• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A concrete mix composition comprising a hydraulic binder comprising 35-45% by weight of ordinary Portland cement and 55-65% by weight of an adjunctitious cementitious material, aggregates and a water reducer, the water / binder ratio being 0.35-0 , 50 gross.
    公开号:AT517029A1
    申请号:T171/2015
    申请日:2015-03-24
    公开日:2016-10-15
    发明作者:Moussa Baalbaki；Bill Gong (Chunming)；David Babayan；Winnie Matthes
    申请人:Holcim Technology Ltd；
    IPC主号:
    专利说明:

    The invention relates to a concrete mix composition comprising a hydraulic binder and aggregates wherein the water / binder ratio is 0.35-0.50.
    Furthermore, the invention relates to a hydraulic binder for producing such a concrete mixture composition.
    Concrete is a very widely used construction material with high strength and good durability. In addition to aggregates and water, it also contains Portland cement as a hydraulic binder that produces strength-forming phases by solidification and curing in contact with water. Concrete based on Portland cement clinker is thus one of the most important binders worldwide.
    By adding various mineral supplements, e.g. granulated blast furnace slag (gbfs), fly ash, natural pozzolans, calcined clays or ground limestone to portland cement, Portland cement composite can be made with various properties. At the same time, the specific emission of CO2 in the production of cement is reduced by exchanging the said Portland cement additives because about 0.9 tonnes is produced during the production of Portland cement clinker by calcination of the raw materials and oxidation of the fuels in the rotary kiln C02 per ton of Portland cement clinker. The addition of additives to Portland cement has been an established practice for over 100 years and is governed by numerous cement and concrete standards.
    The mineral supplements, typically between 10 and 50% by weight of the total binder weight, are in most
    Applications ground granulated blast furnace slag, fly ash, pozzolans, ground limestone or mixtures thereof. It is known that increasing the level of supplemental cementitious materials in such composite binders adversely affects the development of the strength of hardened concrete.
    The water-to-binder ratio of a concrete composition is the ratio of the weight of the water to the weight of the hydraulic binder (including Portland cement and mineral additives) used in a concrete mix and having an important impact on the quality of the concrete being produced. For binders with an increased mineral additive level, a lower water to cement ratio is often used to increase strength and durability, which can make placing the mixture more difficult. Placement difficulties can be partially solved by the use of plasticizers or flow agents, but such additives greatly increase the cost.
    Various attempts have been made to obtain concrete admixture compositions with a high mineral content but without reducing the initial and late levels of compressive strength.
    CA 2809225 A1 describes a concrete composition comprising water (preferably 100-150 kg per cubic meter of concrete), Portland cement (preferably 18-89 kg per cubic meter of concrete) and secondary cementitious materials in an amount of 80% of the total binder. The resulting water-to-binder ratio is 0.35-0.45. The
    Binder composition comprises 5-30 wt% Portland cement, 0-20 wt% silica fume, 0-50 wt% fly ash, and 42-75 wt% blast furnace slag. The invention described in CA 28909225 A1 requires the use of ultra-fine reactive materials to achieve sufficiently high strength values which, in turn, can adversely affect the properties of the fresh concrete and increase the overall cost of the materials of the concrete. Further, for the concrete described in this patent, not a single specific benefit in terms of durability is mentioned.
    FR 2901268 A1 describes a premixed binder composition and a concrete having a reduced carbon footprint. This is achieved by optimizing the packing density of all components of the composition, from the ultra-fine binder particles to the aggregates. The use of highly reactive materials and the reduction of the water content in the concrete to very low water / cement ratios of 0.18 to 0.32 allow the development of high strength.
    Due to the very low water / cement ratio, the concrete described in this patent would exhibit relatively poor fresh concrete properties, unless costly high performance water reducers are used. Furthermore, the complexity of the binder composition and the use of many different components makes this invention difficult to realize in cement works. The very low water content of this concrete makes it difficult to implement in ready mix operations because of the high impact small variations in admixture dosage would have on the concrete properties, especially the properties of the fresh concrete. Variations that are typically in the accuracy range of units of measure, as in
    Ready-mixed concrete plants would significantly increase the variability of the properties of the fresh concrete, such as the initial slump and slump maintenance. For these reasons, the invention disclosed in FR 2901268 Al would prove difficult to achieve in ready mix operations and its total cost per cubic meter would be high.
