CN1314617C - High-energy delay expanding agent for closed concrete and its prepn - Google Patents

High-energy delay expanding agent for closed concrete and its prepn Download PDF

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CN1314617C
CN1314617C CNB2005100194775A CN200510019477A CN1314617C CN 1314617 C CN1314617 C CN 1314617C CN B2005100194775 A CNB2005100194775 A CN B2005100194775A CN 200510019477 A CN200510019477 A CN 200510019477A CN 1314617 C CN1314617 C CN 1314617C
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porous
mgo
anhydrite
cao
slag
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CN1772692A (en
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胡曙光
丁庆军
王红喜
吕林女
何永佳
彭艳周
邹定华
王发洲
曹传林
马立军
周明凯
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Wuhan University of Science and Engineering WUSE
Wuhan University of Technology WUT
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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Abstract

The present invention relates to expanding agent having high-energy expansion-delayed action of closed cement concrete and a preparation method thereof. The high-energy expansion-delayed agent for closed concrete is characterized in that the high-energy expansion-delayed agent is prepared by mixing sulphoaluminate slat cement ripe material, steel slag, CaO, MgO, anhydrite, porous mineral powder and porous material; the present invention has the quality proportions of the compounds that the sulphoaluminate slat cement ripe material: the steel slag: the CaO: the MgO: the anhydrite: the porous mineral powder: the porous material = from 20 to 35 percent: from 10 to 20 percent: from 3 to 8 percent: from 3 to 8 percent: from 20 to 35 percent: from 5 to 10 percent: from 5 to 10 percent; the sum of the compounds is 100 percent. The expanding agent has the advantages of high efficiency, short expansion time, low alkali content, high strengthening effect, low cost and simple technology. When the mixing quantity of the expanding agent is from 10 to 18 percent of the total use quantity of cementing material. The expanding agent prepares from 2.0 to 5.0MPa self-stress for the closed concrete. The 14d expansion-limited rate of the expanding agent is from 0.03 to 0.05 percent, and the 90d expansion-limited rate is from 0.02 to 0.04 percent and is stable.

Description

A kind of closed concrete high energy delayed expansion agent and preparation method thereof
Technical field
The invention belongs to cement expansive material, be specifically related to a kind of swelling agent that cement concrete under the sealing condition is had high energy delayed expansion function and preparation method thereof.
Background technology
Expansive concrete under the sealing condition of development and engineering application at present, centre expansive concrete as steel pipe high strength expansive concrete, mass concrete engineering, its expansion character generally is to realize by swelling agents such as admixture UEA, CAS in concrete, because these swelling agent hydration times relatively early, and expansion sources is single, expansion performance to closed concrete is not high, and the expansion time mainly shows as in early days; On the basis of UEA, CAS swelling agent, introduce many expansion sources swelling agent of MgO component in addition, expectation remedies UEA, CAS only early expansion and the not high defective of rate of expansion, but because concrete is under this special conditions of enclosed environment, outside moisture can't enter and replenish the moisture that consumes owing to hydrated cementitious, thereby in the agent of hydrated cementitious late expansion owing to lack the required moisture of reaction and hydration reaction can not take place and produce expansion component, can not produce the post compensation contraction to closed concrete, i.e. delayed expansion effect.So existing swelling agent can be not high at closed concrete sclerosis early expansion, and its swelling capacity of later stage is not enough again, can not produce omnidistance prolonged expansion in course of hardening, thereby causes the later stage concrete to occur shrinking.This then can directly cause the unsticking of concrete and steel pipe walls to the concrete filled steel tube engineering, influences the stability and the security of whole engineering structure; For mass concrete, then can produce tensile stress in the concrete central inner, cracking then can appear when the tensile strength of mass concrete overcomes this tensile stress inadequately.
Summary of the invention
The object of the present invention is to provide a kind of swelling agent that can produce high energy delay microdilatancy effect to the concrete under sealing condition and preparation method thereof.
