Test device and determination method of anti-cracking performance of early-age concrete under different temperature and humidity environmental conditions

The invention discloses a test device and a determination method of anti-cracking performance of early-age concrete under different temperature and humidity environmental conditions, wherein the test device comprises a heat and humidity preservation box body, a humidifier, a dehumidifier, a temperature increasing device, a temperature decreasing device, a temperature and humidity sensor, a temperature and humidity controller, a strain test system, a computer and an anti-cracking device, wherein the humidifier, the dehumidifier, the temperature increasing device, the temperature decreasing device, the temperature and humidity sensor and the anti-cracking device are arranged in the heat and humidity preservation box body, the humidifier, the dehumidifier, the temperature increasing device, the temperature decreasing device and the temperature and humidity sensor are connected to the temperature and humidity controller, and the temperature and humidity controller is connected with the strain test system through a computer; and the anti-cracking device comprises a baseplate, an inner steel ring arranged on the baseplate and a strain gauge arranged on the inner steel ring, and the strain gauge is also connected with the strain test system. The test device has the advantages of simple structure and convenience in dismounting, and is mainly used for determining the anti-cracking performance of the early-age concrete under the different temperature and humidity environmental conditions.