WO2020238945A1 - 一种砌筑式沥青混凝土及其制备方法 - Google Patents

一种砌筑式沥青混凝土及其制备方法 Download PDF

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WO2020238945A1
WO2020238945A1 PCT/CN2020/092550 CN2020092550W WO2020238945A1 WO 2020238945 A1 WO2020238945 A1 WO 2020238945A1 CN 2020092550 W CN2020092550 W CN 2020092550W WO 2020238945 A1 WO2020238945 A1 WO 2020238945A1
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masonry
asphalt
asphalt concrete
cement
mixing
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PCT/CN2020/092550
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English (en)
French (fr)
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谢雷
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山西中润路科科技股份有限公司
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10—Lime cements or magnesium oxide cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72—Repairing or restoring existing buildings or building materials

Definitions

  • the invention belongs to the technical field of concrete, and specifically relates to a masonry asphalt concrete and a preparation method thereof.
  • Pouring asphalt concrete is mainly used to pave the lower layer of the asphalt surface layer of the bridge. It has the characteristics of good water sealing effect, thin paving thickness and light weight per unit area.
  • the stones need to be heated to 290 ⁇ 330°C, and the discharge temperature reaches 220 ⁇ 250°C.
  • Special transportation vehicles and paving equipment are required for paving operations. The total waiting time cannot exceed 5h, and the high temperature is extremely easy. Burn people.
  • the slurry seal is mainly used for the overall repair of the road surface, extending the service life of the road, and has the characteristics of good adhesion and low discharge temperature.
  • the purpose of the present invention is to provide a masonry asphalt concrete and a preparation method thereof, which can repair the pits and cracks of the asphalt pavement or can be used for the construction of asphalt concrete blocks, and has no heating or low temperature heating, on-site The characteristics of mixing, easy transportation, manual masonry, and no rolling compaction.
  • a masonry asphalt concrete which is composed of the following raw materials: emulsified asphalt 18%-22%, hydraulic cement 6%-11%, and the rest are graded aggregates; the emulsified asphalt, hydraulic cement and graded Masonry asphalt concrete is prepared by mixing aggregates;
  • the grading range of the gradation aggregate is: the pass rate of 2.36mm mesh is 100%, the pass rate of 1.18mm mesh is 65%-85%, the pass rate of 0.6mm mesh is 45%-65%, 0.3mm
  • the sieve pass rate is 20%-30%, the 0.15mm sieve pass rate is 12%-18%, and the 0.075mm sieve pass rate is 5% to 7.5%;
  • the emulsified asphalt is prepared from asphalt heated to 140-150°C, water heated to 60-70°C, and emulsifier through high-speed shearing of an emulsified asphalt shear mill; the emulsifier adopts a fast-cracking cationic emulsifier, Medium-crack cationic emulsifier or medium-crack anionic emulsifier; the mass ratio of the asphalt to water is 6:4, the external blending amount of the emulsifier is 8-13 kg/ton; the pH of the water is 7 ⁇ 0.4 .
  • the hydraulic binder adopts any one of cement, gypsum and slaked lime.
  • the cement adopts one or more of Portland cement, ordinary Portland cement, slag cement, pozzolan cement and fly ash cement.
  • graded aggregate is prepared by sieving limestone powder, granite powder, washed sand and machine-made sand.
  • a method for preparing masonry asphalt concrete includes the following steps:
  • a masonry asphalt concrete which is composed of the following raw materials: emulsified asphalt 18%-22%, hydraulic binder 6%-11%, and the rest are graded aggregates;
  • the grading range of the gradation aggregate is: the pass rate of 2.36mm mesh is 100%, the pass rate of 1.18mm mesh is 65%-85%, the pass rate of 0.6mm mesh is 45%-65%, 0.3mm
  • the sieve opening rate is 20%-30%, the 0.15mm sieve opening rate is 12%-18%, and the 0.075mm sieve opening rate is 5% ⁇ 7.5%;
  • the emulsified asphalt is prepared from asphalt heated to 140-150°C, water heated to 60-70°C, and emulsifier through high-speed shearing of an emulsified asphalt shear mill; the emulsifier adopts a fast-cracking cationic emulsifier, Medium-crack cationic emulsifier or medium-crack anionic emulsifier; the mass ratio of the asphalt to water is 6:4, and the external blending amount of the emulsifier is 8-13 kg/ton; the pH of the water is 7 ⁇ 0.4 .
  • the hydraulic binder adopts any one of cement, gypsum and slaked lime.
  • the cement adopts one or more of Portland cement, ordinary Portland cement, slag cement, pozzolan cement and fly ash cement.
  • the graded aggregate is prepared by sieving limestone powder, granite powder, washed sand, and machine-made sand.
  • an admixture is added.
  • the admixture adopts LKW type oil-based asphalt warm mixing agent, and the mixing amount is 0.2% of the mass of emulsified asphalt.
  • a preparation method of masonry asphalt concrete includes the following steps:
  • the total moisture content of the mixture is controlled by controlling different temperatures. When it is not heated, the total moisture content in the combined material is less (total content is 10% to 13%), and when the temperature is heated to 70 ⁇ 10°C, the moisture content is higher (The total content is 12%-16%).
  • the moisture in the combined material mainly comes from emulsified asphalt.
  • the cohesive force of the masonry asphalt concrete prepared in this embodiment is greater than or equal to 2.0 N ⁇ m; the wheel track width change rate is less than 5%; the amount of adhered sand is less than 450 g/m 3 ; the abrasion value of 1 hour in water is less than 540 g/m 2 , The abrasion value after immersion in water for 6 hours is less than 800g/m 2 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Road Paving Structures (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