To achieve these goals, technical scheme of the present invention is: the agent of closed concrete high energy delayed expansion, it is mixed by sulphoaluminate cement clinker, slag, CaO, MgO, anhydrite, porous breeze and porous material, its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=(20～35%): (10～20%): (3～8%): (3～8%): (20～35%): (5～10%): (5～10%), each component sum are 100%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; MgO/ in the slag (FeO+MnO)＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is natural or artificial anhydrite; The porous breeze be porosity be the coal gangue of 30～40% natural porous zeolite or 650 ℃～800 ℃ of calcination pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is the natural or artificial aggregate of porous, and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
The preparation of one of following two kinds of methods is adopted in the agent of closed concrete high energy delayed expansion:
1, the preparation method of closed concrete high energy delayed expansion agent comprises the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; MgO/ in the slag (FeO+MnO)＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is natural or artificial anhydrite; The raw material of porous breeze is that porosity is 30～40% the natural porous zeolite or the coal gangue of 650 ℃～800 ℃ of calcination, and its water demand ratio is more than 120%; Porous material is the natural or artificial aggregate of porous, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=(20～35%): (10～20%): (3～8%): (3～8%): (20～35%): (5～10%): mix (5～10%), homogenizing, adorns bag at last, seals up for safekeeping.
2, the preparation method of closed concrete high energy delayed expansion agent comprises the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; MgO/ in the slag (FeO+MnO)＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is natural or artificial anhydrite; The raw material of porous breeze is that porosity is 30～40% the natural porous zeolite or the coal gangue of 650 ℃～800 ℃ of calcination, and its water demand ratio is more than 120%; Porous material is the natural or artificial aggregate of porous, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). by the each component mass percent be: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=(20～35%): (10～20%): (3～8%): (3～8%): (20～35%): (5～10%): (5～10%) weighing material; 3). with sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze mix, grinding is to specific surface area 〉=280m 2/ kg; 4). porous material is broken for 5～9mm particle diameter particle, and the independent grinding of slag to specific surface area is 400～500m 2/ kg; 5). at last with mix between step 3) and the step 4) gained material, homogenizing, adorn bag at last, seal up for safekeeping.
The high energy delayed expansion principle of closed concrete high energy delayed expansion agent is as follows:
Sulphoaluminate cement clinker and anhydrite can carry out following reaction immediately under the effect of water:
In fact, as long as calcium ion, aluminate and the sulfate ion of proper concn are arranged in the solution, just can form ettringite.In the ordinary course of things, aluminate ion is by C 4A 3SC 3A, CA, C 12A 7, CA 2Two water anhydrites or do not have water anhydrite and provide sulfate ion, C are provided Deng calcium aluminate 2The S aquation provides calcium ion; And anhydrous calcium sulphoaluminate (3CaO3Al 2O 3CaSO 4) then can provide above-mentioned various ion simultaneously.When CaO concentration in the liquid phase is low, Al 2O 3Equilibrium concentration is higher, and the degree of supersaturation during ettringite (AFt) crystallization is little, and crystallization is slow, and crystalline form is bigger, and away from original solid phase surface, separates out with dispersed; Then opposite when CaO concentration reaches capacity in the liquid phase, the very fast reunion of ettringite separates out and grows into gradually sturdy xln radially at original solid phase surface with fine crystals.These two kinds of ettringite all have the slurry of making expansible ability, but the former disperses to be filled in the space of original water-filling, and the latter is a support with original solid phase, and overlap joint intersected with each other just has more significant swelling capacity.There is enough basicity to keep AFt kind form generation later in the swelling agent aquation of the present invention, thereby has dynamical swelling capacity.
