一、數(shù)顯混凝土含氣量測(cè)定儀產(chǎn)品簡(jiǎn)介：
數(shù)顯混凝土含氣量測(cè)定儀采用全鋁鑄造，防震、防水壓力表，特別適合現(xiàn)場(chǎng)操作試驗(yàn)。直接讀出所測(cè)定混凝土的含氣量，操作簡(jiǎn)單方便，數(shù)值準(zhǔn)確，減少了繁瑣的繪制含氣量與壓力表值關(guān)系的曲線(xiàn)，省時(shí)省力。
Product introduction of digital display concrete gas content measuring instrument:
Digital display concrete gas content measuring instrument adopts all-aluminum casting, shockproof and waterproof pressure gauge, especially suitable for field operation test. Directly read out the measured gas content of concrete, the operation is simple and convenient, and the value is accurate, reducing the tedious drawing of the relationship between the gas content and the pressure gauge value, saving time and effort.
二、數(shù)顯混凝土含氣量測(cè)定儀技術(shù)參數(shù)：
★容積：7L
★含氣量量程：≤10%
★粗骨料的A大粒徑：≤40mm
★A小讀數(shù)：0.1%
★設(shè)計(jì)A高壓力：4MPa
★A高工作壓力：0.4MPa
★氣密性試驗(yàn)壓力：0.4MPa
★重量：11KG
★控制器使用時(shí)間≥8小時(shí)
Second, the technical parameters of digital display concrete gas content measuring instrument:
★ Volume: 7L
★ Gas content range: ≤10%
★ A large particle size of coarse aggregate: ≤40mm
★ A small reading: 0.1%
★ Design A high pressure: 4MPa
★ A high working pressure: 0.4MPa
★ Airtightness test pressure: 0.4MPa
★ Weight: 11KG
★ Controller use time ≥8 hours
三、數(shù)顯混凝土含氣量測(cè)定儀使用方法：
★用濕布擦凈量缽與缽蓋內(nèi)表面，并使量缽呈水平放置。
★將新拌混凝土拌和物均勻的裝入量缽內(nèi)，使混凝土拌和物高出量缽少許。裝料時(shí)可用搗棒稍加插搗，裝好后，當(dāng)用振動(dòng)臺(tái)(振動(dòng)臺(tái)頻率50HZ，空載時(shí)振幅0.5±0.1mm)振實(shí)時(shí)，振動(dòng)過(guò)程中如混凝土拌和物沉落到低于內(nèi)口，則應(yīng)隨時(shí)添家混凝土拌和物，振動(dòng)至混凝土表面平整，呈現(xiàn)釉光時(shí)即停止振動(dòng)。不用振動(dòng)臺(tái)而換用搗棒搗實(shí)時(shí)，將混凝土拌和物分三層裝入，每層搗實(shí)后約為量缽高度的三分之一，插搗地層時(shí)搗棒應(yīng)貫穿整個(gè)深度。插搗上層時(shí)，搗棒應(yīng)插入下層10-20mm。每層搗實(shí)后，可把搗棒墊在量缽低部，將量缽左右交替地顛擊地面15次。
★搗時(shí)完畢后，應(yīng)立即用刮尺刮去表面多余的混凝土拌和物，表面如有凹陷應(yīng)予*，然后用鏝刀抹平，并使其表面光滑無(wú)氣泡。
★擦凈量缽和缽蓋邊緣，將O形橡膠密封圈(238×8.6)放于缽蓋邊緣的凹槽內(nèi)，蓋上缽蓋，用夾子夾緊，使之氣密良好，并用水平儀檢查水平。
★打開(kāi)水龍頭和出氣閥，用注水器從小龍頭處往量缽中注水直至水從氣閥口流出，再關(guān)緊小龍頭和出氣閥。
Third, the use of digital display concrete gas content measuring instrument:
★ Wipe the inner surface of the measuring bowl and the lid with a damp cloth, and place the measuring bowl horizontally.
