CN102659363A - Light high-strength concrete and preparation method thereof - Google Patents
Light high-strength concrete and preparation method thereof Download PDFInfo
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Abstract
The invention discloses light high-strength concrete, which is prepared from the following raw materials in percentage by weight: 10 to 15 percent of silicate cement, 8 to 12 percent of mineral powder, 6 to 10 percent of coal ash, 2 to 6 percent of wollastonite, 20 to 30 percent of ceramsite,25 to 35 percent of ceramic sand, 0.2 to 0.8 percent of high-performance water reducing agent, 0.05 to 0.3 percent of exciting agent, 0.05 to 0.8 percent of tackifier and 8 to 12 percent of water. The light high-strength concrete has the advantages that compact accumulation is realized by optimizing the grain composition of cementing materials; the mineral powder is subjected to ultrafine grinding, so that the hydrated activity of the mineral powder is improved substantially; and the using quantity of the low-density cementing materials can be increased, and the cohesiveness of slurry is improved by combining the high-performance water reducing agent, the exciting agent and the tackifier, so that the concrete slurry is high in working performance and is not segregable, and the aim of reducing the volume weight of the hardened slurry substantially is fulfilled on the basis of ensuring the mechanical property of the hardened slurry.
Description
Technical field
The present invention relates to a kind of concrete and compound method thereof, is a kind of light high strength concrete and compound method thereof specifically.
Background technology
Light high strength concrete (HSLC) is one of developing direction of present world concrete technology, advantage such as have high-strength light, good endurance, no alkali-aggregate reaction, volume stability is good, thermal and insulating performance is good.The U.S., Germany, Japan and other countries are widely used in HSLC in the engineerings such as maritime works's structures, Highrise buildings, Longspan Bridge and urban interchange.
China starts late to the research of light high strength concrete, owing to receive the constraint of aglite self intensity, concrete intensity is difficult to improve; Improving concrete intensity through the increase cement consumption can cause concrete unit weight to rise again; And because light skeletal is easy to come-up, concrete is emanated easily, causes the discreteness of concrete strength decline and unit weight and intensity to increase.Therefore, mostly the light high strength concrete of China's preparation is the low in prepared in laboratory, and this concrete is not easy to transportation and builds, for large-scale promotion is brought certain degree of difficulty.
Summary of the invention
Goal of the invention:, the object of the present invention is to provide that a kind of unit weight is low, intensity is high and favorable working performance, light high strength concrete and compound method thereof that discreteness is little to the deficiency of above-mentioned prior art.
Technical scheme: for solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of light high strength concrete, mainly process: silicate cement 10～15% by the starting material of following weight percent; Breeze 8～12%; Flyash 6～10%; Silicon ash 2～6%; Haydite 20～30%; Pottery sand 25～35%; High-performance water reducing agent 0.2～0.8%; Exciting agent 0.05-0.3%; Tackifier 0.05-0.8%; Water 8～12%.
In the above-mentioned starting material, silicate cement, breeze, flyash and silicon ash are the required gelling material of light high strength concrete of the present invention.
Wherein, said silicate cement is a PI52.5 cement, and its specific surface area is 390m
2/ kg, 28d ultimate compression strength 59Mpa.Because the density of cement is bigger, selects for use the high cement of intensity can reduce the ratio of cement in gelling material, helps improving concrete intensity, reduces concrete proportion.
Wherein, said breeze is the breeze through superfine pulverizing, and its specific surface area is 650m
2/ kg.Breeze through superfine pulverizing can be realized better filling to gelling system, and specific surface area is 650m
2The breeze activity of/kg is very high, and activity index has reached 160%, selects for use super finely ground slag to help the raising of concrete strength.
Wherein, said flyash is I level flyash, its fineness (45um screen over-size) 7%.Select for use the flyash of particle size range between cement granules and mineral powder granular to help realizing the filling step by step of gelling material, increase concrete degree of compactness, thereby improve concrete intensity.
Wherein, said silicon ash is SiO
2Content is 94%, specific surface area is 25000m
2The silicon ash of/kg.Select for use the very large silicon ash of specific surface area to realize better filling, increase concrete degree of compactness, thereby improve concrete intensity the space in the gelling system.
Wherein, said haydite is a broken stone type haydites of book structure, and its density rating 800, particle diameter are at 5-20mm, and cylindrical compress strength is 6.9Mpa.Select the more broken stone type haydites of book structure of surperficial corner angle for use; Being meshing with each other between the haydite capable of using alleviates the concrete disintegration that causes owing to the density difference between haydite and the glue material, and density rating is lower, cylindrical compress strength is higher is the basis of preparation light high strength concrete.
Wherein, the tap density of said pottery sand is 630kg/m
3, apparent density is 1390kg/m
3The pottery sand lower with density substitutes natural sand, can be effectively than the unit weight of low concrete.
