The standardization of calibration and storage for test blocks directly determines the accuracy of test data and affects compliance with engineering quality acceptance requirements. To prevent testing errors and specimen failure, key specifications for routine calibration and storage of test blocks are summarized below.

1. Environmental Requirements: Calibration shall be carried out in a standard constant temperature and humidity environment. The standard temperature is 20±2℃ with relative humidity ≥95%. Avoid direct sunlight, air blowing, dust, and drastic temperature fluctuations to ensure calibration accuracy.
2. Calibration Cycle: Conduct daily verification of test equipment and standard test blocks monthly, and complete official third-party metrological calibration annually. Recalibration is mandatory immediately after equipment relocation, maintenance, or abnormal data, and only qualified equipment can be put into use.
3. Operation Specifications: Clean dust and oil on the test block surface before calibration, and eliminate defective samples with corners missing, cracks or damage. Handle samples gently during operation and record all calibration data completely for traceability.

1. Curing Environment: Standard curing test blocks shall be stored in a dedicated curing room or curing box with constant temperature of 20±2℃ and humidity ≥95%. Keep the environment clean and humid without water accumulation or corrosive gas.
2. Placement Standards: Place test blocks vertically on supports instead of directly on the ground. Reserve a 10-20mm gap between blocks and keep ≥10cm away from walls. The stacking layer shall not exceed 3 layers to prevent compression deformation and uneven curing.
3. Classified Management: Store test blocks by project part, strength grade and molding date with clear labels marked with number, specification and curing time. Isolate valid samples from waste samples strictly to avoid misuse.

Standardized calibration, storage and curing are the foundation of authentic and valid test data, as well as a key detail for project quality control. Strict implementation of standardized operations can effectively reduce test errors, ensure compliant and accurate building material test results, and guarantee the quality of engineering projects.