CN1156701A - Expanding agent for cement concrete - Google Patents
Expanding agent for cement concrete Download PDFInfo
- Publication number
- CN1156701A CN1156701A CN 96116631 CN96116631A CN1156701A CN 1156701 A CN1156701 A CN 1156701A CN 96116631 CN96116631 CN 96116631 CN 96116631 A CN96116631 A CN 96116631A CN 1156701 A CN1156701 A CN 1156701A
- Authority
- CN
- China
- Prior art keywords
- cement
- concrete
- water
- swelling agent
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A bulking agent used individually or in conjunction with water saver, setting retarder, existing bulking agent, and aluminium sulfate to prepare cement slurry, mortar or concrete with bulking performance is made up of magnesium sulfate. Its consumption is 0.3-4.0% of weight of cement. It features directly dissolving in water, uniform mixing, less consumption and increasing concrete strength.
Description
The present invention relates to a kind of use inorganic materials as sand-cement slurry and concrete effective constituent.
The swelling agent that existing cement concrete is used is the alunite expansion agent series, UEA type swelling agent, AEA type swelling agent, CEA type swelling agent etc., these swelling agents are all powdery, water insoluble or micro-water-soluble, bad dispersibility in the cement concrete mixture is difficult to mix, and incorporation is big, be 12～14% of cement weight, and concrete early strength is reduced.
The swelling agent that provides a kind of cement concrete satisfactory for result to use is provided task of the present invention, and this swelling agent adopts sal epsom, and having can be water-soluble, incorporation is little, mix is even, can make cement concrete produce stable expansion, improves advantages such as concrete strength.
The swelling agent that a kind of cement concrete is used is characterized in that this swelling agent adopts sal epsom, and incorporation is 0.3～4.0% of a cement weight, and its optimal mixing amount is 0.5～2.0% of a cement weight.Described swelling agent is pressed the effective constituent metering of sal epsom, can directly adopt anhydrous magnesium sulfate or contain the sal epsom of crystal water, it can use separately, also can with water reducer, retardant, existing swelling agent and the compound use of Tai-Ace S 150, be applicable to the cement of silicate series, as microdilatancy type moderate-heat portland cement and low-heat slag cement, slag cement, trass cement, pulverized fuel ash cement and mixed cement, and mix the composite gelled material of adulterants such as slag and flyash at home and abroad at the cement of this class silicate series, can be widely used in and mix the cement paste that fixture has expansion character, mortar and concrete material.
With prior art relatively, the present invention has the following advantages: (1) sal epsom is soluble in water, places mixing water to use, and can guarantee that it is uniformly dispersed in mortar, concrete; (2) incorporation only is 0.3～4.0% of a cement weight; (3) be under 0.3～2.0% condition of cement weight at incorporation, can improve the intensity of cement concrete; (4) can produce stable expansion and shrink, can improve concrete weather resistance, easy construction with compensating concrete.
Embodiment 1
Get 525 micro-expansion cements, 1000 grams, get mixing water ready by standard consistency, metering anhydrous magnesium sulfate 3.0 grams mix mixing water, make cement paste.Be shaped to 30 * 30 * 275mm test specimen, normal curing, the rate of expansion that recorded 28 days is 580 * 10
-6, 28 days folding strengths are 8.35MPa, ultimate compression strength is 54.3MPa, and 28 days rate of expansion of test specimen of not mixing sal epsom are 420 * 10
-6, 28 days cement paste folding strengths are 8.03MPa, ultimate compression strength is 53.2MPa.
Embodiment 2
Get 525 Portland cements, 700 grams and levigated flyash 300 grams, get mixing water ready by standard consistency, metering anhydrous magnesium sulfate 28 grams, mix is clean slurry, is shaped to 30 * 30 * 275mm test specimen, normal curing, the rate of expansion that recorded 28 days is 1300 * 10
-6
Embodiment 3
Get 425 microdilatancy type low-heat portland cements, 1000 grams, get mixing water ready by standard consistency, metering anhydrous magnesium sulfate 30 grams place fusion water, add soluble inorganic salt Tai-Ace S 150 12 grams again, make cement paste, and recording 28 days rate of expansion is 2200 * 10
-6
Embodiment 4
Press 525 slag cement: sand: water=1: 2: 0.4, the sal epsom weight that adds in the entry is 2% of cement weight, makes mortar, is shaped to 30 * 30 * 275mm test specimen, normal curing, the rate of expansion that recorded 28 days is 350 * 10
-6
Embodiment 5
Mix the system cement concrete, press 525 Portland cements: sand: water: rubble=1: 0.55: 2.0: 30, the sal epsom incorporation is 3% of a cement weight, places mixing water in advance, is shaped to 70.7 * 70.7 * 275mm test specimen, the exapnsion rate that recorded 28 days is 200 * 10
-6
Embodiment 6
Mix the system cement concrete, replace 30% cement, also mix calcium lignin sulphonate of water reducer with levigated flyash equivalent, incorporation is 0.20% of cement and a flyash total amount, other raw materials are identical with enforcement 5, are shaped to 70.7 * 70.7 * 275mm test specimen, and the rate of expansion that recorded 28 days is 120 * 10
-6
Embodiment 7
Mix the system cement concrete, press 525 Portland cements: water: sand: rubble=1: 0.55: 2.0: 30, mixing sal epsom is 3% of water weight, mix Tai-Ace S 150 again, its add-on is 0.6% of a cement weight, also mixing the retardant molasses is 0.15% of cement weight, and all the other conditions are identical with enforcement 5, and the rate of expansion that recorded 28 days is 240 * 10
-6
Claims (2)
1. swelling agent that cement concrete is used is characterized in that: this swelling agent adopts sal epsom, and incorporation is 0.3～4.0% of a cement weight.
2. according to the swelling agent of claim 1, it is characterized in that: the incorporation of sal epsom is 0.5～2.0% of a cement weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116631A CN1044363C (en) | 1996-12-20 | 1996-12-20 | Expanding agent for cement concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116631A CN1044363C (en) | 1996-12-20 | 1996-12-20 | Expanding agent for cement concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156701A true CN1156701A (en) | 1997-08-13 |
| CN1044363C CN1044363C (en) | 1999-07-28 |
Family
ID=5123722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96116631A Expired - Fee Related CN1044363C (en) | 1996-12-20 | 1996-12-20 | Expanding agent for cement concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044363C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054459A (en) * | 2019-05-13 | 2019-07-26 | 江苏六道建材有限公司 | A kind of magnesium sulfide light cellular partition board processing formula |
| CN112624695A (en) * | 2020-12-21 | 2021-04-09 | 青岛光大集团工程有限公司 | High-strength high-performance concrete and preparation method thereof |
| CN113998974A (en) * | 2021-11-23 | 2022-02-01 | 深圳市中天元实业有限公司 | Lightweight high-strength concrete and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107101B (en) * | 1985-09-26 | 1988-03-09 | 国家建筑材料工业局建筑材料科学研究院 | Calcium aluminate based expanding agent and manufacturing process thereof |
-
1996
- 1996-12-20 CN CN96116631A patent/CN1044363C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054459A (en) * | 2019-05-13 | 2019-07-26 | 江苏六道建材有限公司 | A kind of magnesium sulfide light cellular partition board processing formula |
| CN112624695A (en) * | 2020-12-21 | 2021-04-09 | 青岛光大集团工程有限公司 | High-strength high-performance concrete and preparation method thereof |
| CN113998974A (en) * | 2021-11-23 | 2022-02-01 | 深圳市中天元实业有限公司 | Lightweight high-strength concrete and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044363C (en) | 1999-07-28 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |