CN106007462A - Special additive for high flexural strength concrete - Google Patents
Special additive for high flexural strength concrete Download PDFInfo
- Publication number
- CN106007462A CN106007462A CN201610366531.1A CN201610366531A CN106007462A CN 106007462 A CN106007462 A CN 106007462A CN 201610366531 A CN201610366531 A CN 201610366531A CN 106007462 A CN106007462 A CN 106007462A
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- CN
- China
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- parts
- special additive
- concrete
- polyacrylamide
- ferrous sulfate
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Classifications
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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
- 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
Abstract
The invention discloses a special additive for high flexural strength concrete. The special additive is prepared from the following components in parts by weight: 20-30 parts of hydroxypropyl methyl cellulose, 20-30 parts of polyacrylamide, 3-5 parts of ferrous sulfate, 3-5 parts of ferric nitrate, and 30-54 parts of bentonite; all of the components are 100 parts in total. The special additive has the advantages that the prepared special additive can improve the concrete toughness through a high-molecular polymer, improve the concrete compactness through gel filling, and ensure the internal humidity of the concrete through a water storage material, thereby improving the flexural compression ratio of the concrete; the concrete with relatively high flexural strength can be prepared with relatively low cementing material consumption.
Description
Technical field
The present invention relates to a kind of additive improving concrete fracture resistance.
Background technology
Concrete is a kind of fragile material, and its comprcssive strength is high, rupture strength is low.When it is as the concrete that the antagonism folding requirement of strength such as road or bridge is high, typically by increasing substantially the comprcssive strength of concrete to reach the small elevation of rupture strength, so concrete batching, the gel material content of concrete is big, proportioning cost is high, fragility is big, volume stability is poor, is not a kind of preferable anti-folding preparation method of concrete.
Summary of the invention
Goal of the invention: for the problems referred to above, it is an object of the invention to provide a kind of additive improving concrete fracture resistance, it is not necessary to improve concrete flexural strength with the bigger gel material content of increase.
Technical scheme: a kind of high anti-folding concrete special additive, comprising by each component of following weight: carboxylic propyl methocel 20-30 part, polyacrylamide 20-30 part, ferrous sulfate 3-5 part, ferric nitrate 3-5 part, bentonite 30-54 part, each component amounts to totally 100 parts.
The viscosity of described carboxylic propyl methocel is 40000mPa s.
The molecular weight of described polyacrylamide is 600-1200 ten thousand, and ion degree is 10-40%.
Described ferrous sulfate, ferric nitrate are analytical pure.
Described bentonitic fineness is 400-600 mesh.
Optimal, described height anti-folding concrete special additive, comprise by each component of following weight: carboxylic propyl methocel 22 parts, polyacrylamide 22 parts, 3 parts of ferrous sulfate, ferric nitrate 3 parts, bentonite 50 parts.
Optimal, described height anti-folding concrete special additive, comprise by each component of following weight: carboxylic propyl methocel 25 parts, polyacrylamide 27 parts, 3 parts of ferrous sulfate, ferric nitrate 4 parts, bentonite 51 parts.
Optimal, described height anti-folding concrete special additive, comprise by each component of following weight: carboxylic propyl methocel 28 parts, polyacrylamide 25 parts, 4 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 48 parts.
Optimal, described height anti-folding concrete special additive, comprise by each component of following weight: carboxylic propyl methocel 20 parts, polyacrylamide 28 parts, 3 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 44 parts.
Optimal, described height anti-folding concrete special additive, comprise by each component of following weight: carboxylic propyl methocel 28 parts, polyacrylamide 22 parts, 3 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 42 parts.
Beneficial effect: compared with prior art, the invention have the advantage that this special additive of preparation improves the toughness of concrete by high molecular polymer, by the degree of compaction of gel-filled raising concrete, by the humidity of water-storage material guarantee inside concrete, the bend-press ratio of concrete can be improved, the concrete that rupture strength is higher can be made under relatively low gel material content.
Detailed description of the invention
Below in conjunction with specific embodiment, it is further elucidated with the present invention, it should be understood that these embodiments are merely to illustrate the present invention rather than limit the scope of the present invention, after having read the present invention, those skilled in the art all fall within the application claims limited range to the amendment of the various equivalent form of values of the present invention.
Embodiment 1:
A kind of high anti-folding concrete special additive, in terms of gross weight 100 parts, by carboxylic propyl methocel 20 parts, polyacrylamide 20 parts, 3 parts of ferrous sulfate, ferric nitrate 3 parts, bentonite 54 parts, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
The viscosity of carboxylic propyl methocel is 40000mPa s；The molecular weight of polyacrylamide is 600-1200 ten thousand, and ion degree is 10-40%；Ferrous sulfate, ferric nitrate are analytical pure；Bentonitic fineness is 400-600 mesh.
Embodiment 2:
It is, in terms of gross weight 100 parts, by carboxylic propyl methocel 30 parts, polyacrylamide 30 parts, 5 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 30 parts with embodiment 1 difference, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
Embodiment 3:
It is, in terms of gross weight 100 parts, by carboxylic propyl methocel 22 parts, polyacrylamide 22 parts, 3 parts of ferrous sulfate, ferric nitrate 3 parts, bentonite 50 parts with embodiment 1 difference, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
Embodiment 4:
It is, in terms of gross weight 100 parts, by carboxylic propyl methocel 25 parts, polyacrylamide 27 parts, 3 parts of ferrous sulfate, ferric nitrate 4 parts, bentonite 51 parts with embodiment 1 difference, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
Embodiment 5:
It is, in terms of gross weight 100 parts, by carboxylic propyl methocel 28 parts, polyacrylamide 25 parts, 4 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 48 parts with embodiment 1 difference, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
Embodiment 6:
It is, in terms of gross weight 100 parts, by carboxylic propyl methocel 20 parts, polyacrylamide 28 parts, 3 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 44 parts with embodiment 1 difference, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
Embodiment 7:
It is, in terms of gross weight 100 parts, by carboxylic propyl methocel 28 parts, polyacrylamide 22 parts, 3 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 42 parts with embodiment 1 difference, mix, pouring homogenizer into stir, mixing time is 5-10min, discharging and get final product.
By the additive of embodiment 1-7, according to the one thousandth of concrete gel material gross mass, it is incorporated into respectively in the C30 commerical ready-mixed concrete of match ratio listed in Table, unit: kg/m3:
| Cement | Breeze | Flyash | Sand | Rubble | Water reducer | Water |
| 200 | 80 | 60 | 780 | 1080 | 6.5 | 170 |
Contrasting with the benchmark sample being not incorporated into anti-folding additive, anti-folding and comprcssive strength result are as follows:
| 28d comprcssive strength (MPa) | 28d rupture strength (MPa) | |
| Benchmark sample | 35.5 | 3.7 |
| Mix embodiment 1 by sample | 33.7 | 5.4 |
| Mix embodiment 2 by sample | 34.0 | 5.9 |
| Mix embodiment 3 by sample | 33.2 | 5.6 |
| Mix embodiment 4 by sample | 34.2 | 5.6 |
| Mix embodiment 5 by sample | 33.9 | 5.7 |
| Mix embodiment 6 by sample | 35.0 | 5.6 |
| Mix embodiment 7 by sample | 34.9 | 5.8 |
Visible, compared with benchmark sample, slightly declined by the 28d comprcssive strength of sample, but rupture strength is significantly improved, illustrated that the high anti-folding concrete special additive of the present invention has preferable using effect.