    Therefore, it is an object of the present invention to provide a concrete mix composition which has both high initial and late values for compressive strength and high durability but does not require the use of low water-cement ratios or ultrafine reactive binder particles. Furthermore, essential properties of the fresh concrete, such as the initial slump and slump flow maintenance, should be very good.
    To overcome these and other objects, the invention is characterized in that the concrete mix composition comprises a hydraulic binder comprising 35-45% by weight of ordinary Portland cement and 55-65% by weight of a supplemental cementitious material, aggregates and a water reducer wherein the water / binder ratio is 0.35-0.50.
    Preferably, the concrete mix composition comprises substantially no other ingredients and therefore consists essentially of a hydraulic binder consisting of 35-45% by weight of ordinary Portland cement and 55-65% by weight of a supplemental cementitious material, aggregates and a water reducer the water / binder ratio is 0.35-0.50.
    It has been found that the combination of specific types of Portland cements with some complementary cementitious materials in a specific concrete mix scheme (with the narrow range of cement and supplemental cementitious material indicated above) results in surprisingly high strength values of the cured concrete, even at temperatures Winter conditions, and has very good properties of fresh concrete and excellent durability. In particular, the hydraulic binder comprises ordinary Portland cement and supplemental cementitious materials in a weight ratio of 2: 3.
    It has also been found that this high performance concrete does not require the use of materials known for their higher reactivity, such as ultrafine portland cement, ultrafine ground slag or silica fume. Instead, standard reactivity cement such as a CEM I 32.5N (according to the EN 197 classification of cements) is sufficient to achieve adequate strength in 24 hours.
    According to a preferred embodiment of the invention, ground granulated blast furnace slag is used as the sole supplementary cementitious material. However, other supplemental cementitious material compositions may also be used. For example, a mixture of ground granulated blast furnace slag and fly ash can be used as said supplemental cementitious material. Other supplemental cementitious materials such as pozzolans and ground limestone may also be used. Generally, the supplemental cementitious material may be ground granulated blast furnace slag, fly ash, pozzolans, ground limestone or mixtures thereof.
    The content of the supplemental cementitious material in the concrete mixing scheme is preferably between 160 and 230 kg per cubic meter of concrete. Preferably, 180 kg of the supplemental cementitious material per cubic meter of concrete is used.
    The concrete mix composition of the invention also contains a water reducer to improve processability and increase the initial setting time of the concrete. Water-reducing admixtures usually reduce the required water content for a concrete mix by about 5 to 10%. Consequently, concrete containing a water-reducing admixture requires less water to achieve a required slump than untreated concrete.
    The admixtures used are typical commercially available water reducers such as polycarboxylate ether water reducers or polynaphthalene sulfonate based water reducers. According to a preferred embodiment, the water reducer is present in an amount between 1.5 and 4.0 kg, preferably 2.1 kg, per cubic meter of concrete. Preferably, the water reducer may be added in an amount suitable to achieve a flow of the freshly mixed concrete of 180 mm +/- 20 mm in 10 minutes.
    According to a preferred embodiment of the invention, water is present in an amount of 130-145 l, preferably 135 l, per cubic meter of concrete.
    Commercially available accelerators, setting time modifiers, air entrainers, shrinkage reducers or other admixtures as defined in EN-234 may also be used to enhance the specific properties of the concretes of the invention. Delaying admixtures that slow down the setting speed of the concrete are used to counteract the accelerating effect of hot weather on the concrete tie. High temperatures often cause an increased cure speed that makes placement and completion difficult. Retarders keep the concrete workable during placement and delay the initial setting of the concrete.
    The preferred Portland cement content in the
    Concrete mixture scheme is 110-130 kg, preferably 120 kg per cubic meter of concrete.
    In order to obtain the results described, the C3A (tricalcium aluminate) content of the ordinary Portland cement is preferably h 5% by weight, more preferably 8% by weight.
