CN111892361B - Quick-setting cement-based permeable crystallization type waterproof material and preparation method thereof - Google Patents
Quick-setting cement-based permeable crystallization type waterproof material and preparation method thereof Download PDFInfo
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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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
- 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
- C04B2111/00293—Materials impermeable to liquids
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a quick-setting cement-based permeable crystallization type waterproof material and a preparation method thereof, wherein the quick-setting cement-based permeable crystallization type waterproof material comprises the following raw materials, by mass, 20-30 parts of sulphoaluminate cement with the particle size of 20-35 mu m, 10-15 parts of sulphoaluminate cement with the particle size of 3-10 mu m, 25-40 parts of quartz sand with the particle size of 40-80 mu m, 15-20 parts of quartz sand with the particle size of 10-30 mu m, 8-12 parts of active master batch, 3-7 parts of crystal nucleus type early strength agent, 0.5-2.5 parts of polycarboxylic acid water reducer, 0.4-0.7 part of hydroxyethyl methyl cellulose and 1-2 parts of redispersible latex powder; the active master batch comprises, by mass, 10-15% of potassium fluoride, 10-15% of amino trimethylene phosphonic acid tetrasodium, 20-25% of sodium phosphate, 10-15% of sodium oxalate, 10-15% of magnesium sulfate and the balance of sodium silicate. The rapid-setting cement-based capillary crystalline waterproof coating can be quickly hydrated when being constructed at the temperature of 0-10 ℃, can finish final setting within 20 hours, improves the early strength, and has the effects of repeated anti-permeability crystallization and repeated restoration.
Description
Technical Field
The invention belongs to the technical field of permeable crystallization type waterproof materials, and particularly relates to a rapid-setting cement-based permeable crystallization type waterproof material and a preparation method thereof.
Background
The active chemical substance dissolved out from the cement-based permeable crystalline waterproof coating diffuses in the concrete along with the surface water and Ca in the concrete2+、Al3+Chemical reaction is carried out to generate a branch and vine shaped crystal which is insoluble in water, the crystal is full of capillary pores and is combined with concrete into a whole to form a closed and compact waterproof structure; meanwhile, even if the waterproof concrete structure is locally damaged and leaks, the waterproof concrete structure can generate crystallization effect to automatically repair and heal after meeting water. However, when the cement-based permeable crystalline waterproof coating is constructed at the temperature of 0-10 ℃, the hydration speed is extremely low, so that the water in the concrete mortar is too long in storage time, active substances are fully contacted with water, the active substances completely react in the cement hydration process, the secondary impermeable crystallization effect is lost, the concrete structure is damaged or cracks appear in the later period, the self-repairing healing cannot be realized, and the waterproof effect is obvious.
Based on the above, the invention provides a quick-setting cement-based permeable crystallization type waterproof material suitable for construction in a low-temperature environment of 0-10 ℃ and a preparation method thereof.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a quick-setting cement-based permeable crystallization type waterproof material and a preparation method thereof.
The technical scheme of the invention is summarized as follows:
the quick-setting cement-based permeable crystallization type waterproof material comprises the following raw materials in parts by mass:
the active master batch comprises, by mass, 10-15% of potassium fluoride, 10-15% of amino trimethylene phosphonic acid tetrasodium, 20-25% of sodium phosphate, 10-15% of sodium oxalate, 10-15% of magnesium sulfate and the balance of sodium silicate.
Preferably, the crystal nucleus type early strength agent is formed by mixing calcium formate, calcium nitrite, sodium metasilicate pentahydrate, calcium dodecylbenzene sulfonate and micron-sized expanded slag powder according to the mass ratio of 1 (0.5-0.8) to (0.6-1.4) to (0.3-0.6) to (1.2-2.4).
Preferably, the particle size of the micron-sized expanded slag powder is 1-3 μm.
The preparation method of the rapid-setting cement-based permeable crystallization type waterproof material comprises the following steps:
s1, mixing potassium fluoride, amino trimethylene phosphonic acid tetrasodium, sodium phosphate, sodium oxalate, sodium silicate and magnesium sulfate according to mass percentage, and fully grinding to obtain an active master batch;
s2, mixing and fully grinding calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecylbenzene sulfonate, and uniformly mixing with micron-sized expanded slag powder to obtain a crystal nucleus type early strength agent;
and S3, uniformly stirring 20-35 mu m sulphoaluminate cement, 3-10 mu m sulphoaluminate cement, 40-80 mu m quartz sand, 10-30 mu m quartz sand, active master batch, a crystal nucleus type early strength agent, a polycarboxylic acid water reducing agent, hydroxyethyl methyl cellulose and redispersible latex powder according to parts by mass to obtain the cement-based permeable crystallization type waterproof material.
