High performance concrete with water quenching manganese slag and preparation method thereof

Abstract

The invention discloses a high performance concrete with water quenching manganese slag and a preparation method thereof. The high performance concrete is prepared by hydraulic cementing materials, gravel, sand, water and a small amount of surfactant, wherein the hydraulic cementing materials comprise the following components in percentage by weight: 15%-30% of water quenching manganese slag doped with 4%-10% of natural anhydrite, 8%-10% of expanding agent and 60%-77% of cement. In the invention, the manganese slag and the expanding agent are used for preparing the high performance concrete in a double-doped way; firstly, aiming at potential hydraulicity of the manganese slag, high-value comprehensive application is carried out, thereby reducing the hydration heat of the cement, saving the cement consumption in the concrete and lowering the cost of the concrete; the expanding agent is also used for solving the problem of shrinkage cracking of the concrete, thereby ensuring the dimensional stability of the high performance concrete; and meanwhile, a large amount of industrial solid wastes (manganese slag) can be slaked by the invention, thereby strengthening the comprehensive utilization of waste slag and reducing the environmental pollution.

Description

Technical field [0001] The present invention involves a high -performance concrete and its preparation method of water quenching manganese slag, which belongs to the field of waste residue and building materials. Background technique [0002] my country is the world's largest iron alloy production country. It is not only a large country of iron alloy, but also a large exporter of iron alloy. In 2003, my country's iron alloy output was 6.37 million tons, accounting for 30 % of the world's total output. A total of 10.87 million tons of 17 %.At present, more than 800 companies with more than 800 smelting manganese -iron alloys have brought about increasing issues of manganese slag emissions.Manganese residue (iron alloy residue) is a kind of industrial solid waste formed by the 1400 ° C melt emissiond in the process of galgraphous furnace smelting manganese iron alloys.The main chemical ingredients are silica (SIO 2 ). 2 O 3 ), Calcium oxide (CAO), magnesium oxide (MGO), manga...

AI Technical Summary

Problems solved by technology

Because these manganese slags are not fully utilized and piled up into mountains, it not only takes up a lot of cultivated land, but also seriously pollutes the surrounding environment, affecting the sustainable development of enterprises

[0004]In addition, with the rapid development of my country's national economic construction, the concrete in the construction industry is developing rapidly towards high-strength and high-performance concrete, but high-strength and high-performance concrete is easy to bring hydraulic adhesive The problem of high amount of coagulation material and high heat of hydration causes greater shrinkage and cracking probability of concrete, thus affecting the general application of high-strength and high-performance concrete

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