CN110357521A - High ductility mortar of high-strength light and preparation method thereof - Google Patents

High ductility mortar of high-strength light and preparation method thereof Download PDF

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Publication number
CN110357521A
CN110357521A CN201910573404.2A CN201910573404A CN110357521A CN 110357521 A CN110357521 A CN 110357521A CN 201910573404 A CN201910573404 A CN 201910573404A CN 110357521 A CN110357521 A CN 110357521A
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China
Prior art keywords
parts
mixture
mortar
powder
water
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Chinese (zh)
Inventor
俞可权
李凌志
谭迪
余江滔
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Tongji University
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Tongji University
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Publication of CN110357521A publication Critical patent/CN110357521A/en
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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
    • C04B28/02—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 containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • 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
    • C04B2111/40—Porous or lightweight materials
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention provides high ductility mortars of a kind of high-strength light and preparation method thereof, the mortar includes cement, silicon ash, slag powders, again green powder, fly ash float, glass microballoon, reclaimed rubber powder, water-reducing agent, water, ultra high molecular weight polyethylene fiber and polyester fiber, preparation method includes that cement, silicon ash, slag powders, again green powder, fly ash float, glass microballoon and the mixing of reclaimed rubber powder are obtained the first mixture；The mixing liquid of water-reducing agent water is added in the first mixture and is stirred, the second mixture is obtained；Ultra high molecular weight polyethylene fiber and polyester fiber are added in the second mixture and stirred, third mixture is obtained；Third mixture is finally subjected to vibrate molding, maintenance；Mortar of the invention has the characteristics that lightweight, high compressive strength, high-tensile, excellent energy dissipation capacity, higher stretching charge-mass ratio and Ultra-Drawing ductility, to can significantly reduce the self weight of material and structure, and keeps enough bearing capacities.

Description

High ductility mortar of high-strength light and preparation method thereof
Technical field
The invention belongs to building material technical fields, and in particular to a kind of high ductility mortar of high-strength light and its preparation side Method.
Background technique
The compression strength of ultra-high performance concrete (Ultra high performance concrete, abbreviation UHPC) reaches To 200MPa, flexural strength reaches 20-40MPa, and vertical pulling intensity is not less than 8MPa.In published patent (CN104030634A, CN101874004A), ultra-high performance concrete material have significant strength characteristics, including pressure resistance Degree, flexural strength and simple tension intensity, but its simple tension strain is only 0.5%, and can not form multiple cracking distribution, is answered Variate has significant dimensional effect.The simple tension strain only slightly above yield strain of reinforcing bar, leads to UHPC component still There are the widened danger of crack localization, to limit UHPC material in the use of component tensile region.It is big due to steel fibre Amount incorporation, UHPC density are up to 2500-2600kg/m3, the charge-mass ratio of tensile strength and self weight is smaller, is unfavorable for structural weight reduction. In addition, there is also the risks of corrosion for the steel fibre that largely mixes of UHPC itself, to reduce the durability of UHPC component.It is conventional Lightweight concrete CN109574562A, light mortar CN109160786A only have strength characteristic, without having stretching ductility spy Sign.
Chinese invention patent is that CN101665342A discloses a kind of high-tenacity crack-control impervious fiber concrete, main component Including cement, active mineral admixture, aggregate, fiber and water, active mineral admixture uses flyash, silicon ash, granulated blast-furnace Slag, metakaolin, fiber use vinal, polyethylene fibre, aromatic polyamide fibre, the maximum particle diameter of aggregate No more than 0.5mm, the weight and the ratio between cement and active mineral admixture total weight of aggregate are 1~70%, and the volume of fiber is The 1.5~2.5% of fiber concrete total volume.Between 40-60MPa, tensile strength is the compression strength of the patent concrete 4-10MPa, flexural tensile strength 10-20MPa, limit tensile strain 1.8-7.5%, density 2000-2200kg/m3.But The resistance to compression bullet mould of the patent concrete is low, the charge-mass ratio of compression strength, flexural tensile strength and tensile strength and self weight all have into The space that one step is promoted.
