CN103449754B - Machine-blasting mortar water-retaining agent and preparation method thereof - Google Patents

Abstract

The invention discloses a machine-blasting mortar water-retaining agent and a preparation method thereof. The machine-blasting mortar water-retaining agent is composed of the following ingredients in percentage by weight: 18-22% of mordenite powder, 0.4-0.6% of sodium dodecyl benzene sulfonate, 7.2-7.8% of sodium lignosulphonate, 7.2-7.8% of calcium lignosulphonate, 4.7-5.3% of anhydrous citric acid, 2.2-2.8% of anhydrous sodium sulphate, 2.2-2.8% of plyvinyl alcohol, 2.2-2.8% of active silica, 2.2-2.8% of aluminium hydroxide, 14-16% of silica fume, 9-11% of hydroxypropyl methyl cellulose ether, 4.5-5.5% of guar gum, 14-16% of sodium bentonite, 2.2-2.8% of starch ether and 2.0-2.8% of lignocellulose. By adding the machine-blasting mortar water-retaining agent in conventional mortar, the obtained wet-mixed mortar is good in tixotropic fluidity and excellent in wall (vertical) surface sag resistance.

Description

Machine sandblasting slurry water-holding agent and preparation method thereof

Technical field

The present invention relates to a kind of mortar additive, particularly a kind of machine sandblasting slurry water-holding agent and preparation method thereof.

Background technology

Since two thousand seven, in Department of Commerce, firmly build portion, under the Ministry of Public Security, the Ministry of Communications, Chinese Ministry of Environmental Protection, State General Administration for Quality Supervision's " forbidding building mortar Site about urban time limit " notify the urging of spirit, through positive tissue, the effort propelling of bulk cement Industry regulatory bodies at different levels, premixing common cement-base for building, gypsum base mortar gradually become the gesture of popularization and application in the whole nation.

The suitability for industrialized production of premixing mortar achieve computer management, metering computer stdn, mechanize, automatization and clean.The logistics transportation of premixing mortar also achieves the containerization of 60-80% gradually.

After premixing mortar transports to construction site, be also driven in mortar dedicated storage tank by gas-moving device by mortar special transport vehicle in bulk, totally-enclosed (without the airborne dust) that achieve stored on-site is changed.

-----------------stores three link model, and premixing mortar is " modernization " that substantially achieve height in logistics in production.

But having arrived construction application process, from mortar hold-up vessel in bulk feeding out, enter iron sheet go-cart after the secondary stirring that adds water, is then travel back to " modernizing " from " modernization ".And building site is pushed to like the removal of home of plain trolley one car one car ant, hanging on the floor of ten layers, 20 layers, flooring, then carry out building by laying bricks or stones, plastering with traditional manual mode, is then the step that more fallen back, and has got back to " ancient times ".

If building mortar construction link can not realize mechanize, then the superiority of premixing mortar has no way of embodying at all, and construction site forbids that comprehensively carrying out and implementing of the national industrial policies of Site also will be had a greatly reduced quality.

Through exploration, the practice of nearly 3 years, from introducing external advanced mortar pumping equipment, mortar spraying equipment to digestion, absorption and innovation, domestic mortar equipment manufacturing also has the ability to produce mortar pumping, the spray coating mechanical of applicable China's national situation completely, lays the foundation for future architecture mortar realizes mechanize, high-level efficiency pumping and spraying.

But hardware solves substantially, software but fails to grow with each passing hour, and supportingly catches up with.

The mortar product that domestic each mortar enterprise produces, its quality be still stuck in so far be only suitable for traditional-handwork plastering construction aspect on fail breakthrough.Trace it to its cause, have Three Obstacles to have to be overcome: one is, manufacturing enterprise will from the processing of extensive mortar product, is promoted in the development aspect that becomes more meticulous.Strengthening quality mind, produce the high-quality mortar of applicable mechanical pumping, mechanically spraying, and the pumping machine spraying equipment making precision higher is not fed coarse food grain and eaten smart grain; Two are, science selects the raw and auxiliary material (as Aggregate, mineral admixture, functional additive etc.) of mortar; Three are, train that a collection of quality is higher, the mortar pumping that skillfully acquires skill, spray plaster professional troop, correctly to use modernization mortar construction equipment, realize the highest goal of " alleviate workmen's labour intensity, improve mortar operating efficiency, ensure mortar application quality, increase applying unit benefit ".

The existing admixture for machine sandblasting slurry on the market, usually all by not possessing the premixing mortar manufacturing enterprise of admixture R&D capability or construction enterprises adopt hydroxypropyl methyl cellulose ether and starch ethers is simply composite forms.

When hydroxypropyl methyl cellulose ether does not reach 90% at 0.025-0.04%, starch ethers volume at the water retention of 0.012-0.02%, machine sandblasting slurry by the volume of mortar total amount, pump into slurry consistency and be less than 80mm, the thixotropic fluidity of wet mixing mortar is little, mortar easily produces bleeding, layering and segregation phenomenon, blocking spraying equipment (point piston pump and spiral pump two type) and pipeline; When hydroxypropyl methyl cellulose ether be greater than 0.04% by the volume of mortar total amount, starch ethers volume is greater than 0.02%, the water retention of machine sandblasting slurry reaches 90% time, pump into slurry consistency and be greater than 120mm, the thixotropic fluidity of wet mixing mortar is large, mortar is not only thick but also stick, the mortar ejected can not effectively adhere to, (standing) face that is bonded in wall, top-down landing occurs, flowing and arriving hangs from above (being commonly called as: spray draws, loses control of one's feelings).

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of machine sandblasting slurry water-holding agent and preparation method thereof.

In order to solve the problems of the technologies described above, the invention provides a kind of machine sandblasting slurry water-holding agent, it is grouped into by the one-tenth of following weight content:

Mordenite powder 18 ~ 22%, Sodium dodecylbenzene sulfonate 0.4 ~ 0.6%, sodium lignosulfonate 7.2 ~ 7.8%, calcium lignin sulphonate 7.2 ~ 7.8%, Citric Acid, usp, Anhydrous Powder 4.7 ~ 5.3%, anhydrous sodium sulphate 2.2 ~ 2.8%, polyvinyl alcohol 2.2 ~ 2.8%, active silica 2.2 ~ 2.8%, aluminium hydroxide 2.2 ~ 2.8%, silicon ash 14 ~ 16%, hydroxypropyl methyl cellulose ether 9 ~ 11%, guar gum 4.5 ~ 5.5%, sodium bentonite 14 ~ 16%, starch ethers 2.2 ~ 2.8% and lignocellulose 2.0 ~ 2.8%.

Improvement as machine sandblasting slurry water-holding agent of the present invention:

Mordenite powder is be at least the meal of 200 order fineness;

Silicon ash is 5000 object silicon ashes.

Further improvement as machine sandblasting slurry water-holding agent of the present invention: this machine sandblasting slurry water-holding agent is grouped into by the one-tenth of following weight content:

Mordenite powder 20%, Sodium dodecylbenzene sulfonate 0.5%, sodium lignosulfonate 7.5%, calcium lignin sulphonate 7.5%, Citric Acid, usp, Anhydrous Powder 5%, anhydrous sodium sulphate 2.5%, polyvinyl alcohol 2.5%, active silica 2.5%, aluminium hydroxide 2.5%, silicon ash 15%, hydroxypropyl methyl cellulose ether 10%, guar gum 5%, sodium bentonite 15%, starch ethers 2.5% and lignocellulose 2.0%.

The present invention also provides the preparation method of above-mentioned machine sandblasting slurry water-holding agent simultaneously, comprises the following steps:

1), after mordenite powder is heated to 100-120 DEG C in container, Sodium dodecylbenzene sulfonate, sodium lignosulfonate, calcium lignin sulphonate and Citric Acid, usp, Anhydrous Powder uniform stirring is added, obtained modified zeolite powder;

2), after sodium bentonite is heated to 80-100 DEG C in container, add polyvinyl alcohol, guar gum, starch ethers stir, the multiviscosisty wilkinite powder of obtained graft modification;

3), by modified zeolite powder, multiviscosisty wilkinite powder and anhydrous sodium sulphate, active silica, aluminium hydroxide, silicon ash, hydroxypropyl methyl cellulose ether and lignocellulose under normal temperature (10 ~ 25 DEG C), carry out Homogeneous phase mixing until without agglomerate, obtain machine sandblasting slurry water-holding agent.

In the present invention, all compositions all obtain by commercial mode, such as:

The above mordenite powder of 200 order, can purchased from the prebiotic livable building materials Science and Technology Ltd. in Jinhua;

Polyvinyl alcohol, can purchased from Shanghai Jin Shu resin company limited;

Active silica (white carbon black), can purchased from Hangzhou Genghua Chemical Engineering Co., Ltd;

Silicon ash is also SILICA FUME or claims cohesion silicon ash, and English is Microsilica or Silica fume; Can purchased from Guizhou ferroalloy materials company limited;

Sodium bentonite, can purchased from Linan gravitation wilkinite company limited;

Starch ethers, can purchased from Guangzhou Bo Yi Chemical Co., Ltd.;

Lignocellulose, can purchased from the brilliant building materials company limited in Changchun.

The present invention is from production high-quality mortar, and the aspect being suitable for pumping, machine spray is thought deeply, and then a kind of machine sandblasting slurry special additive developed.

Conventional motar (for DPM10), be made up of the PO42.5 cement of 150kg, the second class powered coal ash (or mineral admixture) of 60kg, the 2.6 fineness modulus river sands of 790kg or Machine-made Sand, water retention is lower than 60%, denseness is less than 50mm, according to JCJ/T105-2011 " mechanically spraying plastering construction code " requirement, be not suitable for mechanically spraying completely and traditional-handwork can only be used for and plaster and whitewash.

In above-mentioned conventional slurry, add machine sandblasting of the present invention slurry water-holding agent, the wet mixing mortar of gained can be made namely to have good thixotropic fluidity, there is again anti-hanging from above the property in excellent wall (standing) face.

Embodiment

Embodiment 1, a kind of machine sandblasting slurry water-holding agent are grouped into by the one-tenth of following weight content:

Mordenite powder (200 order) 20%, Sodium dodecylbenzene sulfonate 0.5%, sodium lignosulfonate 7.5%, calcium lignin sulphonate 7.5%, Citric Acid, usp, Anhydrous Powder 5%, anhydrous sodium sulphate 2.5%, polyvinyl alcohol 2.5%, active silica 2.5%, aluminium hydroxide 2.5%, silicon ash (5000 order) 15%, hydroxypropyl methyl cellulose ether 10%, guar gum 5%, sodium bentonite 15%, starch ethers 2.5% and lignocellulose 2.0%.

Concrete preparation method is as follows:

1), mordenite powder is when being heated to 100-120 DEG C in heating container, adds Sodium dodecylbenzene sulfonate, sodium lignosulfonate, calcium lignin sulphonate and Citric Acid, usp, Anhydrous Powder uniform stirring, obtained modified zeolite powder;

2), sodium bentonite in time being heated to 80-100 DEG C, adds polyvinyl alcohol in heating container, guar gum, starch ethers stir, the multiviscosisty wilkinite powder of obtained graft modification;

3), by modified zeolite powder, multiviscosisty wilkinite powder and anhydrous sodium sulphate, active silica, aluminium hydroxide, silicon ash, hydroxypropyl methyl cellulose ether and lignocellulose carry out Homogeneous phase mixing until without agglomerate at normal temperatures, obtain machine sandblasting slurry water-holding agent.

Embodiment 2, a kind of machine sandblasting slurry water-holding agent are grouped into by the one-tenth of following weight content:

Mordenite powder (200 order) 21.8%, Sodium dodecylbenzene sulfonate 0.4%, sodium lignosulfonate 7.8%, calcium lignin sulphonate 7.2%, Citric Acid, usp, Anhydrous Powder 5.3%, anhydrous sodium sulphate 2.2%, polyvinyl alcohol 2.2%, active silica 2.8%, aluminium hydroxide 2.2%, silicon ash (5000 order) 14%, hydroxypropyl methyl cellulose ether 9%, guar gum 4.5%, sodium bentonite 15.6%, starch ethers 2.8% and lignocellulose 2.2%.

Its preparation method is equal to embodiment 1.

