1, material
Cement: Generally use 32.5 grade slag Portland cement. The cement should have product certification certificate and factory inspection report. After entering the site, the strength, stability and other necessary performance indicators should be sampled and retested. The quality must conform to the current national standards. "General Portland Cement" GB175-2007 and other regulations.
When there is doubt about the quality of the cement or the cement is shipped for more than three months, it must be retested before use and used as a result of the retest. Different types of cement should not be mixed.
Water: Drinking water should be used. When other water sources are used, the water quality should comply with the current standard of the standard "Concrete Mixing Water Standards" JGJ63-2006.
Sand: It is advisable to use medium and coarse sand with a hard texture and a sieve with a diameter of 5 mm. The mud content of the sand is not more than 3%. The variety and quality of sand should meet the requirements of the current national standard "Building sand GB14684-2001", JGJ52-2006 "Ordinary concrete sand, stone quality and inspection method standards". After entering the site, the sampling test is qualified according to the regulations. Concrete inspection and implementation GB/T 50081-2002 "Standards for test methods of mechanical properties of ordinary concrete".
2, machine tools
Level ruler, ruler, box ruler, construction line, rubber hammer, small cart, iron shovel, cutting machine, mortar mixer, etc.
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