What are the requirements for the strength grade of ordinary concrete structures
Cement is a hydraulic cementitious material, according to the provisions of the amount of water and mix well with the slurry, wrapped with fine particles all the surface and fine voids constitute mortar, mortar wrapped with coarse particles all the surface and the gap constitutes a concrete, cement and water to be combined The formation of crystalline calcium silicate, cement hydration all completed the day, that is, when the concrete to meet the expected strength of the time
If the anti-seepage, anti-freeze as a special concrete, the technical properties of ordinary concrete work (slump, moldability, adhesion, grip force, etc); strength (compressive strength, tensile strength, resistance Folding strength, splitting strength, etc) There is no quantitative index of the work in the slump, the intensity is a standardized quantitative indicators Which flexural strength, splitting strength for road and bridge engineering
Ordinary concrete composition materials: cement, clean water, sand, stone, can have a small amount of active admixture
