Strontium calcium aluminium sulphate cement

A technology of calcium strontium sulfoaluminate and sulfoaluminate, which is applied in the field of cement materials, can solve the problems of low strength and achieve the effects of high strength, energy saving and economic benefit improvement in the later stage

Inactive Publication Date: 2009-01-14
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a new type of calcium strontium sulfoaluminate cement with strontium calcium sulfoaluminate and dicalcium silicate as main mineral phases. Improve the utilization rate of strontium-containing waste residue, reduce the firing temperature, and save the production cost of cement

Method used

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  • Strontium calcium aluminium sulphate cement
  • Strontium calcium aluminium sulphate cement
  • Strontium calcium aluminium sulphate cement

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Embodiment Construction

[0028] See Table 1, Table 2, Table 3 and Table 4 for specific examples of strontium calcium sulfoaluminate cement described in the present invention.

[0029] Table 1 raw material formula (kg)

[0030]

[0031] Table 2 Cement clinker mineral composition %

[0032]

[0033] Table 3 Cement clinker chemical composition %

[0034]

[0035] For the above three types of clinker, 5% gypsum was added, and the physical properties of the cement are shown in Table 4.

[0036] Table 4 cement physical properties

[0037]

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Abstract

The invention relates to a new variety of cement taking strontium calcium sulphoaluminate and dicalcium silicate as main mineral phases, which belongs to the cement technique field. The invention discloses a strontium calcium sulphoaluminate cement, a cement clinker is a mineral phase system composed of strontium calcium sulphoaluminate mineral, dicalcium silicate and calcium ferroalumnate, and all minerals include, in weight percentage: 40 to 80 percent of strontium calcium sulphoaluminate mineral, 15 to 40 percent of dicalcium silicate, and 2 to 25 percent of calcium ferroalumnate. The cement has advantages of low sintering temperature, fast coagulation time, high initial and later strength and good corrosion resistance. The cement uses industrial strontium-containing waste residues when producing the cement clinker, reduces the environmental pollution by strontium residues, finds an effective way for treating industrial waste residues, reduces the usage of natural mineral resources, and has rather high social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of cement materials, and in particular relates to calcium strontium sulfoaluminate cement which is prepared by using strontium slag as a main raw material and whose main mineral phase is strontium calcium sulfoaluminate and dicalcium silicate. Background technique [0002] Calcium sulfoaluminate is the main mineral phase of ordinary sulfoaluminate cement. Studies have shown that calcium sulfoaluminate has good gelling properties, fast hydration speed, high early strength, but low later strength growth rate. Many studies have prepared calcium sulfoaluminate and alite composite mineral phase cement to further improve the mechanical properties of cement. but since C 4 A 3 S firing temperature is low (1200℃~1350℃), C 3 The sintering temperature of S is high (>1450°C), and it is necessary to add a mineralizer during the preparation process to lower the sintering temperature to realize the composite of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/345
CPCC04B2111/26C04B7/421
Inventor 程新常钧叶正茂谭文杰芦令超
Owner UNIV OF JINAN
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