The usefulness of each raw material of the cement pipe: Water is required for satisfactory cement hydration. Generally, the water-cement ratio of common concrete is 0.40 ~ 0.65. The water that exceeds the hydration demand is mainly to satisfy the workability requirements. Excessive water leaves holes in the concrete, which adversely affects the strength, density, and various durability of the concrete, such as cement pipes. Water leakage occurs due to the increase of water. Seriously affect quality.
The influence of cement on the function of concrete mainly lies in the variety and quantity of mineral components and the fineness of cement. Tricalcium silicate in cement is the primary deposit of cement clinker, with a content of about 50%, and is the primary source of cement gelability. The reaction of tricalcium silicate with water is called hydration, and hydrated calcium silicate occurs in a gel-like form. The hydrated calcium silicate gel acts as a cement for the aggregate of sand and gravel in the concrete, fills the pores therebetween, and hardens into an artificial stone.
Sand and gravel are called aggregates, also called aggregates, which account for about 70% to 80% of the volume in concrete. For a long time in the past, the aggregate was regarded as a lazy material, and it was thought that it only played a role in forming the volume in the concrete, and had little effect on the function of the concrete.