High-magnesium low-heat portland cement clinker aggregate and preparation method thereof

A technology of Portland cement and cement clinker, applied in the field of cement, can solve problems such as unfavorable crack resistance of concrete

Inactive Publication Date: 2007-09-26
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The performance characteristics of high belite cement are very suitable for the construction application of mass concrete and hydraulic concrete. The applicant has patent 98100581.0 which discloses a high belite cement clinker and its preparation process. It has excellent properties such as low heat of hydration, low water demand, high fluidity, high strength and high durability. However, in the process of specific research and application, it was found that the autogenous volume deformation of concrete is micro-shrinkage, which is detrimental to the crack resistance of concrete. , researched and developed a low-heat Portland cement with high magnesium content to compensate for the late shrinkage of concrete

Method used

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  • High-magnesium low-heat portland cement clinker aggregate and preparation method thereof
  • High-magnesium low-heat portland cement clinker aggregate and preparation method thereof
  • High-magnesium low-heat portland cement clinker aggregate and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: The proportioning is limestone: high-magnesium limestone: clay: iron powder: silica = 30.6: 45.9: 13.5: 4: 6 for batching. The chemical composition of raw materials is shown in Table 1, and the clinker composition, rate and mineral composition are shown in Table 1. Table 2. High-activity high-magnesium low-heat Portland cement clinker is produced by conventional methods (see Figure 2 production process) in a φ2.5×45m five-stage cyclone preheater kiln. The clinker is fine and uniform, with good granulation and no Pulverization phenomenon, the clinker is mixed with gypsum as a retarder to produce high-magnesium low-heat Portland cement. The physical performance test results are shown in Table 3.

[0021] raw material

[0022] Clinker chemical composition, %

[0023]

Embodiment 2

[0024] Embodiment two: adopt proportioning to be limestone: clay: iron powder: red mud: silica=69.3: 9.3: 1.5: 14: 5.9 carry out batching, produce the high-activity high-magnesium low-heat portland cement with the method for embodiment one Clinker, its clinker composition, rate value and mineral composition are shown in Table 4.

Embodiment 3

[0025] Embodiment three: adopt proportioning to be high-magnesium limestone: fly ash: iron powder: yellow sand=78.2: 6.1: 3.6: 12.1 carry out batching, produce the highly active high-magnesium low-heat Portland cement cooked by the method of embodiment one See Table 4 for clinker composition, ratio and mineral composition.

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Abstract

The invention discloses a high-magnesium lower thermal silicate cement clinker, making mineralogical composition at (mass percent): 40 -65% C2S, 15-40% C3S, 1-8% C3A, 10-25% C4AF and content of MgO at 2.0-6.0%. The invention also discloses a preparing method of high-magnesium lower thermal silicate cement clinker, including indispensable steps of producing cement clinker with raw materials and controlling content of MgO of cement clinker at 2.0-6.0%.

Description

technical field [0001] The invention relates to a cement, in particular to a high-performance high-magnesium low-heat portland cement which can be used in high-performance concrete, mass concrete, hydraulic concrete and other projects and a preparation process thereof. Background technique [0002] With the continuous deepening of people's understanding of the problems of high energy resource consumption and relatively serious environmental load in the cement industry and the increasing emphasis on improving the durability of cement concrete, energy saving, consumption reduction, environmental protection and further improvement of cement concrete performance have become possible for the international cement industry. direction of sustainable development. The performance characteristics of high belite cement are very suitable for the construction application of mass concrete and hydraulic concrete. The applicant has patent 98100581.0 which discloses a high belite cement clink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/06
CPCC04B7/02Y02P40/121
Inventor 隋同波文寨军王晶张忠伦范磊刘克忠王显斌刘云
Owner CHINA BUILDING MATERIALS ACAD
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