Wherein, said high-performance water reducing agent is that the model that Suzhou Fu Ke Science and Technology Ltd. is produced is one or more of 8H, 5H, 9H polyocarboxy acid type high-performance water reducing agent.Select for use this water reducer can improve the concrete slump and flowing property.
Wherein, said exciting agent is one or more in trolamine, diethylolamine, tri-isopropanolamine, sodium sulfate, water glass, the Sodium Silicofluoride 98min.Select for use this kind exciting agent can fully excite the reactive behavior of breeze, flyash, silicon ash, can improve concrete intensity, and can reduce the consumption of cement, reduce concrete unit weight, thereby reach the purpose of high-strength light.
Wherein, said tackifier are one or several in Walocel MT 20.000PV ether, SEPIGEL 305, the ROHM.Select for use this tackifier can effectively increase the viscosity of concrete mix, reduce concrete isolating possibility takes place.
Above-mentioned light high strength concrete compound method, this method comprises the steps:
(1) haydite and pottery sand are soaked 24h in water, make its fully full water, obtain haydite and pottery sand behind the full water;
(2) tackifier are added in the entry, water temperature is heated to 60 ℃, stirs, it is fully dissolved, be mixed with tackifier solution;
(3) high performance water reducing agent of polyocarboxy acid, exciting agent and above-mentioned tackifier solution are added in the entry, stir, it is fully dissolved, be mixed with the aqueous solution;
(4) haydite and the pottery sand that will satisfy behind the water add in the stirrer;
(5) cement, breeze, flyash and silicon ash are added in the stirrer;
(6) aqueous solution and the surplus water that step (3) are obtained add in the stirrer;
(7) open stirrer, stir 1min, make various material mixing even, obtain said light high strength concrete.
Beneficial effect: compared with prior art, advantage of the present invention is: through optimizing the grain composition of gelling material, realize tightly packed; Through breeze is carried out superfine pulverizing, the hydration activity of breeze is increased substantially; Compound use through high-performance water reducing agent and exciting agent, tackifier; Can increase the consumption of low density gelling material (breeze, flyash, silicon ash); Promote glutinous the gathering property (slurry has good parcel performance to light skeletal, in ready mixed concrete, can't see the aggregate that spills slurry) of slurry, thereby reach the concrete mortar excellent working performance, do not emanate; And on the basis that guarantees the hardened paste mechanical property, reduce hardened paste unit weight purpose significantly.
Embodiment
Through concrete embodiment the present invention is further specified below; Should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the principle of the invention; Can also make some modification and improvement, these also should be regarded as belonging to protection scope of the present invention.
Embodiment 1: a kind of light high strength concrete, mainly process by the starting material of following weight percent:
Gelling material: PI52.5 cement 12%; Breeze 8%; Flyash 10%; Silicon ash 5%; Wherein, breeze, flyash, silicon ash belong to the low density gelling material;
Aggregate: haydites of book structure 25%; Pottery sand 30%;
Suzhou Fu Ke high performance water reducing agent of polyocarboxy acid that Science and Technology Ltd. produces 0.4% (wherein model is that 8H water reducer 0.2%, model are 5H water reducer 0.2%);
Exciting agent 0.1% (wherein mass concentration is 85% trolamine 0.05%, and mass concentration is 85% tri-isopropanolamine 0.03%, analytically pure Sodium Silicofluoride 98min 0.02%);
Walocel MT 20.000PV ether tackifier 0.05%,
Water 9.45%.
In above-mentioned each starting material, the specific surface area of PI52.5 cement is 390m
2/ kg, 28d ultimate compression strength 59Mpa; Breeze is the breeze through superfine pulverizing, and its specific surface area is 650m
2/ kg; Flyash is I level flyash, its fineness (45um screen over-size) 7%; The silicon ash is SiO
2Content is 94%, specific surface area is 25000m
2The silicon ash of/kg; Haydite is a broken stone type haydites of book structure, and density rating 800, particle diameter are at 5-20mm, and cylindrical compress strength is 6.9Mpa; The tap density of pottery sand is 630kg/m
3, apparent density is 1390kg/m
3
The compounding method of above-mentioned light high strength concrete is following: (1) is 25% haydites of book structure with weight percent; 30% pottery sand soaks 24h in water, make its fully full water; (2) with weight percent be 0.05% Walocel MT 20.000PV ether tackifier to add weight percent be in 1% the water, water temperature is heated to 60 ℃, stirs, it is fully dissolved, be mixed with tackifier solution; (3) be that 0.4% high performance water reducing agent of polyocarboxy acid, 0.1% exciting agent and the Walocel MT 20.000PV ether tackifier solution adding weight percent for preparing are in 2% water with weight percent, stir, it is fully dissolved, be mixed with the aqueous solution; (4) haydite and the pottery sand that will satisfy behind the water add in the stirrer; (5) with weight percent be 12% PI52.5 cement; 8% breeze; 10% flyash; 5% silicon ash adds in the stirrer; (6) aqueous solution and the weight percent that step (3) are obtained are that 6.45% water adds in the stirrer; (7) open stirrer, stir 1min, make various material mixing even, obtain light high strength concrete.
