CN104944824B - A kind of cement concrete early strength agent and early strength water-reducing agent - Google Patents
A kind of cement concrete early strength agent and early strength water-reducing agent Download PDFInfo
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- CN104944824B CN104944824B CN201510410195.1A CN201510410195A CN104944824B CN 104944824 B CN104944824 B CN 104944824B CN 201510410195 A CN201510410195 A CN 201510410195A CN 104944824 B CN104944824 B CN 104944824B
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- early strength
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Abstract
The present invention relates to a kind of cement concrete early strength agent, the early strength agent contains nano-calcium carbonate and light calcium carbonate powder, it is preferred that the early strength agent is also containing one or two in calcium formate, calcium nitrate.In the early strength agent, each component and mass fraction are as follows：20～67 parts of nano-calcium carbonate；33～80 parts of light calcium carbonate powder；0～10 part of calcium formate；0～10 part of calcium nitrate.Compared with existing early strength agent, its maximum advantage is not introduce harmful ion to early strength agent according to the present invention, to the environmental nonpollution for using, nontoxic, and can equally improve cement concrete early strength, shortens initial set and the final setting time of concrete.The invention further relates to a kind of early strength water-reducing agent containing the early strength agent, the early strength water-reducing agent each component and mass percent are as follows：Accelerating component 60%～75%；Diminishing component 25%～40%, the early strength water-reducing agent have early strong, diminishing, potentiation well, and water-reducing rate is big, can significantly improve the early strength of concrete, not affect later strength.
Description
Technical field
The invention belongs to building material technical field, is related to a kind of cement concrete early strength agent and early strength water-reducing agent.
Background technology
How in the winter time concrete early strength agent refers to the additive that can improve early age strength of concrete, construction or rush repair
Shi Caiyong, the more conventional concrete early strength agent of current China mainly have villaumite system, sulfate system, carbonate system, organic system,
Mineral substance and complex accelerator, the most frequently used several classes mainly include：
(1) chloride salt early strength agent：Mainly there are calcium chloride, sodium chloride, potassium chloride, amine oxide, ferrum oxide, aluminium oxide etc., chlorine
Salt early strength agent has a good early strength function, and wherein calcium chloride early strong effect is good and low cost, most widely used.
(2) Sulfateses early strength agent：Mainly there are sodium sulfate (i.e. Matrii Sulfas Exsiccatus), sodium thiosulfate, calcium sulfate, aluminum sulfate, sulfur
Sour aluminum potassium etc..Wherein sodium sulfate application is more.
(3) organic species early strength agent：Organic amine early strength agent mainly has triethanolamine (abbreviation TEA), triisopropanolamine (letter
Claim T P), diethanolamine etc., wherein early strong effect is preferred with triethanolamine.
In engineering, above a few class early strength agent can singly be mixed or compound.Villaumite system early strength agent has obvious action of rust to reinforcing bar,
Therefore the early strength agent application of chloride system is little.Sulfate system early strength agent is also due to cause concrete " scum ", and there is alkali
Aggregate reaction endangers risk, and its application is also very restricted.Some other species early strength agent, or there is early strong effect not
Good, or affect later strength, or there are raw material sources, the problems such as difficult production high cost.
In the presence of being necessary to develop new early strength agent species to avoid prior art for building material technical field
Defect.
Content of the invention
In view of this, it is an object of the invention to provide a kind of cement concrete early strength agent, the early strength agent can improve water
The early strength of cement concrete, does not reduce later strength, and without harmful ion, will not increase generation alkali-aggregate reaction and steel
Muscle corrosion endangers；Another object of the present invention is to providing a kind of early strength water-reducing agent with the early strength agent as Main Components, the morning
Strength water-reducing agent has early strong, diminishing, potentiation well, and water-reducing rate is big, and the early stage and later stage that can significantly improve concrete is strong
Degree.
For reaching above-mentioned purpose, the present invention provides following technical scheme：
A kind of cement concrete early strength agent, the early strength agent contain nano-calcium carbonate and light calcium carbonate powder.
