CN105621930A

CN105621930A - Mud-resistant and low-sensitive water reducer

Info

Publication number: CN105621930A
Application number: CN201510980335.9A
Authority: CN
Inventors: 谭贝; 王健; 钟康
Original assignee: Hunan Zhong Yan Building Materials Science And Technology Ltd
Current assignee: Hunan Zhong Yan Building Materials Science And Technology Ltd
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2016-06-01

Abstract

The invention provides a mud-resistant and low-sensitive water reducer. The water reducer comprises the following components in percentage by weight: 25-37.5% of a water reducer mother liquor, 0.8-3.5% of a retarder, 0.05-0.15% of an air entraining agent, 0.01-0.1% of a defoamer, 0.3-2.5% of a mud-resistant agent and 0.5-2% of a viscosity regulator. The mud-resistant agent is a water-based concrete mud-resistant agent and is low in raw material cost, simple in synthetic process and good in mud-resistant effect; the acrylic viscosity regulator is a water-based thickening and desensitizing agent, is easily dissolved in water and can solve the problems of poor solubility, short shelf time and poor property of compounding with other like product for a water-retaining, thickening and desensitizing component of an existing concrete water reducer in an additive product; and the mud-resistant and low-sensitive water reducer can remarkably solve the problems that an existing raw material contains mud and is sensitive, has an extremely good effect for working performances such as concrete workability, setting time and the like, and can meet various concrete performance requirements.

Description

A kind of anti-mud hypoallergenic type water reducer

Technical field

The present invention relates to concrete field, particularly to a kind of anti-mud hypoallergenic type water reducer.

Background technology

Concrete has former material to be enriched, cheap, and the simple advantage of production technology also has comprcssive strength height, good endurance, the features such as antidetonation fire-resistant plastic is high, strength grade wide ranges simultaneously concurrently, therefore concrete amount is increasing.

Increasing along with concrete amount, concrete raw material starts very different. Concrete performance and quality are directly affected containing mud in raw material especially sandstone inferior. Adsorbing a large amount of additive containing mud in concrete raw material sandstone, cause that concrete flowability is poor, water requirement is big, and slump-loss is big, easy bleeding. On market, existing anti-mud agent kind is many, and effect differs, and synthetically prepared raw material is many, complex process, and cost is high.

For the concrete raw material containing mud weight, concrete generally improves water reducer water-reducing rate, for offsetting containing the mud absorption to additive, but so easily causes concrete to water reducer sensitive issue. When low-dosage, concrete easy property alive is poor, and high additive concrete is easy bleeding isolation again. For this phenomenon, the composite viscosity modifier that can add of cement water reducing agent, but existing viscosity modifier on the market is generally adopted cellulose ethers, and cellulose ethers material poorly water-soluble, addition content is few, acts on little.

Summary of the invention

In view of this, it is contemplated that propose a kind of anti-mud hypoallergenic type water reducer, by adding anti-mud agent and viscosity modifier can reduce concrete raw material containing the mud absorption to additive, the concrete sensitivity to additive can be reduced simultaneously, reduce concrete and surpass the risk mixed.

For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:

The present invention provides a kind of anti-mud hypoallergenic type water reducer, and its component and constituent content are respectively as follows:

Water reducer mother solution 25%-37.5%

Retarder 0.8%-3.5%;

Air entraining agent 0.05%-0.15%;

Defoamer 0.01%-0.1%;

Anti-mud agent 0.3%-2.5%;

Viscosity modifier 0.5%-2%.

Preferably, described water reducer mother solution be 40% solid containing high performance water reducing agent of polyocarboxy acid mother solution.

Preferably, described retarder is at least one in sodium gluconate, white sugar, citric acid monohydrate.

Preferably, described air entraining agent is at least one in polyether phosphate, sodium lauryl sulphate.

Preferably, described defoamer is polyethers concrete defoamer.

Preferably, described anti-mud agent is the anti-mud agent of sulfonate radical base class.

