CN117550864A - Cementing material system for improving cracking resistance of concrete - Google Patents
Cementing material system for improving cracking resistance of concrete Download PDFInfo
- Publication number
- CN117550864A CN117550864A CN202211338744.5A CN202211338744A CN117550864A CN 117550864 A CN117550864 A CN 117550864A CN 202211338744 A CN202211338744 A CN 202211338744A CN 117550864 A CN117550864 A CN 117550864A
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- Prior art keywords
- concrete
- cracking
- prepared
- cement
- material system
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- 239000000463 material Substances 0.000 title claims abstract description 78
- 239000004567 concrete Substances 0.000 title claims abstract description 56
- 238000005336 cracking Methods 0.000 title claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 30
- 239000010881 fly ash Substances 0.000 claims description 18
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 17
- 239000011575 calcium Substances 0.000 claims description 17
- 229910052791 calcium Inorganic materials 0.000 claims description 17
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 17
- 239000000920 calcium hydroxide Substances 0.000 claims description 17
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 17
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 17
- 229910052602 gypsum Inorganic materials 0.000 claims description 17
- 239000010440 gypsum Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 17
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 11
- 239000004115 Sodium Silicate Substances 0.000 claims description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 230000002708 enhancing effect Effects 0.000 claims 6
- 238000006703 hydration reaction Methods 0.000 abstract description 9
- 238000004132 cross linking Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 abstract description 3
- 239000000654 additive Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010053567 Coagulopathies Diseases 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000035602 clotting Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a cementing material system for improving the cracking resistance of concrete, which comprises a cementing material prepared from cement and a cracking resistant material in a certain proportion, wherein the cracking resistant material is prepared from the following components in parts by weight: the invention reduces the hydration reaction rate of the concrete, avoids the cracking after the concrete is condensed caused by the accumulation of hydration reaction heat, and the adhesion effect of inorganic crosslinking and organic crosslinking components, avoids the crack of the concrete by strengthening the adhesion between concrete materials, and has the performance of obviously improving the crack resistance of the concrete.
Description
Technical Field
The invention relates to the technical field of concrete cementing materials, in particular to a cementing material system for improving the cracking resistance of concrete.
Background
Concrete (Concrete), abbreviated as "Concrete (t bang)": refers to the collective term for engineering composite materials in which aggregate is consolidated into a whole by a cementitious material. The term concrete generally refers to cement as a cementing material, sand and stone as aggregate; mixing with water (which can contain additives and admixtures) according to a certain proportion, and stirring to obtain cement concrete, also called ordinary concrete, which is widely applied to civil engineering;
the concrete is one of the most main civil engineering materials in the current generation, and is prepared from cementing materials, granular aggregates (also called aggregate), water, and additives and admixtures added if necessary according to a certain proportion, and is an artificial stone material which is prepared through uniform stirring, compact forming, curing and hardening. The characteristics lead the application range to be very wide, and the concrete is not only used in various civil engineering, namely shipbuilding industry, mechanical industry, ocean development, geothermal engineering and the like, but also is an important material.
The cementing material components of the existing concrete enable the adhesion effect between the concrete materials to be general, the concrete is easy to crack after being coagulated for a period of time, the concrete is damaged, and normal use is affected, so that the design of the cementing material system for improving the cracking resistance of the concrete is a technical problem to be solved in the technical field of the cementing material of the concrete.
Disclosure of Invention
The invention aims to provide a cementing material system for improving the cracking resistance of concrete so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the cementing material system for improving the cracking resistance of the concrete comprises a cementing material prepared from a certain proportion of cement and a certain proportion of cracking resistant material, wherein the cracking resistant material is prepared from the following components in parts by weight: 0.15 to 0.2 of slaked lime powder, 0.02 to 0.04 of sugar calcium, 0.05 to 0.08 of polyvinyl alcohol (low viscosity), 0.1 to 0.2 of desulfurized gypsum, 0.1 to 0.15 of instant sodium silicate, 0.15 to 0.2 of slag micropowder and 0.2 to 0.3 of fly ash.
As a further scheme of the invention: the anticracking material accounts for 0% -60% of the total cementing material in the concrete.
As still further aspects of the invention: the cement is 42.5 ordinary silicon cement.
As still further aspects of the invention: the cement accounts for 40% -100% of the total cementing material in the concrete.
As still further aspects of the invention: and the slaked lime powder, the sugar calcium, the desulfurized gypsum, the slag micropowder and the fly ash are all ground to the required fineness by a ball mill.
