一，全自動(dòng)凍融試驗(yàn)箱概述：
全自動(dòng)凍融試驗(yàn)箱是專業(yè)混凝土檢測(cè)儀器，適用于混凝土、建筑磚塊、陶瓷磚、外墻砂漿及其它建材的凍融試驗(yàn)，制冷壓縮機(jī)采用法國(guó)泰康節(jié)能、環(huán)保型渦旋式低溫壓縮機(jī)組，風(fēng)機(jī)為無極調(diào)速，可根據(jù)環(huán)度可根據(jù)環(huán)境溫度從而改變風(fēng)機(jī)的轉(zhuǎn)速。 整體性能穩(wěn)定，全自動(dòng)凍融試驗(yàn)箱采用好的不銹鋼板，一體式結(jié)構(gòu)，操作簡(jiǎn)單方便。
First, the automatic freeze-thaw test box overview:
The automatic freeze-thaw test box is a professional concrete testing instrument, which is suitable for the freeze-thaw test of concrete, building bricks, ceramic tiles, exterior wall mortar and other building materials. The refrigeration compressor adopts France Taikang imported energy-saving and environment-friendly scroll-type low temperature. In the compressor unit, the fan is steplessly regulated, and the fan speed can be changed according to the ambient temperature. The overall performance is stable, and the automatic freeze-thaw test chamber is made of high-quality stainless steel plate with integrated structure, which is easy and convenient to operate. It has the characteristics of small footprint and convenient movement. It is the preferred model for building materials enterprises, colleges and universities and testing centers.
二，全自動(dòng)凍融試驗(yàn)箱符合標(biāo)準(zhǔn)：
GB/T3810-2006陶瓷磚抗凍性試驗(yàn)方法
GB/T2542-2003砌墻磚試驗(yàn)方法
GB/T4111-1997混凝土小型空心砌塊試驗(yàn)方法
GB/T11973-1997加氣混凝土抗凍性試驗(yàn)方法
JGJ/T70-2009砂漿抗凍性能試驗(yàn)方法
GB/T11973-2006蒸汽加氣混凝土砌塊試驗(yàn)方法
GB/T11968-2006混凝土小型空心砌塊試驗(yàn)方法
GB/T241-1994巖石抗凍性試驗(yàn)方法
Second, the automatic freeze-thaw test chamber meets the standards:
GB/T3810-2006 ceramic brick frost resistance test method
GB/T2542-2003 brick wall test method
GB/T4111-1997 concrete small hollow block test method
GB/T11973-1997 Aerated concrete frost resistance test method
JGJ/T70-2009 mortar anti-freezing performance test method
GB/T11973-2006 steam aerated concrete block test method
GB/T11968-2006 concrete small hollow block test method
GB/T241-1994 rock frost resistance test method
三，全自動(dòng)陶瓷磚凍融試驗(yàn)箱產(chǎn)品特點(diǎn)：
壓縮機(jī)、加熱部分、電源控制部分均采用進(jìn)口件，高質(zhì)量、高性能
滿載運(yùn)轉(zhuǎn)時(shí)凍融箱內(nèi)各點(diǎn)溫度極差不超過2℃
儀表自動(dòng)控制，數(shù)據(jù)曲線實(shí)時(shí)動(dòng)態(tài)顯示、試驗(yàn)數(shù)據(jù)自動(dòng)存儲(chǔ)，具有試驗(yàn)意外終斷自動(dòng)恢復(fù)功能
安裝方便，占地小，低噪音
Third, automatic ceramic tile freeze-thaw test chamber Features:
The compressor, heating part and power control part are all imported parts, high quality and high performance.
