Post Date:19,Feb,2024
Construction method features:
(1) When designing the concrete mix proportion, the composite use of high-performance water-reducing agent and air-entraining agent solves the durability requirements of concrete structures in severe cold areas;
(2) By incorporating slump-preserving components into high-performance water-reducing admixtures, the impact of high temperatures in summer on the working performance of concrete is solved;
(3) Through experimental analysis, the influence of mud content in concrete on the workability and compressive strength of concrete;
(4) By synthesizing coarse sand and fine sand in a certain proportion, the phenomenon that a single type of concrete sand cannot meet the workability of concrete is solved;
(5) The factors that affect the performance of concrete are explained, and the impact of adverse factors on the working performance of concrete is avoided during the concrete construction process.
The working principle of high-performance water reducing agent:
(1) Dispersion: The water-reducing agent is directionally adsorbed on the surface of the cement particles, making them carry the same charge to form electrostatic repulsion, which promotes the cement particles to disperse with each other, destroys the flocculation structure formed by the cement slurry, and releases part of the wrapped water. Effectively increase the fluidity of concrete mixture.
(2) Lubricant effect: The water-reducing agent has a very strong hydrophilic group, which forms a water film on the surface of the cement particles, reducing the sliding resistance between the cement particles, thereby further enhancing the fluidity of the concrete.
(3) Steric hindrance: The water-reducing agent has hydrophilic polyether side chains, which form a hydrophilic three-dimensional adsorption layer on the surface of cement particles, causing steric hindrance between cement particles, thereby ensuring that the concrete has good properties. slump.
(4) Slow-release effect of grafted copolymerized branches: During the production and preparation process of new water-reducing agents, branched chains with specific functions are added. This branched chain not only has a steric hindrance effect, but also can be used during the high hydration of cement. Polycarboxylic acids with dispersing effects are released in an alkaline environment, which improves the dispersion effect of cement particles and effectively controls the slump loss of concrete within a certain period of time.
Post time: Feb-19-2024