The invention has the beneficial effects that:
1. when the quick-setting cement-based permeable crystallization type waterproof coating is constructed at the temperature of 0-10 ℃, the quick-setting cement-based permeable crystallization type waterproof coating can be quickly hydrated, the final setting can be completed within 20 hours, the early strength is high, and the phenomenon that the secondary impermeable crystallization effect is lost due to the fact that the active master batch is completely reacted because liquid-phase water is fully contacted with the active master batch for a long time is avoided; meanwhile, due to the existence of calcium nitrite and calcium dodecyl benzene sulfonate, the composite material has the functions of an antifreezing agent and an early strength agent, and can reduce the freezing point of the cement-based permeable crystalline waterproof material, so that the composite material still exists dynamically in liquid phase flow in the cement-based permeable crystalline mortar in a negative temperature environment of-5-0 ℃, can be normally hydrated, and avoids the phenomenon that the coating is likely to be frost crack due to thermal expansion and cold contraction to influence the early strength and durability of the cement-based coating.
2. The rapid-setting cement-based capillary crystalline waterproof coating ensures extremely high hydration activity by utilizing the grading of 20-35 mu m sulphoaluminate cement, 3-10 mu m sulphoaluminate cement, 40-80 mu m quartz sand and 10-30 mu m quartz sand, and the grading of 3-10 mu m sulphoaluminate cement and 20-35 mu m sulphoaluminate cement, achieves a rapid-setting effect, and simultaneously, the sulphoaluminate cement and the quartz sand with different grain sizes ensure that the waterproof coating has higher mechanical strength, ensures the compactness of the waterproof coating and fills the pores of cement mortar.
3. The quick-setting cement-based permeable crystallization type waterproof coating disclosed by the invention is prepared by combining active master batch with potassium fluoride, amino trimethylene phosphonic acid tetrasodium, sodium phosphate, sodium oxalate, sodium silicate and magnesium sulfate, taking water as a carrier, and a sulphoaluminate cement hydration product Ca (OH)2And free Ca2+、Al3+、Fe3+And insoluble dendritic crystals such as calcium fluoride/aluminum/iron, amino trimethylene calcium phosphate/aluminum/iron complex, calcium phosphate/aluminum/iron, calcium oxalate/aluminum/iron, calcium silicate/aluminum/iron, ettringite, magnesium hydroxide and the like are generated under the action, capillary channels and cracks of the waterproof coating are repaired and filled, and the crystal waterproof coating is endowed with repeated self-healing and repairing functions.
4. The invention takes ultrafine micron-sized expanded slag powder as a crystal nucleus, and the surface of the crystal nucleus is provided with a large number of irregular honeycomb-like edges and corners for hydrationThe product improves sufficient growth sites, so that the product is quickly hardened and grown, and hydration products are uniformly distributed, so that the early strength is improved; meanwhile, the slag powder can be mixed with hydration products Ca (OH)2Secondary hydration promotes more C-S-H products to be generated; the crystal nucleus type early strength agent is prepared by calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecyl benzene sulfonate, and is used for synergistically improving the early strength of concrete and enhancing the damage capability of the concrete to resist freezing.
