CN102910852B - Coagulant for super sulfate cement - Google Patents

Coagulant for super sulfate cement Download PDF

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Publication number
CN102910852B
CN102910852B CN201210408637.5A CN201210408637A CN102910852B CN 102910852 B CN102910852 B CN 102910852B CN 201210408637 A CN201210408637 A CN 201210408637A CN 102910852 B CN102910852 B CN 102910852B
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ultra
cement
active
lithium slag
alumina
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CN102910852A (en
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高育欣
余保英
徐芬莲
赵晚群
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China Construction West Construction New Material Technology Co Ltd
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China Construction Ready Mixed Concrete Chengdu Co Ltd
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Abstract

The invention discloses a coagulant for cement, and in particular relates to a coagulant for super sulfate cement, and the coagulant comprises the following components in parts by weight: A. 60-90 parts of lithium slag and B. 10-40 parts of high aluminum admixture, wherein the total quality of three active ingredients including active SiO2, active Al2O3 and active CaO in the lithium slag accounts for more than 80% of the mass content of the lithium slag, and the mass content of the Al2O3 in the high aluminum admixture is 40-80% of the content of the high aluminum admixture. The coagulant for the super sulfate cement can be used for effectively shortening the initial setting time and the final setting time of the super sulfate cement, thus accelerating the early stage strength development and being better widely applied.

