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Belite-calcium barium sulphoaluminate cement

A technology of barium calcium sulfoaluminate and calcium aluminum ferrite, which is applied in the field of cement materials, can solve the problems of reducing the corrosion resistance and durability of cement, high energy consumption, and increasing the amount, so as to reduce the amount of consumption, improve the quality of construction, and later The effect of increased intensity

Inactive Publication Date: 2007-01-03
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since tricalcium silicate needs to consume more high-quality limestone mineral resources, and C 3 S needs to be formed in large quantities at a high temperature of 1450°C, resulting in high energy consumption
In addition, C 3 A high S content will make the Ca(OH) in the hydration product 2 The amount increases, reducing the corrosion resistance and durability of cement

Method used

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  • Belite-calcium barium sulphoaluminate cement
  • Belite-calcium barium sulphoaluminate cement

Examples

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Embodiment

[0038] See Table 1, Table 2 and Table 3 for specific examples of Belite-barium calcium sulfoaluminate cement of the present invention.

[0039] serial number

[0040] Prepare the raw meal according to the above six ingredients, and add a small amount of fluorite at the same time, according to CaF 2 Calculated as 0.5 to 1.2%. The chemical composition of the raw meal is shown in Table 2

[0041] serial number

[0042] In the laboratory, the above clinker is fired in a silicon-molybdenum rod electric furnace, and the firing temperature is 1320°C-1360°C. The physical properties of cement are listed in Table 3.

[0043] serial number

[0044] Carried out XRD analysis and SEM analysis to 4# clinker wherein, see respectively figure 1 with figure 2 . It can be seen that in the belite-barium calcium sulfoaluminate cement clinker mineral system, a new type of cement with belite-barium calcium sulfoaluminate as the dominant mineral phase system has ...

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Abstract

The present invention belongs to the field of cement material technology, and is especially one kind of Belite-calcium barium sulphoaluminate cement. The cement clinker is mainly one mineral phase system of C2S-CBAS-C3S-C3A-C4AF comprising calcium barium sulphoaluminate 5-45 wt%, dicalcium silicate 30-70 wt%, tricalcium silicate 10-45 wt%, tricalcium aluminate 2-20 wt%, and calcium aluminoferrite 2-20 wt%, where calcium barium sulphoaluminate has the molecular expression of (3-x)CaO .xBaO .3Al2O3 .CaSO4 with x=0.25-3. The present invention has the available of lower firing temperature, utilization of low quality limestone resource, high cement early strength, etc.

Description

(1) Technical field [0001] The invention belongs to the technical field of cement materials, in particular to a calcium barium sulfoaluminate (CBAS) mineral and belite (C 2 S) Mineral composite belite-barium calcium sulfoaluminate cement. (2) Background technology [0002] At present, Portland cement used in large quantities has some shortcomings and deficiencies, mainly manifested in high firing temperature (1450°C), high production energy consumption; high CaO content in clinker, consuming a large amount of high-quality limestone resources; cement hydration The process produces volume shrinkage, which leads to shrinkage micro-cracks and affects the mechanical properties of concrete; a large amount of Ca(OH) is formed after cement hydration 2 , and exists in the hardened cement paste, affecting the corrosion resistance and durability of cement and concrete. Therefore, how to further reduce the firing temperature of Portland cement, save high-quality mineral resources, and...

Claims

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Application Information

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IPC IPC(8): C04B7/345
CPCC04B7/3453Y02P40/10
Inventor 芦令超张卫伟叶正茂常钧黄世峰周宗辉程新
Owner UNIV OF JINAN
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