A method for preparing coal gangue-cement mortar test block using composite chemically excited coal gangue as raw material

Abstract

The invention relates to a method for preparing a coal gangue-cement mortar test block by taking composite chemi-excitation coal gangue as a raw material. The coal gangue-cement mortar test block comprises the following raw materials by weight percent: cement clinker, coal gangue powder, anhydrous sodium sulfate, sodium silicate, quicklime, gypsum, standard sand and water. The method comprises the following steps of pouring the water, the cement clinker, the coal gangue powder and a chemi-excitation agent into a mixing pot, stirring at low speed, then adding the standard sand, and then stirring at high speed to obtain a mortar material; loading the mortar material into a test mould, vibrating for compaction on a vibrating table to obtain a mortar test sample, curing the mortar test sample and the test mould together in wet gas for 24 hours, then demoulding, horizontally or vertically placing the mortar test sample into the water after demoulding, and curing for 28 days to prepare a product. The method disclosed by the invention can be used for enhancing the activity of the coal gangue by carrying out composite excitation on the coal gangue, increasing the mixing amount of the coal gangue in a cement composite system and promoting the wide application of the coal gangue in industrial production.

Description

technical field [0001] The invention relates to a method for preparing a coal gangue-cement mortar test block by using composite chemically excited coal gangue as a raw material. Background technique [0002] With the rapid and rapid development of the world economy, all walks of life have an increasing demand for energy, and coal, as a solid fuel with huge reserves in the world, has always been favored by people and has become an indispensable part of daily life and production. Energy-supplying substances. However, with the large-scale mining of coal, solid waste represented by coal gangue is continuously mined out. Due to its low carbon content and a large amount of clay minerals, it is not easy to be used as an energy supply material. Therefore, a large amount of random stacking not only occupies a large amount of land and farmland on the one hand, but on the other hand, a large amount of coal gangue piled up often spontaneously ignites, producing toxic gases and a large...

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of method that is raw material preparation coal gangue-cement mortar test block with composite chemical excitation coal gangue, with different dosage and different types of activators to coal gangue glue Coagulation activity, using low-temperature calcined activated solid waste coal gangue to replace part of the cement to prepare coal gangue-cement mortar test blocks, which solves the high production cost of cement mortar test blocks and the accumulation of coal gangue occupies a large amount of land in my country Resources, causing great pollution to the surrounding environment, seriously affecting and endangering people's lives and health, and has practical value for expanding the application field of coal gangue raw materials

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