A kind of construction waste nano crystal core and its preparation method and application

Abstract

The invention provides a construction waste nano crystal nucleus and its preparation method and application. The raw material of the construction waste nano crystal nucleus comprises the following components in parts by weight: construction waste micropowder: 20-35 parts, anti-mud agent: 0.5 ~2 parts, hydration accelerator: 0.5-1 part, surface modifier: 0.1-0.5 part, dispersion stabilizer: 0.1-0.5 part, and the balance is water; the construction waste micropowder, the anti-mud agent, The total parts of the hydration accelerator, the surface modifier, the dispersion stabilizer and the water are 100 parts. The construction waste nanocrystal nucleus of the present invention can greatly improve the pore structure, induce nucleation to accelerate hydration, and significantly improve the early strength. When 5-15% of cement is replaced, the 1d compressive strength of ordinary Portland cement mortar can be improved More than 20%, the 3d compressive strength is increased by more than 10%, and the 28d compressive strength does not decrease. The invention provides a new direction for resource utilization of construction waste, and greatly improves the resource utilization rate of construction waste.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a nano crystal core of construction waste and its preparation method and application. Background technique [0002] During the accelerated development of industrialization and urbanization, the development of the construction industry and the replacement of buildings are also getting faster and faster, and the discharge of construction waste is also increasing. According to statistics, the amount of construction waste in China has already accounted for It accounts for 30-40% of the total amount of urban waste, and the annual output of construction waste in my country is more than 1.8 billion tons. However, under such an astonishing reserve, its resource utilization rate is less than 10%, and most of the construction waste has not been treated. It was transported to the suburbs or villages by the construction unit, stacked in the open air or landfilled, consuming a lot of...

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a construction waste nano crystal core to solve the problem of low resource utilization of existing construction waste

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