Ecological dustproof type seawater sea-sand anti-corrosion marine concrete and preparation method thereof

Abstract

The invention discloses an ecological dustproof type seawater sea-sand anti-corrosion marine concrete and a preparation method thereof. The concrete comprises the following raw materials: cement, silica fume, coal ash beads, blast furnace slag powder, corroding ion inhibitors, sea sand, steel fibers, a water reducing agent and seawater. The preparation method comprises the following steps: mixingcement, silica fume, coal ash beads, blast furnace slag powder, corroding ion inhibitors and steel fibers and then uniformly stirring with a stirrer; adding sea sand and continuing to uniformly stir;adding seawater and the water reducing agent; mechanically stirring till uniformly stirring, thereby acquiring a concrete slurry; pouring and then removing a mold and maintaining for 48h at 80 DEG C under the condition of humidity of 95%, thereby acquiring the marine concrete. The concrete disclosed by the invention has the advantages of high curing rate of chloride ions, excellent working performances, high durability, lower cost, locally acquired raw materials, short construction period and suitability 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