As still further aspects of the invention: the crack-resistant material is prepared by fully mixing 0.15-0.2 part of slaked lime powder, 0.02-0.04 part of sugar calcium, 0.05-0.08 part of polyvinyl alcohol (low viscosity), 0.1-0.2 part of desulfurized gypsum, 0.1-0.15 part of instant sodium silicate, 0.15-0.2 part of slag micropowder and 0.2-0.3 part of fly ash in mixing equipment.
As still further aspects of the invention: the cementing material is prepared by fully mixing the prepared anti-cracking material and cement with corresponding proportions in mixing equipment.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the concrete hydration reaction rate is reduced, the cracking of the concrete after coagulation caused by hydration reaction heat accumulation is avoided, the adhesion effect of inorganic crosslinking and organic crosslinking components is improved, the crack of the concrete is avoided by strengthening the adhesion between concrete materials, and the crack resistance of the concrete is obviously improved.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the embodiment of the invention, a cementing material system for improving the cracking resistance of concrete comprises a cementing material prepared from cement in a certain proportion and a cracking resistant material in a certain proportion, wherein the cracking resistant material is prepared from the following components in parts by weight: 0.15-0.2% of slaked lime powder, 0.02-0.04% of sugar calcium, 0.05-0.08% of polyvinyl alcohol (low viscosity), 0.1-0.2% of desulfurized gypsum, 0.1-0.15% of instant sodium silicate, 0.15-0.2% of slag micropowder, 0.2-0.3% of fly ash, wherein the crack resistant material accounts for 0-60% of the total cementing material in the concrete, the cement is 42.5 ordinary silicon cement, the cement accounts for 40-100% of the total cementing material in the concrete, the slaked lime powder, the sugar calcium, the desulfurized gypsum, the slag micropowder and the fly ash are all ground to required fineness by a ball mill, the crack resistant material is prepared by fully mixing the slaked lime powder 0.15-0.2%, the sugar calcium 0.02-0.04% of polyvinyl alcohol (low viscosity), 0.15-0.08% of desulfurized gypsum, 0.1-0.2% of instant sodium silicate, 0.15-0.2% of slag micropowder and 0.2% of fly ash in a mixing device, and the fly ash are prepared into the crack resistant material by mixing the corresponding cement mixing proportion in the mixing device;
example 1
The cementing material system for improving the cracking resistance of the concrete comprises a cementing material prepared from a certain proportion of cement and a certain proportion of cracking resistant material, wherein the cracking resistant material is prepared from the following components in parts by weight: the cement is 42.5 ordinary silicon cement, the slaked lime powder, the sugar calcium, the desulfurized gypsum, the slag micropowder and the fly ash are all ground to the required fineness by a ball mill, the slaked lime powder 0.15, the sugar calcium 0.02, the polyvinyl alcohol (low viscosity) 0.05, the desulfurized gypsum 0.1, the instant sodium silicate 0.1, the slag micropowder 0.15 and the fly ash 0.2 are fully mixed in a mixing device, and the cementing material is prepared by fully mixing the crack-resistant material prepared by mixing and the cement with the corresponding proportion in the mixing device.
Example two
The cementing material system for improving the cracking resistance of the concrete comprises a cementing material prepared from a certain proportion of cement and a certain proportion of cracking resistant material, wherein the cracking resistant material is prepared from the following components in parts by weight: the cracking resistant material is prepared by fully mixing slaked lime powder 0.2, sugar calcium 0.04, polyvinyl alcohol (low viscosity) 0.08, desulfurized gypsum 0.2, instant sodium silicate 0.15, slag micropowder 0.2 and fly ash 0.3 in a mixing device, wherein the cement is 42.5 ordinary silicon cement, the slaked lime powder, the sugar calcium, the desulfurized gypsum, the slag micropowder and the fly ash are all ground to required fineness by a ball mill, and the cracking resistant material is prepared by fully mixing the slaked lime powder 0.2, the sugar calcium 0.04, the polyvinyl alcohol (low viscosity) 0.08, the desulfurized gypsum 0.2, the instant sodium silicate 0.15, the slag micropowder 0.2 and the fly ash 0.3 in the mixing device.