Embodiment 3, a kind of machine sandblasting slurry water-holding agent are grouped into by the one-tenth of following weight content:

Mordenite powder (200 order) 18%, Sodium dodecylbenzene sulfonate 0.6%, sodium lignosulfonate 7.2%, calcium lignin sulphonate 7.8%, Citric Acid, usp, Anhydrous Powder 4.7%, anhydrous sodium sulphate 2.8%, polyvinyl alcohol 2.8%, active silica 2.2%, aluminium hydroxide 2.8%, silicon ash (5000 order) 15.8%, hydroxypropyl methyl cellulose ether 10.8%, guar gum 5.5%, sodium bentonite 14%, starch ethers 2.2% and lignocellulose 2.8%.

Its preparation method is equal to embodiment 1.

The use of the calcium lignin sulphonate 7.5% in comparative example 1, cancellation embodiment 1, makes the content of sodium lignosulfonate into 15% by 7.5%; All the other are with embodiment 1.

The use of the sodium lignosulfonate 7.5% in comparative example 2, cancellation embodiment 1, makes the content of calcium lignin sulphonate into 15% by 7.5%; All the other are with embodiment 1.

The use of comparative example 3, cancellation active silica 2.5%, makes the content of superfine mercerization zeolite powder into 22.5% by 20%; All the other are with embodiment 1.

Comparative example 4, make the content of guar gum into 8% by 5%, make the content of superfine mercerization zeolite powder into 18% by 20%, make the content of sodium bentonite into 14% by 15%; All the other are with embodiment 1.

Comparative example 5, make the content of guar gum into 2% by 5%, make the content of superfine mercerization zeolite powder into 22% by 20%, make the content of sodium bentonite into 16% by 15%; All the other are with embodiment 1.

The use of comparative example 6, cancellation starch ethers 2.5%, makes the content of superfine mercerization zeolite powder into 22.5% by 20%; All the other are with embodiment 1.

Comparative example 7, a kind of machine sandblasting slurry water-holding agent, composition and content are with embodiment 1; Preparation method makes following content into:

1), mordenite powder is heated to 80-100 DEG C in heating container;

2), sodium bentonite is heated to 100-120 DEG C in heating container;

3), in the gains of step 1) add step 2) gains and add other remaining components, carry out Homogeneous phase mixing until without agglomerate at normal temperatures, obtain machine sandblasting slurry water-holding agent.

In order to verify performance of the present invention, contriver to above-mentioned machine sandblasting slurry water-holding agent carried out application test (for DPM10 motar proportioning, its composition and content as shown in table 1, unit: kg/ ton).

Table 1

Material	Po42.5 cement	Second class powered coal ash	2.6 fineness modulus river sand
				Consumption	150	60	790

Specific as follows:

1, in DPM10 motar, add machine sandblasting slurry water-holding agent (in embodiment 1 ~ embodiment 3 any one) accounting for DPM10 motar gross weight 0.1%, then add the water accounting for DPM10 motar gross weight 15%; Obtain wet mixing mortar experimental group 1 ~ experimental group 3 respectively.

2, in DPM10 motar, add machine sandblasting slurry water-holding agent (in comparative example 1 ~ comparative example 7 any one) accounting for DPM10 motar gross weight 0.1%, then add the water accounting for DPM10 motar gross weight 15%; Obtain wet mixing mortar comparative group 1 ~ comparative group 7 respectively.

3, in DPM10 motar, add the existing on the market water-holding agent for machine sandblasting slurry accounting for DPM10 motar gross weight 0.1%, then add the water accounting for DPM10 motar gross weight 15%; Obtain wet mixing mortar comparative group 8.

4, in DPM10 motar, add the water accounting for DPM10 motar gross weight 15%, obtain blank comparative group 1.

5, add the water accounting for modified version motar gross weight 15.2% at modified version motar, obtain blank comparative group 2.

Remarks illustrate: modified version motar per ton, are made up of the Po42.5 cement of 140 kg, the second class powered coal ash of 80 kg, the 2.6 fineness modulus river sand of 780 kg.

