1. Aggregation: sampling and testing of specific coarse aggregate. Coarse aggregate must be made of gravel or crushed river pebbles, with appropriate gradient direction, excellent material and symmetrical material. Roughly speaking, the index value must comply with relevant specifications, policies and regulations. It is forbidden to manipulate the sand slurry composition and sand slurry composition, immediately detect them, and put the detected defects into the 4-party self feeding concrete mixer.
2. Concrete: concrete shall be sampled according to regulations. Each batch of concrete must be tested for compliance with the specifications and temperature. If you have questions about quality, do not enter the warehouse and test other index values again. Strictly prohibit the application of qualified concrete. It is forbidden to immediately apply unheated high-temperature concrete in new projects.
3. Mineral compounds: test according to relevant specifications and models. The laboratory must solve the transformation of mineral compound quality. After mineral compounds enter the site, be sure to carry out water consumption, ignition damage and particle size detection. Be able to store and record tested goods for basic testing. Compare the results to clarify the quality fluctuation and ensure the quality of new projects.
4. Water reducing agent: regularly check and detect the water reducing agent when entering the site. Check the following new items in the mixed packaging. Product name, model and specification, net or net total number, manufacturer's name, manufacturing time, processing plant serial number.