Drawings
FIG. 1 is a flow chart of the preparation method of the rapid-setting cement-based permeable crystallization type waterproof material of the present invention.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
Example 1
The preparation method of the rapid-setting cement-based permeable crystallization type waterproof material comprises the following steps:
s1, weighing 10% of potassium fluoride, 10% of tetrasodium amino trimethylene phosphonate, 20% of sodium phosphate, 10% of sodium oxalate, 10% of magnesium sulfate and the balance of sodium silicate by mass, uniformly mixing and fully grinding to obtain an active master batch;
s2, mixing and fully grinding calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecylbenzene sulfonate, and uniformly mixing with micron-sized expanded slag powder with the particle size of 1-3 mu m to obtain a crystal nucleus type early strength agent; the crystal nucleus type early strength agent is prepared by mixing calcium formate, calcium nitrite, sodium metasilicate pentahydrate, calcium dodecyl benzene sulfonate and micron-sized expanded slag powder in a mass ratio of 1:0.5:0.6:0.3: 1.2;
s3, uniformly stirring 20 parts by mass of sulphoaluminate cement with the particle size of 20-35 microns, 10 parts by mass of sulphoaluminate cement with the particle size of 3-10 microns, 25 parts by mass of quartz sand with the particle size of 40-80 microns, 15 parts by mass of quartz sand with the particle size of 10-30 microns, 8 parts by mass of active master batch, 3 parts by mass of crystal nucleus type early strength agent, 0.5 part by mass of polycarboxylic acid water reducing agent, 0.4 part by mass of hydroxyethyl methyl cellulose and 1 part by mass of redispersible latex powder to obtain the cement-based permeable crystalline waterproof material.
Example 2
The preparation method of the rapid-setting cement-based permeable crystallization type waterproof material comprises the following steps:
s1, weighing 12% of potassium fluoride, 12% of tetrasodium amino trimethylene phosphonate, 21% of sodium phosphate, 12% of sodium oxalate, 12% of magnesium sulfate and the balance of sodium silicate by mass, uniformly mixing and fully grinding to obtain an active master batch;
s2, mixing and fully grinding calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecylbenzene sulfonate, and uniformly mixing with micron-sized expanded slag powder with the particle size of 1-3 mu m to obtain a crystal nucleus type early strength agent; the crystal nucleus type early strength agent is prepared by mixing calcium formate, calcium nitrite, sodium metasilicate pentahydrate, calcium dodecyl benzene sulfonate and micron-sized expanded slag powder in a mass ratio of 1:0.6:0.9:0.4: 1.6;
s3, stirring 23 parts by mass of sulphoaluminate cement with the particle size of 20-35 microns, 12 parts by mass of sulphoaluminate cement with the particle size of 3-10 microns, 30 parts by mass of quartz sand with the particle size of 40-80 microns, 16 parts by mass of quartz sand with the particle size of 10-30 microns, 10 parts by mass of active master batch, 5 parts by mass of crystal nucleus type early strength agent, 1 part by mass of polycarboxylic acid water reducing agent, 0.5 part by mass of hydroxyethyl methyl cellulose and 1.3 parts by mass of redispersible latex powder uniformly to obtain the cement-based permeable crystalline waterproof material.
Example 3
The preparation method of the rapid-setting cement-based permeable crystallization type waterproof material comprises the following steps:
s1, weighing 14% of potassium fluoride, 14% of tetrasodium amino trimethylene phosphonate, 23% of sodium phosphate, 14% of sodium oxalate, 14% of magnesium sulfate and the balance of sodium silicate by mass, uniformly mixing and fully grinding to obtain an active master batch;
s2, mixing and fully grinding calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecylbenzene sulfonate, and uniformly mixing with micron-sized expanded slag powder with the particle size of 1-3 mu m to obtain a crystal nucleus type early strength agent; the crystal nucleus type early strength agent is prepared by mixing calcium formate, calcium nitrite, sodium metasilicate pentahydrate, calcium dodecyl benzene sulfonate and micron-sized expanded slag powder in a mass ratio of 1:0.7:1.2:0.5: 2;
s3, uniformly stirring 26 parts by mass of sulphoaluminate cement with the particle size of 20-35 microns, 14 parts by mass of sulphoaluminate cement with the particle size of 3-10 microns, 35 parts by mass of quartz sand with the particle size of 40-80 microns, 18 parts by mass of quartz sand with the particle size of 10-30 microns, 11 parts of active master batch, 6 parts of crystal nucleus type early strength agent, 1.8 parts of polycarboxylic acid water reducing agent, 0.6 part of hydroxyethyl methyl cellulose and 1.6 parts of redispersible latex powder to obtain the cement-based permeable crystalline waterproof material.
