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一、全自动冻融试验箱概述：
全自动冻融试验箱是混凝土检测仪器，适用于混凝土、建筑砖块、陶瓷砖、外墙砂浆及其它建材的冻融试验，制冷压缩机采用法国泰康节能、环保型涡旋式低温压缩机组，风机为无极调速，可根据环度可根据环境温度从而改变风机的转速。 整体性能稳定，全自动冻融试验箱采用优质不锈钢板，一体式结构，操作简单方便。
I. Overview of full-automatic freeze-thaw test chamber:
Full-automatic freeze-thaw test box is a concrete testing instrument, which is suitable for freeze-thaw test of concrete, building bricks, ceramic tiles, exterior wall mortar and other building materials. The refrigeration compressor uses the energy-saving and environmentally-friendly scroll type imported from Taikang, France. For low-temperature compressors, the fan is steplessly adjustable, and the speed of the fan can be changed according to the ring degree and the ambient temperature. The overall performance is stable. The full-automatic freeze-thaw test box uses high-quality stainless steel plates with an integrated structure, which is simple and convenient to operate.
二、全自动冻融试验箱符合标准：
GB/T3810-2006陶瓷砖抗冻性试验方法
GB/T2542-2003砌墙砖试验方法
GB/T4111-1997混凝土小型空心砌块试验方法
GB/T11973-1997加气混凝土抗冻性试验方法
JGJ/T70-2009砂浆抗冻性能试验方法
GB/T11973-2006蒸汽加气混凝土砌块试验方法
GB/T11968-2006混凝土小型空心砌块试验方法
GB/T241-1994岩石抗冻性试验方法
Second, the fully automatic freeze-thaw test box meets the standards:
GB / T3810-2006 Test method for frost resistance of ceramic tiles
GB / T2542-2003 Test method for masonry bricks
GB / T4111-1997 Test method for small concrete hollow blocks
GB / T11973-1997 Test method for frost resistance of aerated concrete
JGJ / T70-2009 Test method for frost resistance of mortar
GB / T11973-2006 Test method for steam aerated concrete blocks
GB / T11968-2006 Test method for small concrete hollow blocks
GB / T241-1994 Test method for frost resistance of rocks
三、全自动陶瓷砖冻融试验箱产品特点：
压缩机、加热部分、电源控制部分均采用进口件，高质量、高性能
满载运转时冻融箱内各点温度极差不超过2℃
仪表自动控制，数据曲线实时动态显示、试验数据自动存储，具有试验意外终断自动恢复功能
安装方便，占地小，低噪音
Third, the automatic ceramic tile freeze-thaw test box product features:
The compressor, heating part and power control part are all imported parts, with high quality and high performance.
The temperature difference between each point in the freeze-thaw box is not more than 2 ℃ during full load operation.
Instrument automatic control, real-time dynamic display of data curve, automatic storage of test data, and automatic recovery of unexpected test termination
Easy installation, small footprint, low noise
四、全自动冻融试验箱技术参数：
冷凝器冷却方式 | 风冷 | 风冷 |
试件数量 | 16件 | 28件 |
试件尺寸 | 100×100×400，测温件尺寸相同，中间留有测温孔 | |
冻融循环周期 | 2.5～4小时，融化时间不小于1∕4冻融周期 | |
传感器1：中温度控制 | 5～-18±2℃ | |
传感器2：液体温度控制 | 液体温度控制高温控制：18～23℃ 低温控制：-23～-18℃ | |
传感器3：对角线温度控制 | 对角线温度监测箱体内温度极差不超过2℃ | |
传感器4：二次保护温度控制 | 50℃～-30℃ | |
温度记录仪 | 数字显示无纸记录仪 | |
试件桶尺寸 | 120×120×500 | |
冻融循环介质 | －45℃防冻液 | |
冻融循环介质充注量 | 液面高于试块10－15毫米 | |
制冷机压缩机 | 全封闭 4HP | 全封闭5HP |
加热功率 | 5kW | 6kW |
zui大运行功率 | 6kW | 7kW |
供电 | 3N380V 50Hz | 3N380V 50Hz |
外形尺寸 | 1900×800×1100 | 1900×1300×1100 |
重量 | 约400kg | 约500kg |
五、全自动冻融试验箱使用方法：
试验采用水冻水融法,把符合外观要求的100×100×400的混凝土试件和测温试件放进试件桶中,用17~23℃的水浸泡4天，然后把试件桶放入冻融试验槽中，用循环的冷冻液对试件反复进行降温和升温，周期性地把试件内放的水进行冻结和融化。混凝土试件每做25次冻融循环试验，都要测量1次重量和相对动弹性模量。当相对动弹性模量下降至初始值的60％或质量损失率达5％时，即认为试件已达破坏，并以相应的冻融循环次数作为该混凝土的抗冻等级。如果试件冻融至预定的循环次数，而相对动弹性模量或质量损失率均未达到上述指标，可认为试验的混凝土抗冻性已满足设计要求。根据冻融循环次数及相应的相对动弹性模量可计算出混凝土耐久性系数，供设计选材时参考。因此，在动弹性模量，质量损失率和耐久性系数为评定指标的混凝土抗冻试验中。
Fifth, the use of automatic freeze-thaw test box:
The test adopts the water-freeze-thaw method, put the 100 × 100 × 400 concrete test pieces and temperature test pieces that meet the appearance requirements into the test piece bucket, soak it in water at 17 ~ 23 ℃ for 4 days, and then put the test piece bucket Put it into the freezing and thawing test tank, use the circulating freezing liquid to repeatedly reduce the temperature and increase the temperature of the test piece, and periodically freeze and thaw the water in the test piece. For every 25 freeze-thaw cycle tests on concrete specimens, the weight and relative dynamic elastic modulus must be 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 damage, and the corresponding freeze-thaw cycle number is used as the freeze resistance level of the concrete. If the test piece is frozen and thawed to a predetermined number of cycles, and the relative dynamic elastic modulus or mass loss rate does not reach the above indicators, the frost resistance of the tested concrete can be considered to have met the design requirements. The durability coefficient of concrete can be calculated according to the number of freeze-thaw cycles and the corresponding relative dynamic elastic modulus for reference when designing and selecting materials. Therefore, in the concrete frost resistance test in which the dynamic elastic modulus, mass loss rate and durability coefficient are evaluated.
