Artificial fish reef concrete and its preparation method

Abstract

The invention relates to artificial fish reef concrete and a preparation method thereof. The artificial fish reef concrete is prepared by raw materials including cement, mixing water, fine aggregate, stone and an additive, wherein the mass proportion of the cement to the mixing water to the fine aggregate to the stone is 1: (0.3-0.5): (1-1.8): (2.4-3.4); the artificial fish reef concrete is de-molded after being cast for 12 to 24 hours, and the de-molded artificial fish reef concrete is maintained in seawater for 7 to 28 days. The artificial fish reef concrete and the preparation thereof have the characteristics that a rapid-hardening sulphoaluminate cement is used as a cementing material, and the cementing material generates little Ca(OH)2 after being hydrated. Through maintaining the artificial fish reef concrete by seawater, the performance is excellent; in a natural sea area, the pH (potential hydrogen) of a pore liquid seeping from the surface of the concrete is similar to the pH value of the seawater in a short time, therefore, the concrete is beneficial for marine organisms such as sea algae and microorganism to adhere and breed; meanwhile, the concrete also has excellent workability, high strength and higher durability.

Description

technical field [0001] The invention belongs to the intersecting field of building materials and marine engineering, and relates to artificial fish reef concrete and a preparation method thereof. Background technique [0002] The 21st century is the "ocean century". Countries will raise their maritime strategy to an unprecedented strategic height, and the development of marine economy will stand at a new historical starting point. While accelerating the development of the marine economy, the offshore ecological environment and resource constraints will also face further difficulties. It has become an essential trend to develop a system for the restoration and improvement of the marine environment. At present, countries around the world are competing to carry out marine engineering development projects for ecological restoration named after marine ranches. [0003] Among the several methods of marine ranching, the artificial reef is a three-dimensional use of the water body...

AI Technical Summary

Problems solved by technology

[0005] Artificial fish reef concrete will encounter the following problems in the future development: (1) Ordinary Portland cement used in reinforced concrete artificial fish reefs has a high pH value, which is not conducive to algae attachment and growth, and its carbon emissions are high

(3) Salt erosion and biological corrosion in the ocean lead to expansion and deterioration of concrete and corrosion of steel bars, reducing the life of reinforced concrete artificial fish reefs

However, this method requires high-temperature curing during the preparation process, which is not practical in engineering construction, and its durability is unknown.

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