★ Fill the fresh concrete mix evenly into the measuring bowl to make the concrete mix slightly higher than the measuring bowl. When loading, you can use a tamper to insert and tamp slightly. After installation, when shaking with a vibration table (50HZ frequency of vibration table, 0.5 ± 0.1mm amplitude at no load), the concrete mixture drops to below Mouth, you should add a concrete mix at home at any time, vibrate until the concrete surface is flat, and stop vibrating when the glaze appears. Instead of using a vibrating table, replace with a tamping rod, and load the concrete mixture into three layers. After each layer is tamped, it is about one-third of the height of the measuring bowl. The tamping rod should penetrate the entire depth when tamping the ground. When inserting the upper layer, the plunger should be inserted into the lower layer 10-20mm. After each layer is tamped, you can pad the tampon at the lower part of the measuring bowl and hit the ground alternately from side to side 15 times.
★ After the ramming is finished, the excess concrete mixture on the surface should be scraped off with a scraper. The surface should be filled if there is a depression, and then smoothed with a trowel to make the surface smooth and free of air bubbles.
★ Clean the edge of the measuring bowl and bowl cover, place the O-shaped rubber seal ring (238 × 8.6) in the groove on the edge of the bowl cover, cover the bowl cover, clamp with a clip to make it airtight, and check with a level meter Level.
★ Open the faucet and the air outlet valve, use a water injector to inject water from the small faucet into the measuring bowl until the water flows out of the air valve, and then close the small faucet and the air outlet valve.
四、數(shù)顯混凝土含氣量測(cè)定儀適用范圍：
《普通混凝土拌和物性能試驗(yàn)方法》GB/T50080-2016《普通混凝土外加劑應(yīng)用技術(shù)規(guī)范》GB/T50119-2003
《混凝土拌外加劑》GB/T8076-1997
《水工混凝土試驗(yàn)規(guī)程》DL/T5150-2001
《公路工程水泥及水泥混凝土試驗(yàn)規(guī)程》JTG E30-2005
Fourth, the scope of application of digital display concrete gas content measuring instrument:
"Test methods for properties of ordinary concrete mixtures" GB / T50080-2016 "Technical specifications for application of ordinary concrete admixtures" GB / T50119-2003
《Concrete admixtures》 GB / T8076-1997
"Hydraulic concrete test code" DL / T5150-2001
"Testing Rules for Highway Engineering Cement and Cement Concrete" JTG E30-2005
五、數(shù)顯混凝土含氣量測(cè)定儀操作規(guī)程：
★混凝土拌和物均勻裝入量缽，用震動(dòng)臺(tái)振搗15-30s。
★刮平混凝土，表面光滑無(wú)氣泡。
★蓋好缽蓋，向量缽內(nèi)注水至出水口流水，關(guān)緊龍頭和排氣閥。
★向量缽內(nèi)打氣加壓，表壓稱(chēng)大于0.1MPa，用微調(diào)閥準(zhǔn)確到0.1 MPa。
★按下閥門(mén)桿1-2次，測(cè)得壓力表讀數(shù)，根據(jù)標(biāo)定曲線(xiàn)測(cè)定含氣量值A(chǔ)1。
★用水壓法測(cè)出集料含氣量C。
★結(jié)果計(jì)算：A=A1-C。
以?xún)纱螠y(cè)值平均值為結(jié)果，兩次測(cè)值相差0.5%以上，找出原因重做試驗(yàn)。
Five, the digital display concrete gas content measuring instrument operating procedures:
★ Concrete mix is evenly filled into the measuring bowl and shaken with a shaking table for 15-30s.
★ Scraped concrete, smooth surface without air bubbles.
★ Cover the bowl cover. Fill the vector bowl with water to the water outlet, and close the faucet and exhaust valve.
★ Inject and pressurize in the vector bowl, the gauge pressure is greater than 0.1MPa, and it is accurate to 0.1 MPa with the fine adjustment valve.
★ Press the valve rod 1-2 times, measure the pressure gauge reading, and determine the gas content value A1 according to the calibration curve.
★ Measure the gas content C of the aggregate with water pressure method.
★ Result calculation: A = A1-C.
Take the average of the two measured values as the result, the difference between the two measured values is more than 0.5%, find out the reason and redo the test.