    As noted above, the concrete mix composition of the invention does not require highly reactive, ultrafine cement or supplemental cementitious materials. Therefore, according to a preferred embodiment of the invention, the hydraulic binder has a Blaine fineness of 3000-5000 cm 2 / g. In particular, the ordinary Portland cement has a Blaine fineness of 3000-5000 cm 2 / g, preferably 4500 cm 2 / g, and the supplemental cementitious material has a Blaine fineness of 3500-6500 cm 2 / g, preferably 4500-5000 cm 2 / g ,
    Further, the specific types of Portland cements which achieve particularly good results in the present invention are preferably those having a C3S (tricalcium silicate) content of the ordinary Portland cement of 55-65% by weight. The C3S content reflects the amount of 3CaO-SiO 2 in the Portland cement. Preferably, the SO 3 (sulfate) content of the ordinary Portland cement is about 3.7% by weight.
    With respect to the supplemental cementitious material, particularly good results have been achieved in the present invention with a supplemental cementitious material having a basicity (CaO / SiO 2 ratio) of A 1.0.
    With regard to the aggregate, a preferred embodiment of the invention ensures that the aggregate is present in an amount of 1700-2100 kg, preferably 1850-2000 kg, per cubic meter of concrete.
    In particular, the aggregate may have the following particle size distribution: 800-900 kg / m3 sand with a particle size of 0-4 mm, 250-350 kg / m3 aggregate with a particle size of 4-8 mm, 300-400 kg / m3 aggregate with one Particle size of 8-16 mm, 300-400 kg / m3 aggregate with a particle size of 16-32 mm.
    The concrete blend scheme of the invention results in excellent crush resistance and durability. In particular, the concrete has a 28d compressive strength of> 45 MPa, preferably of> 50 MPa, in particular of> 60 MPa. Furthermore, the concrete preferably has an ld compressive strength of> 4 MPa, preferably of> 6 MPa, in particular of> 8 MPa.
    From the viewpoint of the durability of the concrete, the concrete of the present invention preferably has a Ck permeability of ^ 0.5 m2 - 10 -16. Further, the concrete preferably has a chloride penetration resistance of 1000 1000 coulombs.
    In a particularly advantageous embodiment, the concrete has a carbonation rate of ^ 6 mm / Va. In another preferred embodiment, the concrete has a resistivity of <1500 Ω -m.
    According to a further aspect of the invention there is provided a hydraulic binder suitable for making the concrete mix composition of the invention comprising 35-45% by weight of ordinary Portland cement and 55-65% by weight of a supplemental cementitious material.
    The invention will now be described with reference to the following exemplary embodiments.
    Example 1 Mortar was mixed with the mortar compositions as indicated in Table 1. In the mortar compositions of Table 1, a hydraulic binder consisting of 40% by weight of ordinary Portland cement and 60% by weight of ground granulated blast furnace slag (if necessary) was used. Further, sand was used as aggregate in an amount resulting from the sand / mortar ratio (S / M) as indicated. The sand / mortar ratio represents the volume ratio of the sand to the water, the sand and the binder. Further, water was added to the mixture of hydraulic binder and aggregate in an amount calculated from the water / binder ratio (W / B ) as indicated results. The water / binder ratio represents the weight ratio of the water content to the binder (cement and optionally). Further, a water reducer was added to the mixture with the dosage of the admixture adjusted to provide a mortar flow of 180 mm +/- 20 mm 10 minutes to reach. The mortar flow was measured on a dry glass plate.
    Table 1 Mortar Γ2οτη sä Vi 11 ortp _. Ordinary river ± n
    System ",. granulated S / M W / B, Λ
    Portland cement 10 mm
    Blast furnace slag _ [mm] _
    General Use _ 0pc GranCem® 1 (Holcim (Holcim 0.56 0.55 192 ', Canada,
    Canada,. , Mississauga
    Mississauga)
    General Use GranCem® 2 ° .lC,. (Holcim 0.58 0.50 200 (Holcim Canada,
    Canada, Mississauga)
    Mississauga)
    General Use GranCem® 3. (Holcim 0.60 ° '45 193 (Holcim Canada,
    Canada, Mississauga)
    Mississauga) τ Γ "GranCem®
    CEM I 5N 4 (Holcim ° * / 1Γη 0,56 0,55 184., Canada,
    Germany, .,. , Mississauga)
    Hover) 5 CEM 1, 5N GGBFS o, 56 0.55 174
    (Holcim (SIN, JP
    Germany, Nippon) Höver) CEM I 5N GranCem®, (Holcim (Holcim 6 '., Rr. 0.56 0.55 168
    Germany, Canada, Höver) Mississauga) CEM I 5N 'fHBf.
