CN105621990A - High-tenacity crack-resistant grouting cement mortar and preparing method thereof - Google Patents
High-tenacity crack-resistant grouting cement mortar and preparing method thereof Download PDFInfo
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- CN105621990A CN105621990A CN201511010951.8A CN201511010951A CN105621990A CN 105621990 A CN105621990 A CN 105621990A CN 201511010951 A CN201511010951 A CN 201511010951A CN 105621990 A CN105621990 A CN 105621990A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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Abstract
The invention belongs to the field of cement mortar preparing, and particularly relates to high-tenacity crack-resistant grouting cement mortar and a preparing method thereof. The mortar comprises 80-100 parts of cement, 120-180 parts of 50-200-mesh silver sand, 20-50 parts of water, 5-10 parts of polyurethane solutions, 5-10 parts of epoxy resin emulsion, 10-15 parts of toughening composite materials, 1.5-6 parts of early strength agent, 2-9 parts of methacrylic acid, 2-6 parts of calcium formate, 2-8 parts of neopentyl glycol, 0.2-0.8 part of sodium dodecyl benzene sulfonate and 0.9-2.4 parts of water reducing agent. As toughening composite materials are added into the cement mortar, whole concrete has good tenacity, good isotropy and good fatigue resistance, the crack resistance of the grouting mortar is better facilitated, tenacity is improved, and the later-period maintenance cost of engineering is reduced.
Description
Technical field
The invention belongs to the preparation field of sand-cement slurry, it is specifically related to a kind of high tenacity Grouting Cement mortar and its preparation method.
Background technology
Ordinary mortar because of tensile pressure ratio low, greatly dry-shrinkage deformed, impermeability, splitting resistance, corrosion-resistant, density is big, and its use range is very restricted. Along with the development of industry, the performance of mortar to be put forward further, the performance of consolidating material will be improved, therefore polymer mortar has occurred. Utilizing polymkeric substance that sand-cement slurry carries out modification makes it when keeping cement original inorganic materials ultimate compression strength, folding strength, ageing-resistant advantage, add the feature that organic materials cohesive force is big, deformability good, stopping property is strong, thus the cohesive force of sand-cement slurry, frost resistance and impervious power are all enhanced. The Grouting Cement mortar that current Application comparison is many mainly contains two kinds: one is epoxy resin Grouting Cement mortar, another is urethane Grouting Cement mortar, but adopt single epoxy resin its toughness of Grouting Cement mortar poor, adopt single urethane its intensity of Grouting Cement mortar inadequate again, it is determined that a kind of high performance Grouting Cement mortar is construction work problem in the urgent need to address. Epoxy resin has many advantages, as low in the chemical stability of excellence, erosion resistance, electrical apparatus insulation and shrinking percentage etc. But due to cross-linking density height after single epoxy resin cure, in tridimensional network, there is internal stress big, matter is crisp, poor impact resistance, it is easy to the shortcomings such as cracking, it is difficult to meets concrete and increases tough engineering technical requirements so that it is application is subject to certain restrictions.
For a long time, epoxy resin carries out toughening modifying is an important research contents always. urethane is the polymer of a class excellent property, has high impact strength and excellent resistance to low temperature, both can be made to have complementary advantages with polyurethane modified epoxy resin. the concrete of the present invention increases tough matrix material, adopt the improved silica nanotube increasing tough usefulness excellence, styrene-butadiene-styrene block copolymer and wood powder fiber, by the surface modification effect of solubilizing agent and silane coupling agent, three kinds of toughening materials are effectively combined, form the composite toughening system of a kind of uniqueness, prepare the matrix material fully to disperse in concrete, effectively play the effect of material coordination plasticizing, give concrete entirety and there is good toughness, isotropy and fatigue resistance, it it is a kind of high performance concrete toughening material, advantageously in the splitting resistance of grouting mortar, increase toughness, reduce engineering later maintenance expense.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, it is provided that a kind of high tenacity Grouting Cement mortar and its preparation method. By adding toughening composition in sand-cement slurry, give concrete entirety and there is good toughness, isotropy and fatigue resistance, advantageously in the splitting resistance of grouting mortar, increase toughness, reduce engineering later maintenance expense.
For achieving the above object, the present invention adopts following technical scheme:
A kind of high tenacity cracking resistance Grouting Cement mortar, by weight, following component is comprised: cement 80-100 part, 50��200 order fine sand 120-180 parts, water 20-50 part, polyurethane solution 5-10 part, epoxy resin latex 5-10 part, toughening composition 10-15 part, hardening accelerator 1.5-6 part, methacrylic acid 2-9 part, calcium formiate 2-6 part, neopentyl glycol 2-8 part, Sodium dodecylbenzene sulfonate 0.2-0.8 part, water reducer 0.9-2.4 part; Described toughening composition, by weight, raw material consists of: improved silica nanotube 1.2-1.8 part, styrene-butadiene-styrene block copolymer 22-28 part, activation wood powder fiber 46-50 part, silane coupling agent 3.5-5 part, solubilizing agent 3.0-3.5 part, filler 4-6 part and water 180-220 part.
