CN103449754A - 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 sandblast 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 sandblast slurry water-holding agent and preparation method thereof.

Background technology

Since two thousand seven, in Department of Commerce, firmly build under the urging of section, the Ministry of Public Security, the Ministry of Communications, Chinese Ministry of Environmental Protection, State General Administration for Quality Supervision's " about the urban time limit, forbidding the building mortar Site " notice spirit, positive tissue, the effort of process bulk cement trade management at different levels department advance, and premixing Portland 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 has realized stdn, mechanize, the automatization of computer management, metering computer and has cleaned.The logistics transportation of premixing mortar has also been realized the containerization of 60-80% gradually.

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

-----------------stores three links, and premixing mortar is " modernization " that has substantially realized height in logistics in production.

Yet, arrived the construction application process, from mortar hold-up vessel in bulk feeding out, enter the iron sheet go-cart adding the water secondary stirring, be to travel back to " modernizing " from " modernization ".And push building site to like plain trolley one car one car ant removal of home, and hang on the floor, flooring of ten layers, 20 layers, then built by laying bricks or stones, plaster with traditional manual mode, be the step that more fallen back, got back to " ancient times ".

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

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

But hardware has solved substantially, software but fails to grow with each passing hour, supporting catching up with.

The mortar product that domestic each mortar enterprise produces, its quality still is stuck on the aspect that only is suitable for the traditional-handwork plastering construction so far fails to break through.Trace it to its cause, have Three Obstacles to have to be overcome: the one,, manufacturing enterprise will, from the processing of extensive mortar product, be promoted on the development aspect become more meticulous.The strengthening quality mind, produce the high-quality mortar that is applicable to mechanical pumping, mechanically spraying, allows the higher pumping machine spraying equipment of precision not feed coarse food grain and eat smart grain; The 2nd,, science is selected the raw and auxiliary material (as Aggregate, mineral admixture, functional additive etc.) of mortar; The 3rd,, train a collection of quality is higher, skillfully acquire skill mortar pumping, spray plaster professional troop, correctly to use modernization mortar construction equipment, realize the highest goal of " alleviate workmen's labour intensity, improve the mortar operating efficiency, ensure the mortar application quality, increase the applying unit benefit ".

The existing admixture for machine sandblast slurry, all adopt hydroxypropyl methyl cellulose ether and simple composite the forming of starch ethers by the premixing mortar manufacturing enterprise that does not possess the admixture R&D capability or construction enterprises usually on the market.

When hydroxypropyl methyl cellulose ether by the volume of mortar total amount when 0.025-0.04%, starch ethers volume do not reach 90% at the water retention of 0.012-0.02%, machine sandblast slurry, 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, stops up spraying equipment (two types of minute piston pump and spiral pumps) and pipeline; When hydroxypropyl methyl cellulose ether by the volume of mortar total amount be greater than 0.04%, the starch ethers volume is greater than 0.02%, the water retention of machine sandblast slurry is while reaching 90%, 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 glutinous, the mortar ejected can not effectively adhere to, be bonded in wall (standing) face, top-down landing occurs, flow and arrive and hang (be commonly called as: spray draws, loses control of one's feelings) from above.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of machine sandblast 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 sandblast slurry water-holding agent, its one-tenth by following weight content is grouped into:

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 sandblast slurry water-holding agent of the present invention:

The mordenite powder is to be at least the meal of 200 order fineness;

The silicon ash is 5000 purpose silicon ashes.

Further improvement as machine sandblast slurry water-holding agent of the present invention: this machine sandblast 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 sandblast slurry water-holding agent simultaneously, comprises the following steps:

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

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

3), modified zeolite powder, multiviscosisty wilkinite powder and anhydrous sodium sulphate, active silica, aluminium hydroxide, silicon ash, hydroxypropyl methyl cellulose ether and lignocellulose are evenly mixed under normal temperature (10 ~ 25 ℃) until, without agglomerate, obtain machine sandblast slurry water-holding agent.

In the present invention, all compositions all can obtain by commercial mode, for example:

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

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

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

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

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

Starch ethers, can broadcast beneficial chemical industry company limited purchased from Guangzhou;

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

The present invention is from production high-quality mortar, on the aspect of applicable pumping, machine spray, thought deeply, and then a kind of machine sandblast slurry special additive of developing.

