CN112374800A - Material for reducing cement and improving concrete strength - Google Patents
Material for reducing cement and improving concrete strength Download PDFInfo
- Publication number
- CN112374800A CN112374800A CN202011273206.3A CN202011273206A CN112374800A CN 112374800 A CN112374800 A CN 112374800A CN 202011273206 A CN202011273206 A CN 202011273206A CN 112374800 A CN112374800 A CN 112374800A
- Authority
- CN
- China
- Prior art keywords
- parts
- cement
- concrete
- strength
- bentonite
- 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.)
- Pending
Links
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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a material for reducing cement and improving concrete strength, which is characterized by comprising the following raw materials in parts by weight: 5-10 parts of calcium lignosulphonate, 3.5-6 parts of phenol, 20 parts of sodium methallyl sulfonate, 20-30 parts of micro silicon powder, 8-15 parts of hydroxypropyl methyl cellulose, 7 parts of bentonite, 10 parts of cyclohexane, 10 parts of defoaming agent and 4 parts of water reducing agent; the invention relates to the technical field of concrete, and the micro silicon powder and the bentonite in the invention realize the effect that the concrete needs less cement under the same strength.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a material for reducing cement and improving concrete strength.
Background
The concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely fresh concrete or concrete mixture; hardened, i.e. hardened concrete or concrete.
One of the main indicators of concrete quality is that the compressive strength of concrete is in direct proportion to the strength of cement used in concrete, and when the water cement ratio is equal, the compressive strength of concrete prepared by high-grade cement is much higher than that of concrete prepared by low-grade cement. Generally speaking, the water-cement ratio is inversely proportional to the concrete strength, when the water-cement ratio is not changed, the concrete strength is improved by increasing the cement consumption, at the moment, the workability of the concrete can only be improved, the shrinkage and deformation of the concrete are increased, in addition, the cement can cause a lot of environmental pollution problems in the preparation process, the cement industry is a coal consumer, a large amount of harmful gases such as carbon dioxide, sulfur dioxide, nitrogen oxides and the like are generated after the coal is combusted, the greenhouse effect, acid rain, ozone layer damage and serious damage to the natural environment are caused. The national industrial policy mainly shows that the vertical kiln cement is further limited and eliminated by using legal means, and the development of novel dry-process cement is encouraged; large-scale operation is carried out, and large tap enterprises are constructed; implementing a sustainable development strategy and developing circular economy; however, the use of less cement can reduce the strength of the concrete, deteriorate the impermeability, frost resistance, corrosion resistance and carbonization resistance, and make the quality of the concrete not meet the design requirements.
To this end, we propose a material for increasing the strength of concrete by reducing cement to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a material for reducing cement and improving concrete strength.
In order to achieve the purpose, the invention adopts the following technical scheme:
a material for reducing cement and improving concrete strength and a preparation method thereof are disclosed, which comprises the following raw materials in parts by weight: 5-10 parts of calcium lignosulphonate, 3.5-6 parts of phenol, 20 parts of sodium methallyl sulfonate, 20-30 parts of micro silicon powder, 8-15 parts of hydroxypropyl methyl cellulose, 7 parts of bentonite, 10 parts of cyclohexane, 10 parts of defoaming agent and 4 parts of water reducing agent.
Preferably, the defoaming agent is one or a mixture of more than two of tributyl phosphate, polyoxypropylene glycerol ether and silicone emulsion.
Preferably, the bentonite is sodium bentonite.
Preferably, the silica fume is composed of active glassy silica with the content of more than 85% and a small amount of calcium oxide, magnesium oxide, iron oxide and aluminum oxide.
Preferably, the water reducing agent is JTB-101.
Compared with the prior art, the invention has the beneficial effects that:
1. in the hydration process of silicate cement, the cement reacts with water to generate hydration products such as hydrated calcium silicate (C-S-H) gel, calcium hydroxide, ettringite and the like. Wherein the crystallinity and orientation of the calcium hydroxide are not good for the strength of the concrete, but after the calcium hydroxide is mixed with silica fume,the reaction of a large amount of active glassy silica contained in the silica fume with water first produces a silica-rich gel, and then the following reaction of calcium hydroxide with the silica-rich gel occurs: ca (OH)2+SiO2+H2The O → C-S-H gels are filled in C-S-H gel gaps of cement, so that the structural compactness is greatly improved, and the effect of reducing the cement content of the concrete under the same strength is achieved;
2. the pozzolanic effect of the silica fume reduces the content of the concrete, so that Ca (OH) of the sulfate in the concrete is difficult to realize2The reaction is carried out to generate ettringite and monosulfuric sulphoaluminate, so that the concrete is cracked and peeled off on the surface, and the alkali-aggregate reaction can be effectively prevented;
3. the bentonite can improve the working properties of the cement paste such as viscosity, water absorption and the like, so that the cement paste has low elastic modulus and high anti-permeability performance, the bentonite can replace part of cement in concrete to form low-strength and low-elastic modulus concrete, the safety and the anti-seepage effect are both greatly improved, the engineering cost is also reduced, and the effect is good.