Preferably, the modified polyether of unsaturated double-bond and unsaturated esters and derivant are dissolved in bottom in advance, add persulfuric acid ammonium salt and metallic catalyst is initiator, carry out dropping and the stirring of sulfonate group monomer with certain speed simultaneously, add the dilution of quantitative deionized water after dropping completely, regulate PH and namely prepare the anti-mud agent of described sulfonate radical base class.

Preferably, described viscosity modifier is acrylic compounds viscosity modifier.

Preferably, the modified polyether that acrylic polymer embeds is dissolved in bottom in advance, after adding initiator, drip acrylamide and TGA and 2-(Acryloyloxy)ethanol with given pace and stirred, add the dilution of quantitative deionized water after dropping completely, then regulate PH and namely prepare described acrylic compounds viscosity modifier.

Preferably, described initiator is hydrogen peroxide and persulfuric acid ammonium salt.

In described anti-mud hypoallergenic type water reducer provided by the invention, the anti-mud agent of sulfonate radical base class is a kind of water system agent on crack resistance of concrete mud agent, and the cost of raw material is low, and synthesis technique is simple, and anti-mud is effective; Its acrylic compounds viscosity modifier drops quick dose for a kind of water system thickening, and soluble in water, can effectively solve existing concrete water reducer water-keeping thickening and drop the problem that quick component is poorly soluble in additive product, shelf lives is short and other like product plyability is poor; Described anti-mud hypoallergenic type water reducer can significantly solve existing raw material containing mud and sensitive question; The concrete work service behaviour such as easy property and setting time is had fabulous effect by described anti-mud hypoallergenic type water reducer formula, can meet the requirement of concrete properties.

Accompanying drawing explanation

The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention. In the accompanying drawings:

Fig. 1 is each material usage figure of concrete optimum;

Fig. 2 is the measurement result figure of embodiment 1 to embodiment 3.

Detailed description of the invention

It should be noted that when not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined. Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

Embodiment 1

Weighing 958.4g water, be sequentially added into water reducer mother solution 25g, retarder 8g, defoamer 0.1g, air entraining agent 0.5g, viscosity modifier 5g, anti-mud agent 3g, mix homogeneously prepares described anti-mud hypoallergenic type water reducer 1kg after stirring 5 minutes.

Wherein, retarder is citric acid monohydrate, and air entraining agent is polyether phosphate, defoamer synthesizes concrete defoamer for polyethers, water reducer mother solution is 40% solid containing high performance water reducing agent of polyocarboxy acid mother solution, and viscosity modifier is acrylic compounds viscosity modifier, the anti-mud anti-mud agent of agent sulfonate group class.

Embodiment 2

Weighing 880g water, be sequentially added into water reducer mother solution 37.5g, retarder 35g, defoamer 1g, air entraining agent 1.5g, viscosity modifier 20g, anti-mud agent 25g, mixing and stirring prepares described anti-mud hypoallergenic type water reducer 1kg after 5 minutes.

Wherein, retarder is sodium gluconate, and air entraining agent is sodium lauryl sulphate, defoamer is polyethers concrete defoamer, water reducer mother solution is 40% solid containing high performance water reducing agent of polyocarboxy acid mother solution, and viscosity modifier is acrylic compounds viscosity modifier, the anti-mud anti-mud agent of agent sulfonate group class.

Embodiment 3

Weighing 921.5g water, be sequentially added into water reducer mother solution 30g, retarder 21g, defoamer 0.5g, air entraining agent 1g, viscosity modifier 12g, anti-mud agent 14g, mixing and stirring prepares described anti-mud hypoallergenic type water reducer 1kg after 5 minutes.

Wherein, retarder is white sugar, and air entraining agent is sodium lauryl sulphate, defoamer is polyethers concrete defoamer, water reducer mother solution is 40% solid containing high performance water reducing agent of polyocarboxy acid mother solution, and viscosity modifier is acrylic compounds viscosity modifier, the anti-mud anti-mud agent of agent sulfonate group class.