Claims (10)
1. one kind high anti-folding concrete special additive, it is characterized in that comprising by each component of following weight: carboxylic propyl methocel 20-30 part, polyacrylamide 20-30 part, ferrous sulfate 3-5 part, ferric nitrate 3-5 part, bentonite 30-54 part, each component amounts to totally 100 parts.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that: the viscosity of described carboxylic propyl methocel is 40000mPa s.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that: the molecular weight of described polyacrylamide is 600-1200 ten thousand, and ion degree is 10-40%.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that: described ferrous sulfate, ferric nitrate are analytical pure.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that: described bentonitic fineness is 400-600 mesh.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that comprise by each component of following weight: carboxylic propyl methocel 22 parts, polyacrylamide 22 parts, 3 parts of ferrous sulfate, ferric nitrate 3 parts, bentonite 50 parts.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that comprise by each component of following weight: carboxylic propyl methocel 25 parts, polyacrylamide 27 parts, 3 parts of ferrous sulfate, ferric nitrate 4 parts, bentonite 51 parts.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that comprise by each component of following weight: carboxylic propyl methocel 28 parts, polyacrylamide 25 parts, 4 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 48 parts.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that comprise by each component of following weight: carboxylic propyl methocel 20 parts, polyacrylamide 28 parts, 3 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 44 parts.
The high anti-folding concrete special additive of one the most according to claim 1, it is characterised in that comprise by each component of following weight: carboxylic propyl methocel 28 parts, polyacrylamide 22 parts, 3 parts of ferrous sulfate, ferric nitrate 5 parts, bentonite 42 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366531.1A CN106007462A (en) | 2016-05-30 | 2016-05-30 | Special additive for high flexural strength concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366531.1A CN106007462A (en) | 2016-05-30 | 2016-05-30 | Special additive for high flexural strength concrete |
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| Publication Number | Publication Date |
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| CN106007462A true CN106007462A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610366531.1A Pending CN106007462A (en) | 2016-05-30 | 2016-05-30 | Special additive for high flexural strength concrete |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141267A (en) * | 1996-02-09 | 1997-01-29 | 张耀伦 | High anti-break and high strength slag cement without clinker and burning |
| JP2000290051A (en) * | 1999-04-07 | 2000-10-17 | Seltec Corp | Thickening additive for water permeable concrete and production of water permeable concrete using same |
| CN1559966A (en) * | 2004-02-26 | 2005-01-05 | 同济大学 | Addition for concrete of road for enhacing anti-bending strength |
| CN1958502A (en) * | 2005-10-31 | 2007-05-09 | 兰州海锋建材科技有限公司 | Water-soluble anticarack gelatine powder, and application in building materials of powder |
| CN102351457A (en) * | 2011-07-12 | 2012-02-15 | 长安大学 | Additive capable of improving flexural strength of cement concrete and application method thereof |
| CN104446115A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | Concrete synergist |
-
2016
- 2016-05-30 CN CN201610366531.1A patent/CN106007462A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141267A (en) * | 1996-02-09 | 1997-01-29 | 张耀伦 | High anti-break and high strength slag cement without clinker and burning |
| JP2000290051A (en) * | 1999-04-07 | 2000-10-17 | Seltec Corp | Thickening additive for water permeable concrete and production of water permeable concrete using same |
| CN1559966A (en) * | 2004-02-26 | 2005-01-05 | 同济大学 | Addition for concrete of road for enhacing anti-bending strength |
| CN1958502A (en) * | 2005-10-31 | 2007-05-09 | 兰州海锋建材科技有限公司 | Water-soluble anticarack gelatine powder, and application in building materials of powder |
| CN102351457A (en) * | 2011-07-12 | 2012-02-15 | 长安大学 | Additive capable of improving flexural strength of cement concrete and application method thereof |
| CN104446115A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | Concrete synergist |
Non-Patent Citations (2)
| Title |
|---|
| 冯浩等: "《混凝土外加剂工程应用手册（第二版）》", 30 November 2005 * |
| 沈家洪等: "《膨润土改性水泥砂浆初探》", 《铁道物资科学管理》 * |
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Application publication date: 20161012 |
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