Detailed Description
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Example 1
A material for reducing cement and improving concrete strength comprises the following raw materials in parts by weight: 5-10 parts of calcium lignosulphonate, 3.5-6 parts of phenol, 20 parts of sodium methallyl sulfonate, 20 parts of micro silicon powder, 8-15 parts of hydroxypropyl methyl cellulose, 7 parts of bentonite, 10 parts of cyclohexane, 10 parts of a defoaming agent and 4 parts of a water reducing agent.
In the embodiment, the defoaming agent is one or a mixture of more than two of tributyl phosphate, polyoxypropylene glycerol ether and emulsified silicone oil.
In this embodiment, the bentonite is sodium bentonite.
In this embodiment, the silica fume is composed of active glassy silica with a content of more than 85% and a small amount of calcium oxide, magnesium oxide, iron oxide, and aluminum oxide.
In the implementation, the model of the water reducing agent is JTB-101.
Example 2
A material for reducing cement and improving concrete strength comprises the following raw materials in parts by weight: 5-10 parts of calcium lignosulphonate, 3.5-6 parts of phenol, 20 parts of sodium methallyl sulfonate, 0 part of micro silicon powder, 8-15 parts of hydroxypropyl methyl cellulose, 7 parts of bentonite, 10 parts of cyclohexane, 10 parts of defoaming agent and 4 parts of water reducing agent.
In the embodiment, the defoaming agent is one or a mixture of more than two of tributyl phosphate, polyoxypropylene glycerol ether and emulsified silicone oil.
In this embodiment, the bentonite is sodium bentonite.
In this embodiment, the silica fume is composed of active glassy silica with a content of more than 85% and a small amount of calcium oxide, magnesium oxide, iron oxide, and aluminum oxide.
In the implementation, the model of the water reducing agent is JTB-101.
Example 3
A material for reducing cement and improving concrete strength comprises the following raw materials in parts by weight: 5-10 parts of calcium lignosulphonate, 3.5-6 parts of phenol, 20 parts of sodium methallyl sulfonate, 16 parts of micro silicon powder, 8-15 parts of hydroxypropyl methyl cellulose, 7 parts of bentonite, 10 parts of cyclohexane, 10 parts of a defoaming agent and 4 parts of a water reducing agent.
In the embodiment, the defoaming agent is one or a mixture of more than two of tributyl phosphate, polyoxypropylene glycerol ether and emulsified silicone oil.
In this embodiment, the bentonite is sodium bentonite.
In this embodiment, the silica fume is composed of active glassy silica with a content of more than 85% and a small amount of calcium oxide, magnesium oxide, iron oxide, and aluminum oxide.
In the implementation, the model of the water reducing agent is JTB-101.
Experimental data: the variable of the material for reducing the cement and improving the concrete strength is the mixing amount of the micro silicon powder or the content of the cement:
| raw material dosage (kg) | 1 | 2 | 3 |
| Cement | 460 | 480 | 480 |
| Water (W) | 140 | 140 | 140 |
| Sand | 650 | 650 | 650 |
| Stone | 1300 | 1300 | 1300 |
| Silica fume | 50 | 0 | 40 |
| Amount of Water reducing agent% RC | 1.0 | 1.0 | 1.0 |
| Water cement ratio | 0.35 | 0.35 | 0.35 |
| The mixing amount of the micro silicon powder | 5 | 0 | 4 |
| Compressive strength | 72.8 | 65.4 | 70.3 |
The comparison of 2 and 3 shows that the compressive strength of the concrete added with the silica fume is higher than that of the concrete not added with the silica fume when the same cement amount is used in the raw materials;
the comparison of 1 and 3 shows that the cement consumption in the raw materials used by the concrete sample with larger added micro-silica powder amount is less than that in the raw materials used by the concrete sample with smaller micro-silica powder amount, but the compressive strength of the concrete sample with larger micro-silica powder amount is greater than that of the concrete sample with smaller micro-silica powder amount;
in summary, the following steps: the silica fume can improve the compactness, early strength and durability of concrete, improve the bonding strength between cement paste and aggregate, improve the distribution of pore diameters in the cement paste and achieve the effect of reducing the cement content of the concrete under the same strength by doping the silica fume into the concrete.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The material for reducing cement and improving concrete strength is characterized by comprising the following raw materials in parts by weight: 5-10 parts of calcium lignosulphonate, 3.5-6 parts of phenol, 20 parts of sodium methallyl sulfonate, 20-30 parts of micro silicon powder, 8-15 parts of hydroxypropyl methyl cellulose, 7 parts of bentonite, 10 parts of cyclohexane, 10 parts of defoaming agent and 4 parts of water reducing agent.
2. The material for reducing cement and improving concrete strength as claimed in claim 1, wherein the defoaming agent is one or a mixture of more than two of tributyl phosphate, polyoxypropylene glycerol ether and silicone emulsion.
3. The material for reducing the cement and improving the strength of the concrete according to claim 1, wherein the bentonite is sodium bentonite.