The temperature difference between the various points in the freeze-thaw box does not exceed 2 °C when fully loaded
Automatic meter control, real-time dynamic display of data curve, automatic storage of test data, automatic recovery of test accidental termination
Easy installation, small footprint and low noise
四，全自動(dòng)凍融試驗(yàn)箱技術(shù)參數(shù)：
冷凝器冷卻方式 | 風(fēng)冷 | 風(fēng)冷 |
試件數(shù)量 | 16件 | 28件 |
試件尺寸 | 100×100×400，測(cè)溫件尺寸相同，中間留有測(cè)溫孔 | |
凍融循環(huán)周期 | 2.5～4小時(shí)，融化時(shí)間不小于1∕4凍融周期 | |
傳感器1：中溫度控制 | 5～-18±2℃ | |
傳感器2：液體溫度控制 | 液體溫度控制高溫控制：18～23℃ 低溫控制：-23～-18℃ | |
傳感器3：對(duì)角線溫度控制 | 對(duì)角線溫度監(jiān)測(cè)箱體內(nèi)溫度極差不超過2℃ | |
傳感器4：二次保護(hù)溫度控制 | 50℃～-30℃ | |
溫度記錄儀 | 數(shù)字顯示無紙記錄儀 | |
試件桶尺寸 | 120×120×500 | |
凍融循環(huán)介質(zhì) | －45℃防凍液 | |
凍融循環(huán)介質(zhì)充注量 | 液面高于試塊10－15毫米 | |
制冷機(jī)壓縮機(jī) | 全封閉 4HP | 全封閉5HP |
加熱功率 | 5kW | 6kW |
zui大運(yùn)行功率 | 6kW | 7kW |
供電 | 3N380V 50Hz | 3N380V 50Hz |
外形尺寸 | 1900×800×1100 | 1900×1300×1100 |
重量 | 約400kg | 約500kg |
五，全自動(dòng)凍融試驗(yàn)箱使用方法：
試驗(yàn)采用水凍水融法,把符合外觀要求的100×100×400的混凝土試件和測(cè)溫試件放進(jìn)試件桶中,用17~23℃的水浸泡4天，然后把試件桶放入凍融試驗(yàn)槽中，用循環(huán)的冷凍液對(duì)試件反復(fù)進(jìn)行降溫和升溫，周期性地把試件內(nèi)放的水進(jìn)行凍結(jié)和融化。混凝土試件每做25次凍融循環(huán)試驗(yàn)，都要測(cè)量1次重量和相對(duì)動(dòng)彈性模量。當(dāng)相對(duì)動(dòng)彈性模量下降至初始值的60％或質(zhì)量損失率達(dá)5％時(shí)，即認(rèn)為試件已達(dá)破壞，并以相應(yīng)的凍融循環(huán)次數(shù)作為該混凝土的抗凍等級(jí)。如果試件凍融至預(yù)定的循環(huán)次數(shù)，而相對(duì)動(dòng)彈性模量或質(zhì)量損失率均未達(dá)到上述指標(biāo)，可認(rèn)為試驗(yàn)的混凝土抗凍性已滿足設(shè)計(jì)要求。根據(jù)凍融循環(huán)次數(shù)及相應(yīng)的相對(duì)動(dòng)彈性模量可計(jì)算出混凝土耐久性系數(shù)，供設(shè)計(jì)選材時(shí)參考。因此，在動(dòng)彈性模量，質(zhì)量損失率和耐久性系數(shù)為評(píng)定指標(biāo)的混凝土抗凍試驗(yàn)中。
Fifth, the use of automatic freeze-thaw test chamber:
The test uses the water-frozen water-melting method, put 100×100×400 concrete specimens and temperature-measuring specimens that meet the appearance requirements into the specimen bucket, soak them in water at 17~23°C for 4 days, then put the specimen bucket The sample is placed in a freeze-thaw test tank, and the test piece is repeatedly cooled and warmed by the circulating freezing liquid, and the water placed in the test piece is periodically frozen and melted. For every 25 freeze-thaw cycles of concrete specimens, the weight and relative dynamic modulus are measured once. When the relative dynamic elastic modulus drops to 60% of the initial value or the mass loss rate reaches 5%, it is considered that the test piece has reached the damage, and the corresponding freeze-thaw cycle number is used as the anti-freeze level of the concrete. If the test piece freezes and freezes to the predetermined number of cycles, and the relative dynamic elastic modulus or mass loss rate does not reach the above index, it can be considered that the tested concrete frost resistance has met the design requirements. According to the number of freeze-thaw cycles and the corresponding relative dynamic elastic modulus, the concrete durability coefficient can be calculated for reference when designing materials. Therefore, in the concrete antifreeze test in which the dynamic elastic modulus, the mass loss rate and the durability coefficient are the evaluation indexes, the device is an essential test device. It can meet the needs of design, research and construction of various related industries at home and abroad.
