Oceaneering sea sand concrete

Abstract

The invention relates to an oceaneering sea sand concrete, and belongs to the field of building materials. Sea sand used in the concrete is preprocessed according to the following method: cleaning anddrying the sea sand, mixing the sea sand and a rubber powder, ball-milling, processing for 1-6 hours at the temperature of 150-200 DEG C, standing, then crushing, grinding, and acquiring a particle,wherein the average grain diameter of the particle is less than 100 micrometers; mixing the particle with an EPS (Expandable Polystyrene) particle; and ball-milling the obtained mixture for 2-12 hoursto obtain clinker sea sand. The sea sand concrete takes the sea sand as the raw material and is an anti-chloridion permeation concrete, moreover, the problem of high chloride ion concentration of thesea sand is overcome. Therefore, the local materials are used in the construction engineering, and the cost is reduced.

Description

technical field [0001] The invention relates to sea sand concrete for marine engineering, belonging to the field of building materials. Background technique [0002] Sea sand concrete is concrete made by mixing sea sand with other building materials. When sea sand is used to prepare reinforced concrete, the chloride ion content in sea sand should not exceed 0.06% (calculated as a percentage of dry sand). On the one hand, the excess of chloride ions will damage the concrete itself and cause micro-cracks; when the chloride ions accumulate to a certain concentration, it will destroy the passivation film of the steel bar and cause corrosion of the steel bar; when the corrosion rate reaches more than 10%, it will cause the protective layer to deteriorate. Cracks along the tendon, peeling off of the protective layer, peeling off, and the seismic performance of the steel bar is greatly reduced. [0003] The concrete used in marine engineering is marine concrete. The country has ...

AI Technical Summary

Problems solved by technology

For reinforced concrete buildings such as ports, bridges, and reinforced concrete pipelines that enter and exit seawater, after a large amount of chloride ions penetrate into the concrete, they will corrode the steel bars, resulting in damage to the buildings, and even destroy the safety of the buildings and reduce their service life.