CN113200689A - 一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法 - Google Patents

一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法 Download PDF

Info

Publication number
CN113200689A
CN113200689A CN202110540557.4A CN202110540557A CN113200689A CN 113200689 A CN113200689 A CN 113200689A CN 202110540557 A CN202110540557 A CN 202110540557A CN 113200689 A CN113200689 A CN 113200689A
Authority
CN
China
Prior art keywords
cement
resistance
portland cement
sulfate
production method
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
CN202110540557.4A
Other languages
English (en)
Inventor
李坤
岳维亮
邵成功
孙继亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Chongzheng Special Cement Co ltd
Original Assignee
Shandong Chongzheng Special Cement Co ltd
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 Shandong Chongzheng Special Cement Co ltd filed Critical Shandong Chongzheng Special Cement Co ltd
Priority to CN202110540557.4A priority Critical patent/CN113200689A/zh
Publication of CN113200689A publication Critical patent/CN113200689A/zh
Withdrawn legal-status Critical Current

Links

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
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/12—Natural pozzuolanas; Natural pozzuolana cements; Artificial pozzuolanas or artificial pozzuolana cements other than those obtained from waste or combustion residues, e.g. burned clay; Treating inorganic materials to improve their pozzuolanic characteristics
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Landscapes

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

Abstract

本发明提供了一种提高通用硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法,可适用于普通硅酸盐水泥、复合硅酸盐水泥等通用水泥品种。该生产方法通过在熟料中合理配伍粉煤灰、石灰石、矿渣粉、火山灰质等混合材料和适量掺加碳酸钡等方法，生产抗硫酸盐侵蚀、抗氯盐渗透性能指标高于抗硫酸盐硅酸盐水泥的通用硅酸盐水泥。

