A kind of concrete admixture and preparation method thereof

Abstract

The invention discloses a concrete admixture and a preparation method thereof, belonging to the technical field of pipe pile concrete. 2.5-3 parts of the oxidizing agent in the redox initiator, 0.4-0.8 parts of the reducing agent in the redox initiator, and 3.5-3.8 parts of the chain transfer agent are obtained through polymerization reaction. Preparation of modified composite powder: a, roast the composite powder at 430-450°C, the composite powder includes diatomite and zeolite powder with a weight ratio of 1:0.1-0.5; b, roast the composite powder Add the body into the ethanol solution, adjust the pH to 4.5-4.6, stir at 65-70°C, add dropwise an aqueous solution of a silane coupling agent with a mass concentration of 4-6%, stir for 2.5-3.5h, and filter under reduced pressure to remove the solvent. Vacuum drying can be obtained. The prepared concrete admixture can improve mechanical properties such as flexural strength and compressive strength of the pipe pile concrete, and improve common quality problems such as pile body fracture, pile top or pile tip damage and the like during the construction of the prestressed pipe pile.

Description

technical field [0001] The invention relates to the technical field of pipe pile concrete, in particular to a concrete admixture and a preparation method thereof. Background technique [0002] Prestressed pipe pile is a hollow cylindrical slender concrete prefabricated component, which is often used as the foundation of industrial and civil buildings, highways, bridges and other buildings. It has the advantages of simple construction technology, reliable quality, relatively cheap cost, and convenient inspection. [0003] During the construction of prestressed pipe piles, the prestressed pipe piles are sunk into the ground by hammering or static pressure. However, there are some common quality defects in the construction process of the current prestressed pipe piles, such as fracture of the pile body, damage of the pile top or pile tip, etc. A large part of the reason for this common problem is that the mechanical properties such as the flexural strength and compressive stre...

AI Technical Summary

Problems solved by technology

However, the current prestressed pipe piles have some common quality defects in the construction process, such as pile body fracture, pile top or pile tip damage, etc.

A large part of the reason for this common problem is that the concrete used to make prestressed pipe piles has poor mechanical properties such as flexural strength and compressive strength.

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