Introduce the structural division knowledge of pumping agent

Introduce the structural division knowledge of pumping agent

     Pumping is an effective means of concrete transportation. Pumping agent is an admixture that can improve the pumping performance of concrete mixture . High-performance concrete construction mostly recovers the pumping process, and a good pumping agent is also ...

     Pumping is an effective method of concrete transportation. Pumping agent is an admixture that can improve the pumping performance of concrete mixture . High-performance concrete construction mostly recovers the pumping process, and choosing a good pumping agent is also a crucial factor. . With regard to the structure of the concrete pumping agent, Xiao Bian will give you a detailed explanation.

     The pumped concrete requires a greater mobility of the concrete and maintains this function for a longer period of time. This means that the slump loss is small, the viscosity is good, the concrete does not segregate, and the water does not leak out. To do this, only It is not sufficient to mediate the concrete mix ratio and it is necessary to rely on concrete admixtures, especially concrete pumping agents. Single-component admixtures are difficult to meet the pumping concrete's performance requirements for admixtures. Commonly used pumping agents are composite products of various admixtures.

     The four steps introduce the structure of the concrete pumping agent:

     (1) Water-reducing components: Common water-reducing agents, high-efficiency water-reducing agents and high-functional water-reducing agents can all be used as the water-reducing components of the pumping agent, depending on the requirements of the project on the water reducing rate of the concrete pumping agent. Several water-reducing agents can also be used in combination when necessary. Some high-efficiency water-reducing agents and high-functional water-reducing agents themselves have the effect of controlling the slump loss of concrete and can be preferred.

     (2) Retardation components: In the formulation of the pumping agent, some of the water-reducing agents can lower the concrete-water-to-rubber ratio, but the slump loss of the concrete is fast, which is unfavorable to the pumping and is mixed in the pumping agent. Incorporating a moderate amount of retarder can save concrete slump loss and facilitate pumping. In hot weather, it is even more important. In general, slow-setting high-range water reducer is an appropriate amount of retarder and other components in various types of superplasticizers, so as to meet the requirements of standards and engineering. All types of superplasticizers have no obvious effect on the setting time of cement concrete when used in normal dosages. Sometimes, when super-dosage is used, there will be more delays in the setting and hardening time of the concrete, which will cause retardation. Dipping of superplasticizers.

     (3) Lubricant components: Lubricant components can form a lubricating film on the wall of the conveying pipe, eliminating the transportation resistance of the concrete and lowering the pumping pressure.

     (4) Air-entraining components: A suitable amount of air-entraining agent in the pumped concrete can prevent segregation and bleeding. The air-entraining agent introduces a large number of small, invariable air bubbles, and the mixture reacts like a bearing ball. These air bubbles make the sand particles move more freely and increase the plasticity of the mixture. Bubbles can also be used to supplement the sand gradation, that is, to eliminate the impact of sand gradation. Related Information Introduction: Related Information Introduction: Silver Solder   Solder