P*S*A grade retarded cement and preparation method thereof as well as concrete road

A retarding and cement technology, applied in the direction of roads, roads, cement production, etc., can solve the problem of insufficient cement retarding time, and achieve the effect of high strength growth rate, good durability and strong corrosion resistance

Inactive Publication Date: 2019-03-22
山东永正水泥有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a P·S·A grade retarded cement, aiming at improving the problem that the retarding time of the existing cement is not long enough

Method used

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  • P*S*A grade retarded cement and preparation method thereof as well as concrete road
  • P*S*A grade retarded cement and preparation method thereof as well as concrete road

Examples

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preparation example Construction

[0026] A preparation method of P·S·A grade retarded cement, comprising mixing and grinding Portland cement clinker, granulated blast furnace slag powder, fly ash and desulfurized gypsum to obtain P·S·A grade retarded cement cement. Preferably, the mixed grinding has a specific surface area of ​​340-400m 2 / kg of powder. Then it is transported to the cement silo by the hoist for storage. The pavement paved with cement in this fineness range is not prone to cracks.

[0027] A preparation method of P·S·A grade retarded cement, comprising grinding Portland cement clinker to obtain Portland cement clinker fine powder, and grinding granulated blast furnace slag powder to obtain granulated blast furnace slag Grinding fly ash to get fly ash fine powder, grinding desulfurized gypsum to get desulfurized gypsum fine powder, then Portland cement clinker fine powder, granulated blast furnace slag fine powder, pulverized coal Ash fine powder and desulfurized gypsum fine powder are mixed...

Embodiment 1

[0031] A P·S·A grade retarded cement, the mass percentage of raw materials is composed of 51% Portland cement clinker, 37% granulated blast furnace slag powder, 6% fly ash and 6% desulfurized gypsum. Among them, the components in Portland cement clinker include 3.8:218.9:45.6:31.8:661.4:33.2:5:0.23 LOSS, SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO and SO 3 . The components in fly ash include: 98:380:380:53.8:48.7:5.3:29.3:0.2 LOSS, SiO 2 、Al 2 o 3 , Fe2 o 3 , CaO, MgO, SO 3 and Cl - . The loss on ignition of granulated blast furnace slag powder is -0.7%, and the medium SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, SO 3 and Cl - The mass ratio is: 350:155:16:380:90:7.5:0.3.

[0032] A preparation method of P·S·A grade retarded cement. Take 510kg of Portland cement clinker, 370kg of granulated blast furnace slag powder, 60kg of fly ash, and 60kg of desulfurized gypsum, and grind them in a cement mill to obtain The specific surface area is 340~400m 2 / kg powder is P·S·A g...

Embodiment 2

[0034] A P·S·A grade retarded cement, the mass percentage of raw materials is composed of 59% Portland cement clinker, 32% granulated blast furnace slag powder, 4% fly ash and 6% desulfurized gypsum. Among them, the components in Portland cement clinker include: 4:218:46.5:30:663:33.5:4.5:0.2 LOSS, SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, SO 3 and Cl - . The components in fly ash include: 90:400:350:54.2:47:5.5:29.6:0.2 LOSS, SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, SO 3 and Cl - . The loss on ignition of granulated blast furnace slag powder is -0.65%, and the medium SiO of granulated blast furnace slag powder 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, SO 3 and Cl - The mass ratio is: 300:165:14:430:80:8.5:0.2.

[0035] A preparation method of P.S.A grade retarded cement. Take 590kg of the above Portland cement clinker, 320kg of granulated blast furnace slag powder, 40kg of fly ash, and 60kg of desulfurized gypsum, and grind them in a cement mill to obtain The specif...

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Abstract

The invention provides P*S*A grade retarded cement, and belongs to P*S*A grade retarded cement. The retarded cement comprises the following raw materials by weight percentage: 51% to 59% of Portland cement clinker, 32% to 37% of granulated blast furnace slag powder, 4% to 6% of fly ash and 4% to 6% of desulfurized gypsum. The invention also provides a preparation method of the P*S*A grade retardedcement, and the method comprises the following steps: mixing and grinding the Portland cement clinker, the fly ash, the granulated blast furnace slag powder and the desulfurization gypsum, or grinding after mixing. The P*S*A grade retarded cement prepared with the preparation method is long in retarded time.

Description

technical field [0001] The invention relates to the technical field of cement preparation, in particular to a P·S·A grade retarded cement, a preparation method thereof and a concrete road. Background technique [0002] Cement, powdery hydraulic inorganic gelling material. Add water and stir to form a slurry, which can harden in the air or better harden in water, and can firmly bond sand, stone and other materials together. It is a very important material in construction. [0003] At present, with the rapid development of high-grade highway traffic modernization, the development of cement concrete pavement has been placed in an important position in road construction. Due to the long time for road construction, mixing, paving, and compacting, it must be completed before the cement sets. Completed, the user needs to extend the cement setting time according to the site construction conditions. Generally, according to the construction requirements, the initial setting time of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26E01C7/14
CPCC04B7/26E01C7/14E01C7/142Y02P40/10
Inventor 窦霆张青青
Owner 山东永正水泥有限公司
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