Concrete, referred to as “concrete (tóng)”: an artificial stone made of cementitious materials, coarse and fine aggregates, water and other admixtures in appropriate proportions. Cementitious materials are mainly composed of cement and mineral admixtures. Higher-strength concrete will add ultra-fine powders or polymers and other polymer materials with larger specific surface area and higher activity. The coarse and fine aggregates are mainly gravel and sand, mixed with chemical admixtures, and are uniformly stirred, densely formed, and cured and hardened. Thereby ensuring the quality of concrete.
Sand and stone act as a skeleton, called aggregate, and inhibit the shrinkage of cement; cement and water form cement slurry, which is wrapped around the surface of the aggregate and Fill its gaps. Before hardening, the cement slurry acts as a lubricant, giving the mixture a certain workability and facilitating construction. After the cement slurry hardens, it binds the aggregate into a solid whole.
Concrete is one of the most important contemporary civil engineering materials. It is also the most widely used and most widely used building material in the world today. The properties of concrete include the workability of the concrete mixture, concrete strength, deformation and durability. Workability, also known as workability, refers to the performance of a concrete mixture that facilitates the operation of various construction procedures under certain construction conditions to ensure uniform and dense concrete. Workability is a comprehensive technical indicator, including three main aspects: fluidity (consistency), cohesiveness and water retention. The workability of concrete mixture is the most important indicator to measure the working status. It comprehensively represents the consistency, fluidity, plasticity, anti-separation and bleeding properties of the mixture and its ease of spreading.
In order to meet the performance of concrete, high-performance concrete admixtures represented by lignin, aliphatic, and polycarboxylate water-reducing agents have emerged and have been widely developed and used. However, in use, due to reasons such as over-mixing and over-mixing, the delamination and segregation of concrete occur. The cohesion between the components of the mixture is insufficient to resist the sinking of the coarse aggregate, and the components of the concrete mixture separate from each other, resulting in The internal composition and structure are uneven. The coarse aggregate and mortar are separated from each other or the coarse aggregate is separated from the mixture as a whole. Workability is seriously affected. Cause pipe blockage, pump blockage, delamination, bleeding, etc. The internal mechanical properties, microscopic properties, structural properties, durability and long-term properties of concrete, as well as physical and chemical reactions, all have an important impact and affect the later strength growth and service life of concrete.
After concrete segregation occurs, there is no better means and methods to solve it at the construction site. Basically, it is sent back to the company to add cement, or due to the round trip time, If it is too long, it will be scrapped. It causes certain economic losses, pollutes the environment on the one hand, and wastes resources on the other. To this end, an anti-segregation conditioner and its use method are developed to solve the problem of concrete segregation caused by high moisture content of sand and gravel materials, excessive addition of admixtures, and excessive water replenishment.
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