    Hole in p ^ ^ 7 Holcim, 0.58, 0.50, 177 ',, Germany,
    Germany, "Ί. , Salzgitter
    Hover)
    CEM I 5N GGBFS 8 (Holcim (SIN, JP 0.58 0.50 167
    Germany, Nippon) Höver) CEM I 5N GranCem® 9 (Holcim (Holcim o, 58 0.50 182
    Germany, Canada, Höver) Mississauga)
    CEM I 5N GGBFS 10 (Holcim (Holcim 0 60 0.45 168
    Germany, Germany, Höver) Salzgitter)
    CEM I 5N GGBFS 11 (Holcim (SIN, JP 0.60 0.45 162
    Germany, Nippon) Höver) T GranCem® CEM I 5N. 12 (Holcim 0.60 0.45 186,, Canada,
    Germany, ... . , , Mississauga)
    Hover)
    As is apparent from Table 1, various types of ordinary Portland cement and ggbfs were used. The relevant parameters of the types of common Portland cement used and the ggbfs used in the examples are given as follows:
    General Use OPC (Holcim Canada, Mississauga) C3A content: 8.4 wt% C3S content: 53.4 wt%
    Blaine fineness: 4320 cm 2 / g SC 2 content: 4.1% by weight CEM I 5N (Holcim Germany, Höver) C 3 A content: 11.1% by weight C 3 S content: 60.7% by weight %
    Blaine fineness: 4510 cm 2 / g SO 3 content: 3.7% by weight
    High Early Strength Cement (Holcim Canada, Mississauga): C3A content: 8.4% by weight C3S content: 53.4% by weight
    Blaine fineness: 5070 cm 2 / g SC> 3 content: 4.2% by weight
    GranCem® (Holcim Canada, Mississauga)
    Blaine fineness: 6540 cm 2 / g C / S ratio: 1.0 GGBFS (SIN, JP Nippon)
    Blaine fineness: 4190 cm 2 / g C / S ratio: 1.3 GGBFS (Holcim Germany, Salzgitter)
    Blaine fineness: 3900 cm 2 / g C / S ratio: 1.0
    The mortar was prepared and cured at 20 ° C, and its respective flux was measured on a glass plate, the strength was measured by casting 4x4x16 prisms, and the setting times were measured according to ASTM. As can be seen from Table 2, the compositions of
    Table 1 shows good early strength development, excellent value for 28-day strength, and good setting times. In some cases, the strength is above 80 MPa after 91 days.
    Table 2
    Beginning finale
    Pressure- Pressure- lighing- "RUC. , strength strength bonding
    System strength ". .., m, 28 days 91 days gestation ag a [MPa] [MPa] time [min] [min] "Ϊ 471 59, 3 66, 9 502 662 2 6, 0 70.9 80, 0 494 614 3 3.4 49.0 61.0 437 567 4 5.2 55.9 70.5 359 479 5 7.6 60.7 71.8 322 442 6 4.6 55.3 64.9 401 506 7 6 , 9 67.0 77.3 383 508 8 10.0 72.4 82.8 354 474 9 6, 1 61.3 71, 5 442 552 10 9.6 77.1 84.4 419 534 11 12, 9 81.3 91, 6 424 549 12 9.4 * 85, 1 471 576
    Example 2
    A concrete was prepared using the following blend composition:
    Component kg / m3
    Ordinary portland cement 120
    Milled granulated blast furnace slag 180
    Water 135
    Sand (particle size 0-4 mm) 857
    Aggregate (particle size 4-8 mm) 297
    Aggregate (particle size 8-16 mm) 359
    Aggregate (particle size 16-32 mm) 358
    Water reducer - Plastol 341 Adjusted to reach 15 cm slump
    Plastol 341 is a polycarboxylate-based softening admixture.
