻的干濕變化、熱脹冷縮、結(jié)構(gòu)沉降及設(shè)計(jì)、施工上的不完整等原因,幾乎所有建筑都不同程度地存在表面毛細(xì)裂縫、表面貫通裂縫、結(jié)構(gòu)性裂縫。

　　★外墻裂縫不僅大大降低了對(duì)建筑物外墻的保護(hù)作用，也給涂飾面的美觀造成了一定的影響。為了彌補(bǔ)上述之缺陷，在涂刷外墻乳膠漆之前，必先在墻體涂刮一層外墻膩?zhàn)?；而外墻膩?zhàn)拥馁|(zhì)量?jī)?yōu)劣，則是關(guān)鍵之關(guān)鍵。

　　★測(cè)試儀依據(jù)JG/T157-2004行標(biāo)設(shè)計(jì)制造的QDK型自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀適用于測(cè)試以水泥、聚合物粉末、合成樹脂乳液或其它材料為主要粘結(jié)劑，配以填料、助劑等組成的外墻找平膩?zhàn)印?/p>

　　★電機(jī)通過齒輪減速后拖動(dòng)頂桿作上升運(yùn)動(dòng)，刃口產(chǎn)生上頂力，使石棉水泥板在規(guī)定的區(qū)域內(nèi)逐步產(chǎn)生細(xì)微裂紋并控制裂紋緩慢擴(kuò)展，觀察膩?zhàn)訉拥拈_裂情況，以此表征膩?zhàn)拥挚够牧鸭y擴(kuò)展的能力。

　　Working principle of automatic dynamic anti-cracking tester:

　　★Due to the uneven wet and dry changes of buildings,thermal expansion and contraction,structural settlement and incomplete design and construction,almost all buildings have surface capillary cracks,surface through cracks,ａnd structural cracks to varying degrees.

　　★The cracks on the external wall not only greatly reduce the protective effect on the external wall of the building,but also affect the appearance of the painted surface to a certain extent.In order to make up for the above defects,it is necessary to apply a layer of external wall putty to the wall before painting the latex paint on the external wall;the quality of the external wall putty is the key.

　　★The tester is designed and manufactured according to the JG/T157-2004 standard QDK automatic dynamic crack resistance tester suitable for testing cement,polymer powder,synthetic resin emulsion or other materials as the main binder,with fillers,additives Wait for the composition of the exterior wall to level the putty.

　　★The motor drags the ejector rod for upward movement after decelerating through the gear,ａnd the cutting edge generates upward force,which makes the asbestos cement board gradually generate fine cracks in the specified area and controls the cracks to slowly expand.Observe the cracking of the putty layer to characterize it.The ability of a putty to resist crack propagation in a substrate.

　　QDK自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀主要技術(shù)指標(biāo)：

　　★刃口長(zhǎng)：150mm

　　★刃口夾角：30度

　　★大升程：20mm

　　★上升速率：3mm/min

　　★型框規(guī)格：200×150×2（mm）

　　★外形尺寸：200X150X2mm

　　★重量：75kg

　　Main technical indicators of QDK automatic dynamic crack resistance tester

　　★Blade length:150mm

　　★Blade angle:30 degrees

　　★L(fēng)arge lift:20mm

　　★Rising rate:3mm/min

　　★Frame specifications:200×150×2(mm)

　　★Dimensions:200X150X2mm

　　★Weight:75kg

　　QDK自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀使用試驗(yàn)方法：

　　★將型框放在200×150（mm）的石棉水泥板上。在將配制好的膩?zhàn)油抗卧谛涂騼?nèi)。

　　★將型框取下，涂刮好的石棉水泥板應(yīng)在標(biāo)準(zhǔn)環(huán)境下養(yǎng)護(hù)7d。每一樣品應(yīng)同時(shí)制備3塊試板。

　　★將養(yǎng)護(hù)好的試板卡固在本儀器的工作臺(tái)面上。啟動(dòng)電源開關(guān)后在啟動(dòng)上升開關(guān)，此時(shí)刃口緩慢上升。

　　★刃口繼續(xù)緩慢上升。此時(shí)應(yīng)注意觀察石棉板的空白區(qū)域，當(dāng)發(fā)現(xiàn)裂紋出現(xiàn)后，使用立式讀數(shù)顯微鏡觀察并隨時(shí)記錄裂紋寬度，至膩?zhàn)訉娱_裂前為止。啟動(dòng)停止開關(guān)后，刃口不再上升。

　　★記錄膩?zhàn)訉娱_裂前，石棉水泥板裂縫的A大寬度。**到0.02 mm。

　　★啟動(dòng)下降開關(guān)，使刃口退回原位。

　　★松開試板卡固螺母及壓板，取下試板。在放入另一塊試板，重復(fù)上述試驗(yàn)步驟。

　　QDK automatic dynamic crack resistance tester using test method

　　★Place the frame on an asbestos-cement board of 200×150(mm).Squeeze the putty into the frame.

　　★Remove the frame.The asbestos-cement board coated should be cured under standard environment for 7 days.Three test plates should be prepared for each sample.

　　★Fix the cured test plate on the work surface of the instrument.After the power switch is turned on,the rising switch is started,ａnd the cutting edge rises slowly at this time.

　　★The edge continues to rise slowly.At this time,pay attention to the blank area of the asbestos board.When cracks are found,use a vertical reading microscope to observe and record the crack width at any time until the putty layer cracks.After activating the stop switch,the cutting edge no longer rises.

　　★Record the large A width of the crack in the asbestos cement board before the putty layer cracks.**to 0.02 mm.

　　★Activate the lowering switch to return the cutting edge to its original position.

　　★L(fēng)oosen the retaining nut and pressure plate of the test plate and remove the test plate.After placing another test plate,repeat the above test steps.

　　QDK自動(dòng)動(dòng)態(tài)抗開裂測(cè)試儀結(jié)果判斷：

　　三塊試板中以數(shù)值較近的每塊試板的測(cè)試結(jié)果的算術(shù)平均值作為A終結(jié)果。

　　Judgment of QDK Automatic Dynamic Crack Resistance Tester

　　Among the three test plates,the arithmetic average of the test results of each test plate with the nearest value is taken as the final A result.