Modified phosphorus slag powder, concrete prepared by using the phosphorus slag powder, and method for making concrete

Abstract

The invention provides a modified phosphorous slag powder, a concrete prepared from the modified phosphorous slag powder and a preparation method of the concrete, and belongs to the technical field of concrete preparation. The modified phosphorous slag powder comprises a phosphorous slag powder, an organic salt and cationic starch. The organic salt and the cationic starch are used for modifying the phosphorous slag powder in stead of common chemical excitation carried out on the phosphorous slag by using an inorganic alkali activator in the prior art; when the modified phosphorous slag powder is used for preparing the concrete, the dosage of the modified phosphorous slag powder accounts for 38-70wt% of the total amount of the cementing material; the 3d compressive strength of the concrete ranges from 14.5 to 33.5MPa, and the 28d compressive strength of the concrete ranges from 30.6 to 77.3MPa, and the stability of the concrete is good; the utilization rate of the phosphorous slag powder is greatly reduced while the cost of the concrete is reduced, and therefore, the environmental pollution problem caused by the phosphorous slag can be reduced.

Description

technical field [0001] The invention relates to a modified phosphorus slag powder, concrete prepared by using the modified phosphorus slag powder and a method for making the concrete, belonging to the technical field of concrete. Background technique [0002] Phosphorus slag is a kind of industrial waste produced in the process of producing yellow phosphorus by electric furnace. When yellow phosphorus is produced by electric furnace method, the obtained melt with calcium silicate as the main component is granulated electric furnace phosphorus after quenching. Slag, referred to as phosphorus slag. Usually, about 8-10 tons of phosphorus slag are produced for every ton of yellow phosphorus produced. If the generated phosphorus slag is not utilized and piled up in the open for many years, the phosphorus, fluorine and toxic elements contained in the phosphorus slag will penetrate into the soil and cause environmental pollution. In order to reduce the pollution of phosphorus sla...

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Problems solved by technology

[0007] What the present invention aims to solve is that when phosphorus slag is used in concrete, there are problems such as long retarding time and low early strength, and a modified phosphorus slag powder that can effectively solve the problem of concrete retardation and the preparation of the modified phosphorus slag powder are provided. Concrete Gauge Method of Concrete Preparation

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