Description

A kind of setting accelerator for ultra-sulphate cement
Technical field
The present invention relates to a kind of accelerator for cement slurry, be specifically related to a kind of setting accelerator for ultra-sulphate cement.
Background technology
Cement is a kind of hydraulicity inorganic coagulation material, is mostly Powdered, and Qi Jiashui stirs into after slurry, can in air or water, harden, simultaneously also can the solid materials such as sandstone is firmly cemented together.Ultra-sulphate cement belongs to a kind of of cement, is also slag sulphate cement, and it is a kind of slag by 75-85%, and the alkaline components of the vitriol of 10-20% (activator) class and 1-5% mixes and the hydraulic cementing materials that makes.
Ultra-sulphate cement is sulphate activation due to what just adopt, and is aided with the principle that alkaline matter excites, so it has excellent sulphate-corrosion resistance energy, and clinker dosage is few, CO 2the advantages such as quantity discharged is low, low in the pollution of the environment.
Ultra-sulphate cement, when adopting sulphate activation, generally can adopt dihydrate gypsum, anhydrite, and phosphogypsum, fluorgypsums etc. are as vitriol activator; Because the add-on of vitriol activator in ultra-sulphate cement is larger, thereby cause its presetting period, final setting time is obviously longer than Portland cement.For example, when adopting anhydrite as vitriol activator, the about 10h of final setting time of gained ultra-sulphate cement; When adopting phosphogypsum as vitriol activator, the initial set of gained ultra-sulphate cement and final setting time are all more than 24h.
In view of the foregoing, existing ultra-sulphate cement generally has initial set and final setting time is longer, causes the lower defect of early strength development, has therefore had a strong impact on the application of such cement.
Summary of the invention
In view of this, the invention provides a kind of setting accelerator for ultra-sulphate cement, it can shorten presetting period and the final setting time of ultra-sulphate cement effectively, thereby accelerates its early stage strength development, promotes its widespread use.
For solving above technical problem, technical scheme of the present invention be adopt lithium slag as component for promoting the setting accelerator of ultra-sulphate cement setting and harden.
Preferably, described lithium slag and high alumina adulterant jointly as additive for the preparation of the setting accelerator that promotes ultra-sulphate cement setting and harden.
Compared with prior art, the principle of the invention is as follows:
The present invention adopt lithium slag as additive for the preparation of the setting accelerator that promotes ultra-sulphate cement setting and harden; Lithium slag of the present invention is the industrial residue producing in Production By Sulfuric Acid Process Quilonum Retard process, is a kind of cement or concrete adulterant with the vesicular structure of larger internal surface area.Utilize cement prepared by lithium slag or concrete to have that hydration heat is low, the feature of good water-retaining property, and lithium slag can obviously improve the interface structure of adulterant slurry, improve mechanical property and the endurance quality of slurry.
Abundant research by the inventor is found, lithium slag can be used as the setting accelerator of ultra-sulphate cement, in ultra-sulphate cement, add after lithium slag, can effectively shorten presetting period and the final setting time of ultra-sulphate cement, thereby accelerate the early stage strength development of gained ultra-sulphate cement, promote its widespread use.Through the inventor, study discovery, in lithium slag, contain a large amount of activating oxide compositions, especially active SiO 2, active A l 2o 3and active CaO, above-mentioned three kinds of activeconstituentss account for the more than 80% of lithium slag mass content; In lithium slag contained above-mentioned three kinds of activeconstituentss can with ultra-sulphate cement in the sclerosis jointly under the effect of water and air of vitriol activator, thereby accelerate the hydration and hardening of ultra-sulphate cement.
Further, the present invention preferably adopts lithium slag and high alumina adulterant is come for the preparation of the mode that promotes the setting accelerator of ultra-sulphate cement hydration and hardening as additive jointly; In the setting accelerator of ultra-sulphate cement, common interpolation lithium slag and high alumina adulterant can improve the short solidifying effect of setting accelerator effectively.
High alumina adulterant of the present invention can be that at least one is selected from all kinds of aluminate gelled materials such as bauxitic clay, alunite etc. and ferro-aluminate cement, aluminosulfate cement.
The present invention also aims to provide a kind of setting accelerator for ultra-sulphate cement, the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 60-90 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 10-40 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
In setting accelerator of the present invention, contain 60-90 weight part lithium slag, active SiO in described lithium slag 2, active A l 2o 3with the mass content of active CaO be more than 80% and 10-40 weight part high alumina adulterant; Setting accelerator of the present invention adopts the hydration and hardening of the promotion ultra-sulphate cement that the ratio of above-mentioned A, B component can be better, thereby further shorten presetting period and the final setting time of ultra-sulphate cement, accelerate the early stage strength development of gained ultra-sulphate cement, promote its widespread use.
Preferably, in described B component, high alumina adulterant is selected from all kinds of aluminate gelled materials such as the natural resource such as bauxitic clay, alunite or ferro-aluminate cement, aluminosulfate cement at least one.
Preferably, the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 80-90 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 10-20 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
Preferably, the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 70-80 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 20-30 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
Preferably, the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 60-70 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 30-40 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
Further, the setting accelerator for ultra-sulphate cement of the present invention preferably adopts described B component high alumina adulterant at least one, to be selected from all kinds of aluminate gelled materials such as the natural resource such as bauxitic clay, alunite or ferro-aluminate cement, aluminosulfate cement.The present invention preferably adopts above-mentioned four kinds of high alumina adulterant kinds compared to other high alumina adulterant, and it has better short solidifying effect.
Further, setting accelerator for ultra-sulphate cement of the present invention preferably adopts described A component lithium slag can also include active oxidation lithium, Lithium Oxide 98min is compared to calcium oxide, and hydration reaction more easily occurs for the former, thereby can further accelerate the aquation of cement; Activated alumina, calcium oxide etc. can react with silicon-dioxide better, promote the formation of calcium aluminate class early hydration product.
Further, the setting accelerator for ultra-sulphate cement of the present invention preferably adopts the described setting accelerator for ultra-sulphate cement to include following component, each component by weight:
A, 80-90 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 10-20 part high alumina adulterant, high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
The present invention preferably adopts after above-mentioned enforcement ratio, and gained setting accelerator has better short solidifying effect for the ultra-sulphate cement with anhydrite and dihydrate gypsum are prepared as vitriol activator.
Further, the setting accelerator for ultra-sulphate cement of the present invention preferably adopts the described setting accelerator for ultra-sulphate cement to include following component, each component by weight:
A, 70-80 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 20-30 part high alumina adulterant, high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
The present invention preferably adopts after above-mentioned enforcement ratio, and gained setting accelerator has better short solidifying effect for the ultra-sulphate cement with calcined phosphogypsum is prepared as vitriol activator; Better, the present invention adopts after above-mentioned enforcement ratio, and the ultra-sulphate cement that gained setting accelerator is prepared as vitriol activator for the phosphogypsum that is used in 200-800 ℃ of calcining has better short solidifying effect.
Further, the setting accelerator for ultra-sulphate cement of the present invention preferably adopts the described setting accelerator for ultra-sulphate cement to include following component, each component by weight:
A, 60-70 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 30-40 part high alumina adulterant, high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
The present invention preferably adopts after above-mentioned enforcement ratio, and gained setting accelerator has better short solidifying effect for the ultra-sulphate cement with phosphogypsum is prepared as vitriol activator.
The preparation method of the setting accelerator for ultra-sulphate cement of the present invention can be the existing common method of preparing setting accelerator, is about to it and is prepared into pulvis or other solid preparations etc.; Its preparation method can be existing co-grinding preparation method.In use, its massfraction that accounts for cement can be 1-10% to setting accelerator for ultra-sulphate cement of the present invention.
Embodiment
In order to make those skilled in the art understand better technical scheme of the present invention, below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
To after lithium ground-slag mill, obtain embodiment 1, volume accounts for 10% of ultra-sulphate cement massfraction.
Embodiment 2
According to following weight ratio, take each material:
A, 60 parts of lithium slags, B, 40 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 7 after combined grinding, and volume accounts for 2% of ultra-sulphate cement massfraction.
Embodiment 3
According to following weight ratio, take each material:
A, 70 parts of lithium slags, B, 30 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 3 after combined grinding, and volume accounts for 7% of ultra-sulphate cement massfraction.
Embodiment 4
According to following weight ratio, take each material:
A, 75 parts of lithium slags, B, 25 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 4 after combined grinding, and volume accounts for 3% of ultra-sulphate cement massfraction.
Embodiment 5
According to following weight ratio, take each material:
A, 80 parts of lithium slags, B, 20 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 5 after combined grinding, and volume accounts for 7% of ultra-sulphate cement massfraction.
Embodiment 6
According to following weight ratio, take each material:
A, 85 parts of lithium slags, B, 15 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 6 after combined grinding, and volume accounts for 8% of ultra-sulphate cement massfraction.
Embodiment 7
To after high alumina adulterant combined grinding, obtain embodiment 2, volume accounts for 2% of ultra-sulphate cement massfraction.
Embodiment 8
According to following weight ratio, take each material:
A, 90 parts of lithium slags, B, 10 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 8 after combined grinding, and volume accounts for 3% of ultra-sulphate cement massfraction.
Embodiment 9
According to following weight ratio, take each material:
A, 95 parts of lithium slags, B, 5 parts of high alumina adulterants;
The material that weighs gained is carried out obtaining embodiment 9 after combined grinding, and volume accounts for 5% of ultra-sulphate cement massfraction.
Using above-mentioned gained embodiment 1-9 respectively with phosphogypsum as the ultra-sulphate cement (category-A) of vitriol activator, ultra-sulphate cement (category-B) with modified ardealite as vitriol activator, and with anhydrite, dihydrate gypsum mixes mutually as the ultra-sulphate cement (C class) of vitriol activator, adopt GB/T175-2007 < < general purpose portland cement > > alignment to carry out time of coagulation and strength trial, and not add the A of any setting accelerator, B, C tri-class ultra-sulphate cements are as blank group, monitor respectively presetting period of each embodiment and blank group cement and final setting time with and 3 days and 28 days intensity, acquired results is listed in table one.
Table one
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. for a setting accelerator for ultra-sulphate cement, it is characterized in that: the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 60-90 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 10-40 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
2. the setting accelerator for ultra-sulphate cement according to claim 1, is characterized in that: the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 80-90 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 10-20 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
3. the setting accelerator for ultra-sulphate cement according to claim 1, is characterized in that: the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 70-80 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 20-30 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
4. the setting accelerator for ultra-sulphate cement according to claim 1, is characterized in that: the described setting accelerator for ultra-sulphate cement includes following component, each component by weight:
A, 60-70 part lithium slag, active SiO in described lithium slag 2, active A l 2o 3account for the more than 80% of lithium slag mass content with three kinds of activeconstituentss of active CaO;
B, 30-40 part high alumina adulterant, Al in described high alumina adulterant 2o 3mass content be 40%-80%.
CN201210408637.5A 2012-10-24 2012-10-24 Coagulant for super sulfate cement Active CN102910852B (en)