    The mixing scheme of Example 2 was varied using various types of Portland cement and ggbfs and by choosing various admixtures. Table 3 shows three compositions using general purpose limestone cement. Table 4 shows two compositions using high early strength cement.
    Table 3
    Table 4
    As shown in Tables 3 and 4, in all combinations of cement types and admixtures, the concrete blend schemes of the invention have excellent strength development and excellent durability.
    By comparing the strength values of Table 3 with those of Table 4, it can be seen that by increasing the
    Reactivity of the cement in combination with the use of specific admixtures can obtain values of 1-day strength of 10 MPa.
    The concrete of the invention has a CC> 2 footprint of about 100 kg / m3.
    权利要求:
    Claims (35)
    [1]
    claims:
    A concrete mix composition comprising: a hydraulic binder comprising 35-45% by weight of ordinary Portland cement and 55-65% by weight of a supplemental cementitious material, aggregates, a water reducer, the water / binder ratio being 0.35% 0.50.
    [2]
    A composition according to claim 1 wherein the supplemental cementitious material is ground granulated blast furnace slag, fly ash, pozzolans, ground limestone or mixtures thereof.
    [3]
    A composition according to claim 1 or 2, wherein the supplemental cementitious material consists of ground granulated blast furnace slag and / or fly ash.
    [4]
    4. The composition according to claim 1, 2 or 3, wherein water is present in an amount of 130-145 1, preferably 135 1, per cubic meter of concrete.
    [5]
    A composition according to any one of claims 1 to 4, wherein ordinary Portland cement is present in an amount of 110-130 kg, preferably 120 kg, per cubic meter of concrete.
    [6]
    A composition according to any one of claims 1 to 5, wherein the C3A (tricalcium aluminate) content of the ordinary Portland cement is> 5% by weight, preferably> 8% by weight.
    [7]
    7. A composition according to any one of claims 1 to 6, wherein the supplementary cementitious material, in particular blast furnace slag, is present in an amount of 160-230 kg, preferably 180 kg, per cubic meter of concrete.
    [8]
    A composition according to any one of claims 1 to 7, wherein the hydraulic binder has a Blaine fineness of 3000-5000 cm 2 / g.
    [9]
    A composition according to any one of claims 1 to 8, wherein the ordinary Portland cement has a Blaine fineness of 3000-5000 cm 2 / g, preferably 4500 cm 2 / g.
    [10]
    A composition according to any one of claims 1 to 9, wherein the supplemental cementitious material has a Blaine fineness of 3500-6500 cm 2 / g, preferably from 4500 to 5000 cm 2 / g.
    [11]
    A composition according to any one of claims 1 to 10, wherein the C3S (tricalcium silicate) content of the ordinary Portland cement is 50-65% by weight, preferably 55-65% by weight.
    [12]
    A composition according to any one of claims 1 to 11, wherein the SO 3 (sulfate) content of the ordinary Portland cement is 3.7% by weight.
    [13]
    A composition according to any one of claims 1 to 12, wherein the basicity (CaO / SiO 2 ratio) of the slag is 1.0.
    [14]
    14. A composition according to any one of claims 1 to 13, wherein the aggregate is present in an amount of 1700-2100 kg, preferably 1850-2000 kg, per cubic meter of concrete.
    [15]
    15. A composition according to any one of claims 1 to 14, wherein the aggregate has the following particle size distribution: 800-900 kg / m3 of sand with a particle size of 0-4 mm, 250-350 kg / m3 of aggregate with a particle size of 4-8 mm , 300-400 kg / m3 aggregate with a particle size of 8-16 mm, 300-400 kg / m3 aggregate with a particle size of 16-32 mm.
    [16]
    16. The composition according to any one of claims 1 to 15, wherein the water reducer is present in an amount between 1.5 and 4.0 kg, preferably 2.1 kg, per cubic meter of concrete.
    [17]
    A composition according to any one of claims 1 to 16, wherein the water reducer comprises polycarboxylate ether or polynaphthalene sulfonate.
    [18]
    18. A composition according to any one of claims 1 to 17, wherein the composition further contains setting accelerators, setting time modifiers, air entrainers and / or shrinkage reducers.