Example III
The cementing material system for improving the cracking resistance of the concrete comprises a cementing material prepared from a certain proportion of cement and a certain proportion of cracking resistant material, wherein the cracking resistant material is prepared from the following components in parts by weight: the cracking resistant material is prepared by fully mixing slaked lime powder 0.18, sugar calcium 0.03, polyvinyl alcohol (low viscosity) 0.07, desulfurized gypsum 0.15, instant sodium silicate 0.12, slag micropowder 0.18 and fly ash 0.25, wherein the cement is 42.5 ordinary silicon cement, the slaked lime powder, the sugar calcium, the desulfurized gypsum, the slag micropowder and the fly ash are all ground to required fineness by a ball mill, and the cracking resistant material is prepared by fully mixing slaked lime powder 0.18, sugar calcium 0.03, polyvinyl alcohol (low viscosity) 0.07, desulfurized gypsum 0.15, instant sodium silicate 0.12, slag micropowder 0.18 and fly ash 0.25 in a mixing device.
According to the invention, the concrete hydration reaction rate is reduced, cracking after coagulation of the concrete caused by hydration reaction heat accumulation is avoided, and the adhesion effect of inorganic crosslinking and organic crosslinking components is improved, so that cracks generated by the concrete are avoided by strengthening the adhesion between concrete materials, and the crack resistance of the concrete is obviously improved;
the clotting time experimental data are presented below:
the experimental data show that along with the increase of the mixing proportion of the anti-cracking material, the setting time is prolonged, and the anti-cracking material has the effect of delaying the hydration reaction of cement, so that the hydration reaction time is prolonged, the accumulation of hydration reaction heat can be reduced, and the concrete crack can be avoided;
the results of the cement concrete crack test are shown in the following table:
the experimental data show that the anti-cracking glue material has the advantages that the mixing amount reaches more than 20%, the test piece does not crack, but the mixing amount is too large, the concrete is lower, and when the mixing amount is 20% -40%, the strength requirement can be met, and the anti-cracking effect is achieved.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. The cementing material system for improving the cracking resistance of the concrete comprises a cementing material prepared from a certain proportion of cement and a certain proportion of cracking resistant material, and is characterized in that: the anti-cracking material is prepared from the following components in parts by weight: 0.15 to 0.2 of slaked lime powder, 0.02 to 0.04 of sugar calcium, 0.05 to 0.08 of polyvinyl alcohol (low viscosity), 0.1 to 0.2 of desulfurized gypsum, 0.1 to 0.15 of instant sodium silicate, 0.15 to 0.2 of slag micropowder and 0.2 to 0.3 of fly ash.
2. The cementitious material system for enhancing crack resistance of concrete of claim 1, wherein: the anticracking material accounts for 0% -60% of the total cementing material in the concrete.
3. The cementitious material system for enhancing crack resistance of concrete of claim 1, wherein: the cement is 42.5 ordinary silicon cement.
4. The cementitious material system for enhancing crack resistance of concrete of claim 1, wherein: the cement accounts for 40% -100% of the total cementing material in the concrete.
5. The cementitious material system for enhancing crack resistance of concrete of claim 1, wherein: and the slaked lime powder, the sugar calcium, the desulfurized gypsum, the slag micropowder and the fly ash are all ground to the required fineness by a ball mill.
6. The cementitious material system for enhancing crack resistance of concrete of claim 1, wherein: the crack-resistant material is prepared by fully mixing 0.15-0.2 part of slaked lime powder, 0.02-0.04 part of sugar calcium, 0.05-0.08 part of polyvinyl alcohol (low viscosity), 0.1-0.2 part of desulfurized gypsum, 0.1-0.15 part of instant sodium silicate, 0.15-0.2 part of slag micropowder and 0.2-0.3 part of fly ash in mixing equipment.
7. The cementitious material system for enhancing crack resistance of concrete of claim 1, wherein: the cementing material is prepared by fully mixing the prepared anti-cracking material and cement with corresponding proportions in mixing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211338744.5A CN117550864A (en) | 2022-10-28 | 2022-10-28 | Cementing material system for improving cracking resistance of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211338744.5A CN117550864A (en) | 2022-10-28 | 2022-10-28 | Cementing material system for improving cracking resistance of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117550864A true CN117550864A (en) | 2024-02-13 |
Family
ID=89809815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211338744.5A Pending CN117550864A (en) | 2022-10-28 | 2022-10-28 | Cementing material system for improving cracking resistance of concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117550864A (en) |
-
2022
- 2022-10-28 CN CN202211338744.5A patent/CN117550864A/en active Pending
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