Preferably, the early strength agent is also containing one or two in calcium formate, calcium nitrate.
Preferably, in the early strength agent, each component and mass fraction are as follows：
Preferably, in the early strength agent, each component and mass fraction are as follows：
62 parts of nano-calcium carbonate；
33 parts of light calcium carbonate powder；
5 parts of calcium formate.
A kind of early strength water-reducing agent, the early strength water-reducing agent contain the cement concrete early strength agent.
Preferably, in the early strength water-reducing agent, each component and mass percent are as follows：
Accelerating component 60%～75%；
Diminishing component 25%～40%.
The diminishing component is naphthalene water reducer or poly carboxylic acid series water reducer.
Nano-calcium carbonate can improve early strength its principle of cement concrete following several respects：First, nano-sized carbon
Sour calcium can play a part of ultra-fine micro-aggregate, the space around filling concrete clinker particles, make structure become more closely knit from
And improve intensity；Secondly as the skin effect of nanoparticle, hydrated calcium silicate gel can be with nano-calcium carbonate as nucleus life
Long, such that it is able to make hydrated calcium silicate gel develop into network structure with nano-calcium carbonate as core, make inside cement concrete
More closely knit, so as to improve intensity；Again, nano-calcium carbonate can substantially reduce Ca (OH)2Interface dense distribution and
Align, contribute to the combination property for improving interface；Finally, nano-calcium carbonate can promote C3A generates calcium with Gypsum Fibrosum reaction
Alumen, it is also one of the reason for early strength is improved that entringite generates carbon calcium aluminate with nano-calcium carbonate reaction again.And early strong
Light calcium carbonate powder is introduced in component then can further improve the compaction rate of cement concrete so as to the early stage for improving cement concrete is strong
Degree.
The beneficial effects of the present invention is：Without in prior art early strength agent one in early strength agent component disclosed in this invention
A little harmful ions, it is to avoid early strength agent of the prior art to the action of rust of reinforcing bar or causes concrete " scum effect ",
And cement concrete early strength can be improved by early strength agent disclosed in this invention, when the initial set and final set of shortening concrete
Between, efficiency of construction is improved, and can not be weakened compared to its early epistasis of various classification early strength agent in prior art.
Specific embodiment
Below the preferred embodiments of the present invention are described in detail.
Embodiment 1
A kind of early strength agent, its component and mass fraction are：62 parts of nano-calcium carbonate；33 parts of light calcium carbonate powder；5 parts of calcium formate.
Be mixed uniformly by above-mentioned each component and mass fraction, and keep drying, early strength agent and water are mixed, then by its
In adding to cement concrete, the early strength agent of addition is 1 with the mass ratio of cement in cement concrete:100.
Embodiment 2
A kind of early strength agent, its component and mass fraction are：48 parts of nano-calcium carbonate；48 parts of light calcium carbonate powder；4 parts of calcium nitrate.
Be mixed uniformly by above-mentioned each component and mass fraction, and keep drying, early strength agent and water are mixed, then by its
In adding to cement concrete, the early strength agent of addition is 1 with the mass ratio of cement in cement concrete:100.
Embodiment 3
A kind of early strength agent, its component and mass fraction are：32 parts of nano-calcium carbonate；65 parts of light calcium carbonate powder；3 parts of calcium nitrate.
Be mixed uniformly by above-mentioned each component and mass fraction, and keep drying, early strength agent and water are mixed, then by its
In adding to cement concrete, the early strength agent of addition is 1 with the mass ratio of cement in cement concrete:100.
Embodiment 4
A kind of early strength water-reducing agent, its component and mass percent are：Nano-calcium carbonate 31%；Light calcium carbonate powder 32%；Calcium formate
4%；Polycarboxylic acid series high efficiency water reducing agent 33%.
Above-mentioned each component is weighed by mass percentage, the early strength agent accelerating component is dispersed in containing polycarboxylic acids high efficiency
In the aqueous solution of water reducer, stir, add in cement concrete, cement in the early strength water-reducing agent of addition and cement concrete
Mass ratio be 1.5：100.
