High-strength concrete taking carbon chromium slag as main aggregate, processing device and preparation process of high-strength concrete

Abstract

The invention discloses high-strength concrete with carbon chromium slag as main aggregate, a processing device and a preparation process of the high-strength concrete. The high-strength concrete is prepared from high-strength aggregate, a magnesium chloride solution, a defoaming agent, light calcined magnesia, fly ash, deionized water, a composite modifier, polypropylene fiber powder, zinc maleate, acrylamide and dibenzoyl peroxide. According to the invention, the composite modified carbon chromium slag is used as a main aggregate, the nickel iron slag is used as an auxiliary aggregate, the solid waste is used for replacing the traditional gravel aggregate, and the magnesium cementing material is used for replacing the cement, so that the strength of the concrete is improved, the surface hardness is high, the wear resistance is strong, the concrete is not easy to crack and wear, and the use requirements of high-strength scenes are met; the carbon chromium slag is subjected to reduction, recycling and high-value comprehensive utilization, the added value is high, the utilization amount is large, the problem of accumulation of the carbon chromium slag is solved while gravel aggregate is replaced, and the carbon chromium slag is high in tensile strength, high in toughness, resistant to cracking and seepage, long in service life and reliable in work.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to high-strength concrete with carbon-chromium slag as main aggregate, a processing device and a preparation process thereof. Background technique [0002] Carbon-chromium slag is called high-carbon ferrochromium alloy slag, which is a mineral melt produced in the process of smelting chromite in a submerged arc furnace with carbon as a reducing agent at a high temperature of 1700 °C. Due to the high viscosity and high melting point of carbon-chromium slag, the slag and iron cannot be completely separated. For every 1t of ferrochromium alloy produced, 2.5-2.6t of chromite, 0.5-0.6t of coke and 0.3t of slag-forming agent are consumed, producing 1 The waste residue of ~1.2t is piled up in the form of waste residue, which not only occupies land, wastes resources, but also pollutes the environment. [0003] The main compounds in the carbon-chromium slag are silicon dioxide, aluminum ox...

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Problems solved by technology

[0007] However, the sand and gravel aggregate of ordinary concrete has low strength, poor surface hardness and wear resistance, and is easy to break and wear. Cracks are generated, the service life is limited, and the reliability of work is poor. In addition, most of the traditional concrete mixing processing devices are of vertical structure and do not have the dumping function.

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