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Alite-barium calcium sulfur aluminate cement

The technology of barium calcium sulfoaluminate and calcium ferric aluminate is applied in the field of cement materials, which can solve the problems of high cost and unsuitability for mass production, and achieve the effects of accelerating hardening speed, saving limestone resources and reducing shrinkage rate.

Inactive Publication Date: 2005-11-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main mineral of this kind of cement is mainly barium-containing sulfoaluminate, the proportion is 40-80%, and the main raw material is barite, etc., which has high cost and is suitable for special construction projects. Mass production

Method used

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  • Alite-barium calcium sulfur aluminate cement
  • Alite-barium calcium sulfur aluminate cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] The specific examples of Alite-barium calcium sulfoaluminate cement of the present invention are shown in Table 1, Table 2 and Table 3.

[0036] Numbering

[0037] 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 0.6 to 1.2%. The chemical composition of the raw meal is shown in Table 2

[0038] Numbering

[0039] In the laboratory, the above clinker is fired in a silicon-molybdenum rod electric furnace, and the firing temperature is 1360°C-1380°C. The physical properties of cement are listed in Table 3.

[0040]

[0041] The 3# clinker was analyzed by XRD, as shown in Figure 1. It can be seen that in the alite-barium calcium sulfoaluminate cement clinker mineral system, a certain amount of alite and barium calcium sulfoaluminate minerals are formed, which further shows that the compounding and coexistence of these two minerals can achieve ...

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Abstract

An Alinty-barium calcium thioaluminate cement contains barium calcium thioaluminate (3-38 wt.%), tricalcium aluminate (3-20), tricalcium silicate (30-60), dicalcium silicate (15-40), and ferroaluminate (3-20). Its advantages are low burning temp, high early strength and hardening speed, and low cost.

Description

(1) Technical field [0001] The invention belongs to the technical field of cement materials, in particular to an alite-barium calcium sulfoaluminate cement compounded with barium calcium sulfoaluminate mineral and alite mineral. (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), low early strength and long setting time, resulting in high energy consumption for cement manufacturing and increased production costs. It has a certain influence on the construction speed and construction quality. Therefore, how to further reduce the firing temperature of Portland cement and improve its early performance is a key problem in the field of cement technology. [0003] For example, the Chinese patent "barium-containing sulfoaluminate cement" published on September 13, 1989 with the publication number CN1035486A is a fast-hardening and early-strength cement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/00C04B7/345
CPCY02P40/10
Inventor 程新芦令超常钧刘福田于京华岳云龙王来国陈亚明
Owner UNIV OF JINAN
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