Post Date: 01, Nov, 2021

Concrete mixing station in the preparation of concrete,cannot do without three substances,aggregate,powder and liquid material.The main ingredient in the liquid material is water and additives, they are not optional part,from their own independent weighing unit can be seen, this is the key part of the concrete mixing needs.And the use of water reducing agent in the admixture is in an important position,so what are the main water reducing agent? What are the characteristics?  

First of all,let’s talk about the commonly used concrete water reducing agent:sodium naphthalene sulfonate high efficiency water reducing agent,polycarboxylic acid high efficiency water reducing agent and lignin water reducing agent.

Sodium naphthalene sulfonate efficient water reducing agent:this kind of water reducing agent is chemical synthesis of non air type efficient water reducing agent,to cement particles have a strong dispersing effect,in the configuration of flow concrete,and early strong,high strength requirements of cast-in-situ concrete and pre-construction,the use of water reducing agent has a very good effect.Can improve the function of each part of concrete comprehensively.The concrete mixed by this type of water reducing agent is widely used in Bridges,DAMS,ports and docks,tunnels,electric power,water conservancy and civil construction projects and natural conservation components.

Polycarboxylic superplasticizer high efficiency water reducing agent:this is a new type of water reducing agent,known as the”ideal”high performance concrete admixture, can be mixed with a variety of admixtures into multi-functional admixtures,such as pumping agent,early strength agent,anti-seepage agent,coagulant.The water reduction rate of 1% polycarboxylic acid superplasticizer is 35%,and the early strength is increased by more than 50%.It is especially suitable for high fly ash concrete.

Lignosulphonate used as concrete water reducing agent in 0.2-0.3%,can reduce concrete mixing water consumption 10%-12%,reduce water-cement ratio,save cement about 10%,improve concrete work ability,fluidity and permeability resistance,improve concrete strength and compactness,with early strength effect,shorten setting time,improve compressive strength.At the same time reduce concrete slump loss.

What kind of admixture,according to the customer’s own engineering needs to carry out,we generally say that the engineering concrete mixing station has better adaptability,largely because the choice of admixture is more close to the project,this is why there are large projects will still invest in the construction of large mixing station and not directly buy business concrete.For example, the existing high-speed railway mixing plant is specially designed for high-speed railway projects.