    [19]
    19. A composition according to any one of claims 1 to 18, wherein the concrete has a 28d compressive strength of> 45 MPa, preferably of> 50 MPa, in particular of> 60 MPa.
    [20]
    20. A composition according to any one of claims 1 to 19, wherein the concrete has an ld compressive strength of> 4 MPa, preferably of> 6 MPa, in particular of> 8 MPa.
    [21]
    21. A composition according to any one of claims 1 to 20, wherein the concrete has an O 2 permeability of <0.5 m2-10-16.
    [22]
    A composition according to any one of claims 1 to 21, wherein the concrete has a chloride penetration resistance of 1000 1000 coulombs.
    [23]
    A composition according to any one of claims 1 to 22, wherein the concrete has a carbonation rate of 6 6 mm / Va.
    [24]
    A composition according to any one of claims 1 to 23, wherein the concrete has a resistivity of 1500 1500 Ω -m.
    [25]
    25. A hydraulic binder for producing a concrete mix composition according to any one of claims 1 to 24, comprising 35-45 wt .-% of ordinary Portland cement and 55-65 wt .-% of a supplementary cementitious material.
    [26]
    A hydraulic binder according to claim 25, wherein the supplemental cementitious material is ground granulated blast furnace slag, fly ash, pozzolans, ground limestone or mixtures thereof.
    [27]
    27. A hydraulic binder according to claim 25 or 26, wherein the supplementary cementitious material consists of ground granulated blast furnace slag and / or fly ash.
    [28]
    28. A hydraulic binder according to claim 25, 26 or 27, wherein the C3A (Tricalciumaluminat) content of the ordinary Portland cement ^ 5 wt .-%, preferably ^ 8 wt .-%, is.
    [29]
    29. Hydraulic binder according to one of claims 25 to 28, wherein the hydraulic binder has a Blaine fineness of 3000-5000 cm2 / g.
    [30]
    A hydraulic binder according to any one of claims 25 to 29, wherein the ordinary Portland cement has a Blaine fineness of 3000-5000 cm 2 / g, preferably 4500 cm 2 / g.
    [31]
    31. A hydraulic binder according to any one of claims 25 to 30, wherein the supplementary cementitious material has a Blaine fineness of 3500-6500 cm2 / g, preferably of 5000 cm2 / g.
    [32]
    A hydraulic binder according to any one of claims 25 to 31, wherein the C3S (tricalcium silicate) content of the ordinary Portland cement is 50-65% by weight, preferably 55-65% by weight.
    [33]
    A composition according to any one of claims 25 to 32, wherein the SO 3 (sulfate) content of the ordinary Portland cement h is 3.7% by weight.
    [34]
    34. The composition according to any one of claims 25 to 33, wherein the basicity (CaO / SiC> 2 ratio) of the slag h is 1.0.
    [35]
    35. A structural element comprising concrete or consisting of concrete made using a concrete mix composition according to any one of claims 1 to 24. Vienna, June 11, 2015
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    同族专利:
    公开号 | 公开日
    WO2016151388A1|2016-09-29|
    AT517029B1|2017-02-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2901268B1|2006-05-17|2008-07-18|Lafarge Sa|CONCRETE WITH LOW CEMENT CONTENT|
    WO2011134025A1|2010-04-29|2011-11-03|Boral Cement Limited|Low c02 cement|
    US20130213274A1|2010-08-26|2013-08-22|Obayashi Corporation|Cement composition, method for producing mixed material, and method for producing cement composition|TN2019000222A1|2017-02-02|2021-01-07|Saroj Vanijya Private Ltd|Engineered concrete binder composition|
    CN111620647A|2020-05-09|2020-09-04|北京科技大学|Cementing filler containing grate furnace garbage incineration fly ash and preparation method thereof|
    法律状态:
    2020-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20200324 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA171/2015A|AT517029B1|2015-03-24|2015-03-24|Mixing cement composition|ATA171/2015A| AT517029B1|2015-03-24|2015-03-24|Mixing cement composition|
    PCT/IB2016/000337| WO2016151388A1|2015-03-24|2016-03-17|Blended cement composition|
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