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

Add machine sandblast slurry water-holding agent of the present invention in above-mentioned conventional slurry, can make the wet mixing mortar of gained there is good thixotropic fluidity, there is again anti-hanging from above the property of excellent wall (standing) face.

Embodiment

Embodiment 1, a kind of machine sandblast 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), the mordenite powder is while being heated to 100-120 ℃ in heating container, adds Sodium dodecylbenzene sulfonate, sodium lignosulfonate, calcium lignin sulphonate and Citric Acid, usp, Anhydrous Powder uniform stirring, makes modified zeolite powder;

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

3), modified zeolite powder, multiviscosisty wilkinite powder and anhydrous sodium sulphate, active silica, aluminium hydroxide, silicon ash, hydroxypropyl methyl cellulose ether and lignocellulose are evenly mixed at normal temperatures until, without agglomerate, obtain machine sandblast slurry water-holding agent.

Embodiment 2, a kind of machine sandblast 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 sandblast 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 Examples 1, cancellation embodiment 1, make 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 Examples 2, cancellation embodiment 1, make the content of calcium lignin sulphonate into 15% by 7.5%; All the other are with embodiment 1.

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

Comparative Examples 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 Examples 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 Examples 6, cancellation starch ethers 2.5%, make the content of superfine mercerization zeolite powder into 22.5% by 20%; All the other are with embodiment 1.

Comparative Examples 7, a kind of machine sandblast slurry water-holding agent, composition and content are with embodiment 1; The preparation method makes following content into:

1), the mordenite powder is heated to 80-100 ℃ in heating container;

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

3) gains, in the gains of step 1), add step 2) and add other remaining components, evenly mix at normal temperatures until, without agglomerate, obtain machine sandblast slurry water-holding agent.

In order to verify performance of the present invention, the contriver has carried out application test to above-mentioned machine sandblast slurry water-holding agent, and (the DPM10 motar proportioning of take is example, and its composition and content are as shown in table 1, unit: the 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, add the machine sandblast slurry water-holding agent (any one in embodiment 1 ~ embodiment 3) that accounts for DPM10 motar gross weight 0.1% in the DPM10 motar, then add the water that accounts for DPM10 motar gross weight 15%; Obtain respectively wet mixing mortar experimental group 1 ~ experimental group 3.

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

3, in the DPM10 motar, add account for DPM10 motar gross weight 0.1% have on the market the water-holding agent for machine sandblast slurry now, then add the water that accounts for DPM10 motar gross weight 15%; Obtain wet mixing mortar comparative group 8.

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

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

The remarks explanation: modified version motar per ton is comprised 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 by JCJ/T105-2011 " mechanically spraying plastering construction rules " under standard environment, in experimental result in Table 2

Table 2

Three, analysis and conclusion

In this experimental result, adopt the DPM10 motar (experimental group 1 ~ experimental group 3) of machine sandblast slurry water-holding agent of the present invention 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.In 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 the performance requriements of JCJ/T105-2011 " mechanically spraying plastering construction rules " to the mortar product fully.

In sum, the present invention has fundamentally solved the mechanically spraying mortar should good pumping flow, the harsher requirement of excellent anti-hanging from above property is arranged again, by reaching the application test of six months at Changshu, Jiangsu Province (in building, the external wall construction area reaches 200,000 square metres) and the Nanchang Construction practices of 8 months (in building, the external wall construction area reaches 150,000 square metres), prove machine sandblast slurry water-holding agent of the present invention, can give and popularize application in an all-round way, really realize the mechanized of construction work motar and ground mortar 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 more than enumerate is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.

Claims (4)

1. water-holding agent is starched in the machine sandblast, it 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%.

2. water-holding agent is starched in machine sandblast according to claim 1, it is characterized in that:

The mordenite powder is to be at least the meal of 200 order fineness;

The silicon ash is 5000 purpose silicon ashes.

3. water-holding agent is starched in machine sandblast according to claim 1 and 2, it is characterized in that: this machine sandblast 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. as the preparation method according to claim 1,2 or 3 described machine sandblasts slurry water-holding agents, it is characterized in that comprising the following steps:

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

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

3), modified zeolite powder, multiviscosisty wilkinite powder and anhydrous sodium sulphate, active silica, aluminium hydroxide, silicon ash, hydroxypropyl methyl cellulose ether and lignocellulose are evenly mixed at normal temperatures until, without agglomerate, obtain machine sandblast slurry water-holding agent.