CN108455897A - A kind of anti-crack concrete additive - Google Patents
A kind of anti-crack concrete additive Download PDFInfo
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- CN108455897A CN108455897A CN201810539348.6A CN201810539348A CN108455897A CN 108455897 A CN108455897 A CN 108455897A CN 201810539348 A CN201810539348 A CN 201810539348A CN 108455897 A CN108455897 A CN 108455897A
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- aqueous solution
- acid ester
- rust
- carboxylic acid
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a kind of anti-crack concrete additives, are made by the raw material of following weight parts：40 50 parts of polycarboxylate water-reducer, 10 15 parts of the resin containing N methyl N benzyl acetamides in 10 20 parts of polypropylene fibre, repetitive unit, 15 18 parts of silane coupling agent；The additive greatly improves the toughness for greatly promoting concrete, to make it have preferable cracking resistance.
Description
Technical field
The present invention relates to construction material, more particularly to a kind of anti-crack concrete additive.
Background technology
Concrete is the general name of the cement base mixing material made by other anticracking materials using concrete as matrix, due to,
Anti-crack concrete can be very good to inhibit the development in crack and can improve concrete multiple performance, so anti-crack concrete is to change
The effective ways of kind concrete stress performance.But the more concern of people for a long time, the enhancing effect of single concrete, thing
Different types of fibrous material is different to the enhancing effect of concrete in reality.Some can improve the preliminary examination cracking degree of concrete
Concrete cracking is prevented, degree of participation limits fracture width development after some can improve concrete cracking, some have antiknock
Fire resistance property etc. complementary can just mix effect between them by different fibrous materials according to fibrous material theory to generate
Answer, can achieve the effect that 1 plus 1 be more than two, to generate dependable performance and with preferable economic and social benefits novel height
Performance fibers material.With easily molded, low energy consumption, and durability is good cheap and is combined with steel and can be made into various load-bearing machines
The advantages of structure is that the present age most widely used construction material plays a very important role the development of human society.It is mixed at present
That there is also toughness is poor for solidifying soil, brittleness is big, dry shrinks big, easy the deficiencies of cracking.
Existing anti-crack concrete Tensile strength is low, and the low shock resistance of flexural strength is poor, therefore we need to carry
For a kind of novel anti-crack concrete material, to promote the toughness of concrete.
Invention content
The present invention provides a kind of anti-crack concrete additive, the toughness of concrete is greatly promoted, to make it have preferably
Cracking resistance.
To solve the above-mentioned problems, the technical solution adopted by the present invention is such, a kind of anti-crack concrete additive, by
The raw material of following weight parts is made：40-50 parts of polycarboxylate water-reducer contains N- first in 10-20 parts of polypropylene fibre, repetitive unit
10-15 parts of the resin of base-N- benzyl acetamides, 15-18 parts of silane coupling agent；
The resin is with one of lower structure：
Preferably, the anti-crack concrete additive is made by the raw material of following weight parts：40 parts of polycarboxylate water-reducer,
12 parts of resin in 15 parts of polypropylene fibre, repetitive unit containing N- methyl-iV-benzyl acetamides, 18 parts of silane coupling agent.
Preferably, the polycarboxylate water-reducer is prepared by lower section method：The aqueous solution of molecular weight regulator is put into
In reaction kettle bottom, respectively by N, the mixed aqueous solution of N- dimethacrylates and methoxy polyoxyethylene ether metacrylic acid ester
It is added dropwise in reaction kettle with the aqueous solution of polymerization initiator, after completion of dropwise addition, stirs 3-5h, wait for after reaction, being cooled to 40
DEG C hereinafter, with alkaline solution be neutralized to pH to 6-8 to get.
N, the polycarboxylic acids that N- dimethacrylates and methoxy polyoxyethylene ether metacrylic acid ester are prepared is selected to subtract
Aqua and the better compatibility of cement better disperse performance, little loss of slump to obtain.
It is further preferred that N, N- dimethacrylate and methoxy polyoxyethylene ether metacrylic acid ester molar ratio are
10：1-5.
Preferably, first in the mixed aqueous solution of N, N- dimethacrylate and methoxy polyoxyethylene ether metacrylic acid ester
A concentration of 30-40wt% of base acrylic acid, methoxy polyoxyethylene ether metacrylic acid ester 10-15wt%.
