CN106365498A - Poly carboxylic acid water reducing agent and preparation method thereof - Google Patents

Abstract

The invention discloses a poly carboxylic acid water reducing agent. The poly carboxylic acid water reducing agent is prepared from the following components in parts by mass: 10 to 30 parts of poly carboxylic acid water reducing agent mother liquor, 5 to 10 parts of alcohol amine compounds, 5 to 10 parts of a cellulose water-retaining material, 1 to 5 parts of a catalyst and 10 to 20 parts of a sulphonating agent. A preparation method of the poly carboxylic acid water reducing agent comprises the following steps: adding the poly carboxylic acid water reducing agent mother liquor, the alcohol amine compounds, the cellulose water-retaining material, the catalyst, the sulphonating agent and tap water into a reaction kettle in sequence; stirring for about 20 minutes to dissolve the components into a uniform solution to obtain the poly carboxylic acid water reducing agent. Compared with the prior art, the poly carboxylic acid water reducing agent has the beneficial effects of high water reducing rate, low slump loss and high adaptability to cement, and also has a coagulation delaying effect.

Description

A kind of polycarboxylate water-reducer and preparation method thereof

Technical field

The present invention relates to technical field of concrete additives, particularly to a kind of polycarboxylate water-reducer and preparation method thereof.

Background technology

Poly carboxylic acid series water reducer is the very excellent third generation water reducer of combination property, begins to from late 1980s In developed country's production applications such as Japan, Germany, the U.S..It has, and water-reducing rate is high, concrete slump gradual loss is little, volume Low, big to concrete strength contribution, many advantages, such as the feature of environmental protection is good, from high-speed railway to city Concrete Mixing Station, state Interior many application enterprises start to select polycarboxylate water-reducer as the requisite BSA of concrete.Cement water reducing agent is made For a kind of new material, not only can improve the level of Building technology, improve the performance of concrete, substantial amounts of cement can also be saved And manpower and materials, there is higher value, the fact that this has been well recognized as.

However, the raw material due to producing needed for high performance concrete has strict requirements, no matter sand, the clay content of stone or The fineness of flyash and the amount of making a fire have strict requirements, so the high efficiency water reducing agent for construction high performance concrete requires Equally strict, the bleed composition of the either water-reducing rate of water reducer, or water reducer all can have influence on the matter of high performance concrete Amount.

High efficiency water reducing agent performance in the market is single, only has diminishing function, and the cement for different manufacturers Adaptability is different could to change its adaptability it is necessary to passing through and compounding other materials, and is difficult to control to.

Content of the invention

The present invention is directed to defect present in prior art, now provides a kind of polycarboxylate water-reducer and preparation method thereof, should Water reducer water-reducing rate is high, and loss of slump is little, and the strong adaptability with cement also has deferred action.

For achieving the above object, the present invention adopts following technical proposals:

A kind of polycarboxylate water-reducer, the following component including by mass percentage: 10～30 parts of polycarboxylate superplasticizer mother liquor, 5 ～10 parts of alcamine compounds, 5～10 parts of cellulose water-keeping materials, 1～5 part of catalyst, 10～20 parts of sulfonating agents.

Preferably, described polycarboxylate superplasticizer mother liquor is acrylic compounds, methacrylic or maleic anhydride class polycarboxylic acids It is diminishing mother solution.

Preferably, described alcamine compound is one of triethanolamine, triisopropanolamine, the different hydramine of diethanol list.

Preferably, described cellulose water-keeping material is methylcellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl fiber One of element.

Preferably, described catalyst is alkali metal hydroxide, carbonate or bicarbonate.

Preferably, described sulfonating agent is chlorosulfonic acid, concentrated sulphuric acid or sulfur trioxide.

The preparation method of described polycarboxylate water-reducer is as follows:

Comprise the following steps: put into polycarboxylate superplasticizer mother liquor, alcamine compound, cellulose water conservation material in a kettle. successively Material, catalyst, sulfonating agent and tap water, stirring makes it be dissolved into homogeneous solution in 20 minutes about, obtains polycarboxylate water-reducer.

