High-strength concrete material with iron ore as aggregate and preparation method of high-strength concrete material

Abstract

The invention discloses a high-strength concrete material with iron ore as a aggregate. The iron ore is adopted as a coarse aggregate and a fine aggregate, and admixtures such as ground fine mineral powder, silica fume and I-grade fly ash are comprehensively utilized. The ultrahigh-strength concrete material with the strength grade reaching 80 MPa and the bending strength reaching 10.0 MPa is prepared by utilizing a high-performance polycarboxylate water reducing agent, the strength loss rate of 100 sulfate dry-wet cycles is less than or equal to 10%, and the mass loss rate is less than or equal to 3.0%; the anti-permeability grade is more than P20, no potential alkali aggregate reaction danger exists, the sand wind abrasion resistance is high, the rib protection performance is excellent,the crack resistance is high, and the deficiencies and defects of a traditional concrete material can be effectively overcome on the premise that the cross section area of a pier is not increased.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a high-strength concrete whose aggregate is iron ore and a preparation method thereof. Background technique [0002] The bridge piers in bridge projects in rivers, lakes, near-coastal areas and desert Gobi areas are similar to the infrastructure in inland areas in that reinforced concrete materials are generally used as the main structural material. The biggest difference lies in rivers, lakes, and near-coastal areas. The infrastructure projects in the desert and Gobi areas have higher requirements for concrete materials, mainly manifested in stronger ability of water erosion, ship impact, flying sand wear, freeze-thaw cycle, etc., in order to ensure the safety of reinforced concrete structures, especially bridge piers , stability, requires concrete materials to have excellent long-term performance and durability. Concrete materials used in inland areas or in tradi...

AI Technical Summary

Problems solved by technology

For bridge piers in rivers, lakes, coastal areas and desert Gobi areas, especially bridge facilities such as sea-crossing bridges, coastal bridges, Northwest China, especially the Hexi Corridor, the general design life is 100 years, which is obviously traditional. Reinforced concrete materials cannot meet the requirements