Preferably, a concentration of 4-5wt% of the aqueous solution middle-molecular-weihydroxyethyl conditioning agent of the molecular weight regulator, molecular weight
The one kind of conditioning agent in 3- mercaptopropionic acids, thioacetic acid or mercaptoethanol.
Preferably, in the polymerization initiator polymerization initiator a concentration of 5-15wt%, polymerization initiator was selected from
Sulfate or benzoyl peroxide.
Preferably, the methoxy polyoxyethylene ether metacrylic acid ester is as shown in I：
Wherein n=20-60.
Advantageous effect：Pass through the resin and silicon containing N- methyl-iV-benzyl acetamides in polypropylene fibre, repetitive unit
The addition of alkane coupling agent improves toughness of concrete and impact resistance, improves durability and crack resistance.
Specific implementation mode
In order to deepen the understanding of the present invention, below in conjunction with embodiment and table, the invention will be further described, should
Embodiment is only used for explaining the present invention, is not intended to limit the scope of the present invention..
The preparation of 1 poly carboxylic acid series water reducer of embodiment
3- mercaptopropionic acid 40g and 1L water is put into reaction kettle bottom, stirring is warming up to 75 DEG C, respectively by 40wt%N, N-
Mixed aqueous solution (N, the N- diformazan of dimethacrylate and 10wt% methoxy polyoxyethylenes ether metacrylic acid ester (n=27)
Base acrylic acid is 1mol, and methoxy polyoxyethylene ether metacrylic acid ester is 0.2mol) and polymerization initiator 100ml 5wt% mistakes
The aqueous solution of sodium sulphate is added dropwise in reaction kettle, after completion of dropwise addition, stir 3-5h, wait for after reaction, be cooled to 40 DEG C hereinafter,
PH to 6-8 is neutralized to get poly carboxylic acid series water reducer I with alkaline solution.
Embodiment 2
3- mercaptopropionic acid 40g and 1L water is put into reaction kettle bottom, stirring is warming up to 75 DEG C, respectively by 40wt%N, N-
Mixed aqueous solution (N, the N- dimethyl of dimethacrylate and 5wt% methoxy polyoxyethylenes ether metacrylic acid ester (n=27)
Acrylic acid is 1mol, and methoxy polyoxyethylene ether metacrylic acid ester is 0.1mol) and polymerization initiator 100ml 5wt% over cures
The aqueous solution of sour sodium is added dropwise in reaction kettle, after completion of dropwise addition, stir 3-5h, wait for after reaction, be cooled to 40 DEG C hereinafter, with
Alkaline solution is neutralized to pH to 6-8 to get poly carboxylic acid series water reducer II.
3 anti-crack concrete additive I of embodiment
I 40 parts of poly carboxylic acid series water reducer, 15 parts of polypropylene fibre, structural formula 12 parts of resin as shown in (1) are silane coupled
18 parts of agent.
Wherein n=50-100；
4 anti-crack concrete additive II of embodiment
II 40 parts of poly carboxylic acid series water reducer, 12 parts of the resin of 15 parts of polypropylene fibre, structural formula as shown in (2), silane
18 parts of coupling agent.
Wherein, n=50-100.
Application Example 1
Using reference cement, it is respectively 0.5wt% that anti-crack concrete additive I and II, which consolidates volume, and concrete I and II is made
Experimental result is as shown in table 1：
Table 1
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of anti-crack concrete additive, which is characterized in that be made by the raw material of following weight parts：Polycarboxylate water-reducer 40-
50 parts, 10-15 parts of the resin containing N- methyl-iV-benzyl acetamides in 10-20 parts of polypropylene fibre, repetitive unit, silane
15-18 parts of coupling agent；
The resin is with one of lower structure：
Wherein, n=50-100.
2. a kind of anti-crack concrete additive according to claim 1, which is characterized in that by the raw material system of following weight parts
：40 parts of polycarboxylate water-reducer, the resin containing N- methyl-iV-benzyl acetamides in 15 parts of polypropylene fibre, repetitive unit
12 parts, 18 parts of silane coupling agent.