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Publication number Priority date Publication date Assignee Title
CN105967541B (en) * 2016-05-11 2017-12-29 武汉理工大学 A kind of sulphate aluminium cement coagulant and preparation method thereof
CN108395138A (en) * 2018-04-08 2018-08-14 赵顺全 A kind of accelerator for cement slurry
CN109942211A (en) * 2019-04-22 2019-06-28 郑州升达经贸管理学院 A method of improving gypsum-slag cements early strength

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JP2004002079A (en) * 2002-05-30 2004-01-08 Nissan Chem Ind Ltd High strength cement composition
CN101265070A (en) * 2008-04-17 2008-09-17 高康 Sludge solidifying agent and application thereof
CN101337779B (en) * 2008-07-11 2010-11-10 南京师范大学 Additive of composite portland cement and producing method thereof
CN101671133B (en) * 2009-09-30 2012-03-21 永州市中大特种水泥有限责任公司 Modified low-alkalinity sulphoaluminate cement

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Address after: 610052 Sung Kang Road, Chengdu, Sichuan, No. 18, No.

Patentee after: The construction of the West southwest Construction Co. Ltd.

Address before: High tech Zone Fucheng Road in Chengdu city of Sichuan province 610041 No. 399 Tianfu New Valley No. 6 Building 8 floor in the construction of Commercial Concrete Co. Ltd. Chengdu

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