一种砌筑式沥青混凝土及其制备方法，采用乳化沥青、水硬性胶结料和级配骨料，在不加热或低温加热条件下混合，制备砌筑式沥青混凝土；通过控制混合料中的乳化沥青、水硬性胶结料以及骨料级配的含量范围，混合料人工砌筑时不粘连工器具，混合料人工砌筑并养护后的材料性能达到《公路沥青路面设计规范》(JTGD50-2017)中的强度要求。

Description

一种砌筑式沥青混凝土及其制备方法
本申请要求于2019年5月27日提交中国专利局、申请号为201910444754.9、发明名称为“一种砌筑式沥青混凝土及其制备方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于混凝土技术领域，具体涉及一种砌筑式沥青混凝土及其制备方法。
背景技术
浇筑式沥青混凝土主要用于铺筑桥梁沥青面层的下面层，具有封水效果好、铺装厚度薄、单位面积总质量轻的特点。但生产浇筑式混凝土时石料需要加温至290～330℃，出料温度达到220～250摄氏度，需要专用的运输车辆和摊铺设备进行铺筑作业，总等待时间不能超过5h，而且高温极易烫伤人员。
稀浆封层主要用于路面整体修复，延长道路使用年限，具有粘附效果好，出料温度低的特点。但由于乳化沥青破乳速度快、铺筑后需要碾压、粘稠不便于人工作业等特点，不适用于路面修复用沥青混凝土块的砌筑。
砌筑式沥青混凝土主要用于路面裂缝或坑槽修复和沥青混凝土块的砌筑，具有成品温度低、可使用普通搅拌设备或者人工搅拌或现场拌制、总等待时间长、运输要求低、人工作业方便、无需碾压、使用安全的特点。
发明内容
本发明的目的在于提供一种砌筑式沥青混凝土及其制备方法，可以修复沥青路面坑槽和裂缝或可以砌筑沥青混凝土块的砌筑式沥青混凝土，并且具有不加温或低温加热、现场搅拌、便于运输、人工砌筑、无需碾压的特点。
为达到上述目的，本发明提供的技术方案为：
一种砌筑式沥青混凝土，由以下原料组成：乳化沥青18％～22％、水硬性胶结料6％～11％、其余为级配骨料；所述乳化沥青、水硬性胶结料和级配骨料混合制得砌筑式沥青混凝土；
所述级配骨料级配范围为：2.36mm筛孔通过率为100％，1.18mm筛 孔通过率为65％～85％，0.6mm筛孔通过率为为45％～65％，0.3mm筛孔通过率为20％～30％，0.15mm筛孔通过率为12％～18％，0.075mm筛孔通过率为5％～7.5％；
所述乳化沥青由加热至140～150℃的沥青、加热至60～70℃的水和乳化剂经乳化沥青剪切磨机高速剪切制备而成；所述乳化剂采用快裂阳离子乳化剂、中裂阳离子乳化剂或中裂阴离子乳化剂；所述沥青与水的质量比为6:4，所述乳化剂外掺量为8～13千克/吨；所述水的pH值为7±0.4。
进一步地，所述水硬性胶结料采用水泥、石膏和熟石灰中的任一种。
进一步地，所述水泥采用硅酸盐水泥、普通硅酸盐水泥、矿渣水泥、火山灰水泥和粉煤灰水泥中的一种或多种。
进一步地，所述级配骨料由石灰岩石粉、花岗岩石粉、水洗砂、机制砂筛分后制备。
进一步地，所述沥青混凝土在低于5℃施工环境使用时，还添加有外加剂。
进一步地，所述外加剂采用LKW型油基沥青温拌剂，掺量为乳化沥青质量的0.2％。
一种砌筑式沥青混凝土的制备方法，包括以下步骤：
S1、按质量百分比称量18％～22％的乳化沥青、6％～11％的水硬性胶结料、其余为级配骨料；
S2、在乳化沥青中加入级配骨料和水硬性胶结料，置于搅拌设备中常温搅拌或低温加热搅拌。
进一步地，所述常温搅拌具体操作为在环境温度为10～40℃时不加热直接搅拌。