4. The material for reducing cement and improving concrete strength as claimed in claim 1, wherein the silica fume is active glassy silica with a content of more than 85% and a small amount of calcium oxide, magnesium oxide, iron oxide and aluminum oxide.
5. The material for reducing cement and improving concrete strength as claimed in claim 1, wherein the water reducing agent is model JTB-101.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011273206.3A CN112374800A (en) | 2020-11-13 | 2020-11-13 | Material for reducing cement and improving concrete strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011273206.3A CN112374800A (en) | 2020-11-13 | 2020-11-13 | Material for reducing cement and improving concrete strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112374800A true CN112374800A (en) | 2021-02-19 |
Family
ID=74582429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011273206.3A Pending CN112374800A (en) | 2020-11-13 | 2020-11-13 | Material for reducing cement and improving concrete strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112374800A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560082A (en) * | 2008-04-16 | 2009-10-21 | 柳州欧维姆机械股份有限公司 | Ultrahigh-strength active powder concrete and preparation method thereof |
| CN106747093A (en) * | 2016-12-16 | 2017-05-31 | 广东工业大学 | A kind of early strengthening and high strengthening concrete and preparation method thereof |
| CN108545975A (en) * | 2018-04-27 | 2018-09-18 | 成都东蓝星新材料有限公司 | A kind of modified SILICA FUME of gunite concrete |
| CN109809771A (en) * | 2019-03-26 | 2019-05-28 | 江苏蓝圈新材料股份有限公司 | A kind of shield synchronization slip casting |
| CN111807744A (en) * | 2020-08-04 | 2020-10-23 | 重庆思贝肯节能技术开发有限公司 | Foaming cement paste inorganic thickening agent and preparation method and application thereof |
-
2020
- 2020-11-13 CN CN202011273206.3A patent/CN112374800A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560082A (en) * | 2008-04-16 | 2009-10-21 | 柳州欧维姆机械股份有限公司 | Ultrahigh-strength active powder concrete and preparation method thereof |
| CN106747093A (en) * | 2016-12-16 | 2017-05-31 | 广东工业大学 | A kind of early strengthening and high strengthening concrete and preparation method thereof |
| CN108545975A (en) * | 2018-04-27 | 2018-09-18 | 成都东蓝星新材料有限公司 | A kind of modified SILICA FUME of gunite concrete |
| CN109809771A (en) * | 2019-03-26 | 2019-05-28 | 江苏蓝圈新材料股份有限公司 | A kind of shield synchronization slip casting |
| CN111807744A (en) * | 2020-08-04 | 2020-10-23 | 重庆思贝肯节能技术开发有限公司 | Foaming cement paste inorganic thickening agent and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《现代灌浆技术译文集》编译组: "《现代灌浆技术译文集》", 31 August 1991, 水利电力出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104016617B (en) | A concrete reinforcing agent and a preparing method thereof | |
| CN113307591B (en) | Multi-source solid waste composite high-flow-state backfill material and preparation method and application thereof | |
| CN110746165A (en) | Ocean engineering repair mortar and preparation method thereof | |
| CN105541384A (en) | Ultralight foam concrete and preparing method thereof | |
| CN111072366B (en) | Inorganic grouting material capable of stopping open water and reinforcing structure and preparation method and application thereof | |
| CN104944824A (en) | Cement concrete early strength agent and early strength and water reduction agent | |
| CN112851191B (en) | Compact anti-cracking waterproof agent for inhibiting early cracking of concrete and preparation method thereof | |
| CN107352924A (en) | A kind of concrete | |
| CN111732395B (en) | Waste concrete-based regenerated dry powder masonry mortar and preparation method thereof | |
| CN113636767A (en) | Low-carbon cement and preparation method thereof | |
| CN103145362B (en) | A kind of industrial residue prepares the method for cement concrete hardening accelerator | |
| CN112645668A (en) | Steam-curing-free precast concrete and preparation method thereof | |
| CN111943583A (en) | Low-shrinkage high-crack-resistance high-durability long-life concrete and preparation method thereof | |
| Dong-xu et al. | A blended cement containing blast furnace slag and phosphorous slag | |
| CN112851273B (en) | Iron tailing sand-based energy-saving heat-insulating lightweight concrete and preparation method and application thereof | |
| CN110451840B (en) | Composite type compacting agent | |
| CN107746233A (en) | A kind of mortar for building and its production method | |
| CN111377629B (en) | Special efficient expanding agent for concrete filled steel tube and preparation method and application thereof | |
| CN110668777A (en) | Titanium gypsum road curing agent, and preparation and application methods thereof | |
| CN111116127A (en) | Light partition board prepared from coal slime slurry and preparation method thereof | |
| AU2021103591A4 (en) | Curing agent for titanium gypsum road, preparation method and application method thereof | |
| CN114213080B (en) | Recycled concrete | |
| CN114105502B (en) | Cementing material, historic building repair mortar and preparation method thereof | |
| CN112374800A (en) | Material for reducing cement and improving concrete strength | |
| CN113831090B (en) | Large-flow-state anti-seepage impact-resistant grinding hydraulic concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210219 |
|
| WD01 | Invention patent application deemed withdrawn after publication |