Embodiment 5
A kind of early strength water-reducing agent, its component and mass percent are：Nano-calcium carbonate 30%；Light calcium carbonate powder 30%；Calcium formate
4%；Calcium nitrate 3%；Polycarboxylic acid series high efficiency water reducing agent 33%.
Above-mentioned each component is weighed by mass percentage, the early strength agent accelerating component is dispersed in containing naphthalene series high-efficiency diminishing
In the aqueous solution of agent, stir, add in cement concrete, the matter of cement in the early strength water-reducing agent of addition and cement concrete
Amount is than being 1.5：100.
Embodiment 6
A kind of early strength water-reducing agent, its component and mass percent are：Nano-calcium carbonate 33%；Light calcium carbonate powder 33%；Polycarboxylic acids
Series high-efficiency water-reducing agent 34%.
Above-mentioned each component is weighed by mass percentage, the early strength agent accelerating component is dispersed in containing polycarboxylic acids high efficiency
In the aqueous solution of water reducer, stir, add in cement concrete, cement in the early strength water-reducing agent of addition and cement concrete
Mass ratio be 1.5：100.
In above-mentioned cement concrete, water is 0.3 with the mass ratio of cement, by embodiment 4, subtracting containing early by force obtained by 5,6
The cement mortar of water preparation, tests cement mortar strength according to GB/T 17671-1999, and blank representative is not incorporated into early strength agent, and with mix
Enter calcium chloride one group is contrasted, measured value such as table 1 below：
The comparative test result of cement mortar strength tested by table 1
As can be seen from Table 1, using the early strength water-reducing agent of the preparation of embodiment 4,5,6 and using of the prior art containing chlorination
The early strength water-reducing agent of calcium group was essentially identical in 1 day age attainable concrete bending and compressive strength, 3 days, 7 days, 28 day age
During the phase, early strength water-reducing agent attainable agent on crack resistance of concrete folding compressive strength rate prepared by embodiment 4,5,6 contains the morning of calcium chloride group
Strength water-reducing agent effect will also be got well, and contrast with blank group, and its effect becomes apparent from.This explanation early strength agent disclosed in this invention
Not only avoid in component and to the action of rust of reinforcing bar or cause coagulation containing some harmful ions in prior art early strength agent
Native " scum effect ", and cement concrete early strength can be improved by early strength agent disclosed in this invention, shorten concrete
Initial set and final setting time, improve efficiency of construction, and its early epistasis can not weaken on the contrary compared to early strength agent in prior art
There is more preferable effect.
Finally illustrate, preferred embodiment above is only unrestricted in order to technical scheme to be described, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
In form and various changes are made to which in details, without departing from claims of the present invention limited range.
Claims (5)
1. a kind of cement concrete early strength agent, it is characterised in that：In the early strength agent, each component and mass fraction are as follows：
20 ~ 67 parts of nano-calcium carbonate；
33 ~ 80 parts of light calcium carbonate powder；
0 ~ 10 part of calcium formate；
0 ~ 10 part of calcium nitrate.
2. cement concrete early strength agent according to claim 1, it is characterised in that：Each component and mass parts in the early strength agent
Number is as follows：
62 parts of nano-calcium carbonate；
33 parts of light calcium carbonate powder；
5 parts of calcium formate.
3. a kind of early strength water-reducing agent, it is characterised in that：The early strength water-reducing agent contains cement described in any one of claim 1 ~ 2 to be mixed
Solidifying soil early strength agent.
4. early strength water-reducing agent according to claim 3, it is characterised in that：Each component and quality percentage in the early strength water-reducing agent
Than as follows：
Accelerating component 60% ~ 75%；
Diminishing component 25% ~ 40%.