Example 4
The preparation method of the rapid-setting cement-based permeable crystallization type waterproof material comprises the following steps:
s1, weighing 15% of potassium fluoride, 15% of tetrasodium amino trimethylene phosphonate, 25% of sodium phosphate, 15% of sodium oxalate, 15% of magnesium sulfate and the balance of sodium silicate by mass, uniformly mixing and fully grinding to obtain an active master batch;
s2, mixing and fully grinding calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecylbenzene sulfonate, and uniformly mixing with micron-sized expanded slag powder with the particle size of 1-3 mu m to obtain a crystal nucleus type early strength agent; the crystal nucleus type early strength agent is prepared by mixing calcium formate, calcium nitrite, sodium metasilicate pentahydrate, calcium dodecyl benzene sulfonate and micron-sized expanded slag powder in a mass ratio of 1:0.8:1.4:0.6: 2.4;
s3, uniformly stirring 30 parts by mass of sulphoaluminate cement with the particle size of 20-35 microns, 15 parts by mass of sulphoaluminate cement with the particle size of 3-10 microns, 40 parts by mass of quartz sand with the particle size of 40-80 microns, 20 parts by mass of quartz sand with the particle size of 10-30 microns, 12 parts by mass of active master batch, 7 parts by mass of crystal nucleus type early strength agent, 2.5 parts by mass of polycarboxylic acid water reducing agent, 0.7 part by mass of hydroxyethyl methyl cellulose and 2 parts by mass of redispersible latex powder to obtain the cement-based permeable crystalline waterproof material.
Comparative example 1: the same as example 1, except that calcium nitrite and calcium dodecylbenzenesulfonate were not added during the preparation.
Comparative example 2: the same as in example 1, except that no micron-sized expanded slag powder was added during the preparation.
Comparative example 3: the same as in example 1, except that no nucleation type early strength agent was added during the preparation.
The cement-based permeable crystalline waterproof materials prepared in examples 1-4 and comparative examples 1-3 were constructed at 5 ℃, and maintained at 5 ℃, and the physical and mechanical properties were measured according to GB 18445-:
as can be seen from the above table, the rapid-setting cement-based permeable crystallization type waterproof coating can be rapidly hydrated at the temperature of 5 ℃ during construction, the final setting can be completed within 20h, the early strength is high, and the phenomenon that the active master batch completely reacts to lose the secondary impermeable crystallization effect due to the long-time sufficient contact between liquid-phase water and the active master batch is avoided.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (3)
1. The rapid-setting cement-based permeable crystallization type waterproof material is characterized by comprising the following raw materials in parts by mass:
the active master batch comprises, by mass, 10-15% of potassium fluoride, 10-15% of amino trimethylene phosphonic acid tetrasodium, 20-25% of sodium phosphate, 10-15% of sodium oxalate, 10-15% of magnesium sulfate and the balance of sodium silicate;
the crystal nucleus type early strength agent is formed by mixing calcium formate, calcium nitrite, sodium metasilicate pentahydrate, calcium dodecyl benzene sulfonate and micron-sized expanded slag powder according to the mass ratio of 1 (0.5-0.8) to (0.6-1.4) to (0.3-0.6) to (1.2-2.4).
2. The rapid-setting cement-based permeable crystalline waterproof material as claimed in claim 1, wherein the micron-sized expanded slag powder has a particle size of 1 to 3 μm.
3. The method for preparing the rapid-setting cement-based permeable crystalline waterproof material as claimed in any one of claims 1 to 2, comprising the steps of:
s1, mixing potassium fluoride, amino trimethylene phosphonic acid tetrasodium, sodium phosphate, sodium oxalate, sodium silicate and magnesium sulfate according to mass percentage, and fully grinding to obtain an active master batch;
s2, mixing and fully grinding calcium formate, calcium nitrite, sodium metasilicate pentahydrate and calcium dodecylbenzene sulfonate, and uniformly mixing with micron-sized expanded slag powder to obtain a crystal nucleus type early strength agent;
and S3, uniformly stirring 20-35 mu m sulphoaluminate cement, 3-10 mu m sulphoaluminate cement, 40-80 mu m quartz sand, 10-30 mu m quartz sand, active master batch, a crystal nucleus type early strength agent, a polycarboxylic acid water reducing agent, hydroxyethyl methyl cellulose and redispersible latex powder according to parts by mass to obtain the cement-based permeable crystallization type waterproof material.
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Denomination of invention: Quick setting cement-based permeable crystalline waterproof material and its preparation method Effective date of registration: 20220708 Granted publication date: 20220318 Pledgee: China Everbright Bank Limited by Share Ltd. Hefei branch Pledgor: ANHUI LENCAQI BUILDING MATERIAL Co.,Ltd. Registration number: Y2022980010096 |