WO2017193607A1 - 一种预拌高强度水泥土 - Google Patents

一种预拌高强度水泥土 Download PDF

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Publication number
WO2017193607A1
WO2017193607A1 PCT/CN2017/000291 CN2017000291W WO2017193607A1 WO 2017193607 A1 WO2017193607 A1 WO 2017193607A1 CN 2017000291 W CN2017000291 W CN 2017000291W WO 2017193607 A1 WO2017193607 A1 WO 2017193607A1
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WIPO (PCT)
Prior art keywords
soil
cement
soil cement
sand
mixing
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Application number
PCT/CN2017/000291
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English (en)
French (fr)
Inventor
王继忠
Original Assignee
王继忠
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 王继忠 filed Critical 王继忠
Publication of WO2017193607A1 publication Critical patent/WO2017193607A1/zh

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Classifications

    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/10—Clay
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/10—Cements, e.g. Portland cement
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2103/00—Civil engineering use

Definitions

  • the invention relates to a premixed high strength cement soil.
  • the present invention invents a premixed high-strength cement soil, which is obtained by taking out the soil and mixing it into cement, fly ash, sand, and an appropriate amount of water at the construction site, and uniformly mixing it by using a machine.
  • High strength cement soil with pumpable fluidity The weight ratio of soil, cement, fly ash and sand is from 3 to 8:1:1 to 2:1 to 3.
  • the cement soil slump after mixing is 8-20 cm. After the cement soil is hardened, the strength is 2 to 10 MPa.
  • the cement can be replaced by a clay curing agent. It can be reduced or not added to sand. Add concrete admixture according to soil quality and design requirements during mixing.
  • the cement soil has high strength and fluidity suitable for pumping construction. It not only has a high construction speed, but also has high strength, controllable quality, low cost, wide application range and environmental friendliness, and is a very good construction. material.
  • the cement soil is mixed at the sludge site, and the cement soil is disposed in a ratio of 4.5:1:1.2:2 by weight of the sludge, cement, fly ash and sand, and an appropriate amount of water is added thereto to make the final mixing uniform.
  • the cement soil has a slump of 15 cm, the cement soil has a cement number of 42.5, and the cement soil has a strength of 4.2 MPa.
  • the cement soil is mixed at the silty soil site, and the cement soil is disposed in a ratio of 5:1:1.5:2.5 by weight of the silt, cement, fly ash and sand, and an appropriate amount of water is added thereto to make the final mixing.
  • the uniform cement soil has a slump of 10 cm, the cement soil has a cement number of 42.5, and the cement soil has a strength of 5.5 MPa.
  • cement soil mixing is carried out at the clay site, and the cement soil is disposed in a ratio of 4:1:1.8:3 by weight of clay, cement, fly ash and sand, and an appropriate amount of water is added thereto to finally mix the cement uniformly.
  • the slump of the soil is 8 cm
  • the cement in the cement soil is 32.5
  • the strength of the cement is 5.1 MPa.
  • cement soil mixing is carried out on the sand site, and the cement soil is disposed in a ratio of sand, cement and fly ash at a ratio of 5:1:1, and an appropriate amount of water is added thereto to finally mix the cement soil with uniformity.
  • the slump is 16 cm
  • the cement in the cement soil is 42.5
  • the cement is hardened at 6.9 MPa.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Paleontology (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Sludge (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

本申请涉及一种预拌高强度水泥土。其通过在施工现场，将土体取出并掺入水泥、粉煤灰、砂和适量的水，利用机械充分拌合均匀，得到具有可泵送的流动性的高强度水泥土。该水泥土具有高强度和适于泵送施工的流动性，不仅施工速度快，而且形成的水泥土强度高，质量可控，成本低，适用范围广泛，环境友好，是一种非常好的施工材料。

