A kind of tuff stone powder admixture for concrete and preparation method thereof

Abstract

The invention relates to a tuff powder admixture used for concrete and a preparation method thereof. The tuff powder admixture used for concrete is prepared from the following raw materials in parts by weight: 1000 parts of tuff and 0.13 to 1.3 parts of a modifying agent, wherein the modifying agent comprises a grinding-aid component, an air-entraining component and a thickening component with a mass ratio of 10: 1: 2; the grinding-aid component is any combination of one or two or three selected from the group consisting of triethanolamine, modified triethanolamine and tri-isopropanolamine; the air-entraining component is any combination of one or two selected from the group consisting of saponin air-entraining agents and alkyl aromatic sulfonate air-entraining agents; and the thickening component is any combination of one or two selected from the group consisting of cellulose ether and microbial exopolysaccharides. The tuff powder admixture provided by the invention has the following advantages: the specific surface area is more than or equal to 300 m<2> / kg; the apparent density rho is more than or equal to 2.64 g / cm<3>; the 7-day activity index is more than or equal to 60%; and the 28-day activity index is more than or equal to 70%.

Description

technical field [0001] The invention relates to an admixture and a preparation method thereof, in particular to a tuff rock powder admixture for concrete and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the development of science and technology and the progress of human society, the demand for energy and mineral resources in national defense construction, infrastructure construction, industrial production and people's life is increasing. At present, the unsustainable resources such as oil and minerals in the world have been largely consumed Consumed, increasingly exhausted. Due to its unique chemical composition, rare element content and diversified physical and chemical properties, tuff has become a new and important non-metallic mineral resource, which will be used in building materials, agricultural production, fine chemicals, food, energy conservation Industries and fields such as environmental ...

AI Technical Summary

Problems solved by technology

[0006] The Chinese patent document with the application publication number CN 104891851 A discloses a high-strength concrete strength activator and its preparation method. The components include: 8-10% triethanolamine and 8-10% triisopropanolamine by weight percentage , self-made XC additive 3-5%, redispersible latex powder 0.05-0.2%, nano-silicon dioxide 1-2%, xanthan gum 0.05-0.2%, defoamer 0.05-0.2%, and the balance is water; The preparation method is as follows: each component is weighed according to measurement; each component is dissolved in water respectively to make a solution, and finally the aqueous solution of each component is mixed, and the finished product is obtained after fully stirring until uniform; the strength of the high-strength concrete is stimulated As a water agent admixture, it stimulates the unhydrated cement and acts on the cement, and finally improves the mechanical properties of the concrete. During the processing, the grinding efficiency of the material cannot be effectively improved.

[0007] At present, the research results of tuff as an admixture have not been reported in detail, and the technical research is still in its infancy. It can be seen that the development and application of tuff has not yet attracted attention in my country.

Images