Through the CaO of 900 ℃～1100 ℃ of calcination and the MgO of 1100 ℃～1200 ℃ of calcination, wherein the most of hydration reaction of CaO occurs in the early stage of concrete system aquation, the mid-term of the most of hydration reaction generation of MgO concrete system aquation; RO mutually can be so that swelling agent has the late expansion performance in the slag, this mainly produces under 1500 ℃～1700 ℃ conditions owing to its RO, its heating power history decision Mg, Ca phase hydration activity are lower, but after its specific surface area reaches certain numerical value, its hydration activity can be improved, therefore special stipulation of the present invention the specific surface area of steel-making slag powder, guarantee that the hydration reaction of slag RO phase occurs in the concrete hardening later stage.For AFt, CaO in this invention system, MgO, RO as expansion sources, difference of time has guaranteed that this swelling agent can prolonged expansion thereby it expands, because it is early stage that the generation of AFt and CaO hydration reaction mainly occur in the aquation of concrete system, and the magnesian hydration reaction time of expanding can be thought in mid-term, the hydration reaction of the RO phase time of expanding then can be thought in the later stage, utilize the difference of three kinds of hydration reaction speed, adjust rate of expansion, thereby arrive sustainable expansible function.CaO, MgO, RO phase chemistry reaction equation are as follows:
CaO+H 2O＝Ca(OH) 2
MgO+H 2O＝Mg(OH) 2
An important composition porous material is porous breeze and porous material among the present invention, plays the effect at a water source " depot " in the expansive concrete system.Because use pumping technology in the expansive concrete construction process, free water and porous material are in high pressure conditions under sealing condition, make zeolite powder, porous material be in super water saturation state.Because its porous breeze, special separately specific surface area and the pore structure of porous material make the porous breeze improve concrete degree of compactness as micro-aggregate in early days in concrete hardening, promote concrete degree of compactness; And the concrete hardening later stage, since in the concrete system in the water mudrock structure water of pore constantly consumed, pore produces negative pressure, form pressure difference with hydraulic pressure in the porous material hole, make free water in the porous material hole enter pore and provide reaction water for cement expansive material continues aquation, produce the delayed expansion effect, solved and be in that concrete under the sealing condition can't obtain external water source and the problem that can't finish late expansion, can effectively administer the concrete filled steel tube late expansion can be not enough, mass concrete shrinks late period and actual engineering roadblock such as cracking.
The advantage that this high energy postpones airtight cement expansive material is that expansion performance height, expansion time are long, and alkali content is low, enhancing, cost is low, production technique is simple.This expansive agent dosage accounts for total gel material content 10～18% o'clock, can to closed concrete produce 2.0～5.0MPa from stress, its 14 days limited expansion rates: 0.03～0.05%; 90d limited expansion rate 0.02～0.04% also begins to stablize.
Embodiment
Example 1: closed concrete high energy delayed expansion agent, it is mixed by sulphoaluminate cement clinker, slag, CaO, MgO, anhydrite, porous breeze and porous material, and its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=30%: 15%: 5%: 5%: 30%: 5%: 10%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is a natural anhydrite; The porous breeze be porosity be 30～40% natural porous zeolite pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is porous aggregate (as a leca), and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3Tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
The preparation method of above-mentioned closed concrete high energy delayed expansion agent comprises the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is a natural anhydrite; The raw material of porous breeze is that porosity is 30～40% natural porous zeolite, and its water demand ratio is more than 120%; Porous material is porous aggregate (as a leca), and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=30%: 15%: 5%: 5%: 30%: 5%: 10% mix, homogenizing, adorn bag at last, seal up for safekeeping.
The index of this closed concrete high energy delayed expansion agent is as follows: volume accounts for total gel material content 10～18% o'clock, 14d limited expansion rate: 0.03～0.05%; 90d limited expansion rate 0.02～0.04% also begins to stablize.
The agent of closed concrete high energy delayed expansion must be under the dry moistureproof condition, otherwise the inefficacy of can luming.
Its concrete application example sees Table 1.
Example 2: closed concrete high energy delayed expansion agent, it is mixed by sulphoaluminate cement clinker, slag, CaO, MgO, anhydrite, porous breeze and porous material, and its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=20%: 20%: 8%: 8%: 30%: 7%: 7%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is artificial anhydrite; The porous breeze be the coal gangue of 650 ℃～800 ℃ of calcination pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is porous aggregate (as a leca), and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
The preparation method of above-mentioned closed concrete high energy delayed expansion agent comprises the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is artificial anhydrite; The raw material of porous breeze is the coal gangue of 650 ℃～800 ℃ of calcination, and its water demand ratio is more than 120%; Porous material is the porous artificial aggregate, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=20%: 20%: 8%: 8%: 30%: 7%: 7% mix, homogenizing, adorn bag at last, seal up for safekeeping.
The index of this closed concrete high energy delayed expansion agent is as follows: volume accounts for total gel material content 10～18% o'clock, 14d limited expansion rate: 0.03～0.05%; 90d limited expansion rate 0.02～0.04% also begins to stablize.
The agent of closed concrete high energy delayed expansion must be under the dry moistureproof condition, otherwise the inefficacy of can luming.
Its concrete application example sees Table 2.
Example 3: closed concrete high energy delayed expansion agent, it is mixed by sulphoaluminate cement clinker, slag, CaO, MgO, anhydrite, porous breeze and porous material, and its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=30%: 10%: 3%: 7%: 30%: 10%: 10%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is a natural anhydrite; The porous breeze be porosity be 30～40% natural porous zeolite pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is porous aggregate (as a leca), and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
The preparation method of above-mentioned closed concrete high energy delayed expansion agent comprises the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is a natural anhydrite; The porous breeze is that porosity is 30～40% natural porous zeolite, and its water demand ratio is more than 120%; The raw material of porous material is porous collection (as a leca), and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=30%: 10%: 3%: 7%: 30%: 10%: 10% mix, homogenizing, adorn bag at last, seal up for safekeeping.
The index of this closed concrete high energy delayed expansion agent is as follows: volume accounts for total gel material content 10～18% o'clock, 14d limited expansion rate: 0.03～0.05%; 90d limited expansion rate 0.02～0.04% also begins to stablize.
The agent of closed concrete high energy delayed expansion must be under the dry moistureproof condition, otherwise the inefficacy of can luming.
Its concrete application example sees Table 3.
Example 4: closed concrete high energy delayed expansion agent, it is mixed by sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze (zeolite powder, coal gangue etc.) and porous material, slag, and its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=35%: 10%: 5%: 5%: 35%: 5%: 5%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is artificial anhydrite; The porous breeze be the coal gangue of 650 ℃～800 ℃ of calcination pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is porous aggregate (as a leca), and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
The preparation method of above-mentioned closed concrete high energy delayed expansion agent comprises the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is artificial anhydrite; The raw material of porous breeze is the coal gangue of 650 ℃～800 ℃ of calcination, and its water demand ratio is more than 120%; Porous material is the porous artificial aggregate, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=35%: 10%: 5%: 5%: 35%: 5%: 5% mix, homogenizing, adorn bag at last, seal up for safekeeping.
The index of this closed concrete high energy delayed expansion agent is as follows: volume accounts for total gel material content 10～18% o'clock, 14d limited expansion rate: 0.03～0.05%; 90d limited expansion rate 0.02～0.04% also begins to stablize.
The agent of closed concrete high energy delayed expansion must be under the dry moistureproof condition, otherwise the inefficacy of can luming.
Its concrete application example sees Table 4.
Example 5: closed concrete high energy delayed expansion agent, it is mixed by sulphoaluminate cement clinker, slag, CaO, MgO, anhydrite, porous breeze and porous material, and its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=35%: 20%: 3%: 7%: 20%: 10%: 5%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is a natural anhydrite; The porous breeze be porosity be 30～40% natural porous zeolite pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is the porous artificial aggregate, and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
The preparation method of above-mentioned closed concrete high energy delayed expansion agent, comprise the steps: the preparation method of closed concrete high energy delayed expansion agent, comprise the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; Slag RO phase K m(MgO/ (FeO+MnO))＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is a natural anhydrite; The porous breeze is that porosity is 30～40% natural porous zeolite, and its water demand ratio is more than 120%; The raw material of porous material is the porous artificial aggregate, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area (Blain specific surface) 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=35%: 20%: 3%: 7%: 20%: 10%: 5% mix, homogenizing, adorn bag at last, seal up for safekeeping.
The index of this closed concrete high energy delayed expansion agent is as follows: volume accounts for total gel material content 10～18% o'clock, 14d limited expansion rate: 0.03～0.05%; 90d limited expansion rate 0.02～0.04% also begins to stablize.
The agent of closed concrete high energy delayed expansion must be under the dry moistureproof condition, otherwise the inefficacy of can luming.
Its concrete application example sees Table 5.
Application example of the present invention:
High energy delayed expansion agent as closed concrete: in concrete, mix 10%～18% high energy delayed expansion agent, can obtain having the cement concrete material that fine mechanical property and high energy postpone the microdilatancy performance.The steps include: to weigh up cement, the agent of high energy delayed expansion, stone, sand, water, solid water reducing admixture FDN by metering earlier, pour into cement, the agent of high energy delayed expansion, stone, sand, solid water reducing admixture in the stirred vessel respectively then, dry mixing 30s mixes it, then water is poured into slowly and stirred 30s in the stirred vessel, pour out moulding after guaranteeing to stir, on shaking table, vibrate 30s, mark to support and after the length of time, test its intensity, limited expansion rate according to GB.Part of test results is as table 1-5.
Table 1 is mixed example 1 high energy delayed expansion agent closed concrete result of implementation
P.O42.5 # cement (Kg/m 3 ) High energy delayed expansion agent volume (Kg/m 3) W/ C Sand coarse aggregate ratio FDN 28d intensity (MPa) Limited expansion rate (%)
Example 1 Volume (％) (gelling material %) 14d 90d
300 30％∶15 ％∶5％∶5 ％∶30％∶5 ％∶10％ 0 0.46 39 0.8 35.3 -3.7 -5.0
270 30 0.46 39 0.8 36..0 3.5 2.0
255 45 0.46 39 0.8 36.6 4.2 2.1
246 54 0.46 39 0.8 35.3 4.4 2.4
350 0 0.43 40 0.8 40.1 -3.8 -4.7
315 35 0.43 40 0.8 41.1 3.0 2.3
298 52 0.43 40 0.8 42.0 3.6 2.5
287 63 0.43 40 0.8 40.0 3.8 2.6
400 0 0.40 40 1 45.1 -3.0 -4.8
360 40 0.40 40 1 46.5 3.2 2.6
340 60 0.40 40 1 45.7 4 3.1
328 72 0.40 40 1 44.2 4.1 3.4
460 0 0.39 40 1.1 50.1 -2.9 -4.3
414 46 0.39 40 1.1 52.3 3.1 2.4
391 69 0.39 40 1.1 52.5 3.8 2.8
377 83 0.39 40 1.1 50.2 4.6 3.3
520 0 0.33 39 1.3 58 -3.4 -4.5
468 52 0.33 39 1.3 58.7 3.4 3.2
442 78 0.33 39 1.3 57.0 4.5 3.3
426 94 0.33 39 1.3 55.5 4.9 4.0
Table 2 is mixed example 2 high energy delayed expansion agent closed concrete results of implementation
P.O42.5 # cement (Kg/m 3 ) High energy delayed expansion agent volume (Kg/m 3) W/ C Sand coarse aggregate ratio FDN 28d intensity (MPa) Limited expansion rate (%)
Example 2 Volume (％) (gelling material %) 14d 90d
300 20％∶20 ％∶8％∶8 ％∶30％∶7 ％∶7％ 0 0.46 39 0.8 34.5 -3.6 -5.1
270 30 0.46 39 0.8 35.1 3.7 2.2
255 45 0.46 39 0.8 35.5 4.4 2.8
246 54 0.46 39 0.8 35.0 4.8 3.4
350 0 0.43 40 0.8 40.4 -3.7 -4.8
315 35 0.43 40 0.8 41.4 3.5 2.5
298 52 0.43 40 0.8 42.1 3.8 2.7
287 63 0.43 40 0.8 40.5 4.0 3.1
400 0 0.40 40 1 44.7 -3.1 -4.8
360 40 0.40 40 1 45.9 3.0 2.4
340 60 0.40 40 1 46.7 4.1 3.0
328 72 0.40 40 1 45.2 4.6 3.5
460 0 0.39 40 1.1 50.2 -3.5 -5.3
414 46 0.39 40 1.1 52.8 3.2 2.4
391 69 0.39 40 1.1 53.1 4.0 3.2
377 83 0.39 40 1.1 51.0 4.6 3.5
520 0 0.33 39 1.3 58.1 -3.3 -4.4
468 52 0.33 39 1.3 58.9 4.0 3.2
442 78 0.33 39 1.3 57.3 4.6 3.3
426 94 0.33 39 1.3 55.7 4.7 3.4
Table 3 is mixed example 3 high energy delayed expansion agent closed concrete results of implementation
P.O42.5 # cement (Kg/m 3 ) High energy delayed expansion agent volume (Kg/m 3) W/ C Sand coarse aggregate ratio FDN 28d intensity (MPa) Limited expansion rate (%)
Example 2 Volume (％) (gelling material %) 14d 90d
300 30％∶10 ％∶3％∶7 ％∶30％∶ 10％∶10％ 0 0.46 39 0.8 35.3 -3.2 -4.9
270 30 0.46 39 0.8 35.0 3.1 2.0
255 45 0.46 39 0.8 35.2 3.4 2.1
246 54 0.46 39 0.8 34.9 4.0 2.5
350 0 0.43 40 0.8 41.0 -3.4 -4.5
315 35 0.43 40 0.8 41.4 3.3 2.2
298 52 0.43 40 0.8 42.6 3.8 2.5
287 63 0.43 40 0.8 40.3 4.4 3.2
400 0 0.40 40 1 45.8 -3.4 -4.4
360 40 0.40 40 1 47.6 3.5 2.6
340 60 0.40 40 1 46.5 4.8 3.5
328 72 0.40 40 1 45.3 4.9 3.7
460 0 0.39 40 1.1 50.5 -3.3 -5.1
414 46 0.39 40 1.1 52.6 3.7 2.9
391 69 0.39 40 1.1 52.7 4.2 3.1
377 83 0.39 40 1.1 50.9 4.6 3.6
520 0 0.33 39 1.3 58.4 -3.7 -4.9
468 52 0.33 39 1.3 58.9 4.1 3.1
442 78 0.33 39 1.3 58.0 4.3 3.0
426 94 0.33 39 1.3 56.5 4.4 3.5
Table 4 is mixed example 4 high energy delayed expansion agent closed concrete results of implementation
P.O42.5 # cement (Kg/m 3 ) High energy delayed expansion agent volume (Kg/m 3) W/ C Sand coarse aggregate ratio FDN 28d intensity (MPa) Limited expansion rate (%)
Example 4 Volume (％) (gelling material %) 14d 90d
300 35％∶10 ％∶5％∶5 ％∶35％∶5 ％∶5％ 0 0.46 39 0.8 35.6 -3 -4.7
270 30 0.46 39 0.8 35.3 3.3 2.2
255 246 45 0.46 39 0.8 35.5 3.6 2.3
54 0.46 39 0.8 35.2 4.2 2.7
350 0 0.43 40 0.8 42.0 -3.2 -4.3
315 35 0.43 40 0.8 42.4 3.5 2.4
298 52 0.43 40 0.8 43.6 4 2.7
287 63 0.43 40 0.8 41.3 4.6 3.4
400 0 0.40 40 1 45.4 -3.2 -4.2
360 40 0.40 40 1 47.2 3.7 2.8
340 60 0.40 40 1 46.6 5 3.7
328 72 0.40 40 1 45.5 5.1 3.9
460 0 0.39 40 1.1 51.0 -3.1 -4.9
414 46 0.39 40 1.1 51.6 3.9 3.1
391 69 0.39 40 1.1 52.0 4.4 3.3
377 83 0.39 40 1.1 51.8 4.8 3.8
520 0 0.33 39 1.3 58.1 -3.5 -4.7
468 52 0.33 39 1.3 60.0 4.3 3.3
442 78 0.33 39 1.3 57.8 4.5 3.2
426 94 0.33 39 1.3 57.3 4.6 3.7
Table 5 is mixed example 5 high energy delayed expansion agent closed concrete results of implementation
P.O42.5 # cement (Kg/m 3 ) High energy delayed expansion agent volume (Kg/m 3) W/ C Sand coarse aggregate ratio FDN 28d intensity (MPa) Limited expansion rate (%)
Example 5 Volume (％) (gelling material %) 14d 90d
300 35％∶20 ％∶3％∶7 ％∶20％∶10 ％∶5％ 0 0.46 39 0.8 36.7 -3.3 -5
270 30 0.46 39 0.8 36.4 3 1.9
255 45 0.46 39 0.8 36.6 3.3 2
246 54 0.46 39 0.8 36.3 3.9 2.4
350 0 0.43 40 0.8 43.1 -3.5 -4.6
315 35 0.43 40 0.8 43.5 3.2 2.1
298 52 0.43 40 0.8 44.7 3.7 2.4
287 63 0.43 40 0.8 42.4 4.3 3.1
400 0 0.40 40 1 46.5 -3.5 -4.5
360 40 0.40 40 1 48.3 3.4 2.5
340 60 0.40 40 1 47.7 4.7 3.4
328 72 0.40 40 1 46.6 4.8 3.6
460 0 0.39 40 1.1 52.1 -3.4 -5.2
414 46 0.39 40 1.1 52.7 3.6 2.8
391 69 0.39 40 1.1 53.1 4.1 3
377 83 0.39 40 1.1 52.9 4.5 3.5
520 0 0.33 39 1.3 59.2 -3.8 -5
468 52 0.33 39 1.3 61.1 4 3
442 78 0.33 39 1.3 58.9 4.2 2.9
426 94 0.33 39 1.3 58.4 4.3 3.4

Claims (3)

1. closed concrete high energy delayed expansion agent, it is characterized in that: it is mixed by sulphoaluminate cement clinker, slag, CaO, MgO, anhydrite, porous breeze and porous material, its each component mass percent is: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=20～35%: 10～20%: 3～8%: 3～8%: 20～35%: 5～10%: 5～10%, and the each component sum is 100%; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; MgO/ in the slag (FeO+MnO)＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is natural or artificial anhydrite; The porous breeze be porosity be the coal gangue of 30～40% natural porous zeolite or 650 ℃～800 ℃ of calcination pulverize, levigate to 〉=280m 2The powder of/kg, its water demand ratio is more than 120%; Porous material is the natural or artificial aggregate of porous, and particle size range is 5～9mm, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa.
2. the preparation method of closed concrete high energy delayed expansion as claimed in claim 1 agent is characterized in that: comprise the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; MgO/ in the slag (FeO+MnO)＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is natural or artificial anhydrite; The raw material of porous breeze is that porosity is 30～40% the natural porous zeolite or the coal gangue of 650 ℃～800 ℃ of calcination, and its water demand ratio is more than 120%; Porous material is the natural or artificial aggregate of porous, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). various raw materials are broken separately respectively, grinding, porous material is crushed in 5～9mm particle size range, and it is 400～500m that steel-making slag powder is milled to specific surface area 2/ kg, all the other grindings are to specific surface area 〉=280m 2/ kg; 3). by the each component mass percent be then: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=20～35%: 10～20%: 3～8%: 3～8%: 20～35%: 5～10%: 5～10% mix, homogenizing, adorn bag at last, seal up for safekeeping.
3. the preparation method of closed concrete high energy delayed expansion as claimed in claim 1 agent is characterized in that: comprise the steps: 1). choose sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze, porous material, slag; Wherein sulphoaluminate cement clinker mineral composition mass percent scope is: C 4A 3S:50～82%, C 4AF:3～13%, C 2S:5～37%; MgO/ in the slag (FeO+MnO)＞1; CaO is through 900 ℃～1100 ℃ calcination, and MgO is through 1100 ℃～1200 ℃ calcination; Anhydrite is natural or artificial anhydrite; The raw material of porous breeze is that porosity is 30～40% the natural porous zeolite or the coal gangue of 650 ℃～800 ℃ of calcination, and its water demand ratio is more than 120%; Porous material is the natural or artificial aggregate of porous, and porosity is 20～30%, and water-intake rate is 10～20%, apparent density 1200-1500kg/m 3, tap density 700-1100kg/m 3, cylindrical compress strength 〉=2.5MPa; 2). by the each component mass percent be: sulphoaluminate cement clinker: slag: CaO: MgO: anhydrite: the porous breeze: porous material=20～35%: 10～20%: 3～8%: 3～8%: 20～35%: 5～10%: 5～10% weighing materials; 3). with sulphoaluminate cement clinker, CaO, MgO, anhydrite, porous breeze mix, grinding is to specific surface area 〉=280m 2/ kg; 4). porous material is broken for 5～9mm particle diameter particle, and the independent grinding of slag to specific surface area is 400～500m 2/ kg; 5). at last with mix between step 3) and the step 4) gained material, homogenizing, adorn bag at last, seal up for safekeeping.
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CN102173700B (en) * 2010-12-31 2015-03-04 四川嘉华企业（集团）股份有限公司 Minimum inflation low heat silicate cement
CN103011655B (en) * 2012-12-11 2014-09-10 中建三局建设工程股份有限公司 High-strength concrete composite expanding agent for steel tube and preparation method thereof
CN103435317B (en) * 2013-08-16 2015-04-08 武汉理工大学 Compound expanding agent for inhibiting temperature rising in early stage and promoting hydration in later stage and preparation method thereof
CN104386938A (en) * 2014-10-30 2015-03-04 中冶天工集团有限公司 Multifunctional expanding agent for seamless construction of ultra-long concrete structure
CN107311497B (en) * 2016-12-26 2020-03-27 江苏苏博特新材料股份有限公司 Concrete internal curing type expanding agent and preparation method thereof
CN107827389B (en) * 2017-11-07 2020-01-24 四川佰汇混凝土工程有限公司 Preparation method of continuous stable expansion type expanding agent
CN107935504A (en) * 2017-11-27 2018-04-20 江西省萍乡市联友建材有限公司 Early strengthening and high strengthening, microdilatancy, the bar connecting sleeve grouting material of since conservation function

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