阅读说明：本技术 一种复合水泥及其制备方法 (Composite cement and preparation method thereof ) 是由 刘品 于 2019-11-21 设计创作，主要内容包括：一种复合水泥,以重量份数计,其包括：熟料50-80份；矿渣20-30份,为铅渣、锌渣、铁尾矿和粉煤灰中的至少一种；石灰石3-5份；石膏8-10份；外掺料5-8份；所述外掺料包括硅灰、聚乙二醇和三异丙醇胺。本发明的复合水泥由于外掺料的使用能够提高本发明复合水泥的固化强度。(The composite cement comprises the following components in parts by weight: 50-80 parts of clinker; 20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash; 3-5 parts of limestone; 8-10 parts of gypsum; 5-8 parts of an admixture; the admixture comprises silica fume, polyethylene glycol and triisopropanolamine. The composite cement of the invention can improve the curing strength of the composite cement due to the use of the admixture.)

1. The composite cement is characterized by comprising the following components in parts by weight:

50-80 parts of clinker;

20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash;

3-5 parts of limestone;

8-10 parts of gypsum;

5-8 parts of an admixture;

the admixture comprises silica fume, polyethylene glycol and triisopropanolamine.

2. The composite cement of claim 1, wherein: the silica fume accounts for 40-60% of the total weight of the admixture, and the calcium methacrylate hydrate accounts for 10-20% of the total weight of the admixture.

3. The composite cement of claim 2, wherein: an alkylene oxide adduct of sorbitol or/and N, N, N ', N' -tetrakis (2-hydroxypropyl) ethylenediamine may also be added to the admixture.

4. The composite cement of claim 1, wherein: the gypsum is natural gypsum or chemical by-product gypsum.

5. The composite cement of claim 1, wherein: also comprises 0-3 parts of lime and/or chemical activator.

6. The preparation method of the composite cement is characterized by comprising the following steps: grinding clinker, slag, limestone and gypsum together or obtaining a primary product of composite cement; then adding the admixture and uniformly mixing to obtain the composite cement;

the composite cement comprises the following components in parts by weight:

50-80 parts of clinker;

20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash;

3-5 parts of limestone;

8-10 parts of gypsum;

5-8 parts of an admixture;

the admixture comprises silica fume, polyethylene glycol and triisopropanolamine.

7. The method for preparing composite cement according to claim 6, characterized in that: 0-3 parts of lime and/or chemical excitant can be added during grinding.

8. The method for preparing composite cement according to claim 6, characterized in that: the average grain diameter of the cement primary product after grinding is 10-20 microns.

Technical Field

The invention relates to the field of building materials, in particular to slag-based composite cement with high curing strength and a preparation method thereof.

Background

China has very abundant mineral resources, and along with the development of the society, the use amount of the industry for mineral products is more and more, and a large amount of slag is generated; the reports of using slag to make cement have been started for a long time, but the cement made of slag has not been used in a large amount at present because the strength of the cement made of slag is often not very high, which limits the application of the cement containing slag, and the content of slag in the cement containing slag is lower and is generally about 10% at present because too much slag affects the curing strength of the final cement.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the composite cement with high curing strength and high slag content and the preparation method thereof.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: the composite cement comprises the following components in parts by weight:

50-80 parts of clinker;

20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash;

3-5 parts of limestone;

8-10 parts of gypsum;

5-8 parts of an admixture;

the admixture comprises silica fume, polyethylene glycol and triisopropanolamine.

Preferably, the silica fume accounts for 40-60% of the total weight of the admixture, and the calcium methacrylate hydrate accounts for 10-20% of the total weight of the admixture.

The composite cement may also contain alkylene oxide adduct of sorbitol and/or N, N, N ', N' -tetra (2-hydroxypropyl) ethylenediamine.

Preferably, the gypsum of the composite cement is natural gypsum or gypsum of chemical byproducts.

The composite cement preferably further comprises 0-3 parts of lime and/or a chemical activator.

A preparation method of composite cement comprises grinding clinker, slag, limestone and gypsum together or obtaining a primary product of the composite cement; then adding the admixture and uniformly mixing to obtain the composite cement;

the composite cement comprises the following components in parts by weight:

50-80 parts of clinker;

20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash;

3-5 parts of limestone;

8-10 parts of gypsum;

5-8 parts of an admixture;

the admixture comprises silica fume, polyethylene glycol and triisopropanolamine.

In the preparation method of the composite cement, preferably, 0-3 parts of lime and/or a chemical activator can be added during grinding.

In the preparation method of the composite cement, preferably, the average particle size of the ground cement primary product is 10-20 microns.

Compared with the prior art, the invention has the advantages that: the composite cement of the invention can improve the curing strength of the composite cement due to the use of the admixture.

Detailed Description

In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

The composite cement comprises the following components in parts by weight:

50-80 parts of clinker;

20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash;

3-5 parts of limestone;

8-10 parts of gypsum;

5-8 parts of an admixture;

the admixture comprises silica fume, polyethylene glycol and triisopropanolamine.

In the invention, the silica fume accounts for 40-60% of the total weight of the admixture, and the calcium methacrylate hydrate accounts for 10-20% of the total weight of the admixture.

In the present invention, an alkylene oxide adduct of sorbitol or/and N, N, N ', N' -tetrakis (2-hydroxypropyl) ethylenediamine may also be added to the admixture.

In the invention, the gypsum is natural gypsum or chemical by-product gypsum.

In the invention, 0-3 parts of lime and/or chemical activator are also included.

A preparation method of composite cement comprises grinding clinker, slag, limestone and gypsum together or obtaining a primary product of the composite cement; then adding the admixture and uniformly mixing to obtain the composite cement;

the composite cement comprises the following components in parts by weight:

50-80 parts of clinker;

20-30 parts of slag, namely at least one of lead slag, zinc slag, iron tailings and fly ash;

3-5 parts of limestone;

8-10 parts of gypsum;

5-8 parts of an admixture;

the admixture comprises silica fume, polyethylene glycol and triisopropanolamine.

In the invention, 0-3 parts of lime and/or chemical excitant can be added during grinding.

In the invention, the average grain diameter of the ground cement primary product is 10-20 microns.