进一步地，所述低温加热搅拌具体操作为将乳化沥青加热至70±10℃。
进一步地，所述砌筑式沥青混凝土在低于5℃施工环境使用时，加入温拌剂，其具体操作为将沥青质量0.2％的温拌剂倒入已加热的沥青中保温8小时。
与现有技术相比，本发明所具有的有益效果为：
本发明提供了一种砌筑式沥青混凝土及其制备方法，采用乳化沥青、 水硬性胶结料和级配骨料，在不加热或低温加热条件下混合，制备砌筑式沥青混凝土；通过控制不同温度来控制混合料的水分总含量；通过控制混合料中的乳化沥青、水硬性胶结料以及骨料的级配的含量范围，使得混合料人工砌筑时不粘连工器具；通过控制骨料、乳化沥青、水硬性胶结料、骨料、添加剂的质量和级配范围，使得混合料人工砌筑并养护后的材料性能达到《公路沥青路面设计规范》(JTG D50-2017)中的强度要求；本发明制备的砌筑式沥青混凝土对生产运输设备要求不高，无需碾压，可现场制并便于人工砌筑。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
一种砌筑式沥青混凝土，由以下原料组成：乳化沥青18％～22％、水硬性胶结料6％～11％、其余为级配骨料；
所述级配骨料级配范围为：2.36mm筛孔通过率为100％，1.18mm筛孔通过率为65％～85％，0.6mm筛孔通过率为为45％～65％，0.3mm筛孔通过率为20％～30％，0.15mm筛孔通过率为12％～18％，0.075mm筛孔通过率为5％～7.5％；
所述乳化沥青由加热至140～150℃的沥青、加热至60～70℃的水和乳化剂经乳化沥青剪切磨机高速剪切制备而成；所述乳化剂采用快裂阳离子乳化剂、中裂阳离子乳化剂或中裂阴离子乳化剂；所述沥青与水的质量比为6:4，所述乳化剂外掺量为8～13千克/吨；所述水的pH值为7±0.4。
在本实施例中，所述水硬性胶结料采用水泥、石膏和熟石灰中的任一种。所述水泥采用硅酸盐水泥、普通硅酸盐水泥、矿渣水泥、火山灰水泥和粉煤灰水泥中的一种或多种。所述级配骨料由石灰岩石粉、花岗岩石粉、水洗砂、机制砂筛分后制备。所述沥青混凝土在低于5℃施工环境使用时，还添加有外加剂。所述外加剂采用LKW型油基沥青温拌剂，掺量为乳化沥青质量的0.2％。
一种砌筑式沥青混凝土的制备方法，包括以下步骤：
S1、按质量百分比称量18％～22％的乳化沥青、6％～11％的水硬性胶结料、其余为级配骨料；
S2、在乳化沥青中加入级配骨料和水硬性胶结料，置于搅拌设备中常温搅拌或低温加热搅拌；所述常温搅拌具体操作为在环境温度为10～40℃时不加热直接搅拌，整个过程不加热。所述低温加热搅拌具体操作为将乳化沥青加热至70±10℃，整个过程仅对乳化沥青加热即可。
通过控制不同温度来控制混合料的水分总含量，不加热时，组合材料中的水分总含量较少(总含量为10％～13％)，低温加热至70±10℃时，水分含量较高(总含量为12％～16％)。组合料中的水分主要来自于乳化沥青。
在本实施例中，所述砌筑式沥青混凝土在低于5℃施工环境使用时，加入温拌剂，其具体操作为将沥青质量0.2％的温拌剂倒入已加热的沥青中保温8小时。
本实施例制备的砌筑式沥青混凝土粘聚力大于等于2.0N·m；轮迹宽度变化率小于5％；粘附砂量小于450g/m 3；浸水1小时磨耗值小于540g/m 2，浸水6小时磨耗值小于800g/m 2。
上面仅对本发明的较佳实施例作了详细说明，但是本发明并不限于上述实施例，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化，各种变化均应包含在本发明的保护范围之内。