Description

一种预拌高强度水泥土 技术领域
本发明涉及一种预拌高强度水泥土。
背景技术
在各类工程施工过程中，往往会遇到改良土体，加固土体或者针对特定部位土体进行施工作业。如何最有效的改善土体性能以满足施工需要是当前岩土工程领域面临的重大课题。从业者进行了多方的尝试，其思路往往是通过混凝土等材料替换土体，造成施工成本高，施工速度慢；或者在土体中掺加入水泥等固化剂，通过在原位处的搅拌使其与土体结合以提高强度。但是，这种原位拌合往往由于缺乏流动空间，或者机械设备等原因拌合不均匀，而导致水泥土强度较低。
发明内容
为解决上述问题，本申请发明一种预拌高强度水泥土，其通过在施工现场，将土体取出并掺入水泥、粉煤灰、砂和适量的水，利用机械充分拌合均匀，得到具有可泵送的流动性的高强度水泥土。其中，土、水泥、粉煤灰、砂的重量比为3～8∶1∶1～2∶1～3。拌合均匀后的水泥土塌落度为8～20cm。水泥土硬化后强度为2～10MPa。其中的水泥能够以粘土固化剂代替。在砂土当中可以减少甚至不加砂。拌合时根据土质和设计要求加入混凝土外加剂。
该水泥土具有高强度和适于泵送施工的流动性，不仅施工速度快，而且形成的水泥土强度高，质量可控，成本低，适用范围广泛，环境友好，是一种非常好的施工材料。
具体实施方式
在淤泥土现场进行水泥土拌合，按照淤泥土、水泥、粉煤灰、砂的重量比为4.5∶1∶1.2∶2的比例配置水泥土，并向其中加入适量水，使得最终拌合均匀的水泥土的塌落度为15cm，水泥土中水泥标号为42.5，水泥土硬化后的强度为4.2MPa。
在粉质土现场进行水泥土拌合，按照粉土、水泥、粉煤灰、砂的重量比为5∶1∶1.5∶2.5的比例配置水泥土，并向其中加入适量水，使得最终拌合均匀的水泥土的塌落度为10cm，水泥土中水泥标号为42.5，水泥土硬化后的强度为5.5MPa。
在黏土现场进行水泥土拌合，按照黏土、水泥、粉煤灰、砂的重量比为4∶1∶1.8∶3的比例配置水泥土，并向其中加入适量水，使得最终拌合均匀的水泥土的塌落度为8cm，水泥土中水泥标号为32.5，水泥土硬化后的强度为5.1MPa。
在砂土现场进行水泥土拌合，按照砂土、水泥、粉煤灰的重量比为5∶1∶1的比例配置水泥土，并向其中加入适量水，使得最终拌合均匀的水泥土的塌落度为16cm，水泥土中水泥标号为42.5，水泥土硬化后的强度为6.9MPa。

Claims (6)

  1. 一种预拌高强度水泥土，其特征在于，其由土、水泥、粉煤灰、砂和适量的水拌合而成。
  2. 如权利要求1所述的水泥土，其特征在于，拌合时土、水泥、粉煤灰、砂的重量比为3～8∶1∶1～2∶1～3。
  3. 如权利要求1或2所述的水泥土，其特征在于，水泥土拌合后的塌落度为8～20cm。
  4. 如权利要求1或2或3所述的水泥土，其特征在于，水泥土硬化后的强度为2～10MPa。
  5. 如权利要求1-4之一所述的水泥土，其特征在于，其中的水泥能够以粘土固化剂代替，当土为砂土时，拌合时少加砂或者不加砂。
  6. 如权利要求1-5之一所述的水泥土，其特征在于，拌合时根据土质和设计要求加入混凝土外加剂。
PCT/CN2017/000291 2016-05-13 2017-04-11 一种预拌高强度水泥土 WO2017193607A1 (zh)

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CN112030940A (zh) * 2020-06-23 2020-12-04 武汉谦诚桩工科技股份有限公司 一种海相软土固化剂及原位预拌水泥土灌注桩施工工艺

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CN105969367B (zh) * 2016-05-13 2017-10-10 王继忠 一种预拌高强度水泥土
CN107816047A (zh) * 2017-11-01 2018-03-20 王继忠 利用预拌流态固化土进行回填土施工的方法
CN113322980A (zh) * 2021-03-04 2021-08-31 河海大学 一种基于自密水泥土的工程边坡滑坡灾害防护方法
CN115477520B (zh) * 2022-10-14 2023-09-22 中国人民解放军63653部队 一种砂土固化用复合材料及其制备方法和应用

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