CN1107126A - Additives for permeation-resistant silicate cement and preparing method - Google Patents
Additives for permeation-resistant silicate cement and preparing method Download PDFInfo
- Publication number
- CN1107126A CN1107126A CN 94116403 CN94116403A CN1107126A CN 1107126 A CN1107126 A CN 1107126A CN 94116403 CN94116403 CN 94116403 CN 94116403 A CN94116403 A CN 94116403A CN 1107126 A CN1107126 A CN 1107126A
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- China
- Prior art keywords
- additives
- reaction
- permeation
- cement
- silicate cement
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- 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
- C04B22/143—Calcium-sulfate
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00301—Non-porous materials, e.g. macro-defect free [MDF] products
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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
The invented additives is made up from the reaction of talc powder and sulfuric acid through stirring. The permeation resistant silicate cement can be produced by adding 6-10% of said additives in the silicate cement. Said additives features simple raw material, unique receipe, short in productive technological process, small investment, energy saving, low cost, and good effect of the permeation resistance of the product.
Description
The present invention relates to additives for permeation-resistant silicate cement and preparation method thereof, belong to material of construction.
The concrete structure of being made by silicate cement exists serious seepage phenomenon always, and therefore numerous contrivers are devoted to solve leakage problems for many years.The most organic materialss that adopt of present waterproof measure both domestic and external, its shortcoming is to be difficult for construction, condition harshness during construction, the life-span is short, the cost height, organic materials can not be used in some engineering such as dykes and dams, pond etc.Another kind of solution is to use concrete admixture (or claiming water-resisting agent, impervious agent), but admixture can not be evenly distributed in the concrete, thereby causes impervious quality inequality, especially heavy construction to be difficult to guarantee the quality of integrated engineering.CN 1077699A disclosed " cement impervious agent and preparation method thereof " application for a patent for invention, its impervious agent can the system cement grinding machine in the grog mix grinding, overcome admixture and in construction, puddled uneven problem, but still had that the technological process of production is long, shortcomings such as equipment is many, investment is big, power consumption is high, cost height with cement etc.
The objective of the invention is provides a kind of additives for permeation-resistant silicate cement and preparation method thereof at above-mentioned deficiency.
The characteristics of this additives for permeation-resistant silicate cement and preparation method thereof are: raw material is simple, prescription is unique, multiple effects such as that its effective constituent and resultant of reaction have is early strong, impervious, expansion, the technological process of production is short, less investment, energy-conservation, cost is low, help dominating the market, will produce high economic benefit and social benefit.
Above-mentioned purpose of the present invention is realized by following technical proposals:
Additives for permeation-resistant silicate cement of the present invention is made through mixing the stirring afterreaction by zeolite powder and sulfuric acid, and wherein the proportioning of each component is:
Zeolite powder 100 weight parts
Sulfuric acid (concentration 50-60%) 31-54 weight part
To puddle 2-6 minute (keeping 50-100 ℃ of temperature of reaction) after above-mentioned two kinds of materials cooperation, in the reactor of stationary state, react 6-12 hour then, make Powdered additive.
Raw material of the present invention has only two kinds, and its specification of quality is as follows:
1, zeolite powder: moisture content＜8%; Fineness (180 mesh sieve) screen over-size＜10%; Inhale ammonium value＞150mg equivalent/100g;
2, industrial sulphuric acid: concentration＞75%.
The compound that generates behind chemical ingredients of the present invention and the chemical reaction:
1, zeolite main chemical compositions:
| Compound | SiO2 | K 2O+Na 20 | Mg0 | CaO | Al 2O 3 | Fe 2O 3 |
| Content % | 58-65 | 0.5-2 | 0.6-1.5 | 1-4 | 9-13 | 1-2 |
2, chemical reaction and resultant
Role when 3, the compound of above-mentioned chemical reaction generation is used in permeation-resistant silicate cement:
(1) K
2SO
4, Na
2SO
4Concrete hardening accelerator.
(2) CaSO
4And when hydrated cementitious and the CaSO that generates of acid-salt reaction
4Be concrete swelling agent.
(3) Al
2(SO
4)
3, Fe
2(SO
4)
3, FeSO
4Concrete impervious agent.
The impervious principle of this additive: silicate cement and water generation chemical reaction, wherein mineral and water are combined into aquation mineral crystal (being the inorganic gel body) formation cement stone, owing to the internal organizational structure of multiple reason cement stone (being concrete) own forms many micropores, this is the major cause of general concrete member percolating water.The Ca(OH that the impervious effect of additive of the present invention in cement produced when just being effective chemical composition of this additive and the tricalcium silicate aquation in the cement)
2The micropore that a kind of new water-fast compound crystal of generation chemical reaction generation has been blocked cement stone has constituted " atresia cement stone " thereby has reached impervious purpose, and its chemical reaction is summarized as follows:
(1) hydration reaction of tricalcium silicate
(2) Ca(OH)
2Chemical reaction with effective chemical composition in the additive
(3) chemical reaction of expansion component
CaSO in this additive
4With acid-salt in the additive (above-mentioned A, B two formulas) and Ca(OH)
2The CaSO that reaction generates
4Following reaction takes place with drated calcium aluminate in the cement minerals:
(this ettringite produces to expand and can reduce contract with dry rate)
Embodiment:
The inventor adopts operational path and equipment enforcement additive of the present invention as shown in drawings.