Claims (12)

  1. 一种砌筑式沥青混凝土，其特征在于，由以下原料组成：乳化沥青18％～22％、水硬性胶结料6％～11％、其余为级配骨料；
    所述级配骨料的级配范围为：2.36mm筛孔通过率为100％，1.18mm筛孔通过率为65％～85％，0.6mm筛孔通过率为为45％～65％，0.3mm筛孔通过率为20％～30％，0.15mm筛孔通过率为12％～18％，0.075mm筛孔通过率为5％～7.5％；
    所述乳化沥青由加热至140～150℃的沥青、加热至60～70℃的水和乳化剂经乳化沥青剪切磨机高速剪切制备而成；所述乳化剂采用快裂阳离子乳化剂、中裂阳离子乳化剂或中裂阴离子乳化剂；所述沥青与水的质量比为6:4，所述乳化剂的外掺量为8～13千克/吨；所述水的pH值为7±0.4。
  2. 根据权利要求1所述的一种砌筑式沥青混凝土，其特征在于：所述水硬性胶结料采用水泥、石膏、熟石灰中的任一种。
  3. 根据权利要求2所述的一种砌筑式沥青混凝土，其特征在于：所述水泥采用硅酸盐水泥、矿渣水泥、火山灰水泥和粉煤灰水泥中的一种或多种。
  4. 根据权利要求1所述的一种砌筑式沥青混凝土，其特征在于：所述级配骨料由石灰岩石粉、花岗岩石粉、水洗砂、机制砂筛分后制备得到。
  5. 根据权利要求1所述的一种砌筑式沥青混凝土，其特征在于：所述沥青混凝土在低于5℃施工环境使用时，还添加有外加剂。
  6. 根据权利要求5所述的一种砌筑式沥青混凝土，其特征在于：所述外加剂采用LKW型油基沥青温拌剂，掺量为乳化沥青质量的0.2％。
  7. 根据权利要求1所述的一种砌筑式沥青混凝土，其特征在于，所述砌筑式沥青混凝土粘聚力大于等于2.0N·m；轮迹宽度变化率小于5％；粘附砂量小于450g/m 3；浸水1小时磨耗值小于540g/m 2，浸水6小时磨耗值小于800g/m 2。
  8. 一种砌筑式沥青混凝土的制备方法，其特征在于，包括以下步骤：
    S1、按质量百分比称量18％～22％的乳化沥青、6％～11％的水硬性胶结料、其余为级配骨料；
    S2、在乳化沥青中加入级配骨料和水硬性胶结料，置于搅拌设备中常温搅拌或低温加热搅拌。
  9. 根据权利要求8所述的一种砌筑式沥青混凝土的制备方法，其特征在于，所述常温搅拌具体操作为在环境温度为10～40℃时不加热直接搅拌，整个过程不加热。
  10. 根据权利要求8所述的一种砌筑式沥青混凝土的制备方法，其特征在于，所述低温加热搅拌具体操作为将乳化沥青加热至70±10℃，整个过程仅对乳化沥青加热。
  11. 根据权利要求9或10所述的一种砌筑式沥青混凝土的制备方法，其特征在于，常温搅拌时，所述砌筑式沥青混凝土的总水分含量为10％～13％；低温加热搅拌时，所述砌筑式沥青混凝土的总水分含量为12～16％。
  12. 根据权利要求8所述的一种砌筑式沥青混凝土的制备方法，其特征在于，所述砌筑式沥青混凝土在低于5℃施工环境使用时，还加入温拌剂，其具体操作为将占乳化沥青质量0.2％的温拌剂倒入已加热的乳化沥青中保温8小时。
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