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Road silicate cement clinker and preparation method thereof

A technology of road portland and cement clinker, applied in the field of road portland cement preparation, cement clinker, road portland cement clinker, can solve the problems of complex steel slag composition, difficult cement raw meal, large fluctuation and so on

Inactive Publication Date: 2015-04-08
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the composition of steel slag is complex and fluctuates greatly, it is difficult to successfully use it as a component of cement raw meal

Method used

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  • Road silicate cement clinker and preparation method thereof
  • Road silicate cement clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] This implementation proposes a road Portland cement clinker prepared by using steel slag powder ingredients, which is used to prepare low-heat and high-flexibility road Portland cement. The cement clinker is made by grinding and calcining cement raw meal, and the cement raw meal is composed of the following materials in parts by weight: limestone: 50-85 parts; steel slag powder: 5-20 parts; sandstone : 5-15 parts; and fly ash: 5-15 parts. The percentages by weight of oxides in each component of the raw meal in the raw meal are: 60.0-74.0% for CaO, 60.0-74.0% for SiO 2 19.5-25.0%, Al 2 o 3 2.0-8.0%, Fe 3 o 4 4.5-7.0%. The clinker in this embodiment includes: tricalcium aluminate<5.0%, dicalcium silicate 15.0-40.0%, and tetracalcium aluminoferrite 16.0-20.0%.

Embodiment 2

[0016] This implementation proposes a preparation method of road Portland cement clinker prepared by using steel slag powder ingredients, which includes: 50-85 parts by weight of limestone, 5-20 parts by weight of steel slag powder, 5-15 parts by weight of sandstone, and powder The cement raw material composed of 5-15 parts by weight of coal ash is ground; then the raw material powder is calcined to obtain cement clinker. It effectively improves the firing quality of the clinker, and the vertical lift weight of the clinker is increased from 1300kg / L of general Portland cement clinker to 1450kg / L.

Embodiment 3

[0018] This implementation proposes low-heat and high-bending road Portland cement, which includes: cement clinker: 80-95%; slag powder: 0-10%; steel slag powder: 0-5%; pulverized coal Ash: 0-5%; Grinding aid: 0.5-1.0%; and Gypsum: 4.0-5.0%. The cement clinker is the cement clinker described in the examples prepared by the method described in Implementation 2. Wherein the gypsum is dihydrate gypsum, anhydrite or industrial by-product gypsum; the grinding aid is triethanolamine or talcum powder. The 28d flexural strength of the road portland cement described in this embodiment exceeds 9.0MPa; the 28d mortar wear is less than 2.5kg / m 2 ; The dry shrinkage rate of 28d mortar reaches 0.06%. The preparation method of the low-heat and high-bending road Portland cement described in this implementation is to mix the prepared low-heating and high-bending road Portland cement clinker with fly ash and (or) gypsum and ( Grinding aids) mixed together and ground together until the specif...

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Abstract

The invention relates to road silicate cement clinker and a preparation method thereof. The preparation method for the road silicate cement clinker comprises the following steps: grinding and roasting a cement raw material, wherein the cement raw material consists of the following substances in parts by weight: 50-85 parts of lime stones, 5-20 parts of steel slag powder, 5-15 parts of sandstones and 5-15 parts of coal ash. The preparation method can be used for recycling the steel slag, grinding the steel slag into powder after drying, and adopting the prepared steel slag powder as a cement production raw material to prepare road silicate cement clinker with low heat and high fracture resistance, so that the sintering quality of the clinker can be effectively improved after the steel slag powder is added. On the basis of meeting the technical requirements specified in the road silicate cement national standards, the road silicate cement clinker can be used for improving the fracture resistance and wear resistance of the cement, and lowering the hydration heat evolution and the dry shrinkage rate.

Description

technical field [0001] The invention relates to a cement clinker technology in the field of building materials, in particular to a road Portland cement clinker prepared by mixing steel slag powder and a preparation method of the road Portland cement. Background technique [0002] At present, general-purpose cement is Portland cement series, which is processed by the process of "two grinding and one burning" with appropriate raw materials, designed appropriate ratio and composition, and is the most widely produced and used hydraulic cementitious material. For a long time, the chemical composition and mineral composition of Portland cement have basically remained unchanged, and the technological development is mainly the production process and equipment. [0003] With the development of highway construction and the increase of highway mileage, the traffic volume and load of highways are also increasing day by day, and higher requirements are put forward for the quality and ser...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/147
CPCY02P40/10
Inventor 刘云刘超王旭方王显斌
Owner CHINA BUILDING MATERIALS ACAD
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