The present invention compared with prior art, have the advantages that polycarboxylic-acid diminishing mother solution can substantially reduce and With water, using water wisely, promote early strong；Not only contained amino in alcamine compound molecule but also contained hydroxyl, there is the comprehensive of amine and alcohol Close performance, as surfactant, there is good dispersibility, also as early strength agent, improve early, the later strength of cement；Fiber Plain water-keeping material can in concrete effective water conservation, and slowly discharged part moisture with aquation, be that the aquation of cement carries Watering, improves strength of cement, and cellulose water-keeping material also has model retention effect simultaneously, reduces the gradual loss of concrete, also There is certain deferred action；Highly active catalyst, improves reaction rate, and oil-soluble unsaturation minor comonomer is made Emulsion, carries out emulsion polymerization, and polymerization speed is fast, and conversion rate of products is high, the stable performance of prepared polycarboxylate water-reducer, and molecule is tied Structure is comb-type structure, contains polar group in main chain, contains polyethylene oxide base segment and forms space obstacle, be conducive in side chain Improve dispersibility and the dispersibility holding capacity of concrete, embody the advantages of low-dosage polymolecularity, high-collapse-retentivity.

Specific embodiment

With reference to specific embodiment, the present invention is done and supplement further, but limit the present invention never in any form.

Embodiment 1

Weigh respectively the maleic anhydride class polycarboxylic-acid diminishing mother solution of 10kg, the triethanolamine of 5kg, the methylcellulose of 5kg, The alkali metal hydroxide of 1kg, the chlorosulfonic acid of 10kg, standby.

In agitator tank, first add water, by maleic anhydride class polycarboxylic-acid diminishing mother solution, triethanolamine, methylcellulose, Alkali metal hydroxide and chlorosulfonic acid add and stir 20min so as to be dissolved into homogeneous solution, and discharging is packed.

Embodiment 2

Weigh respectively the methacrylic polycarboxylate water-reducer of 30kg, 10kg triisopropanolamine, 10kg hydroxypropyl methyl fine Dimension element, the carbonate of 5kg, the sulfur trioxide of 20kg, standby.

In agitator tank, first add water, will be fine to methacrylic polycarboxylate water-reducer, triisopropanolamine, hydroxypropyl methyl Dimension element, carbonate, carbonate and sulfur trioxide add and stir 20min so as to be dissolved into homogeneous solution, and discharging is packed.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (7)

1. a kind of polycarboxylate water-reducer it is characterised in that: include following component by mass percentage: 10～30 parts of polycarboxylic acids Water reducer mother solution, 5～10 parts of alcamine compounds, 5～10 parts of cellulose water-keeping materials, 1～5 part of catalyst, 10～20 parts of sulphurs Agent.

2. polycarboxylate water-reducer according to claim 1 it is characterised in that: described polycarboxylate superplasticizer mother liquor be acrylic acid Class, methacrylic or maleic anhydride class polycarboxylic-acid diminishing mother solution.

3. polycarboxylate water-reducer according to claim 1 it is characterised in that: described alcamine compound be triethanolamine, One of triisopropanolamine, the different hydramine of diethanol list.

4. polycarboxylate water-reducer according to claim 1 it is characterised in that: described cellulose water-keeping material be Methyl cellulose One of element, hydroxypropyl methyl cellulose, hydroxyethylmethyl-cellulose.

5. polycarboxylate water-reducer according to claim 1 it is characterised in that: described catalyst be alkali metal hydroxide, Carbonate or bicarbonate.

6. polycarboxylate water-reducer according to claim 1 it is characterised in that: described sulfonating agent be chlorosulfonic acid, concentrated sulphuric acid or Sulfur trioxide.

7. the polycarboxylate water-reducer described in claim 1 preparation method it is characterised in that:

Comprise the following steps: put into polycarboxylate superplasticizer mother liquor, alcamine compound, cellulose water conservation material in a kettle. successively Material, catalyst, sulfonating agent and tap water, stirring makes it be dissolved into homogeneous solution in 20 minutes about, obtains polycarboxylate water-reducer.