Embodiment 2: basic identical with embodiment 1, different is raw-material composition:
Gelling material: PI52.5 cement 11%; Breeze 8%; Flyash 8%; Silicon ash 5%;
Aggregate: haydites of book structure 28%; Pottery sand 30%;
Suzhou Fu Ke high performance water reducing agent of polyocarboxy acid that Science and Technology Ltd. produces 0.4% (wherein model is that 8H water reducer 0.2%, model are 5H water reducer 0.2%);
Exciting agent 0.09% (wherein mass concentration is 85% trolamine 0.05%, and mass concentration is 85% tri-isopropanolamine 0.02%, analytically pure Sodium Silicofluoride 98min 0.02%);
Walocel MT 20.000PV ether tackifier 0.1%
Water 9.41%.
The compounding method of above-mentioned light high strength concrete is following: (1) is 28% haydites of book structure with weight percent; 30% pottery sand soaks 24h in water, make its fully full water; (2) with weight percent be 0.1% Walocel MT 20.000PV ether tackifier to add weight percent be in 1% the water, water temperature is heated to 60 ℃, stirs, it is fully dissolved, be mixed with tackifier solution; (3) be that 0.4% high performance water reducing agent of polyocarboxy acid, 0.09% exciting agent and the Walocel MT 20.000PV ether tackifier solution adding weight percent for preparing are in 2% water with weight percent, stir, it is fully dissolved, be mixed with the aqueous solution; (4) haydite and the pottery sand that will satisfy behind the water add in the stirrer; (5) with weight percent be 11% PI52.5 cement; 8% breeze; 8% flyash; 5% silicon ash adds in the stirrer; (6) aqueous solution and the weight percent that step (3) are obtained are that 6.41% water adds in the stirrer; (7) open stirrer, stir 1min, make various material mixing even, obtain light high strength concrete.
Embodiment 3: basic identical with embodiment 1, different is raw-material composition:
Gelling material: PI52.5 cement 10%; Breeze 12%; Flyash 7%; Silicon ash 6%;
Aggregate: haydites of book structure 30%; Pottery sand 25%;
Suzhou Fu Ke high performance water reducing agent of polyocarboxy acid that Science and Technology Ltd. produces 0.4% (wherein model is a 8H water reducer 0.2%, and model is a 5H water reducer 0.1%, and model is a 9H water reducer 0.1%);
Exciting agent 0.14% (wherein mass concentration is 85% trolamine 0.05%, and mass concentration is 85% tri-isopropanolamine 0.04%, analytically pure diethylolamine 0.03%, analytically pure Sodium Silicofluoride 98min 0.02%);
SEPIGEL 305 tackifier 0.06%;
Water 9.4%.
The compounding method of above-mentioned light high strength concrete is following: (1) is 30% haydites of book structure with weight percent; 25% pottery sand soaks 24h in water, make its fully full water; (2) with weight percent be 0.1% SEPIGEL 305 tackifier to add weight percent be in 1% the water, water temperature is heated to 60 ℃, stirs, it is fully dissolved, be mixed with tackifier solution; (3) be that 0.4% high performance water reducing agent of polyocarboxy acid, 0.14% exciting agent and the SEPIGEL 305 tackifier solution adding weight percent for preparing are in 2% water with weight percent, stir, it is fully dissolved, be mixed with solution; (4) haydite and the pottery sand that will satisfy behind the water add in the stirrer; (5) with weight percent be 10% PI52.5 cement; 12% breeze; 7% flyash; 6% silicon ash adds in the stirrer; (6) aqueous solution and the weight percent that step (3) are obtained are that 6.4% water adds in the stirrer; (7) open stirrer, stir 1min, make various material mixing even, obtain light high strength concrete;
By embodiment 1 to 3 prepared light high strength concrete; Its each item physical and mechanical property index is as shown in the table: the following standard of concrete testing method foundation: lightweight aggregate concrete technology rules JGJ51-2002; Standard for test methods of mechanical properties of ordinary concrete GB/T50081-2002, Standard for test methods of properties of ordinary concrete mixture standard GB/T50081-2002.
●
Can find out that from table the equal ability of the light high strength concrete serviceability of using this kind method to prepare is good, apparent density is low, ultimate compression strength is high and discreteness is less.