3. a kind of anti-crack concrete additive according to claim 1 or 2, which is characterized in that the polycarboxylic acids diminishing
Agent is prepared by lower section method：The aqueous solution of molecular weight regulator is put into reaction kettle bottom, respectively by N, N- dimethyl propylenes
The aqueous solution of the mixed aqueous solution and polymerization initiator of olefin(e) acid and methoxy polyoxyethylene ether metacrylic acid ester is added dropwise to reaction
In kettle, after completion of dropwise addition, 3-5h is stirred, waits for after reaction, being cooled to 40 DEG C hereinafter, be neutralized to pH to 6-8 with alkaline solution,
To obtain the final product.
4. a kind of rust-proof type poly carboxylic acid series water reducer according to claim 3, which is characterized in that N, N- dimethacrylate
It is 10 with methoxy polyoxyethylene ether metacrylic acid ester molar ratio：1-5.
5. a kind of rust-proof type poly carboxylic acid series water reducer according to claim 3, which is characterized in that N, N- dimethacrylate
With a concentration of 30-40wt% of methacrylic acid in the mixed aqueous solution of methoxy polyoxyethylene ether metacrylic acid ester, methoxy
Base polyethenoxy ether metacrylic acid ester 10-15wt%.
6. a kind of rust-proof type poly carboxylic acid series water reducer according to claim 3, which is characterized in that the molecular-weight adjusting
A concentration of 4-5wt% of the aqueous solution middle-molecular-weihydroxyethyl conditioning agent of agent, molecular-weight adjusting are selected from 3- mercaptopropionic acids, thioacetic acid or mercapto
One kind in base ethyl alcohol.
7. a kind of rust-proof type poly carboxylic acid series water reducer according to claim 3, which is characterized in that the polymerization initiator
A concentration of 5-15wt% of middle polymerization initiator, polymerization initiator are selected from persulfate or benzoyl peroxide.
8. a kind of rust-proof type poly carboxylic acid series water reducer according to claim 3, which is characterized in that the methoxyl group polyoxy second
Alkene ether metacrylic acid ester is as shown in I：
Wherein n=20-60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810539348.6A CN108455897A (en) | 2018-05-30 | 2018-05-30 | A kind of anti-crack concrete additive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539348.6A CN108455897A (en) | 2018-05-30 | 2018-05-30 | A kind of anti-crack concrete additive |
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| CN108455897A true CN108455897A (en) | 2018-08-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558455A (en) * | 2011-12-26 | 2012-07-11 | 东华理工大学 | Low-dosage high-water-reduction type polycarboxylic acid water reducer and preparation method thereof |
| CN106278016A (en) * | 2016-07-26 | 2017-01-04 | 蚌埠市方阵商品混凝土有限公司 | A kind of concrete with excellent shock resistance and abrasion resistance properties |
| CN106587842A (en) * | 2016-12-16 | 2017-04-26 | 江苏道润工程技术有限公司 | Semi-flexible pavement material, preparation method therefor and semi-flexible pavement |
| CN107459278A (en) * | 2017-06-22 | 2017-12-12 | 甘肃智通科技工程检测咨询有限公司 | A kind of gunite concrete low-alkali liquid quick-setting agent and preparation method thereof |
| CN107501481A (en) * | 2017-09-07 | 2017-12-22 | 上海高铁化学建材有限公司 | One kind crosslinking collapse protective poly-carboxylic acid water reducing agent and preparation method thereof |
-
2018
- 2018-05-30 CN CN201810539348.6A patent/CN108455897A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558455A (en) * | 2011-12-26 | 2012-07-11 | 东华理工大学 | Low-dosage high-water-reduction type polycarboxylic acid water reducer and preparation method thereof |
| CN106278016A (en) * | 2016-07-26 | 2017-01-04 | 蚌埠市方阵商品混凝土有限公司 | A kind of concrete with excellent shock resistance and abrasion resistance properties |
| CN106587842A (en) * | 2016-12-16 | 2017-04-26 | 江苏道润工程技术有限公司 | Semi-flexible pavement material, preparation method therefor and semi-flexible pavement |
| CN107459278A (en) * | 2017-06-22 | 2017-12-12 | 甘肃智通科技工程检测咨询有限公司 | A kind of gunite concrete low-alkali liquid quick-setting agent and preparation method thereof |
| CN107501481A (en) * | 2017-09-07 | 2017-12-22 | 上海高铁化学建材有限公司 | One kind crosslinking collapse protective poly-carboxylic acid water reducing agent and preparation method thereof |
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Application publication date: 20180828 |