Cement production and preparation method

Abstract

The invention discloses a cement production and preparation method. Raw materials include 50-100 parts of silicate cement, 60-120 parts of coal ash, 40-80 parts of fine sand, 20-40 parts of graphite powder, 1-7 parts of polyvinyl alcohol fiber, 0.5-2 parts of water reducer, 0.1-0.2 part of additive and 20-40 parts of gypsum powder; calculated by volume fraction, the graphite powder accounts for 5-15% of total volume of the raw materials, and the polyvinyl alcohol fiber accounts for 1-2% of the total volume of the raw materials; the additive is composed of 5-10 parts of nano silicon dioxide, 15-20 parts of triethanolamine, 10-15 parts of water glass, 10-15 parts of dispersant, 5-8 parts of calcium carbonate, 1-1.5 parts of excitant and water. Cement has higher tensile strength and high tenacity, is suitable for damage restoring and reinforcing of structural tensioned parts and structure paving layers having high requirements on ductility and has special solidification enhancing effect on improving pile forming performance of engineering of organic matter soil, peat soil and pond-river sludge.

Description

technical field [0001] The invention relates to cement production, in particular to a cement production and preparation method. Background technique [0002] At present, improving the performance of cement materials to meet the functional requirements of modern building structures is the development direction of civil engineering materials research; The electrical conductivity of the material is improved to obtain a self-sensing cement-based composite material with low resistivity, good durability, and even good pressure sensitivity, making traditional cement materials more intelligent; [0003] Carbon-based materials, such as carbon nanotubes, nanocarbon black, graphene, and natural graphite, have high specific surface area and good electrical conductivity, and are the best choice for conductive media in cement-based composite materials. The application shows that its improvement in electrical conductivity is also better than that of metal fibers, powders or slag filled al...

AI Technical Summary

Problems solved by technology

[0003] Carbon-based materials, such as carbon nanotubes, nano-carbon black, graphene and natural graphite, have high specific surface area and good conductivity, and are the best choice for conductive media in cement-based composite materials. In the existing research The application shows that its improvement in conductivity is also better than that of metal fibers, powders or slag filled alone; however, affected by the molecular structure of carbon molecules and the large intermolecular force, the material has strong water absorption as a conductive medium. It is easy to agglomerate; Yang Yuanxia, ​​Mao Qizhao, Shen Darong, etc. proposed a study on fiber dispersion in carbon fiber cement-based composite materials, and found that the addition of carbon-based conductive phases to ordinary cement-based materials will reduce the fluidity of the material mixture on the one hand. Increase the water-binder ratio; on the other hand, it will affect the hydration reaction and greatly weaken the mechanical properties of the material;

[0004] However, in practical applications, the preparation process of improved cement is cumbersome and costly, which hinders its wide application.