The light high strength concrete that adopts this method to make has following advantage in actual use: (1) alleviates the structures own wt, if be used on the girder construction, can increase the span ability of beam; (2) for the bigger girder construction of span, can reduce depth of beam; (3) because its good impervious, anti-freezing property and do not have alkali-aggregate reaction can prolong the work-ing life of structures; (4) because its good working performance and lower discrete type, this kind concrete is easy to pumping construction, for the popularization of light high strength concrete has brought convenience.
Embodiment 4: basic identical with embodiment 1, different is raw-material composition:
PI52.5 cement 15%; Breeze 10%; Flyash 6%; Silicon ash 2%; Haydites of book structure 20%; Pottery sand 35%; High performance water reducing agent of polyocarboxy acid 0.2%; Exciting agent 0.05%; Walocel MT 20.000PV ether 0.75%; Water 12%; Wherein exciting agent is that mass concentration is 85% trolamine 0.05%, and mass concentration is 85% tri-isopropanolamine 0.03%, analytically pure sodium sulfate 0.02%.
Embodiment 5: basic identical with embodiment 1, different is raw-material composition:
PI52.5 cement 12%; Breeze 11%; Flyash 9%; Silicon ash 4%; Haydites of book structure 30%; Pottery sand 25%; High performance water reducing agent of polyocarboxy acid 0.2%; Exciting agent 0.3%; ROHM tackifier 0.5%; Water 8%; Wherein exciting agent is that mass concentration is 85% trolamine 0.05%, and mass concentration is 85% tri-isopropanolamine 0.03%, analytically pure water glass 0.02%.
Embodiment 6: basic identical with embodiment 1, different is raw-material composition:
PI52.5 cement 12%; Breeze 11%; Flyash 9%; Silicon ash 4%; Haydites of book structure 30%; Pottery sand 25%; High performance water reducing agent of polyocarboxy acid 0.8%; Exciting agent 0.15%; Walocel MT 20.000PV ether 0.05%; Water 8%; Wherein exciting agent is any in trolamine, diethylolamine, tri-isopropanolamine, sodium sulfate, water glass, the Sodium Silicofluoride 98min.
Claims (10)
1. a light high strength concrete is characterized in that, is mainly processed by the starting material of following weight percent: silicate cement 10～15%; Breeze 8～12%; Flyash 6～10%; Silicon ash 2～6%; Haydite 20～30%; Pottery sand 25～35%; High-performance water reducing agent 0.2～0.8%; Exciting agent 0.05-0.3%; Tackifier 0.05-0.8%; Water 8～12%.
2. light high strength concrete according to claim 1 is characterized in that: said silicate cement is a PI52.5 cement, and its specific surface area is 390m
2/ kg, 28 days ultimate compression strength 59Mpa.
3. light high strength concrete according to claim 1 is characterized in that: said breeze is the breeze through superfine pulverizing, and its specific surface area is 650m
2/ kg.
4. light high strength concrete according to claim 1 is characterized in that: said flyash is I level flyash, and its 45um screen over-size is 7%.
5. light high strength concrete according to claim 1 is characterized in that: said silicon ash is SiO
2Content is 94%, specific surface area is 25000m
2The silicon ash of/kg.
6. light high strength concrete according to claim 1 is characterized in that: said haydite is a broken stone type haydites of book structure, and its density rating 800, particle diameter are at 5-20mm, and cylindrical compress strength is 6.9Mpa; The tap density 630kg/m of said pottery sand
3, apparent density 1390kg/m
3
7. light high strength concrete according to claim 1 is characterized in that: said high-performance water reducing agent is the polyocarboxy acid type high-performance water reducing agent.
8. light high strength concrete according to claim 1 is characterized in that: said exciting agent is one or more in trolamine, diethylolamine, tri-isopropanolamine, sodium sulfate, water glass, the Sodium Silicofluoride 98min.
9. light high strength concrete according to claim 1 is characterized in that: said tackifier are one or several in Walocel MT 20.000PV ether, SEPIGEL 305, the ROHM.
10. the compound method of light high strength concrete according to claim 1 is characterized in that, this method comprises the steps:
(1) haydite and pottery sand are soaked 24h in water, make its fully full water, obtain haydite and pottery sand behind the full water;
(2) tackifier are added in the entry, water temperature is heated to 60 ℃, stirs, it is fully dissolved, be mixed with tackifier solution;
(3) high performance water reducing agent of polyocarboxy acid, exciting agent and above-mentioned tackifier solution are added in the entry, stir, it is fully dissolved, be mixed with the aqueous solution;
(4) haydite and the pottery sand that will satisfy behind the water add in the stirrer;
(5) cement, breeze, flyash and silicon ash are added in the stirrer;
(6) aqueous solution and the surplus water that step (3) are obtained add in the stirrer;
(7) open stirrer, stir 1min, make various material mixing even, obtain said light high strength concrete.
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