5. early strength water-reducing agent according to claim 4, it is characterised in that：The diminishing group is divided into naphthalene water reducer or polycarboxylic acids
Based water reducer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510410195.1A CN104944824B (en) | 2015-07-10 | 2015-07-10 | A kind of cement concrete early strength agent and early strength water-reducing agent |
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| CN201510410195.1A CN104944824B (en) | 2015-07-10 | 2015-07-10 | A kind of cement concrete early strength agent and early strength water-reducing agent |
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| CN104944824B true CN104944824B (en) | 2017-03-15 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105503020B (en) * | 2015-12-30 | 2018-01-30 | 卓达新材料科技集团威海股份有限公司 | A kind of early strength agent for Portland cement fiberboard |
| CN106116217A (en) * | 2016-06-24 | 2016-11-16 | 桂林华越环保科技有限公司 | A kind of concrete light wall panel early strength water-reducing agent |
| CN107555829A (en) * | 2017-08-14 | 2018-01-09 | 山西格瑞特建筑科技股份有限公司 | A kind of nucleus type for concrete promotees solidifying early strength agent and preparation method thereof |
| CN107601953A (en) * | 2017-10-30 | 2018-01-19 | 兰新良 | A kind of cement products early strength agent |
| CN107673650A (en) * | 2017-10-30 | 2018-02-09 | 兰新良 | A kind of concrete hollow block early strength agent |
| CN107840591B (en) * | 2017-12-01 | 2020-06-26 | 北京怡居建筑科技有限公司 | Cement concrete and application thereof in building wall |
| CN108249845A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of Organic-inorganic composite early strength agent and the self-compacting concrete prepared using the early strength agent |
| CN109250979A (en) * | 2018-08-21 | 2019-01-22 | 苏州混凝土水泥制品研究院有限公司 | It is a kind of for the composition of super high-early concrete prefabricated component and its super high-early concrete prefabricated component of preparation |
| CN109250941A (en) * | 2018-09-07 | 2019-01-22 | 青岛颢天绿色建筑科技有限公司 | A kind of regenerated aggregate concrete specific complex additive |
| CN109485291A (en) * | 2019-01-07 | 2019-03-19 | 山西佳维新材料股份有限公司 | A kind of early diminishing complexing agent and preparation method thereof by force of novel poly-carboxylic high-performance nanometer seed crystal |
| CN110683785B (en) * | 2019-11-14 | 2021-10-22 | 江苏博思通新材料有限公司 | Concrete crystal nucleus early strength agent |
| CN113429170B (en) * | 2021-08-25 | 2021-11-12 | 奥王建筑材料科技有限公司 | Anti-crack type construction waste recycled concrete wallboard |
| CN113912322A (en) * | 2021-10-21 | 2022-01-11 | 杭州构建新型材料有限公司 | Early-strength crystal nucleus type polycarboxylate superplasticizer and production method thereof |
| CN113880491B (en) * | 2021-11-11 | 2023-06-13 | 吉林省黄腾建材有限公司 | Early strength agent for concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101403249A (en) * | 2008-11-17 | 2009-04-08 | 金勇云 | Anti-crack type energy-saving covering layer used for building exterior wall surface |
| CN102432254B (en) * | 2011-09-29 | 2013-09-04 | 成都嘉新科技集团有限公司 | Gravity filling mortar |
| CN102491671B (en) * | 2011-11-18 | 2013-02-27 | 大连科诺科技发展有限公司 | Concrete nano water-reducing super high-early-strength agent |
| KR101360261B1 (en) * | 2013-11-19 | 2014-02-11 | 임성호 | Manufacturing method of light weight bubble cement using composition of light weight bubble cement |
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Inventor after: Zhang Xuesong Inventor before: Wang Chong Inventor before: Liu Junchao Inventor before: Zhang Cong Inventor before: Li Zongyang Inventor before: Yin Daodao Inventor before: Bai Guang Inventor before: Yu Chao Inventor before: Zhang Chao Inventor before: Zhou Ying |
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Effective date of registration: 20171228 Address after: 550000 Guiyang, Guiyang City, Guizhou Province, Guiyang national high tech Industrial Development Zone, No. 89 Jinli building commercial office and shop No. B (B) 1 unit 16 layer 1 Patentee after: Guizhou Hua Shuo source Greenway Technology Materials Co. Address before: 400044 Shapingba street, Shapingba District, Chongqing, No. 174 Patentee before: Chongqing University |
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