A kind of calcium-poor silicon-rich ecological cement and its application

Abstract

The invention discloses a calcium-poor and silicon-rich ecological cement and application thereof. The cement is prepared from a silicon-rich body and a calcium-rich body in a mixing mode. The silicon-rich body is obtained by adding a small amount of alkali metal salt into a wide-source silicon-aluminum material and then carrying out low-temperature calcination, and the calcium-rich body is composed of a raw material releasing Ca(OH)2 when hydrated and a raw material containing CaSO4. Compared with portland cement, the calcium-poor and silicon-rich ecological cement is good in early strength property, and the long-term strength can meet most use requirements; the raw materials of the calcium-poor and silicon-rich ecological cement are easy to obtain, and carbon emission, energy consumption, pollution and the like are substantially reduced; furthermore, a large quantity of solid industrial residues can be consumed, and the calcium-poor and silicon-rich ecological cement has important economic and social value.

Description

technical field [0001] The invention belongs to the field of ecological gelling materials and applications thereof, and in particular relates to a calcium-poor silicon-rich ecological cement and applications thereof. Background technique [0002] Since the British J. Asputin applied for the patent of Portland cement (called Portland cement in my country) in 1824, the application of this cement has been greatly developed in the past 200 years. The industry chain based on it is extremely complete and huge, especially the concrete related technology based on Portland cement as the cementitious material is developing rapidly. First of all, the improvement of production equipment has greatly improved the production efficiency of cement and reduced the production cost; secondly, the development of mixed materials and admixture technology has not only reduced the cost of cement concrete and carbon emissions, but also made full use of industrial waste. Comprehensive performance in ...

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Problems solved by technology

On the other hand, because SiO 2 It is the main chemical component of industrial waste residue, which enables silica-rich cement to maximize the use of solid waste, which is environmentally friendly; moreover, due to the high decomposition temperature of limestone, high energy consumption, and high carbon emissions, if the cement industry avoids the use of limestone resources Excessive dependence will greatly reduce energy consumption, carbon emissions and exhaust emissions, greatly enhance the sustainability of development, and its long-term economic and social benefits will be inestimable