In embodiment 1 to embodiment 3, the preparation method of described sulfonate radical base class anti-mud agent is: the modified polyether of unsaturated double-bond and unsaturated esters and derivant are dissolved in bottom in advance, add persulfuric acid ammonium salt and metallic catalyst is initiator, carry out dropping and the stirring of sulfonate group monomer with certain speed simultaneously, add the dilution of quantitative deionized water after dropping completely, regulate PH and namely prepare.

In embodiment 1 to embodiment 3, the preparation method of described acrylic compounds viscosity modifier is: the modified polyether that acrylic polymer embeds is dissolved in bottom in advance, after adding initiator, drip acrylamide and TGA and 2-(Acryloyloxy)ethanol with given pace and stirred, add the dilution of quantitative deionized water after dropping completely, then regulate PH and namely prepare.

During test, carrying out concrete optimum according to C30 concrete strength design mixture proportion, each material usage of concrete mix is shown in Fig. 1.

Cement water reducing agent prepared by embodiment 1-embodiment 3 is applied in above-mentioned concrete optimum, cement water reducing agent consumption adopts the 1.2% of glue material (concrete and coal ash+breeze) consumption, carrying out concrete performance mensuration according to the method in the standards such as GB/50152-92, measurement result is shown in Fig. 2.

From examining and determine achievement data above, anti-mud hypoallergenic type water reducer of the present invention can make the every Testing index of fresh concrete be substantially better than present market ordinary water-reducing agent, particularly to significantly solve the admixture dosage height that concrete causes containing mud because of raw material, cost is high, concrete loss is big, the problem of easy sexual state difference of living and easily bleeding isolation.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims

1. an anti-mud hypoallergenic type water reducer, it is characterised in that its component and constituent content are respectively as follows:

Water reducer mother solution 25%-37.5%;

Retarder 0.8%-3.5%;

Air entraining agent 0.05%-0.15%;

Defoamer 0.01%-0.1%;

Anti-mud agent 0.3%-2.5%;

Viscosity modifier 0.5%-2%.

2. one according to claim 1 anti-mud hypoallergenic type water reducer, it is characterised in that described water reducer mother solution be 40% solid containing high performance water reducing agent of polyocarboxy acid mother solution.

3. one according to claim 1 anti-mud hypoallergenic type water reducer, it is characterised in that described retarder is at least one in sodium gluconate, white sugar, citric acid monohydrate.

4. one according to claim 1 anti-mud hypoallergenic type water reducer, it is characterised in that described air entraining agent is at least one in polyether phosphate, sodium lauryl sulphate.

5. one according to claim 1 anti-mud hypoallergenic type water reducer, it is characterised in that described defoamer is polyethers concrete defoamer.

6. one according to claim 1 anti-mud hypoallergenic type water reducer, it is characterised in that described anti-mud agent is the anti-mud agent of sulfonate radical base class.

7. one according to claim 6 anti-mud hypoallergenic type water reducer, it is characterized in that, the modified polyether of unsaturated double-bond and unsaturated esters and derivant are dissolved in bottom in advance, add persulfuric acid ammonium salt and metallic catalyst is initiator, carry out dropping and the stirring of sulfonate group monomer with certain speed simultaneously, add the dilution of quantitative deionized water after dropping completely, regulate PH and namely prepare the anti-mud agent of described sulfonate radical base class.

8. one according to claim 1 anti-mud hypoallergenic type water reducer, it is characterised in that described viscosity modifier is acrylic compounds viscosity modifier.

9. one according to claim 8 anti-mud hypoallergenic type water reducer, it is characterized in that, the modified polyether that acrylic polymer embeds is dissolved in bottom in advance, after adding initiator, drip acrylamide and TGA and 2-(Acryloyloxy)ethanol with given pace and stirred, add the dilution of quantitative deionized water after dropping completely, then regulate PH and namely prepare described acrylic compounds viscosity modifier.

10. one according to claim 9 anti-mud hypoallergenic type water reducer, it is characterised in that described initiator is hydrogen peroxide and persulfuric acid ammonium salt.