Experiment is undertaken, in experimental result in table 2 by JCJ/T105-2011 " mechanically spraying plastering construction code " under standard environment

Table 2

Three, analysis and conclusion

In this experimental result, adopt machine sandblasting of the present invention to starch the DPM10 motar (experimental group 1 ~ experimental group 3) of water-holding agent preparation, its denseness, unit weight, 2h denseness rate of loss, water retention, 28d ultimate compression strength are all higher than GB/T25181 " premixing mortar " standard-required.On wet mixing mortar thixotropic fluidity (pumping), spraying, anti-hanging from above the property of facade (metope) is well, hardened mortar resistance to cleavage increase rate reaches 60%, property indices, higher than GB, can meet JCJ/T105-2011 " the mechanically spraying plastering construction code " performance requriements to mortar product completely.

In sum, the present invention fundamentally solves mechanically spraying mortar should good pumping flow, there is the comparatively rigors of excellent anti-hanging from above property again, by reaching the application test of six months at Changshu, Jiangsu Province (in building, external wall construction area reaches 200,000 square metres) and the Nanchang Construction practices of 8 months (in building, external wall construction area reaches 150,000 square metres), prove machine sandblasting of the present invention slurry water-holding agent, can give and popularize application in an all-round way, the mechanized of construction work motar and ground mortar is really realized with power-assisted premixing mortar industry, be conducive to the penetration and promotion comprehensively fast of premixing mortar.

Finally, it is also to be noted that what enumerate above is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.

Claims (4)

1. machine sandblasting slurry water-holding agent, is characterized in that being grouped into by the one-tenth of following weight content:

Mordenite powder 18 ~ 22%, Sodium dodecylbenzene sulfonate 0.4 ~ 0.6%, sodium lignosulfonate 7.2 ~ 7.8%, calcium lignin sulphonate 7.2 ~ 7.8%, Citric Acid, usp, Anhydrous Powder 4.7 ~ 5.3%, anhydrous sodium sulphate 2.2 ~ 2.8%, polyvinyl alcohol 2.2 ~ 2.8%, active silica 2.2 ~ 2.8%, aluminium hydroxide 2.2 ~ 2.8%, silicon ash 14 ~ 16%, hydroxypropyl methyl cellulose ether 9 ~ 11%, guar gum 4.5 ~ 5.5%, sodium bentonite 14 ~ 16%, starch ethers 2.2 ~ 2.8% and lignocellulose 2.0 ~ 2.8%;

Mordenite powder is be at least the meal of 200 order fineness.

2. machine sandblasting slurry water-holding agent according to claim 1, is characterized in that:

Silicon ash is 5000 object silicon ashes.

3. machine sandblasting slurry water-holding agent according to claim 1 and 2, is characterized in that: this machine sandblasting slurry water-holding agent is grouped into by the one-tenth of following weight content:

Mordenite powder 20%, Sodium dodecylbenzene sulfonate 0.5%, sodium lignosulfonate 7.5%, calcium lignin sulphonate 7.5%, Citric Acid, usp, Anhydrous Powder 5%, anhydrous sodium sulphate 2.5%, polyvinyl alcohol 2.5%, active silica 2.5%, aluminium hydroxide 2.5%, silicon ash 15%, hydroxypropyl methyl cellulose ether 10%, guar gum 5%, sodium bentonite 15%, starch ethers 2.5% and lignocellulose 2.0%.

4. the preparation method of the machine sandblasting slurry water-holding agent according to claim 1,2 or 3, is characterized in that comprising the following steps:

1), after mordenite powder is heated to 100-120 DEG C in container, Sodium dodecylbenzene sulfonate, sodium lignosulfonate, calcium lignin sulphonate and Citric Acid, usp, Anhydrous Powder uniform stirring is added, obtained modified zeolite powder;

2), after sodium bentonite is heated to 80-100 DEG C in container, add polyvinyl alcohol, guar gum, starch ethers stir, the multiviscosisty wilkinite powder of obtained graft modification;

3), by modified zeolite powder, multiviscosisty wilkinite powder and anhydrous sodium sulphate, active silica, aluminium hydroxide, silicon ash, hydroxypropyl methyl cellulose ether and lignocellulose carry out Homogeneous phase mixing until without agglomerate at normal temperatures, obtain machine sandblasting slurry water-holding agent.