Summary of the invention
Aiming at the shortcomings in the prior art, in order to solve, UHPC density of material is big, ductility is small, charge-mass ratio is insufficient and existing High-tenacity crack-control lint concrete strength plays the technical issues of mould is low etc., and primary and foremost purpose of the invention, which is to provide one kind, to be had Lightweight, high compressive strength, high-tensile, and it is able to maintain Ultra-Drawing ductility, have excellent energy dissipation capacity, higher stretching lotus matter The mortar material of ratio.
A second object of the present invention is to provide the preparation methods of above-mentioned mortar.
In order to achieve the above objectives, solution of the invention is:
A kind of high ductility mortar of high-strength light comprising the component of following parts by weight:
300-600 parts of cement；
100-250 parts of silicon ash；
0-450 parts of slag powders；
Powder 0-250 parts of regeneration；
0-300 parts of fly ash float；
0-200 parts of glass microballoon；
0-300 parts of reclaimed rubber powder；
20-50 parts of water-reducing agent；
150-300 parts of water；
5-15 parts of ultra high molecular weight polyethylene fiber；
0-10 parts of polyester fiber.
Further, cement is composite Portland cement or ordinary portland cement, 28 days compression strength of cement >= 52.5MPa, 28 days flexural strength >=7.0MPa, specific surface area >=300m2/kg。
Further, the specific surface area of silicon ash is 20-25m2/ g, mass content >=90% of silica.
Further, slag powders are S105 grade slag powder or S115 grade slag powder, specific surface area >=700m2/ kg, density are 2.9g/cm3。
Further, then specific surface area >=400m of green powder2/ kg, density 2.4g/cm3。
Further, the flyash in fly ash float is level-one flyash, specific surface area >=700m2/ kg, density are 2.6g/cm3。
Further, the partial size of fly ash float is no more than 150 μm, density 450-600kg/m3。
Further, the partial size of glass microballoon is no more than 100 μm, density 300-500kg/m3。
Further, the partial size of reclaimed rubber powder is no more than 200 μm, density 400-600kg/m3。
Further, the diameter of ultra high molecular weight polyethylene fiber is 20-28 μm, length 12-18mm, draw ratio >= 600, fracture elongation 2-3%, tensile strength 2000-3000MPa, elasticity modulus 80000-100000MPa.
Further, the diameter of polyester fiber is 30-40 μm, length 9-12mm, draw ratio >=300, fracture elongation For 5-6%, tensile strength 800-1200MPa, elasticity modulus 40000-50000MPa.
A kind of preparation method of the high ductility mortar of above-mentioned high-strength light comprising following steps:
(1), by 300-600 parts of cement, 100-250 parts of silicon ashes, 0-450 parts of slag powders, 0-250 parts of green powders, 0-300 again Part fly ash float, 0-200 parts of glass microballoons and 0-300 parts of reclaimed rubber powder are mixed, and obtain the first mixture；
(2), the mixing liquid of 20-50 parts of water-reducing agents and 150-300 parts of water is added in the first mixture and is stirred, obtain the Two mixtures；
(3), 5-15 parts of ultra high molecular weight polyethylene fibers and 0-10 parts of polyester fibers are added in the second mixture and are stirred, Obtain third mixture；
(4), third mixture is finally subjected to vibrate molding, maintenance, obtains the high ductility mortar of high-strength light.
Further, in step (1), the time of stirring is 2-3min.
Further, in step (2), the time of stirring is 5-6min.
Further, in step (3), the time of stirring is 10-12min.
Further, in step (4), the time vibrated is 1-2min.
Further, in step (4), the condition of maintenance are as follows: controlled at 20-25 DEG C, humidity is 90 ± 5%, maintenance Time be 28 days.
By adopting the above scheme, the beneficial effects of the present invention are:
The first, mortar of the invention reduces the close of mortar while reaching higher-strength (resistance to compression and tensile strength) Degree, and the simple tension ductility of superelevation is kept, the ratio of tensile strength and density reaches the 2-3 of UHPC Yu high tenacity concrete Times, there is good energy consumption, to can significantly reduce the self weight of material and structure, and keep enough bearing capacities.
The second, the present invention is based on the design principles of mesomechanics, optimize source material mixture ratio, significantly reduce sand coarse aggregate ratio, preferably Fiber mechanics parameter realizes the bridging effect of fiber by bond stress excellent between fiber and matrix, to make of the invention Mortar has excellent microcrack dispersion performance and control of crack width performance, improves the durability of component.
Third, method for preparing mortar of the invention are simple, and raw material sources are extensive, and economic cost is low, and a large amount of using discarded Raw material is recycled, to be suitable for large-scale industry Application in Building and reduce the influence to environment.
Detailed description of the invention
Fig. 1 is the uniaxial direct tensile test specimen stress-strain schematic diagram of the 1-1 match ratio in the embodiment of the present invention 1.
Fig. 2 is bending specimen stress-stress-amount of deflection/span figure of the 1-1 match ratio in the embodiment of the present invention 1.
Fig. 3 is tensile stress-schematic illustration of strain of the 1-3 match ratio in the embodiment of the present invention 1.
Fig. 4 is tensile stress-schematic illustration of strain of the 5-2 match ratio in the embodiment of the present invention 5.
Specific embodiment
The present invention provides high ductility mortars of a kind of high-strength light and preparation method thereof.
<the high ductility mortar of high-strength light>
The high ductility mortar of high-strength light of the invention includes the component of following parts by weight:
300-600 parts of cement；
100-250 parts of silicon ash；
0-450 parts of slag powders；
Powder 0-250 parts of regeneration；
0-300 parts of fly ash float；
0-200 parts of glass microballoon；
0-300 parts of reclaimed rubber powder；
20-50 parts of water-reducing agent；
150-300 parts of water；
5-15 parts of ultra high molecular weight polyethylene fiber；
0-10 parts of polyester fiber.
(cement)
Wherein, cement is composite Portland cement or ordinary portland cement, 28 days compression strength of cement >= 52.5MPa, 28 days flexural strength >=7.0MPa, specific surface area >=300m2/kg。
(silicon ash)
The specific surface area of silicon ash is 20-25m2/ g, mass content >=90% of silica.
(slag powders)
Slag powders are S105 grade slag powder or S115 grade slag powder, specific surface area >=700m2/ kg, density 2.9g/cm3。
(green powder again)
Specific surface area >=400m of green powder again2/ kg, density 2.4g/cm3。
(fly ash float)
Flyash in fly ash float is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3.Powder The partial size of coal ash floating bead is no more than 150 μm, density 450-600kg/m3。
(glass microballoon)
The partial size of glass microballoon is no more than 100 μm, density 300-500kg/m3。
Wherein, the density of the mortar can be effectively reduced in fly ash float and glass microballoon, and fly ash float and glass are micro- Pearl is inorganic substances, effectively compatible with original system, obtains the high intensity and low-density characteristic of mortar.
(reclaimed rubber powder)
The partial size of reclaimed rubber powder is no more than 200 μm, density 400-600kg/m3。
Wherein, reclaimed rubber powder can recycle waste rubber tire, to be conducive to environmental protection.
(ultra high molecular weight polyethylene fiber)
The diameter of ultra high molecular weight polyethylene fiber is 20-28 μm, length 12-18mm, and draw ratio >=600, fracture is prolonged Stretching rate is 2-3%, tensile strength 2000-3000MPa, elasticity modulus 80000-100000MPa.
In fact, ultra high molecular weight polyethylene fiber plays the role of main toughening mortar matrix in formula system, The mortar is set to generate continuous thin and close crack.The fibre diameter, draw ratio, breaking strength and fracture elongation, one Aspect is controlled by the technical matters of fibre manufacturer man, on the other hand by theoretical calculation and test tune based on mesomechanics With obtaining.Fiber Aspect Ratio is excessive, be easy to cause break of CFRP, and draw ratio is insufficient, be easy to cause spike protein gene, both cannot Concrete is set to generate the fine and closely woven crack of connection.
(polyester fiber)
The diameter of polyester fiber is 30-40 μm, length 9-12mm, draw ratio >=300, and fracture elongation 5-6% is drawn Stretching intensity is 800-1200MPa, elasticity modulus 40000-50000MPa.
Wherein, polyester fiber is Regenerated Polyester Fibres, has the characteristics that environmental protection and low price, with ultra-high molecular weight polyethylene Fiber high level matches with low level, to effectively reduce the cost of manufacture of the mortar and its influence to environment.
<preparation method of the high ductility mortar of high-strength light>
The preparation method of the high ductility mortar of high-strength light of the invention the following steps are included:
(1), by 300-600 parts of cement, 100-250 parts of silicon ashes, 0-450 parts of slag powders, 0-250 parts of green powders, 0-300 again Part fly ash float, 0-200 parts of glass microballoons and 0-300 parts of reclaimed rubber powder, which are added in blenders, to be sufficiently mixed uniformly, is done Powder stirring, obtains the first mixture；
(2), the mixing liquid of 20-50 parts of water-reducing agents and 150-300 parts of water is added in the first mixture and is stirred, make dry powder It is slurried, obtains the second mixture；
(3), 5-15 parts of ultra high molecular weight polyethylene fibers and 0-10 parts of polyester fibers are added portionwise in the second mixture Stirring, obtains third mixture；
(4), finally third mixture is transferred in mold, carries out molding of vibrating, carries out standard curing after demoulding, obtain The high ductility mortar of high-strength light.
Wherein, in step (1), the time of stirring can be 2-3min, preferably 2min.
In step (2), the time of stirring can be 5-6min, preferably 5min.
In step (3), the purpose being added portionwise is: to ensure ultra high molecular weight polyethylene fiber and Regenerated Polyester Fibres It is uniformly dispersed.
The time of stirring can be 10-12min, preferably 10min.
In step (4), the time vibrated can be 1-2min, preferably 1min.
In step (4), the condition of maintenance are as follows: control temperature can be 20-25 DEG C, preferably 25 DEG C；Humidity can be 90 ± 5%, preferably 90%；The time of maintenance is 28 days.
Specifically, in the preparation process in accordance with the present invention, using slag powders, silicon ash, regeneration powder as active mineral additives, Cement is cementitious material, and fly ash float, glass microballoon, reclaimed rubber powder are light filler, and water-reducing agent are used in combination And reinforcing fiber is combined compression strength, tensile strength and tension ductility, tension well by suitable component compatibility Intensity, elongation percentage, charge-mass ratio and toughness are obviously improved compared with the prior art.
The present invention is further illustrated with reference to embodiments.
It is well known commercially available industrial chemicals if not raw material used in embodiment are special.
Embodiment 1:
Containing there are three product in the present embodiment, number is denoted as 1-1,1-2,1-3 respectively.
The high ductility mortar of the high-strength light of the present embodiment, including P.O.52.5 (28 days compression strength > 52.5MPa of cement) Ordinary portland cement, silicon ash, slag powders, green powder, fly ash float, water-reducing agent, tap water and super high molecular weight are poly- again Vinyl fiber.Each component is as shown in table 1 below, and each section is parts by weight content in table, wherein ultra-high molecular weight polyethylene in table 1 The length of fiber is 12mm, draw ratio 600.
1 product component of table and parts by weight content
The preparation method of the high ductility mortar of the high-strength light of the present embodiment the following steps are included:
(1), by cement, silicon ash, slag powders, again green powder, fly ash float be added blender in be sufficiently mixed uniformly, do Powder stirs 2min, obtains the first mixture；
(2), the mixing liquid of water-reducing agent and water is added in the first mixture and stirs 5min, dry powder is slurried, obtain the Two mixtures；
(3), ultra high molecular weight polyethylene fiber is added portionwise in the second mixture and stirs 10min, guarantee supra polymer Weight polyethylene fiber is uniformly dispersed, and obtains third mixture；
(4), finally third mixture is transferred in mold, the 1min that vibrates molding is conserved after demoulding, is supported in standard Shield places 28d in room, obtains the high ductility mortar of high-strength light.The mechanical property test result of the product prepared by such as table 2, figure 1 to shown in Fig. 3.
2 product mechanical property experimental test result of table
As shown in Figure 1, illustrate that the mortar of 1-1 match ratio in the present embodiment has good high tensile and stretches to prolong Property.As shown in Figure 2, illustrate that the mortar of 1-1 match ratio in the present embodiment has high bending strength and bend ductility.It can by Fig. 3 Know, illustrates that the mortar of 1-3 match ratio in the present embodiment has high tensile and stretching ductility.
Embodiment 2:
Containing there are three product in the present embodiment, number is denoted as 2-1,2-2,2-3 respectively.
The high ductility mortar of the high-strength light of the present embodiment, including P.O.52.5 (28 days compression strength > 52.5MPa of cement) Ordinary portland cement, silicon ash, slag powders, again green powder, glass microballoon, water-reducing agent, tap water and superhigh molecular weight polyethylene Alkene fiber.Each component is as shown in table 3 below, and each section is parts by weight content in table, wherein ultra-high molecular weight polyethylene is fine in table 3 The length of dimension is 12mm, draw ratio 600.
3 product component of table and parts by weight content
The preparation method of the high ductility mortar of the high-strength light of the present embodiment the following steps are included:
(1), by cement, silicon ash, slag powders, again green powder, glass microballoon be added blender in be sufficiently mixed uniformly, dry powder 3min is stirred, the first mixture is obtained；
(2), the mixing liquid of water-reducing agent and water is added in the first mixture and stirs 6min, dry powder is slurried, obtain the Two mixtures；
(3), ultra high molecular weight polyethylene fiber is added portionwise in the second mixture and stirs 12min, guarantee supra polymer Weight polyethylene fiber is uniformly dispersed, and obtains third mixture；
(4), finally third mixture is transferred in mold, the 2min that vibrates molding is conserved after demoulding, is supported in standard Shield places 28d in room, obtains the high ductility mortar of high-strength light.The mechanical property test result of the product prepared by such as 4 institute of table Show.
4 product mechanical property experimental test result of table
Embodiment 3:
Containing there are three product in the present embodiment, number is denoted as 3-1,3-2,3-3 respectively.
The high ductility mortar of the high-strength light of the present embodiment, including P.O.52.5 (28 days compression strength > 52.5MPa of cement) Ordinary portland cement, silicon ash, slag powders, again green powder, reclaimed rubber powder, water-reducing agent, tap water, superhigh molecular weight polyethylene Alkene fiber and polyester fiber.Each component is as shown in table 5 below, and each section is parts by weight content in table, wherein supra polymer in table 5 The length of weight polyethylene fiber is 18mm, draw ratio 900.
5 product component of table and parts by weight content
The preparation method of the high ductility mortar of the high-strength light of the present embodiment the following steps are included:
(1), by cement, silicon ash, slag powders, again green powder, reclaimed rubber powder be added blender in be sufficiently mixed uniformly, Dry powder stirs 2min, obtains the first mixture；
(2), the mixing liquid of water-reducing agent and water is added in the first mixture and stirs 5min, dry powder is slurried, obtain the Two mixtures；
(3), ultra high molecular weight polyethylene fiber and polyester fiber are added portionwise in the second mixture and stir 10min, protected Card ultra high molecular weight polyethylene fiber is uniformly dispersed, and obtains third mixture；
(4), finally third mixture is transferred in mold, the 1min that vibrates molding is conserved after demoulding, is supported in standard Shield places 28d in room, obtains the high ductility mortar of high-strength light.The mechanical property test result of the product prepared by such as 6 institute of table Show.
6 product mechanical property experimental test result of table
Embodiment 4:
Containing there are three product in the present embodiment, number is denoted as 4-1,4-2,4-3 respectively.
The high ductility mortar of the high-strength light of the present embodiment, including P.O.52.5 (28 days compression strength > 52.5MPa of cement) Ordinary portland cement, silicon ash, slag powders, again green powder, reclaimed rubber powder, water-reducing agent, tap water, superhigh molecular weight polyethylene Alkene fiber and polyester fiber.Each component is as shown in table 7 below, and each section is parts by weight content in table, wherein supra polymer in table 7 The length of weight polyethylene fiber is 18mm, draw ratio 900；The length of polyester fiber is 12mm, draw ratio 300.
7 product component of table and parts by weight content
The preparation method of the high ductility mortar of the high-strength light of the present embodiment the following steps are included:
(1), by cement, silicon ash, slag powders, again green powder, reclaimed rubber powder be added blender in be sufficiently mixed uniformly, Dry powder stirs 3min, obtains the first mixture；
(2), the mixing liquid of water-reducing agent and water is added in the first mixture and stirs 6min, dry powder is slurried, obtain the Two mixtures；
(3), ultra high molecular weight polyethylene fiber and polyester fiber are added portionwise in the second mixture and stir 12min, protected Card ultra high molecular weight polyethylene fiber is uniformly dispersed, and obtains third mixture；
(4), finally third mixture is transferred in mold, the 1min that vibrates molding is conserved after demoulding, is supported in standard Shield places 28d in room, obtains the high ductility mortar of high-strength light.The mechanical property test result of the product prepared by such as 8 institute of table Show.
8 product mechanical property experimental test result of table
Embodiment 5:
Containing there are three product in the present embodiment, number is denoted as 5-1,5-2 respectively.
The high ductility mortar of the high-strength light of the present embodiment, including P.O.52.5 (28 days compression strength > 52.5MPa of cement) Ordinary portland cement, silicon ash, again green powder, glass microballoon, water-reducing agent, tap water and ultra high molecular weight polyethylene fiber. Each component is as shown in table 9 below, and each section is parts by weight content in table, wherein the length of ultra high molecular weight polyethylene fiber in table 9 For 18mm, draw ratio 900.
9 product component of table and parts by weight content
The preparation method of the high ductility mortar of the high-strength light of the present embodiment the following steps are included:
(1), by cement, silicon ash, again green powder, glass microballoon be added blender in be sufficiently mixed uniformly, dry powder stirring 2min obtains the first mixture；
(2), the mixing liquid of water-reducing agent and water is added in the first mixture and stirs 5min, dry powder is slurried, obtain the Two mixtures；
(3), ultra high molecular weight polyethylene fiber is added portionwise in the second mixture and stirs 10min, guarantee supra polymer Weight polyethylene fiber is uniformly dispersed, and obtains third mixture；
(4), finally third mixture is transferred in mold, the 1min that vibrates molding is conserved after demoulding, is supported in standard Shield places 28d in room, obtains the high ductility mortar of high-strength light.The mechanical property test result of the product prepared by such as 10 He of table Shown in Fig. 4.
10 product mechanical property experimental test result of table
As shown in Figure 4, illustrate that the mortar of 5-2 match ratio in the present embodiment has high tensile and stretching ductility.
It can be seen from the above, the compression strength of mortar of the present invention reaches 55-100MPa, flexural strength reaches 15-25MPa, resists Tensile strength reaches 7-10MPa, and tension elongation percentage reaches 6-9%, density 1225-1710kg/m3, illustrate mortar tool of the invention There is the characteristics of lightweight, high compressive strength, high-tensile, excellent energy dissipation capacity, higher stretching charge-mass ratio and Ultra-Drawing ductility, Therefore, there is good actual application prospect.
The above-mentioned description to embodiment is that this hair can be understood and used for the ease of those skilled in the art It is bright.Those skilled in the art obviously readily can make various modifications to these embodiments, and described herein one As principle be applied in other embodiments, without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments. Those skilled in the art's principle according to the present invention, not departing from improvement that scope of the invention is made and modification all should be at this Within the protection scope of invention.

Claims (10)

1. a kind of high ductility mortar of high-strength light, it is characterised in that: it includes the component of following parts by weight:
300-600 parts of cement；
100-250 parts of silicon ash；
0-450 parts of slag powders；
Powder 0-250 parts of regeneration；
0-300 parts of fly ash float；
0-200 parts of glass microballoon；
0-300 parts of reclaimed rubber powder；
20-50 parts of water-reducing agent；
150-300 parts of water；
5-15 parts of ultra high molecular weight polyethylene fiber；
0-10 parts of polyester fiber.
2. the high ductility mortar of high-strength light according to claim 1, it is characterised in that: the cement is complex silicate salt water Mud or ordinary portland cement, 28 days compression strength >=52.5MPa of the cement, 28 days flexural strength >=7.0MPa, than Surface area >=300m2/kg；And/or
The specific surface area of the silicon ash is 20-25m2/ g, mass content >=90% of silica.
3. the high ductility mortar of high-strength light according to claim 1, it is characterised in that: the slag powders are S105 grades of slags Powder or S115 grade slag powder, specific surface area >=700m2/ kg, density 2.9g/cm3；And/or
Specific surface area >=400m of the green powder again2/ kg, density 2.4g/cm3。
4. the high ductility mortar of high-strength light according to claim 1, it is characterised in that: the fine coal in the fly ash float Ash is level-one flyash, specific surface area >=700m2/ kg, density 2.6g/cm3；And/or
The partial size of the fly ash float is no more than 150 μm, density 450-600kg/m3。
5. the high ductility mortar of high-strength light according to claim 1, it is characterised in that: the partial size of the glass microballoon does not surpass 100 μm are crossed, density 300-500kg/m3。
6. the high ductility mortar of high-strength light according to claim 1, it is characterised in that: the partial size of the reclaimed rubber powder No more than 200 μm, density 400-600kg/m3。
7. the high ductility mortar of high-strength light according to claim 1, it is characterised in that: the ultra-high molecular weight polyethylene is fine The diameter of dimension is 20-28 μm, length 12-18mm, draw ratio >=600, fracture elongation 2-3%, tensile strength 2000- 3000MPa, elasticity modulus 80000-100000MPa；And/or
The diameter of the polyester fiber is 30-40 μm, length 9-12mm, draw ratio >=300, and fracture elongation 5-6% is drawn Stretching intensity is 800-1200MPa, elasticity modulus 40000-50000MPa.
8. a kind of preparation method of the high ductility mortar of high-strength light according to claim 1-7, it is characterised in that: Itself the following steps are included:
(1), by 300-600 parts of cement, 100-250 parts of silicon ashes, 0-450 parts of slag powders, 0-250 parts of green powder, 0-300 part powder again Coal ash floating bead, 0-200 part glass microballoon and 0-300 parts of reclaimed rubber powder are mixed, and obtain the first mixture；
(2), the mixing liquid of 20-50 parts of water-reducing agents and 150-300 parts of water is added in first mixture and is stirred, obtain the Two mixtures；
(3), 5-15 parts of ultra high molecular weight polyethylene fibers and 0-10 parts of polyester fibers are added in second mixture and are stirred, Obtain third mixture；
(4), the third mixture is finally subjected to vibrate molding, maintenance, obtains the high ductility mortar of high-strength light.
9. preparation method according to claim 8, it is characterised in that: in step (1), the time of the stirring is 2- 3min；And/or
In step (2), the time of the stirring is 5-6min；And/or
In step (3), the time of the stirring is 10-12min.
10. preparation method according to claim 8, it is characterised in that: in step (4), the time vibrated is 1- 2min；And/or
In step (4), the condition of the maintenance are as follows: controlled at 20-25 DEG C, humidity is 90 ± 5%, and the time of maintenance is 28 It.
CN201910573404.2A 2019-06-28 2019-06-28 High ductility mortar of high-strength light and preparation method thereof Pending CN110357521A (en)

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CN113501684A (en) * 2021-07-22 2021-10-15 武汉大学 Light high-ductility geopolymer material and preparation method thereof
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