For cities, the fear is the flood caused by heavy rain, so the problem of drainage has become a problem we need to deal with. A good drainage cement pipe must also require good raw materials. However, many raw materials have different uses. How should we choose them? Let us listen to our introduction:
The usefulness of the raw materials of the cement drainage pipe: water is required to meet the hydration requirements of cement. Generally, the water-cement ratio of common concrete is 0.40 ~ 0.65. Excessive amount of 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. Tricalcium silicate reacts with water and is called hydration. Hydration of calcium silicate occurs, which is gel-like. 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 considered that it only played a role in forming the volume in the concrete, and had little effect on the function of the concrete.