The preparation method of described improved silica nanotube comprises the following steps:
(1) each in two identical 5L nylon tanks load Stainless Steel Ball that 30 diameters are 10mm and 45 diameters are the Stainless Steel Ball of 5mm, then add 0.9kg silica nanometer pipe respectively, then drip respectively and add 90ml dehydrated alcohol, and seal with nylon lid; Put into ball mill by symmetrical for two ball grinders, rotating speed be 400rpm and every 30 minutes automatically conversion sense of rotation when ball-milling processing 48h;
(2) get step (1) process after silica nanometer pipe joins that pH is 8, in the 20wt% polysorbas20 aqueous solution, ultrasonic 18h, filters, after washing, vacuum-drying 15h at 55-57 DEG C;
(3) get the silica nanometer pipe after step (3) process to stir 48 hours in 40L, 35wt% aqueous sodium hydroxide solution, filter, after powder is cleaned with pure water, vacuum-drying 18h at 58-60 DEG C;
(4) getting the silica nanometer pipe after step (3) process to stir 72 hours in 35L, 20wt% hydrogen peroxide, filter, after being cleaned with pure water by powder, vacuum-drying 48h at 50-52 DEG C, obtains the silica nanometer pipe of 1.52-1.60kg surface band hydroxyl;
(5) get the silica nanometer pipe 1.5kg of surface band hydroxyl prepared by step (4), join in 40L methylene dichloride, under nitrogen protection after room temperature supersound process 3h, add 110ml boron trifluoride-ether complex and stirring at room temperature 3h; Again under-13 ~-15 DEG C and agitation condition, slowly dripping and add 570ml3-methyl-3-hydroxymethyl-oxetane, it is 6h that control droplet adds the time; Continue to stir 1h in-11 ~-13 DEG C after dropwising; Then 550ml anhydrous methanol is added, by the rotating speed centrifugal treating 20-25min of 5500-6000rpm, Separation and Recovery solvent, powder is cleaned through anhydrous methanol and at room temperature after vacuum-drying 24h, is obtained 1.77-1.86kg improved silica nanotube;
Silica nanometer pipe purity described in step (1) > 96%, length is 2-4 ��m, and caliber is 150-300nm, specific surface area > 500m2/g��
The preparation method of described activation wood powder fiber is: by wood powder fiber 45kg under room temperature, after stirring 36 hours, filters, wash wood powder fiber to neutrality with water in the aqueous sodium hydroxide solution of 136L20wt%; Then, wood powder fiber is stirred 30 hours in 90L18wt% hydrogen peroxide solution, filters and wash; Wood powder fiber is joined pH is 8 again, ultrasonic 3h in the 25wt% polysorbas20 aqueous solution, stir 18 hours after filter, after washing, stand-by after vacuum-drying 24h at 60-62 DEG C.
The preparation method of described toughening composition is:
(1) improved silica nanotube, styrene-butadiene-styrene block copolymer, activation wood powder fiber, silane coupling agent, solubilizing agent, filler and water is got for subsequent use;
(2) at room temperature silane coupling agent is added to the water, it is stirred to and dissolves completely, the obtained modified silane coupler aqueous solution; Then improved silica nanotube and activation wood powder fiber are joined in the silane coupling agent aqueous solution, after ultrasonic 3h, stir 5h, it is warming up to 59-61 DEG C again and stirs 36h, filter, powder is pressed the rotating speed centrifugal treating 35min of 500r/min, then by stand-by for powder vacuum-drying 30 hours at 53-55 DEG C;
(3) powder filler, styrene-butadiene-styrene block copolymer and step (2) made loads in high-speed mixer, after disperseing 3-4h under 350-400r/min rotating speed, it is warming up to 105-110 DEG C, add solubilizing agent again, after disperseing 18-22min under 530-600r/min rotating speed, put into the cooling of cold mixed pot, when temperature drops to 48-50 DEG C, put material, obtain just batch mixing;
(4) extrude after the first batch mixing that step (3) prepares is placed in the mixing 1-1.5h of twin screw extruder that temperature is 175-190 DEG C, rotating speed is 70-85r/min, obtain mixing materials;
(5) mixing materials pulverization process step (4) prepared, obtaining granularity is that 90-200 object concrete increases tough matrix material.
Described hardening accelerator is one or more in villaumite, vitriol, nitrate, nitrite, trolamine, acetic acid, acetate; Described water reducer is one or more in naphthalenesulfonate formaldehyde condensation compound and sulfonated melamine compound condenses.
Prepare a method for high tenacity cracking resistance Grouting Cement mortar as above, comprise the following steps:
(1) cement and fine sand are mixed formation dry mash, then add water and stir evenly;
(2) adding in the mixture that step (1) is formed successively by hardening accelerator and water reducer, stir evenly, churning time is respectively 5��8 minutes;
(3) other material is added in the obtained mixture of step (2) simultaneously, stir fast evenly, be then pumped into by pressure pump and specify engineering position.
The leading indicator of described styrene-butadiene-styrene block copolymer: density: 1.01g/cm3; Melt flow rate (MFR): 5.0g/10min(200 DEG C, 5kg); Rockwell hardness: 10; Flexural strength: 21MPa; Tensile strength: 18MPa; Elongation at break: 250%; Heat-drawn wire: 60 DEG C (1.8Mpa, unannealed);
The particle diameter of described wood powder fiber is 100-230 order;
Described solubilizing agent is maleic anhydride graft copolymer, it is preferable that U.S. KratonSEBSFG1901X maleic anhydride graft terpolymer, its leading indicator: maleic anhydride grafts: 1.5%; Density: 0.91g/cm3; Melt index: 22g/10min; Viscosity: cps5000(25 DEG C, 25% toluene solution); Elongation at break: 500%;
Described filler is acicular wollastonite, and the particle diameter of filler is 1-25 ��m;
Described coupling agent is commercially available A-171 or the A-151 silane coupling agent in union carbide corporation of the U.S.;
Described hydrogen peroxide is commercial concentration is the aqueous hydrogen peroxide solution of 40%;
Described polysorbas20 is commercially available pale yellow viscous liquid, its main physical and chemical indexes: actives: 98-99%; Saponification value (KOHmg/g): 40-50; Hydroxyl value (KOHmg/g): 80-108; HLB value: 16.7; Acid number (KOHmg/g) :��1.0; Moisture content (%) :��1.0.
Toughening material of the present invention increases tough mechanism and is:
The concrete of the present invention increases tough matrix material and have employed improved silica nanotube first. Silica nanometer pipe has the two-dimensional nano pipe structure of excellent in mechanical performance, is a kind of desirable concrete toughening material. Due to silica nanometer pipe specific surface energy height, specific surface area is big, easily reunite and form block aggregate and lose the mechanical property of its excellence, silica nanometer pipe is carried out chemical modification by the present invention further, by in its surface construction hyper-branched polymer structure, significantly strengthening the volume excluding effect between nanotube. This kind of improved silica nanotube fully can disperse in concrete system, plays the synergy of different toughening material better. Meanwhile, the tough matrix material of the increasing of the present invention have employed that cost is lower, wide material sources, is easy to processing and eco-friendly wood powder fiber. Containing the hydroxyl reactive group that a large amount of wetting ability is strong in the wood powder fiber molecule chain of chemical activation process, can with the hydrated product in concrete formation process, as the materials such as gel of calcium silicate, ettringite and calcium hydroxide form reactive force between hydrogen bond equimolecular, thus improve concrete microstress strain property.
The useful effect of the present invention is:
1) concrete of the present invention increases tough matrix material by the surface modification effect of solubilizing agent and silane coupling agent, first the improved silica nanotube of the tough usefulness excellence of increasing, styrene-butadiene-styrene block copolymer and these three kinds of materials of wood powder fiber are effectively combined, define the composite toughening system of a kind of uniqueness, prepare the matrix material fully to disperse in concrete, effectively play the effect of material coordination plasticizing, give concrete entirety and there is good toughness, isotropy and fatigue resistance, be a kind of high performance concrete toughening material;
2) sand-cement slurry of the present invention has very high intensity after being in the milk, it is possible to obtain the intensity of more than 40MPa, good toughness and splitting resistance, reduces engineering later maintenance expense.
Embodiment
The present invention's the following example illustrates the present invention further, but protection scope of the present invention is not limited to the following example.
Described epoxy resin latex and polyurethane solution are prepared containing the epoxy resin roughening emulsion of modified bamboo fiber and the preparation method of polyurethane toughened emulsion by patent (CN104150843A) " modified bamboo fiber/polymer thing compound high tenacity concrete and its preparation method ".
Embodiment 1
A kind of high tenacity cracking resistance Grouting Cement mortar, by weight, following component is comprised: cement 80 parts, 100 order fine sand 160 parts, 35 parts, water, polyurethane solution 8 parts, epoxy resin latex 8 parts, toughening composition 15 parts, hardening accelerator 3 parts, methacrylic acid 6 parts, calcium formiate 4 parts, neopentyl glycol 5 parts, Sodium dodecylbenzene sulfonate 0.5 part, water reducer 2 parts; Described toughening composition, by weight, raw material consists of: improved silica nanotube 1.5 parts, styrene-butadiene-styrene block copolymer 25 parts, activation wood powder fiber 48 parts, silane coupling agent 4 parts, solubilizing agent 3.2 parts, filler 5 parts and 200 parts, water.
The preparation method of described improved silica nanotube comprises the following steps:
(1) each in two identical 5L nylon tanks load Stainless Steel Ball that 30 diameters are 10mm and 45 diameters are the Stainless Steel Ball of 5mm, then add 0.9kg silica nanometer pipe respectively, then drip respectively and add 90ml dehydrated alcohol, and seal with nylon lid; Put into ball mill by symmetrical for two ball grinders, rotating speed be 400rpm and every 30 minutes automatically conversion sense of rotation when ball-milling processing 48h;
(2) get step (1) process after silica nanometer pipe joins that pH is 8, in the 20wt% polysorbas20 aqueous solution, ultrasonic 18h, filters, after washing, vacuum-drying 15h at 56 DEG C;
(3) get the silica nanometer pipe after step (3) process to stir 48 hours in 40L, 35wt% aqueous sodium hydroxide solution, filter, after powder is cleaned with pure water, vacuum-drying 18h at 59 DEG C;
(4) getting the silica nanometer pipe after step (3) process to stir 72 hours in 35L, 20wt% hydrogen peroxide, filter, after being cleaned with pure water by powder, vacuum-drying 48h at 51 DEG C, obtains the silica nanometer pipe of 1.56kg surface band hydroxyl;
(5) get the silica nanometer pipe 1.5kg of surface band hydroxyl prepared by step (4), join in 40L methylene dichloride, under nitrogen protection after room temperature supersound process 3h, add 110ml boron trifluoride-ether complex and stirring at room temperature 3h; Again under-14 DEG C and agitation condition, slowly dripping and add 570ml3-methyl-3-hydroxymethyl-oxetane, it is 6h that control droplet adds the time; Continue to stir 1h in-12 DEG C after dropwising; Then 550ml anhydrous methanol is added, by the rotating speed centrifugal treating 22min of 5800rpm, Separation and Recovery solvent, powder is cleaned through anhydrous methanol and at room temperature after vacuum-drying 24h, is obtained 1.80kg improved silica nanotube;
The preparation method of described activation wood powder fiber is: by wood powder fiber 45kg under room temperature, after stirring 36 hours, filters, wash wood powder fiber to neutrality with water in the aqueous sodium hydroxide solution of 136L20wt%; Then, wood powder fiber is stirred 30 hours in 90L18wt% hydrogen peroxide solution, filters and wash; Wood powder fiber is joined pH is 8 again, ultrasonic 3h in the 25wt% polysorbas20 aqueous solution, stir 18 hours after filter, after washing, stand-by after vacuum-drying 24h at 61 DEG C.
The preparation method of described toughening composition is:
(1) improved silica nanotube, styrene-butadiene-styrene block copolymer, activation wood powder fiber, silane coupling agent, solubilizing agent, filler and water is got for subsequent use;
(2) at room temperature silane coupling agent is added to the water, it is stirred to and dissolves completely, the obtained modified silane coupler aqueous solution; Then improved silica nanotube and activation wood powder fiber are joined in the silane coupling agent aqueous solution, after ultrasonic 3h, stir 5h, it is warming up to 60 DEG C again and stirs 36h, filter, powder is pressed the rotating speed centrifugal treating 35min of 500r/min, then by stand-by for powder vacuum-drying 30 hours at 54 DEG C;
(3) powder filler, styrene-butadiene-styrene block copolymer and step (2) made loads in high-speed mixer, after disperseing 3.5h under 370r/min rotating speed, it is warming up to 108 DEG C, add solubilizing agent again, after disperseing 20min under 550r/min rotating speed, put into the cooling of cold mixed pot, when temperature drops to 49 DEG C, put material, obtain just batch mixing;
(4) extrude after the first batch mixing that step (3) prepares is placed in the mixing 1.2h of twin screw extruder that temperature is 180 DEG C, rotating speed is 80r/min, obtain mixing materials;
(5) mixing materials pulverization process step (4) prepared, obtaining granularity is that 100 object concrete increase tough matrix material.
Prepare a method for high tenacity cracking resistance Grouting Cement mortar as above, comprise the following steps:
(1) cement and fine sand are mixed formation dry mash, then add water and stir evenly;
(2) adding in the mixture that step (1) is formed successively by hardening accelerator and water reducer, stir evenly, churning time is respectively 7 minutes;
(3) other material is added in the obtained mixture of step (2) simultaneously, stir fast evenly, be then pumped into by pressure pump and specify engineering position.
The present embodiment records the ultimate compression strength of 28 days urethane sand, folding strength, cohesive strength and water-intake rate and shrinking percentage is 58.26MPa, 19.4MPa, 4.3MPa, 0.23% and 0.27% respectively.
Embodiment 2
A kind of high tenacity cracking resistance Grouting Cement mortar, by weight, following component is comprised: cement 80 parts, 200 order fine sand 180 parts, 20 parts, water, polyurethane solution 10 parts, epoxy resin latex 5 parts, toughening composition 15 parts, hardening accelerator 1.5 parts, methacrylic acid 9 parts, calcium formiate 2 parts, neopentyl glycol 8 parts, Sodium dodecylbenzene sulfonate 0.2 part, water reducer 2.4 parts; Described toughening composition, by weight, raw material consists of: improved silica nanotube 1.2 parts, styrene-butadiene-styrene block copolymer 28 parts, activation wood powder fiber 46 parts, silane coupling agent 5 parts, solubilizing agent 3.0 parts, filler 6 parts and 180 parts, water.
The preparation method of described improved silica nanotube comprises the following steps:
(1) each in two identical 5L nylon tanks load Stainless Steel Ball that 30 diameters are 10mm and 45 diameters are the Stainless Steel Ball of 5mm, then add 0.9kg silica nanometer pipe respectively, then drip respectively and add 90ml dehydrated alcohol, and seal with nylon lid; Put into ball mill by symmetrical for two ball grinders, rotating speed be 400rpm and every 30 minutes automatically conversion sense of rotation when ball-milling processing 48h;
(2) get step (1) process after silica nanometer pipe joins that pH is 8, in the 20wt% polysorbas20 aqueous solution, ultrasonic 18h, filters, after washing, vacuum-drying 15h at 55 DEG C;
(3) get the silica nanometer pipe after step (3) process to stir 48 hours in 40L, 35wt% aqueous sodium hydroxide solution, filter, after powder is cleaned with pure water, vacuum-drying 18h at 58 DEG C;
(4) getting the silica nanometer pipe after step (3) process to stir 72 hours in 35L, 20wt% hydrogen peroxide, filter, after being cleaned with pure water by powder, vacuum-drying 48h at 50 DEG C, obtains the silica nanometer pipe of 1.60kg surface band hydroxyl;
(5) get the silica nanometer pipe 1.5kg of surface band hydroxyl prepared by step (4), join in 40L methylene dichloride, under nitrogen protection after room temperature supersound process 3h, add 110ml boron trifluoride-ether complex and stirring at room temperature 3h; Again under-13 DEG C and agitation condition, slowly dripping and add 570ml3-methyl-3-hydroxymethyl-oxetane, it is 6h that control droplet adds the time; Continue to stir 1h in-11 DEG C after dropwising; Then 550ml anhydrous methanol is added, by the rotating speed centrifugal treating 25min of 5500rpm, Separation and Recovery solvent, powder is cleaned through anhydrous methanol and at room temperature after vacuum-drying 24h, is obtained 1.86kg improved silica nanotube;
The preparation method of described activation wood powder fiber is: by wood powder fiber 45kg under room temperature, after stirring 36 hours, filters, wash wood powder fiber to neutrality with water in the aqueous sodium hydroxide solution of 136L20wt%; Then, wood powder fiber is stirred 30 hours in 90L18wt% hydrogen peroxide solution, filters and wash; Wood powder fiber is joined pH is 8 again, ultrasonic 3h in the 25wt% polysorbas20 aqueous solution, stir 18 hours after filter, after washing, stand-by after vacuum-drying 24h at 62 DEG C.
The preparation method of described toughening composition is:
(1) improved silica nanotube, styrene-butadiene-styrene block copolymer, activation wood powder fiber, silane coupling agent, solubilizing agent, filler and water is got for subsequent use;
(2) at room temperature silane coupling agent is added to the water, it is stirred to and dissolves completely, the obtained modified silane coupler aqueous solution; Then improved silica nanotube and activation wood powder fiber are joined in the silane coupling agent aqueous solution, after ultrasonic 3h, stir 5h, it is warming up to 59 DEG C again and stirs 36h, filter, powder is pressed the rotating speed centrifugal treating 35min of 500r/min, then by stand-by for powder vacuum-drying 30 hours at 55 DEG C;
(3) powder filler, styrene-butadiene-styrene block copolymer and step (2) made loads in high-speed mixer, after disperseing 4h under 350r/min rotating speed, it is warming up to 105 DEG C, add solubilizing agent again, after disperseing 22min under 530r/min rotating speed, put into the cooling of cold mixed pot, when temperature drops to 48 DEG C, put material, obtain just batch mixing;
(4) extrude after the first batch mixing that step (3) prepares is placed in the mixing 1h of twin screw extruder that temperature is 175 DEG C, rotating speed is 85r/min, obtain mixing materials;
(5) mixing materials pulverization process step (4) prepared, obtaining granularity is that 90 object concrete increase tough matrix material.
Prepare a method for high tenacity cracking resistance Grouting Cement mortar as above, comprise the following steps:
(1) cement and fine sand are mixed formation dry mash, then add water and stir evenly;
(2) adding in the mixture that step (1) is formed successively by hardening accelerator and water reducer, stir evenly, churning time is respectively 5 minutes;
(3) other material is added in the obtained mixture of step (2) simultaneously, stir fast evenly, be then pumped into by pressure pump and specify engineering position.
The present embodiment records the ultimate compression strength of 28 days urethane sand, folding strength, cohesive strength and water-intake rate and shrinking percentage is 59.45MPa, 19.8MPa, 4.7MPa, 0.25% and 0.28% respectively.
Embodiment 3
A kind of high tenacity cracking resistance Grouting Cement mortar, by weight, following component is comprised: cement 100 parts, 50 order fine sand 120 parts, 50 parts, water, polyurethane solution 5 parts, epoxy resin latex 10 parts, toughening composition 10 parts, hardening accelerator 6 parts, methacrylic acid 2 parts, calcium formiate 6 parts, neopentyl glycol 2 parts, Sodium dodecylbenzene sulfonate 0.8 part, water reducer 0.9 part; Described toughening composition, by weight, raw material consists of: improved silica nanotube 1.8 parts, styrene-butadiene-styrene block copolymer 22 parts, activation wood powder fiber 50 parts, silane coupling agent 3.5 parts, solubilizing agent 3.5 parts, filler 4 parts and 220 parts, water.
The preparation method of described improved silica nanotube comprises the following steps:
(1) each in two identical 5L nylon tanks load Stainless Steel Ball that 30 diameters are 10mm and 45 diameters are the Stainless Steel Ball of 5mm, then add 0.9kg silica nanometer pipe respectively, then drip respectively and add 90ml dehydrated alcohol, and seal with nylon lid; Put into ball mill by symmetrical for two ball grinders, rotating speed be 400rpm and every 30 minutes automatically conversion sense of rotation when ball-milling processing 48h;
(2) get step (1) process after silica nanometer pipe joins that pH is 8, in the 20wt% polysorbas20 aqueous solution, ultrasonic 18h, filters, after washing, vacuum-drying 15h at 57 DEG C;
(3) get the silica nanometer pipe after step (3) process to stir 48 hours in 40L, 35wt% aqueous sodium hydroxide solution, filter, after powder is cleaned with pure water, vacuum-drying 18h at 60 DEG C;
(4) getting the silica nanometer pipe after step (3) process to stir 72 hours in 35L, 20wt% hydrogen peroxide, filter, after being cleaned with pure water by powder, vacuum-drying 48h at 52 DEG C, obtains the silica nanometer pipe of 1.52kg surface band hydroxyl;
(5) get the silica nanometer pipe 1.5kg of surface band hydroxyl prepared by step (4), join in 40L methylene dichloride, under nitrogen protection after room temperature supersound process 3h, add 110ml boron trifluoride-ether complex and stirring at room temperature 3h; Again under-15 DEG C and agitation condition, slowly dripping and add 570ml3-methyl-3-hydroxymethyl-oxetane, it is 6h that control droplet adds the time; Continue to stir 1h in-13 DEG C after dropwising; Then 550ml anhydrous methanol is added, by the rotating speed centrifugal treating 20min of 6000rpm, Separation and Recovery solvent, powder is cleaned through anhydrous methanol and at room temperature after vacuum-drying 24h, is obtained 1.77kg improved silica nanotube;
The preparation method of described activation wood powder fiber is: by wood powder fiber 45kg under room temperature, after stirring 36 hours, filters, wash wood powder fiber to neutrality with water in the aqueous sodium hydroxide solution of 136L20wt%; Then, wood powder fiber is stirred 30 hours in 90L18wt% hydrogen peroxide solution, filters and wash; Wood powder fiber is joined pH is 8 again, ultrasonic 3h in the 25wt% polysorbas20 aqueous solution, stir 18 hours after filter, after washing, stand-by after vacuum-drying 24h at 62 DEG C.
The preparation method of described toughening composition is:
(1) improved silica nanotube, styrene-butadiene-styrene block copolymer, activation wood powder fiber, silane coupling agent, solubilizing agent, filler and water is got for subsequent use;
(2) at room temperature silane coupling agent is added to the water, it is stirred to and dissolves completely, the obtained modified silane coupler aqueous solution; Then improved silica nanotube and activation wood powder fiber are joined in the silane coupling agent aqueous solution, after ultrasonic 3h, stir 5h, it is warming up to 61 DEG C again and stirs 36h, filter, powder is pressed the rotating speed centrifugal treating 35min of 500r/min, then by stand-by for powder vacuum-drying 30 hours at 53 DEG C;
(3) powder filler, styrene-butadiene-styrene block copolymer and step (2) made loads in high-speed mixer, after disperseing 3h under 400r/min rotating speed, it is warming up to 110 DEG C, add solubilizing agent again, after disperseing 22min under 530r/min rotating speed, put into the cooling of cold mixed pot, when temperature drops to 50 DEG C, put material, obtain just batch mixing;
(4) extrude after the first batch mixing that step (3) prepares is placed in the mixing 1.5h of twin screw extruder that temperature is 190 DEG C, rotating speed is 70r/min, obtain mixing materials;
(5) mixing materials pulverization process step (4) prepared, obtaining granularity is that 200 object concrete increase tough matrix material.
Prepare a method for high tenacity cracking resistance Grouting Cement mortar as above, comprise the following steps:
(1) cement and fine sand are mixed formation dry mash, then add water and stir evenly;
(2) adding in the mixture that step (1) is formed successively by hardening accelerator and water reducer, stir evenly, churning time is respectively 8 minutes;
(3) other material is added in the obtained mixture of step (2) simultaneously, stir fast evenly, be then pumped into by pressure pump and specify engineering position.
The foregoing is only the better embodiment of the present invention, all impartial changes done according to the present patent application patent scope, with modifying, all should belong to the covering scope of the present invention.
Claims (7)
1. a high tenacity cracking resistance Grouting Cement mortar, it is characterized in that: by weight, comprise following component: cement 80-100 part, 50��200 order fine sand 120-180 parts, water 20-50 part, polyurethane solution 5-10 part, epoxy resin latex 5-10 part, toughening composition 10-15 part, hardening accelerator 1.5-6 part, methacrylic acid 2-9 part, calcium formiate 2-6 part, neopentyl glycol 2-8 part, Sodium dodecylbenzene sulfonate 0.2-0.8 part, water reducer 0.9-2.4 part; Described toughening composition, by weight, raw material consists of: improved silica nanotube 1.2-1.8 part, styrene-butadiene-styrene block copolymer 22-28 part, activation wood powder fiber 46-50 part, silane coupling agent 3.5-5 part, solubilizing agent 3.0-3.5 part, filler 4-6 part and water 180-220 part.
2. high tenacity cracking resistance Grouting Cement mortar according to claim 1, it is characterised in that: the preparation method of described improved silica nanotube comprises the following steps:
(1) each in two identical 5L nylon tanks load Stainless Steel Ball that 30 diameters are 10mm and 45 diameters are the Stainless Steel Ball of 5mm, then add 0.9kg silica nanometer pipe respectively, then drip respectively and add 90ml dehydrated alcohol, and seal with nylon lid; Put into ball mill by symmetrical for two ball grinders, rotating speed be 400rpm and every 30 minutes automatically conversion sense of rotation when ball-milling processing 48h;
(2) get step (1) process after silica nanometer pipe joins that pH is 8, in the 20wt% polysorbas20 aqueous solution, ultrasonic 18h, filters, after washing, vacuum-drying 15h at 55-57 DEG C;
(3) get the silica nanometer pipe after step (3) process to stir 48 hours in 40L, 35wt% aqueous sodium hydroxide solution, filter, after powder is cleaned with pure water, vacuum-drying 18h at 58-60 DEG C;
(4) getting the silica nanometer pipe after step (3) process to stir 72 hours in 35L, 20wt% hydrogen peroxide, filter, after being cleaned with pure water by powder, vacuum-drying 48h at 50-52 DEG C, obtains the silica nanometer pipe of 1.52-1.60kg surface band hydroxyl;
(5) get the silica nanometer pipe 1.5kg of surface band hydroxyl prepared by step (4), join in 40L methylene dichloride, under nitrogen protection after room temperature supersound process 3h, add 110ml boron trifluoride-ether complex and stirring at room temperature 3h; Again under-13 ~-15 DEG C and agitation condition, slowly dripping and add 570ml3-methyl-3-hydroxymethyl-oxetane, it is 6h that control droplet adds the time; Continue to stir 1h in-11 ~-13 DEG C after dropwising; Then adding 550ml anhydrous methanol, by the rotating speed centrifugal treating 20-25min of 5500-6000rpm, Separation and Recovery solvent, powder is cleaned through anhydrous methanol and at room temperature after vacuum-drying 24h, is obtained 1.77-1.86kg improved silica nanotube.
3. high tenacity cracking resistance Grouting Cement mortar according to claim 2, it is characterised in that: the silica nanometer pipe purity described in step (1) > 96%, length is 2-4 ��m, and caliber is 150-300nm, specific surface area > 500m2/g��
4. high tenacity cracking resistance Grouting Cement mortar according to claim 1, it is characterized in that: the preparation method of described activation wood powder fiber is: by wood powder fiber 45kg under room temperature, after the aqueous sodium hydroxide solution of 136L20wt% stirs 36 hours, filter, wood powder fiber is washed with water to neutrality; Then, wood powder fiber is stirred 30 hours in 90L18wt% hydrogen peroxide solution, filters and wash; Wood powder fiber is joined pH is 8 again, ultrasonic 3h in the 25wt% polysorbas20 aqueous solution, stir 18 hours after filter, after washing, stand-by after vacuum-drying 24h at 60-62 DEG C.
5. high tenacity cracking resistance Grouting Cement mortar according to claim 1, it is characterised in that: the preparation method of described toughening composition is:
(1) improved silica nanotube, styrene-butadiene-styrene block copolymer, activation wood powder fiber, silane coupling agent, solubilizing agent, filler and water is got for subsequent use;
(2) at room temperature silane coupling agent is added to the water, it is stirred to and dissolves completely, the obtained modified silane coupler aqueous solution; Then improved silica nanotube and activation wood powder fiber are joined in the silane coupling agent aqueous solution, after ultrasonic 3h, stir 5h, it is warming up to 59-61 DEG C again and stirs 36h, filter, powder is pressed the rotating speed centrifugal treating 35min of 500r/min, then by stand-by for powder vacuum-drying 30 hours at 53-55 DEG C;
(3) powder filler, styrene-butadiene-styrene block copolymer and step (2) made loads in high-speed mixer, after disperseing 3-4h under 350-400r/min rotating speed, it is warming up to 105-110 DEG C, add solubilizing agent again, after disperseing 18-22min under 530-600r/min rotating speed, put into the cooling of cold mixed pot, when temperature drops to 48-50 DEG C, put material, obtain just batch mixing;
(4) extrude after the first batch mixing that step (3) prepares is placed in the mixing 1-1.5h of twin screw extruder that temperature is 175-190 DEG C, rotating speed is 70-85r/min, obtain mixing materials;
(5) mixing materials pulverization process step (4) prepared, obtaining granularity is that 90-200 object concrete increases tough matrix material.
6. high tenacity cracking resistance Grouting Cement mortar according to claim 1, it is characterised in that: described hardening accelerator is one or more in villaumite, vitriol, nitrate, nitrite, trolamine, acetic acid, acetate; Described water reducer is one or more in naphthalenesulfonate formaldehyde condensation compound and sulfonated melamine compound condenses; Described solubilizing agent is maleic anhydride graft copolymer; Described filler is acicular wollastonite, and particle diameter is 1-25 ��m.
7. prepare the method for the high tenacity cracking resistance Grouting Cement mortar as described in item as arbitrary in claim 1-6 for one kind, it is characterised in that: comprise the following steps:
(1) cement and fine sand are mixed formation dry mash, then add water and stir evenly;
(2) adding in the mixture that step (1) is formed successively by hardening accelerator and water reducer, stir evenly, churning time is respectively 5��8 minutes;
(3) other material is added in the obtained mixture of step (2) simultaneously, stir fast evenly, be then pumped into by pressure pump and specify engineering position.
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| CN107200515A (en) * | 2017-05-31 | 2017-09-26 | 福建江夏学院 | A kind of high tenacity cement mortar and preparation method thereof |
| CN107434428A (en) * | 2017-08-22 | 2017-12-05 | 绍兴职业技术学院 | A kind of preparation method that the permeable mortar of the high-elastic mould of pouring type self-compaction is produced using building waste |
| CN108947458A (en) * | 2018-09-29 | 2018-12-07 | 福建江夏学院 | A kind of high tenacity perfusion mortar and preparation method thereof |
| CN109020347A (en) * | 2018-09-29 | 2018-12-18 | 福建江夏学院 | A kind of composite toughening perfusion mortar and preparation method thereof |
| CN113816679A (en) * | 2021-09-25 | 2021-12-21 | 北京建工一建工程建设有限公司 | Lean concrete applied to complex geological environment and preparation process thereof |
| CN115650642A (en) * | 2022-09-15 | 2023-01-31 | 江苏百瑞吉新材料有限公司 | Toughened cement mortar and preparation method thereof |
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