1, proportioning raw materials
(1) clinoptilolite powder (moisture content 7.5%) 100 weight parts
(2) dilute sulphuric acid (concentration 51%) 38 weight parts
2, technology condition
(1) two kind of material was puddled 4 minutes;
(2) the back arrest reaction 6 hours 30 minutes in the late phase reaction device that is mixed;
(3) temperature of reaction 65-78 ℃;
(4) additive of making send the impervious, cement grinding machine after homogenizing is handled.
The consumption of this additive in permeation-resistant silicate cement is 6-10%.The present embodiment consumption is 8% to produce the 525# permeation-resistant silicate cement, can reach following impervious pressure index after tested
1, standard mortar test block: 3d 1MPa
7d??1.2MPa
28d??1.8MPa
2, standard concrete test block: 7d 2MPa
28d??3MPa
And the general impervious pressure of 525# mortar specimen that silicate cement is done rises to 0.2MPa and just leaks comprehensively, and the impervious ordinary Portland cement and the cement of the same type that utilize additive of the present invention to prepare are done simultaneous test, and its data are listed in table 1, table 2 respectively.
Cement formula table 1
Annotate: 1. grog one hurdle is an intensity of measuring grog.
2. cement designs label 525#.
Cement test intensity and anti-permeability performance table 2
Annotate: the impervious pressure of 1.3# closes in standard.
Comprehensive percolating water when 2.2# impervious pressure reaches 0.2MPa.
From the data of table 1, table 2 as can be seen, its 28d folding strength of impervious ordinary Portland cement is the ordinary Portland cement high 1.3MPa of 9.6MPa than same grog consumption, improves 15.7%; Ultimate compression strength rising 4.1MPa, improve 7.2%, also improve 12.9% than grog folding strength, ultimate compression strength improves 2.8%, simultaneously, the impervious pressure of ordinary Portland cement is got to 0.2MPa comprehensive percolating water is just taken place, and the permeation-resistant silicate cement 3d that produces with additive preparation of the present invention is that 0.8MPa and 7d are the equal ne-leakage phenomenon of 1.2MPa.From table 2 in contract with dry rate one hurdle as can be seen 3# after adding additive of the present invention less than 2# explanation certain expansion is arranged.The impervious ordinary Portland cement that proof is produced with additive preparation of the present invention has enhancing and good impervious effect simultaneously.And technical recipe uniqueness of the present invention, starting material are few, and flow process is short, need not drying process, save the great deal of investment and the energy, apply easily.
Claims (2)
1, additives for permeation-resistant silicate cement, this additive is made through reaction by zeolite powder, sulfuric acid, it is characterized in that the proportioning of each component is:
Zeolite powder: 100 weight parts
Sulfuric acid (concentration 50-60%) 31-54 weight part
To puddle 2-6 minute (keeping 50-100 ℃ of temperature of reaction) after above-mentioned two kinds of materials cooperation, reaction is 6-12 hour in the reactor of stationary state, makes Powdered additive.
2, the preparation method of additives for permeation-resistant silicate cement is made through reaction by zeolite powder, sulfuric acid, it is characterized in that the proportioning of each component is:
Zeolite powder: 100 weight parts
Sulfuric acid (concentration 50-60%) 31-54 weight part
To puddle 2-6 minute (keeping 50-100 ℃ of temperature of reaction) after above-mentioned two kinds of materials cooperation, reaction is 6-12 hour in the reactor of stationary state, makes Powdered additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94116403 CN1107126A (en) | 1994-10-20 | 1994-10-20 | Additives for permeation-resistant silicate cement and preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94116403 CN1107126A (en) | 1994-10-20 | 1994-10-20 | Additives for permeation-resistant silicate cement and preparing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1107126A true CN1107126A (en) | 1995-08-23 |
Family
ID=5037917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94116403 Pending CN1107126A (en) | 1994-10-20 | 1994-10-20 | Additives for permeation-resistant silicate cement and preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1107126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090596C (en) * | 1999-08-20 | 2002-09-11 | 胡一平 | Trace-silicon high-effect cement mortar water-proofing agent |
-
1994
- 1994-10-20 CN CN 94116403 patent/CN1107126A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090596C (en) * | 1999-08-20 | 2002-09-11 | 胡一平 | Trace-silicon high-effect cement mortar water-proofing agent |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |