CN103524093A - Ultrahigh strength concrete - Google Patents
Ultrahigh strength concrete Download PDFInfo
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- CN103524093A CN103524093A CN201310371448.XA CN201310371448A CN103524093A CN 103524093 A CN103524093 A CN 103524093A CN 201310371448 A CN201310371448 A CN 201310371448A CN 103524093 A CN103524093 A CN 103524093A
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Abstract
The invention discloses ultrahigh strength concrete. The ultrahigh strength concrete is prepared from the following raw materials in weight content of active component in each cubic meter of concrete: 360-480kg/m<3> of ordinary portland cement, 50-100kg/m<3> of coal ash, 40-100kg/m<3> of phosphorus slag powder, 30-60kg/m<3> of silica fume, 1000-1100kg/m<3> of coarse aggregate, 600-700kg/m<3> of fine aggregate, 130-140kg/m<3> of water and 9-12kg/m<3> of naphthaline and polycarboxylic acid compound water reducer. Strength grade of the ultrahigh strength concrete is C100 and above, and each performance index of the ultrahigh strength concrete can meet the requirements of technical specification for application of ultrahigh strength concrete JGJ/T 281-2012. The phosphorus slag powder and the naphthaline and polycarboxylic acid compound water reducer are used for preparing the ultrahigh strength concrete, so that a related technical gap in China is filled; the phosphorus slag powder is used for preparing the ultrahigh strength concrete, hydration temperature rise of the concrete can be obviously delayed, and temperature difference cracks of high strength concrete and ultrahigh strength concrete are reduced; meanwhile, a better method for effectively utilizing the phosphorus slag powder and changing waste material into things of value is provided, and obvious economic benefit and social benefit are obtained.
Description
Technical field
The invention belongs to the technical field of material of construction, relate in particular to a kind of super high strength concrete that is mixed with phosphorus slag powder and naphthalene system and polycarboxylate composite water reducing agent.
Background technology
According to statistics, 1 ton of yellow phosphorus of every production can be discharged 8～10 tons of existing phosphorus slag output of phosphorus slag ，Yi China (approximately 100 tons/year) meter, and the annual emissions of phosphorus slag has reached 800～1000 tons.China most phosphorus production enterprise stacks phosphorus slag as waste residue, in the process of stacking, and the P in phosphorus slag
2o
5can under the shower of rainwater, permeate the ground and cause soil and groundwater to pollute with other objectionable constituent, also can produce radiocontamination simultaneously; And utilize the lateral reactivity of phosphorus slag, and using it as concrete adulterant, be to realize a kind of better method that phosphorus slag effectively utilizes, turns waste into wealth, there is significant economic benefit and social benefit.
The aquation that can postpone cement after phosphorus slag powder is incorporated in concrete, has delayed coagulation, can obviously reduce concrete aquation temperature rise.Phosphorus slag powder is incorporated in more high-strength, the super high strength concrete of gel material content, can significantly reduces concrete hydration heat, reduce temperature difference crack high-strength, super high strength concrete.
Using phosphorus slag powder as mineral admixture, during preparation C100 super high strength concrete, using separately high-efficiency water-reducing agent of poly-carboxylic acid easily to make concrete mix occur later sepn, excreting water phenomenon, is the C100 high-strength concrete that composite water reducer can make serviceability excellence and use poly carboxylic acid and naphthalene.
Current domestic use phosphorus slag powder is prepared to such an extent that strength grade of concrete is no more than C80, therefore uses the super high strength concrete of phosphorus slag powder preparation C100 and above strength grade to fill up domestic technological gap.
Summary of the invention
The object of the present invention is to provide a kind of preparation cost low, favorable working performance, intensity is high, the super high strength concrete that is mixed with phosphorus slag powder and naphthalene system and polycarboxylate composite water reducing agent that volume stability is good, the while can also reach the comprehensive utilization object of phosphorus slag powder.
The present invention proposes a kind of super high strength concrete, according to every cube of concrete content, the weight of each component (kg) is:
According to every cube of concrete content, each component preferably weight (kg) is:
Super high strength concrete described in the present invention, refers to that grade reaches the concrete of C100 and above strength grade.
In the present invention, described ordinary Portland cement is 52.5 grades of ordinary Portland cements.
In the present invention, described flyash is I level F class flyash.
In the present invention, SiO in described silicon ash
2content should be greater than 90%, and specific surface area should not be less than 15000m
2/ kg.
In the present invention, described phosphorus slag powder specific surface area should not be less than 400m
2/ kg, 28d activity index is not less than 70%.
In the present invention, coarse aggregate is the impact crushing stone of 5～20mm continuous grading, and ultimate compression strength should be not less than 130Mpa, and faller gill shape granule content is not more than 5%, and silt content is not more than 0.5%, and clod content is not more than 0.2%.
In the present invention, fine aggregate is fineness modulus 2.6～3.0Ⅱ district medium sands, and silt content and clod content are not more than respectively 2% and 0.5%.
In the present invention, composite water-reducing agent is naphthalene system and polycarboxylic acid series composite water-reducing agent, and wherein the ratio of naphthalene water reducer and polycarboxylate water-reducer is preferably that (0.5:9.5)～(1.5:8.5), preferably compositely proportional is 1:9; The solid content of composite water-reducing agent should be greater than 25%, and water-reducing rate is not less than 30%.
In the present invention, water is tap water or tap water, meets the requirement of " the reinforcement of concrete water quality standard " JGJ63.
In the present invention, use the object of phosphorus slag powder to be:
(1) phosphorus slag powder is the activated adulterant of a kind of tool, can significantly improve concrete workability, mechanical property and endurance quality.The aquation that can postpone cement after phosphorus slag powder is incorporated in concrete, has delayed coagulation, and this can obviously reduce concrete aquation temperature rise.Appropriate phosphorus slag powder is incorporated in the more C100 super high strength concrete of gel material content, not only can affect concrete intensity, and can significantly reduce concrete hydration heat, reduce temperature difference crack high-strength, super high strength concrete.
(2) phosphorus slag powder derives from waste---the phosphorus slag of producing yellow phosphorus, utilizes the lateral reactivity of phosphorus slag, using it as concrete adulterant, is to realize a kind of better method that phosphorus slag effectively utilizes, turns waste into wealth, and has significant economic benefit and social benefit.
In the present invention, use naphthalene system and the object of polycarboxylate composite water reducing agent to be: naphthalene water reducer belongs to alkaline water reducer, polycarboxylate water-reducer belongs to acid water reducer, if use both composite water reducers in the few middle weak concrete of gel material content, easily cause the water-reducing effect of composite water-reducing agent poor, concrete work performance variation.During preparation C100 super high strength concrete, gel material content is large, water reducer consumption is many, using separately high-efficiency water-reducing agent of poly-carboxylic acid easily to make concrete mix occur later sepn, excreting water phenomenon, is that composite water reducer can effectively address this problem and use poly carboxylic acid and naphthalene.
Embodiment
Below by specific embodiment, the invention will be further described.
Embodiment 1
Be mixed with a super high strength concrete for phosphorus slag powder and composite water-reducing agent, the component of every cube comprises: 52.5 grades of ordinary Portland cement 420kg, phosphorus slag powder 72kg, I level flyash 72kg, silicon ash 36kg, river sand 629kg, 5-20mm impact crushing stone 1070kg, composite water-reducing agent 11.1kg, water 140kg.Material on deck after, through forced mixer, stir 3min～4min, can make the concrete described in the present invention, concrete work performance is good, without segregation, excreting water phenomenon.
Embodiment 2
Be mixed with a super high strength concrete for phosphorus slag powder and composite water-reducing agent, the component of every cube comprises: 52.5 grades of ordinary Portland cement 408kg, phosphorus slag powder 54kg, I level flyash 90kg, silicon ash 48kg, river sand 646kg, 5-20mm impact crushing stone 1054kg, composite water-reducing agent 10.8kg, water 140kg.Material on deck after, through forced mixer, stir 3min～4min, can make the concrete described in the present invention, concrete work performance is good, without segregation, excreting water phenomenon.
Embodiment 3
Be mixed with a super high strength concrete for phosphorus slag powder and composite water-reducing agent, the component of every cube comprises: 52.5 grades of ordinary Portland cement 415kg, phosphorus slag powder 74kg, I level flyash 93kg, silicon ash 37kg, river sand 660kg, 5-20mm impact crushing stone 1033kg, composite water-reducing agent 10.5kg, water 136kg.Material on deck after, through forced mixer, stir 3min～4min, can make the concrete described in the present invention, concrete work performance is good, without segregation, excreting water phenomenon.
Embodiment 4
Be mixed with a super high strength concrete for phosphorus slag powder and composite water-reducing agent, the component of every cube comprises: 52.5 grades of ordinary Portland cement 408kg, phosphorus slag powder 60kg, I level flyash 90kg, silicon ash 48kg, river sand 663kg, 5-20mm impact crushing stone 1038kg, composite water-reducing agent 10.8kg, water 138kg.Material on deck after, through forced mixer, stir 3min～4min, can make the concrete described in the present invention, concrete work performance is good, without segregation, excreting water phenomenon.
Embodiment 5
Be mixed with a super high strength concrete for phosphorus slag powder and composite water-reducing agent, the component of every cube comprises: 52.5 grades of ordinary Portland cement 409kg, phosphorus slag powder 74kg, I level flyash 93kg, silicon ash 43kg, river sand 669kg, 5-20mm impact crushing stone 1024kg, composite water-reducing agent 11.2kg, water 136kg.Material on deck after, through forced mixer, stir 3min～4min, can make the concrete described in the present invention, concrete work performance is good, without segregation, excreting water phenomenon.
Embodiment 6
Be mixed with a super high strength concrete for phosphorus slag powder and composite water-reducing agent, the component of every cube comprises: 52.5 grades of ordinary Portland cement 432kg, phosphorus slag powder 48kg, I level flyash 84kg, silicon ash 36kg, river sand 623kg, 5-20mm impact crushing stone 1084kg, composite water-reducing agent 11.2kg, water 132kg.Material on deck after, through forced mixer, stir 3min～4min, can make the concrete described in the present invention, concrete work performance is good, without segregation, excreting water phenomenon.
The concrete mix of above-described embodiment 1～6 and properties of hardened concrete are tested, and result is as table 1.
| Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Slump divergence/mm | 10.6 | 9.2 | 7.8 | 9.5 | 8.7 | 11.3 |
| Be inverted slump cone emptying time/s | 630 | 650 | 680 | 660 | 670 | 600 |
| 28d ultimate compression strength/Mpa | 110.5 | 105.3 | 115.3 | 113.4 | 120.6 | 118.1 |
| 56d ultimate compression strength/Mpa | 118.6 | 116.2 | 121.4 | 120.5 | 127.1 | 126.6 |
As seen from the above table, the super high strength concrete that is mixed with phosphorus slag powder and composite water-reducing agent of the present invention, be inverted slump cone emptying time < 12s, slump divergence value >=600mm, 28d ultimate compression strength >=105Mpa, can meet the technical requirements of " pumping high-strength concrete " in " high-strength concrete utilisation technology rules " JGJ/T 281-2012.
Be mixed with phosphorus slag powder and naphthalene system and polycarboxylate composite water reducing agent super high strength concrete and have excellent serviceability and mechanical property, to promoting, New Building Materials develop and the application of trade waste is significant.
Finally explanation, above embodiment is only in order to illustrate technical scheme of the present invention.If those of ordinary skills modify or are equal to replacement technology example of the present invention, and do not depart from aim of the present invention, it all should be encompassed in claim scope of the present invention.
Claims (10)
1. a super high strength concrete, according to every cube of concrete content, the weight of each component (kg) is:
2. a kind of super high strength concrete according to claim 1, is characterized in that, according to every cube of concrete content, the weight of each component (kg) is:
3. a kind of super high strength concrete according to claim 1, is characterized in that: described silicate cement is 52.5 grades of ordinary Portland cements.
4. a kind of super high strength concrete according to claim 1, is characterized in that: described flyash is I level F class flyash.
5. a kind of super high strength concrete according to claim 1, is characterized in that: SiO in described silicon ash
2content is greater than 90%, and specific surface area is not less than 15000m
2/ kg.
6. a kind of super high strength concrete according to claim 1, is characterized in that: described phosphorus slag powder specific surface area is not less than 400m
2/ kg, 28d activity index is not less than 70%.
7. a kind of super high strength concrete according to claim 1, it is characterized in that: described coarse aggregate is the impact crushing stone of 5～20mm continuous grading, and ultimate compression strength is not less than 130Mpa, faller gill shape granule content is not more than 5%, silt content is not more than 0.5%, and clod content is not more than 0.2%.
8. a kind of super high strength concrete according to claim 1, is characterized in that: described fine aggregate is fineness modulus 2.6～3.0Ⅱ district medium sands, and silt content and clod content are not more than respectively 2% and 0.5%.
9. a kind of super high strength concrete according to claim 1, it is characterized in that: described composite water-reducing agent is naphthalene system and polycarboxylate composite water reducing agent, wherein the ratio of naphthalene water reducer and polycarboxylate water-reducer is 0.5:9.5 to 1.5:8.5, and preferably compositely proportional is 1:9; The solid content of composite water-reducing agent is greater than 25%, and water-reducing rate is not less than 30%.
10. a kind of super high strength concrete according to claim 1, is characterized in that: described water is tap water or tap water, meets the requirement of " the reinforcement of concrete water quality standard " JGJ63.
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|---|---|---|---|
| CN201310371448.XA CN103524093B (en) | 2013-08-22 | 2013-08-22 | A kind of super high strength concrete |
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| CN201310371448.XA CN103524093B (en) | 2013-08-22 | 2013-08-22 | A kind of super high strength concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622009A (en) * | 2015-12-23 | 2016-06-01 | 东南大学 | Silica fume-free ultra-high performance concrete matrix and preparation method thereof |
| CN111635206A (en) * | 2020-06-08 | 2020-09-08 | 张延年 | Impervious and carbonization-resistant solid waste concrete and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242015A (en) * | 2013-04-28 | 2013-08-14 | 三峡大学 | Phosphorus slag-doped active powder concrete and preparation method thereof |
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2013
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242015A (en) * | 2013-04-28 | 2013-08-14 | 三峡大学 | Phosphorus slag-doped active powder concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 麻秀星: "聚羧酸系与萘系减水剂复配用于高性能混凝土", 《新型建筑材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622009A (en) * | 2015-12-23 | 2016-06-01 | 东南大学 | Silica fume-free ultra-high performance concrete matrix and preparation method thereof |
| CN111635206A (en) * | 2020-06-08 | 2020-09-08 | 张延年 | Impervious and carbonization-resistant solid waste concrete and preparation method thereof |
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| CN103524093B (en) | 2015-09-02 |
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