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Cement admixture and preparation method thereof

A technology of mixture and cement clinker, which is applied in the direction of cement production, etc., can solve the problems of easy cracks or damages on the ground, shortening the service life, and affecting the overall strength of concrete blocks, etc., so as to improve the impermeability and erosion resistance, and improve the compactness , the effect of convenient operation

Inactive Publication Date: 2018-06-29
桐乡市羔羊水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, after the existing cement is poured into concrete blocks in the later stage, after a period of use, the ground is prone to cracks or damage on the spot, which affects the overall strength of the concrete blocks and shortens its service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: A cement mixture, comprising the following components in parts by weight: 53 parts of cement clinker, 3 parts of phosphogypsum, 39 parts of fly ash, 13 parts of vitrified microbeads, 5 parts of mineral powder, nylon fiber 5 servings. Among them, fly ash includes 20% primary fly ash and 80% secondary fly ash. Phosphogypsum is a modified phosphogypsum, which is a cement retarder made from the waste phosphogypsum of wet-process phosphoric acid. Its main component is calcium sulfate dihydrate, monoclinic crystal, and its density is 2.3g / cm 3 .

[0044] Since unmodified phosphogypsum contains soluble phosphorus, mainly H 3 PO 4 、H 3 PO 4 and HPO 4 — Three forms. Soluble phosphorus can be adsorbed by dihydrate gypsum and clinker mineral crystals. When hydrating, soluble phosphorus and Ca in the solution 2+ reaction to generate insoluble Ca 3 (PO 4 ) 2 Adhering to the surface of gypsum, it hinders the further dissolution and hydration of cement clinke...

Embodiment 2

[0045] Example 2: A cement mixture comprising the following components in parts by weight: 70 parts of cement clinker, 3 parts of phosphogypsum, 22.4 parts of fly ash, 12 parts of vitrified microspheres, 4 parts of mineral powder, nylon fiber 5 servings. Among them, fly ash includes 25% primary fly ash and 75% secondary fly ash. Phosphogypsum is modified phosphogypsum.

Embodiment 3

[0046] Embodiment 3: A cement mixture, the difference from Embodiment 1 is that phosphogypsum is a mixture of natural gypsum and modified phosphogypsum.

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Abstract

The invention discloses a cement admixture and a preparation method thereof, and belongs to the technical field of cement production. The cement admixture is characterized by being prepared from the following components in parts by weight: 53 to 70 parts of cement clinker, 2.5 to 3.5 parts of ardealite, 22 to 39 parts of pulverized fuel ash, 10 to 15 parts of glass beads, 4.5 to 5.5 parts of mineral powder and 4.5 to 5.5 parts of nylon fiber. The preparation method of the cement admixture comprises the following steps: material preparation, burdening, smashing, secondary smashing treatment andstorage or packaging storage. According to the cement admixture disclosed by the invention, a cracking situation of post-cast concrete blocks is reduced, the compactness of concrete is increased, anobvious effect of increasing anti-seepage and anti-erosion capacity is obtained, and meanwhile, the service life of the cement admixture can also be favorably prolonged; the preparation method of thecement admixture is not only simple in steps and convenient to operate, but also is capable of increasing the compactness of the concrete and being beneficial for increasing the production efficiencyof cement.

Description

technical field [0001] The invention belongs to the technical field of cement production, and more specifically relates to a cement mixture and a preparation method thereof. Background technique [0002] Cement refers to powdery hydraulic inorganic gelling material. It can become a slurry after adding water and stirring, and can be hardened in the air or better hardened in water, and can firmly bind sand, stone and other materials together. In the early years the mixture of lime and volcanic ash is very similar to lime pozzolanic cement, use it to glue concrete which made of crushed stone. After hardening, the cement not only has high strength, but also can resist the erosion of fresh water or salt water. [0003] At present, the existing cement is divided into three types: general cement, special cement and characteristic cement. Among them, the most common cement is Portland cement. It is a hydraulic cementitious material made of Portland cement clinker, 0%-5% limestone...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/38C04B7/36
CPCC04B7/26C04B7/36C04B7/38Y02P40/10
Inventor 王六金
Owner 桐乡市羔羊水泥有限公司