Concrete used for pouring of spandrel girder

Abstract

The invention discloses a concrete used for pouring of a spandrel girder. The concrete comprises the following substances by mass: 200 to 300 parts of cement clinker, 200 to 250 parts of industrial waste residue, 100 to 200 parts of fly ash slag, 200 to 250 parts of cobblestone, 5 to 25 parts of steel fiber, 100 to 150 parts of mineral powder, 10 to 20 parts of sodium chloride, 20 to 60 parts of titanate, 5 to 10 parts of sodium sulfate, 20 to 30 parts of sodium borate, 13 to 15 parts of sodium nitrite, 100 to 400 parts of water, 10 to 20 parts of stainless steel powder and 10 to 30 parts of aluminum powder. Addition of the stainless steel powder and the aluminum powder into the concrete can improve the pouring strength of the concrete; meanwhile, the stainless steel powder and the aluminum powder are not prone to oxidation, so the phenomena of cracks and fine pores after completion of pouring of the concrete are avoided; and the added steel fiber functions as a link, so cracking can be further prevented.

Description

technical field [0001] The invention relates to the field of building materials, in particular to concrete used for pouring load-bearing beams. Background technique [0002] As one of the most important building materials at present, concrete is used in almost all modern buildings. However, since the concrete must contain air in its interior during application, cracks are often formed after solidification. Although, builders have adopted vibrating rods to remove air, but the effect is not satisfactory. [0003] For this reason, some users adopt the cement disclosed in the Chinese invention patent: a kind of cement with anti-crack and anti-leakage (invention announcement number: CN101037307U) as a component of concrete. The crack-proof and leak-proof cement uses Portland cement as raw material mixed with iron powder to make the iron react with air and water, so that the iron expands rapidly and drives the cement to automatically fill the capillary in the concrete with great...

AI Technical Summary

Problems solved by technology

However, such concrete has been found in actual use: due to the rapid oxidation of iron, the storage time of cement is extremely short, about less than one month, which increases the risk of concrete use

At the same time, the increase of iron content makes the density of the cement larger, thereby increasing the weight of the concrete, and the strength of the concrete is reduced due to the presence of iron oxides in the formed concrete

[0004] The load-bearing beam of the building has high requirements on the quality of the concrete, and the oxide will reduce the strength, so it cannot meet the needs of the beam pouring