全自动分体式混凝土快速冻融试验机生产厂家

混凝土快速冻融试验机（节能环保型）

产品简介：

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，本装置是必备的试验设备。可满足国内外各相关行业设计、研究、施工的需要。

符合标准：

1.GB/T50082-2024《普通混凝土长期性能和耐久性能试验方法》；

2.SL352-2020《水工混凝土试验规程》；

3.JG/T243-2009《混凝土抗冻试验设备》；

4.GB/T50081-2002《普通混凝土力学性能试验方法标准》；

5.JTG3420-2020《公路工程水泥及混凝土试验规程》；

6.ASTM/C666《混凝土快速冻融能力的标准试验方法》；

7.DL/T5150-2017《水工混凝土试验规程》；

8.DL/T5433-2009《水工碾压混凝土试验规程》；

9.JTS/T236-2019《水运工程混凝土试验规程》；

10.JGJ/T193-2009《混凝土耐久性检验评定标准》；

11.JGJ 55-2011《普通混凝土配合比设计规程》；

技术参数：

1.试件数量：28件（9组分体式）；

2.试验机为分体式结构，室内无任何噪音；

3.冷凝器冷却方式：风冷；

4.冻融温度：-30℃～ +30℃ ；

5.精度：±0.1℃；

6.温度记录仪：触摸屏控制（带USB接口），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，也可以通过触摸屏连接电脑的方式达到双向控制；

7.试件尺寸:100×100×400，测温件尺寸相同，中间留有测温孔；

8.冻融循环周期:2.0～4小时，降温1.0～2.5h，升温1.0～2.0h,不小于1∕4冻融周期；

9.传感器1：中心温度控制 5～-18℃±0.1℃；

10.传感器2：液体温度控制，高温控制：18～40℃、低温控制：-35～-18℃；

11.传感器3：对角线温度监测箱体内温度极差不超过1℃；

12.传感器4：二次保护温度控制-30℃～50℃；

13.试件桶尺寸:120×120×500；

14.冻融循环介质:－45℃防冻液；

全自动分体式混凝土快速冻融试验机生产厂家

Concrete Rapid Freeze-Thaw Testing Machine (Energy-Saving and Environment-Friendly Type)

Product Introduction

The test adopts the water freezing and thawing b. Concrete specimens (100×100×400 mm) and temperature-measuring specimens that meet appearance requirements are placed into specimen buckets, soaked in 17–23°C water for 4 days, and then the buckets are put into the freeze-thaw test tank. Circulating cryogenic fluid is used to repeatedly cool and heat the specimens, periodically freezing and thawing the water inside. For every 25 freeze-thaw cycles, the weight and relative dynamic elastic modulus of the concrete specimens are measured. When the relative dynamic elastic modulus drops to 60% of its initial value or the mass loss rate reaches 5%, the specimen is considered failed, and the corresponding number of freeze-thaw cycles is taken as the frost resistance grade of the concrete. If the specimen undergoes the predetermined number of cycles without reaching the above indicators for relative dynamic elastic modulus or mass loss rate, the concrete’s frost resistance is deemed to meet design requirements. Based on the number of freeze-thaw cycles and the corresponding relative dynamic elastic modulus, the concrete durability coefficient can be calculated for reference in material selection during design. Therefore, this device is essential for concrete frost resistance tests where dynamic elastic modulus, mass loss rate, and durability coefficient are buation indicators, meeting the needs of design, research, and construction in relevant domestic and international industries.

Compliance Standards

1. GB/T 50082-2024 Test Methods for Long-term Perbance and Durability of Ordinary Concrete;

2. SL 352-2020 Test Regulations for Hydraulic Concrete;

3. JG/T 243-2009 Testing Equipment for Concrete Frost Resistance;

4. GB/T 50081-2002 Standard Test Methods for Mechanical Properties of Ordinary Concrete;

5. JTG 3420-2020 Test Regulations for Cement and Concrete in Highway Engineering;

6. ASTM C666 Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing;

7. DL/T 5150-2017 Test Regulations for Hydraulic Concrete;

8. DL/T 5433-2009 Test Regulations for Roller Compacted Concrete in Hydraulic Engineering;

9. JTS/T 236-2019 Test Regulations for Concrete in Water Transport Engineering;

10. JGJ/T 193-2009 Standard for Inspection and Evaluation of Concrete Durability;

11. JGJ 55-2011 Design Regulations for Mix Proportions of Ordinary Concrete.

Technical Parameters

1. Number of specimens: 28 pieces (9 groups, split-type);

2. Structure: Split-type, no noise indoors;

3. Condenser cooling b: Air-cooled;

4. Freeze-thaw temperature: -30°C to +30°C;

5. Accuracy: ±0.1°C;

6. Temperature recorder: Touchscreen control (with USB interface), real-time dynamic display of data curves, automatic storage of test data, automatic recovery function for accidental test interruption, and bidirectional control via connection to a computer through the touchscreen;

7. Specimen size: 100×100×400 mm; temperature-measuring specimen has the same size with a temperature measuring hole in the middle;

8. Freeze-thaw cycle period: 2.0–4 hours (cooling: 1.0–2.5 h, heating: 1.0–2.0 h, not less than 1/4 of the cycle);

9. Sensor 1: Center temperature control, 5°C to -18°C ±0.1°C;

10. Sensor 2: Liquid temperature control (high temperature: 18–40°C; low temperature: -35–-18°C);

11. Sensor 3: Diagonal temperature monitoring, temperature difference in the tank ≤1°C;