Background technology
The main raw material(s) of producing dry-mixed mortar has: cement, lime, gypsum, flyash, slag micropowder, sand, admixture etc.Gathering materials in the dry-mixed mortar mainly adopted natural sand at present, it is a kind of non-renewable region resource, growing along with the national basis Facilities Construction, the situation that the natural sand resource gradually reduced even do not have natural sand occurred in the many areas of China, therefore the artificial sand to substitute natural sand by the industrial residue preparation is the important channel that produces dry-mixed mortar.
The industrial residue that produces when ferro-alloy cinder is ferroalloy smelting, according to the kind difference of producing iron alloy, ferro-alloy cinder can be divided into manganeseirom slag, ferro-silicon slag, ferrochrome slag, stainless steel slag etc.Ferro-alloy cinder is naturally cooling or little water short its cooling formation unit weight and the bigger stone pledge material of lumpiness in air, grey or grey black, be similar to natural Black Warrior matter or flower hilllock matter lava, the pore that inside has the aperture of some amount to differ, hardness is big, intensity is high.This big blocky stone matter waste residue through cooling slowly, forms metastable crystalline texture in discharging process.Its essential mineral is gehlenite, akermanite, lime feldspar, sulfurated lime, Dicalcium Phosphate (Feed Grade) and a large amount of vitreums.Except that silicic acid dicalcium and vitreum have slow hydraulic voltinism and the lateral reactivity, Stability Analysis of Structures under other mineral normal temperature, the hydraulicity are relatively poor.The chemical constitution of ferro-alloy cinder is mainly: SiO
2, Al
2O
3, CaO, MgO, Fe
2O
3, SiO
2, Al
2O
3, composition such as CaO.Excite SiO in the glassy phase with alkali
2, Al
2O
3Deng composition, Si-O, Al-O key are ruptured, produce silicate, aluminate plasma, help combining with gelling material, shorten time of coagulation, improve intensity, so ferro-alloy cinder is that the dry-mixed mortar ideal gathers materials.
The applicant is 201110009379.9 in the Chinese invention patent application number of in January, 2011 application, name is called the disclosed alkaline modification liquid method of modifying of ferro-alloy cinder artificial sand in " a kind of preparation method of artificial sand ", ferro-alloy cinder is made the sand grains that particle diameter is 0.1 ~ 5mm, and sand grains is made artificial sand through the modification of parlkaline modification liquid, drying.Alkalescence modification liquid preferred concentration is 0.05 ~ 0.2wt%, and wherein solute is Ca (OH)
2And NaOH, both weight ratios are 5 ~ 15:2 ~ 5, solvent is a water.Preferred alkaline modification liquid also comprises the water glass of 0.02wt%.The weight ratio of preferred sand grains and alkaline modification liquid is 1:1.Carry out modification by the mode that sand grains is sprayed alkaline modification liquid.To sand grains spray several times alkalescence modification liquid.The artificial sand that makes uses through after the size classification.Solved the ferro-alloy cinder artificial sand and made general red phenomenon behind the mortar, and to a certain degree be the mechanical property that has strengthened mortar.But the performance of the ferro-alloy cinder artificial sand after the modification of parlkaline modification liquid also has very big excavated space.
Summary of the invention
In order further to excavate the performance of the ferro-alloy cinder artificial sand after the modification of parlkaline modification liquid, the artificial sand to substitute natural sand of ferro-alloy cinder that the liquid of parlkaline modification is handled is as the common dry-mixed mortar of raw material production, its main raw material has: ferro-alloy cinder artificial sand, cement, flyash, slag micropowder, tuff micro mist, slag micro powder have obtained the better mortar product of performance.
The present invention is achieved by the following measures:
A kind of dry-mixed mortar comprises following component:
Silicate cement, ferro-alloy cinder artificial sand, flyash or tuff micro mist or both mixtures, slag micropowder or slag micro powder or both mixtures, ether of cellulose;
Described ferro-alloy cinder artificial sand is through the modification of parlkaline modification liquid, is divided into coarse sand, medium sand, fine sand according to particle size range 5 ~ 2.5mm, 2.49 ~ 1mm, 0.99 ~ 0.1mm, and the specific surface area of slag micropowder, tuff micro mist and slag micro powder is 400 ~ 500 m
2/ kg,
The shared weight part of each component is:
8~25 parts of silicate cements, 0~40 part of coarse sand, 10~40 parts of medium sands, 10~40 parts of fine sands,
5~10 parts in flyash or tuff micro mist or both mixtures, 5~10 parts in slag micropowder or slag micro powder or both mixtures, 0.03 part of ether of cellulose.
Described dry-mixed mortar, the shared weight part of each component is as follows:
8~12 parts of silicate cements, 20~30 parts of coarse sands, 10~20 parts of medium sands, 25~35 parts of fine sands,
5~10 parts in flyash or tuff micro mist or both mixtures,
5~10 parts in slag micropowder or slag micro powder or both mixtures, 0.03 part of ether of cellulose.
Described dry-mixed mortar, the shared weight part of each component is as follows:
10~17 parts of silicate cements, 30~40 parts of medium sands, 35~40 parts of fine sands,
5~10 parts in flyash or tuff micro mist or both mixtures,
5~10 parts in slag micropowder or slag micro powder or both mixtures, 0.03 part of ether of cellulose.
Described dry-mixed mortar, the shared weight part of each component is as follows:
12~25 parts of silicate cements, 20~40 parts of coarse sands, 20~35 parts of medium sands, 20~30 parts of fine sands,
5~10 parts in flyash or tuff micro mist or both mixtures,
5~10 parts in slag micropowder or slag micro powder or both mixtures, 0.03 part of ether of cellulose.
The aqueous solution of described ether of cellulose 2% is 100000 ~ 150000 centipoises 20 ℃ of viscosity.
Described dry-mixed mortar also comprises the redispersable latex powder of 3 weight parts.
Described alkaline modification liquid concentration is 0.05 ~ 0.2wt%, and wherein solute is Ca (OH)
2And NaOH, both weight ratios are 5 ~ 15:2 ~ 5, solvent is a water.
Described dry-mixed mortar is characterized in that described alkaline modification liquid also comprises the water glass of 0.02wt%.
Described dry-mixed mortar, the weight ratio that it is characterized in that described ferro-alloy cinder artificial sand and alkaline modification liquid is 1:1.
Flyash is to receive the thin ash of catching the flue gas behind coal combustion, and flyash is the main solid waste that the coal-burning power plant discharges.The main oxides of power plants flyash consists of: SiO
2, Al
2O
3, FeO, Fe
2O
3, CaO, TiO
2Deng.
Be called slag through the ore resistates after refining, in cement the blending and in commerical ready-mixed concrete, add, cement consumption in slag micropowder equivalent substitution various uses concrete and the cement products can significantly improve the over-all properties of concrete and cement products.
Tuff is that a kind of volcanoclastic rock draws, and composition mainly is a volcanic ash, and appearance is loose porous, and is coarse, and bedding is arranged, and color is various, and black, purple, redness, white, light green etc. are arranged, and can improve physical strength.
Slag, a kind of industrial solid wastes, the slag that steel-making is discharged is divided into converter slag, open hearth slag, electric furnace slag according to the type of furnace.Slag mainly is made up of the oxide compound of calcium, iron, silicon, magnesium and small amount of aluminum, manganese, phosphorus etc.Main mineral facies are the Solid solution that the oxide compound of tricalcium silicate, Dicalcium Phosphate (Feed Grade), monticellite, calcium manganolite, iron calcium aluminate and silicon, magnesium, iron, manganese, phosphorus forms, and also contain small-amount free calcium oxide and metallic iron, fluorapatite etc.
The redispersable latex powder product is water-soluble redispersible powder, is the multipolymer of ethylene/vinyl acetate, vinyl acetate between to for plastic/tertiary monocarboxylic acid ethylene copolymer, and acrylic acid multipolymer or the like as protective colloid, has high viscosifying power and particular performances with polyvinyl alcohol.
Described tuff micro mist, slag micro powder starting material can partly or entirely substitute flyash, slag micropowder.The specific surface area of the two is 400 ~ 500 m
2/ kg.
Beneficial effect of the present invention:
1, ferro-alloy cinder mechanism artificial sand not only can replace natural bluestone floor sand, quartz sand, and has that unit weight is little, the ever-increasing performance of later strength; This mortar more is applicable to the steam-cured environment of High Temperature High Pressure simultaneously, and anti-folding, the compressive property of mortar is more superior under this environment;
2, ferro-alloy cinder mechanism artificial sand volume in common dry-mixed mortar is 50~75%, has substituted natural bluestone floor sand, quartz sand fully.To produce 500000 tons of common dry-mixed mortars per year is example, can consume the melting waste slag of 25 ~ 350,000 tons of accumulations, has reduced the consumption to natural resource;
3, ferro-alloy cinder mechanism artificial sand is produced common dry-mixed mortar because its volume height makes dry-mixed mortar ton production cost reduce by 10~20 yuan, has improved economic benefit;
4, the specific surface area of employed slag micropowder, tuff micro mist and slag micro powder has been carried out strict control, made it fill enhancement and reach a reasonable effect;
5, realize the industrial residue comprehensive utilization, solve that the farmland takies, problem of environmental pollution, reach and build resource-conserving, environmentally friendly and realize the national economic development target of Sustainable development.
Embodiment
For a better understanding of the present invention, further specify below in conjunction with specific embodiment.
Embodiment 1:
A kind of doing mixed masonry mortar, and the weight proportion of mortar is: cement: coarse sand: medium sand: fine sand: flyash: slag micro powder: ether of cellulose=10:25:18:30:8:9:0.03, the aqueous solution of ether of cellulose 2% is 100000 centipoises 20 ℃ of viscosity.Cement is 32.5 of Shandong scenery with hills and waters Cement Group production
#Ordinary Portland cement, flyash are the secondary ash of Jinan Huang Tai power plant emission.Above-mentioned material by its weight ratio on the dry-mixed mortar production line of Ji'nan Yongquan New Building Material Co., Ltd. through mixing and stirring, make label and be doing of DMM15 and mix masonry mortar.
Every performance of measuring mortar sees Table 1.
Embodiment 2:
A kind of dry-mixed plastering mortar, the weight proportion of mortar is: cement: medium sand: fine sand: tuff micro mist: slag powders: ether of cellulose=12:35:37:8:8:0.03, the aqueous solution of ether of cellulose 2% is 150000 centipoises 20 ℃ of viscosity.Cement is 32.5 of Shandong scenery with hills and waters Cement Group production
#Ordinary Portland cement, slag powders are that Ji'nan Yongquan New Building Material Co., Ltd. produces.Above-mentioned material by its weight ratio on the dry-mixed mortar production line of Ji'nan Yongquan New Building Material Co., Ltd. through mixing and stirring, make the dry-mixed plastering mortar that label is DPM15.
Every performance of measuring mortar sees Table 1.
Embodiment 3:
A kind of doing mixed terrace mortar, the weight proportion of mortar is: cement: coarse sand: medium sand: fine sand: flyash: slag powders: tuff micro mist: slag micro powder: ether of cellulose=20:20:25:20:4:3:4:4:0.03, the aqueous solution of ether of cellulose 2% is 110000 centipoises 20 ℃ of viscosity.Cement is 32.5 of Shandong scenery with hills and waters Cement Group production
#Ordinary Portland cement, flyash are the secondary ash of Jinan Huang Tai power plant emission, and slag powders is that Ji'nan Yongquan New Building Material Co., Ltd. produces.Above-mentioned material by its weight ratio on the dry-mixed mortar production line of Ji'nan Yongquan New Building Material Co., Ltd. through mixing and stirring, make label and be doing of DSM20 and mix terrace mortar.
Every performance of measuring mortar sees Table 1.
Embodiment 4:
A kind of doing mixed masonry mortar, the weight proportion of mortar is: cement: coarse sand: medium sand: fine sand: flyash: slag powders: tuff micro mist: slag micro powder: ether of cellulose=8:30:10:10:3:7:2:8:0.03, the aqueous solution of ether of cellulose 2% is 120000 centipoises 20 ℃ of viscosity.Cement is 32.5 of Shandong scenery with hills and waters Cement Group production
#Ordinary Portland cement, flyash are the secondary ash of Jinan Huang Tai power plant emission.Above-mentioned material by its weight ratio on the dry-mixed mortar production line of Ji'nan Yongquan New Building Material Co., Ltd. through mixing and stirring, make label and be doing of DMM15 and mix masonry mortar.
Every performance of measuring mortar sees Table 1.
Embodiment 5:
A kind of doing mixed terrace mortar, and the weight proportion of mortar is: cement: coarse sand: medium sand: fine sand: slag powders: tuff micro mist: ether of cellulose=25:40:20:20:5:5:0.03, the aqueous solution of ether of cellulose 2% is 130000 centipoises 20 ℃ of viscosity.Cement is 32.5 of Shandong scenery with hills and waters Cement Group production
#Ordinary Portland cement, flyash are the secondary ash of Jinan Huang Tai power plant emission, and slag powders is that Ji'nan Yongquan New Building Material Co., Ltd. produces.Above-mentioned material by its weight ratio on the dry-mixed mortar production line of Ji'nan Yongquan New Building Material Co., Ltd. through mixing and stirring, make label and be doing of DSM20 and mix terrace mortar.
Every performance of measuring mortar sees Table 1.
Embodiment 6:
A kind of doing mixed terrace mortar, the weight proportion of mortar is: cement: coarse sand: medium sand: fine sand: flyash: slag powders: tuff micro mist: slag micro powder: ether of cellulose: redispersable latex powder=20:20:25:20:4:3:4:4:0.03:3, the aqueous solution of ether of cellulose 2% is 110000 centipoises 20 ℃ of viscosity.Cement is 32.5 of Shandong scenery with hills and waters Cement Group production
#Ordinary Portland cement, flyash are the secondary ash of Jinan Huang Tai power plant emission, and slag powders is that Ji'nan Yongquan New Building Material Co., Ltd. produces.Above-mentioned material by its weight ratio on the dry-mixed mortar production line of Ji'nan Yongquan New Building Material Co., Ltd. through mixing and stirring, make and do to mix terrace mortar.
Every performance of measuring mortar sees Table 1.
The mortar performance contrast table of table 1 embodiment 1-6 preparation
Autoclaved condition is: reaching after the corresponding length of time with pressure is the water vapour of 2.0MPa, steams to press and surveys its intensity after 6 hours.
Analyze embodiment 1~6 and utilize the ferro-alloy cinder artificial sand to mix masonry mortar, dry-mixed plastering mortar and do the mixed every superior performance of terrace mortar as doing of feedstock production, particularly its 7 days, 28 days ultimate compression strength is more superior under the High Temperature High Pressure making condition.Its every performance index of common dry-mixed mortar of each embodiment preparation have all surpassed the requirement of common dry-mixed mortar industry standard.Embodiment 6 is with respect to embodiment 3,3 parts of re-dispersible glue powders have just been added more, but shortened 0.67 hour time of coagulation, water retention increases one percentage point, ultimate compression strength and steaming pressure degree all improve a lot, illustrate that redispersable latex powder uses, and can reach better effect in this system.
Redispersable latex powder disperses the back film forming as second kind of tackiness agent performance enhancement, protective colloid is absorbed by mortar, can do not fallen after the film forming by water destruct, film forming fluoropolymer resin is as in strongthener distribution and the whole mortar, thereby increased the force of cohesion of mortar, improved workability, improving liquidity can, increase thixotroping and the anti-property of hanging down, improve force of cohesion; Prolong the open hour, strengthen water-retentivity.The effect of redispersable latex powder after mortar solidifies: improve tensile strength, increase bend resistance intensity, reduce Young's modulus, improve deformability, increase the material degree of compactness, increase abrasive wear resistance, improve cohesive strength, reduce carbonation depth, reduce the material water-absorbent.