An ecological rust-resistant seawater sea sand corrosion-resistant marine concrete

Abstract

The invention discloses an ecological anti-corrosion type seawater sea sand corrosion-resistant marine concrete. Fiber, superplasticizer and sea water. Its preparation method is to mix cement, silica fume, fly ash microbeads, blast furnace slag powder, aggressive ion inhibitors, and steel fibers and mix them evenly with a mixer, add sea sand and continue to stir evenly, then add seawater and water reducing agent, Stir mechanically until it is evenly stirred to obtain a concrete slurry. After pouring, remove the formwork and place it at 80°C and 95% humidity for 48 hours of curing. The concrete of the invention has the advantages of high chloride ion solidification rate, good working performance, good durability, low cost, local acquisition of raw materials and short construction period, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an ecological antirust type seawater sea sand corrosion-resistant marine concrete and a preparation method thereof. Background technique [0002] The marine environment lacks sufficient fresh water, and transporting large quantities of water for concrete mixing is expensive. The main source of construction sand is river sand, but the supply of river sand is limited by factors such as resources and environmental influences, and cannot fully meet the needs of construction. At present, many large-scale infrastructure constructions across the sea and along the coast are underway in China. The demand for construction sand in the construction industry continues to increase, and river sand resources are increasingly scarce, making people shift their attention to sea sand with abundant reserves. For reinforced concrete structures in humid and high-temperature envi...

AI Technical Summary

Problems solved by technology

Under the coupling effect of multiple factors, the internal structure of concrete is damaged, the gelling force is degraded, and the corrosion rate of steel bars is increased, which makes the engineering structure fail prematurely, and the service life cannot reach the designed service life, resulting in huge economic losses.

[0003] At present, it is a novel idea to use abundant seawater and sea sand to prepare corrosion-resistant marine concrete, but it faces the following problems: seawater and sea sand contain a large amount of chloride salts, the presence of chloride salts, during the electrochemical corrosion process of steel bars Acting as a catalyst in the medium, it will thin the alkaline passivation film on the surface of the concrete reinforcement, and promote the corrosion of the reinforcement, resulting in a decrease in the durability of the concrete.

Images