Description

一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产 方法
技术领域
本发明属于水泥生产领域，涉及一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法。
背景技术
沿海、盐碱地混凝土硫酸盐侵蚀是影响混凝土耐久性的重要原因之一，成为长期困扰建筑业的问题，很多工程未达到使用年限就出现各种非力学破坏，给社会生活和人身安全等造成了不利的影响，在以上区域施工一般要求采用抗硫酸盐硅酸盐水泥（以下简称抗硫水泥）以提高混凝土的耐久性，但抗硫水泥使用过程中存在两个问题，一是抗硫水泥只是一种抗硫酸盐侵蚀能力强于普硅水泥的硅酸盐水泥，其作用有待于进一步增强，二是抗硫酸水泥市场价格较高，施工单位使用意愿不强，不利于市场推广。针对以上问题本方案提供了一种提高通用硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法，生产出的通用水泥抗硫酸盐侵蚀、抗氯盐渗透性能优于抗硫水泥，且售价低于抗硫水泥，是抗硫酸盐侵蚀领域的新型硅酸盐水泥品种。
发明内容
一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法，其特征在于，所述水泥由低铝熟料、粉煤灰、矿渣粉、石灰石、火山灰质混合材组成。
所述水泥包括如下重量份的原料：低铝熟料50%~85%，矿渣粉5%~20%，粉煤灰2%~10%、火山灰质1%~20%,石灰石1%~20%。所述低铝熟料中C3A的含量为1%~7%。
大量研究表明，硫酸盐对水泥试体的侵蚀作用是一个复杂的物理化学反应过程，其机理是硫酸根通过水泥试体毛细孔渗透到水泥内部，与水泥中的Ca（OH）2和固态水化铝酸钙（熟料中C3A水化产物）等物质发生反应，生产钙矾石等膨胀性产物，从而产生膨胀内应力，破坏混凝土结构。提高水泥的抗硫酸盐侵蚀性、抗氯渗透性要从两方面入手，一是提高水泥的试块密实度，切断硫酸盐侵入途径；二是增加水泥试体抵御抗硫酸根侵蚀能力。具体为：
1、熟料采用低铝配比，合理控制熟料中C3A含量。
2、合理配伍粉煤灰、矿渣粉、火山灰质混合材配比及含量。掺加混合材可以进一步降低C3A和C3S含量，以上混合材能与水泥水化产物Ca（OH）2发生二次水化反应，其产物主要填充水泥石的毛细孔，提高水泥的密实度，使侵蚀介质侵入水泥体内部更为困难。其中，粉煤灰、火山灰质混合材不溶于盐酸，本身具有抵抗酸侵蚀的能力；矿渣粉的后期强度活性指数较高，二次水化能力强，能大幅提高水泥密实度并增加水泥的后期强度。
通过合理配伍粉煤灰与矿粉配比，有两方面作用：一是增加水泥后期强度；二是可以大幅提高抗硫酸盐侵蚀性、抗氯渗透性，提高试体的耐久性。
3、水泥中掺加一定比例的碳酸钡等物质，增强抗硫酸根侵蚀能力。
在水泥中掺加一种能固化硫酸根且反应产物对水泥试体无害的物质是增强水泥抗硫酸根侵蚀性的方法之一。这种物质需满足两个条件：1、硫酸根是通过水泥毛细孔缓慢由试体表面渗入表层内部的，所以固化产物必须具有缓释性。2、固化产物必须是稳定且对水泥试体是无害的。经分析，我们得出钡盐中的碳酸钡是符合以上条件的硫酸根吸收剂，其反应产物硫酸钡，性质稳定，且可附在水泥表面进一步阻止硫酸根的侵入。碳酸钡与硫酸钡较难溶于水，温度298K时，碳酸钡溶度积KSP=2.58*10-9 ，可以在水中缓慢释放；硫酸钡溶度积为KSP=1.1*10-10 ，可以保证反应的进行。经试验水泥中加入一定量的碳酸钡后，水泥试体抗硫酸盐侵蚀性得到了大幅提高。
具体实施方式
实施例1
方案参考GB749-2008抗硫酸盐侵蚀试验方法，将水泥胶砂试体分别浸泡在一定浓度的复合盐水溶液（复合盐水较单纯的硫酸盐溶液更具自然条件代表性）和水中养护到规定的龄期，以抗压强度之比确定抗硫酸盐侵蚀性。
具体步骤为水泥成型28天标准养护后，将试块分别放入由1000ml纯净水、加无水硫酸钠30g、氯化钠1.65g和六水氯化镁17.6g 制得的模拟自然盐碱水的复合盐水溶液中和淡水中，20℃条件下，侵蚀50天(可根据实际情况调整侵蚀龄期）。以同配比同龄期水泥试块在盐水中养护的抗压强度和淡水中标准养护抗压强度之比作为抗蚀系数K值（K=R液/R水），K值愈大说明抗硫酸盐侵蚀性愈好。
Figure DEST_PATH_IMAGE001
试验结果如下：
经试验，采用低铝配方生产的硅酸盐熟料，合理配伍粉煤灰、矿粉、火山灰质混合材等混合材料后再适量掺加碳酸钡，水泥试体抗硫酸盐侵蚀性得到了大幅提高。
上面对本发明进行了示例性描述，显然本发明具体实现并不受上述方式的限制，只要采用了本发明的方法构思和技术方案进行的各种非实质性的改进，或未经改进将本发明的构思和技术方案直接应用于其它场合的，均在本发明的保护范围之内。

Claims (3)

1.一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法，其特征在于，所述水泥由低铝熟料、粉煤灰、矿渣粉、石灰石、火山灰质混合材组成。
2.如权利要求1所述一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法，其特征在于，所述水泥包括如下重量份的原料：低铝熟料50%~85%，矿渣粉5%~20%，粉煤灰2%~10%、火山灰质混合材1%~20%,石灰石1%~20%。
3.如权利要求2所述一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法，其特征在于，所述低铝熟料中C3A的含量为1%~7%。
CN202110540557.4A 2021-05-18 2021-05-18 一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法 Withdrawn CN113200689A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110540557.4A CN113200689A (zh) 2021-05-18 2021-05-18 一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110540557.4A CN113200689A (zh) 2021-05-18 2021-05-18 一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法

Publications (1)

Publication Number Publication Date
CN113200689A true CN113200689A (zh) 2021-08-03

Family

ID=77031587

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110540557.4A Withdrawn CN113200689A (zh) 2021-05-18 2021-05-18 一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法

Country Status (1)

Country Link
CN (1) CN113200689A (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063668A (zh) * 1992-01-29 1992-08-19 中国建筑材料科学研究院 高强抗硫酸盐硅酸盐水泥
CN1792982A (zh) * 2005-11-25 2006-06-28 华南理工大学 一种抗氯盐侵蚀的硅酸盐水泥
CN101037306A (zh) * 2003-09-19 2007-09-19 中国建筑材料科学研究院 新型高抗硫水泥
MX2011002057A (es) * 2008-08-25 2011-04-05 Nippon Steel Corp Escoria de alto horno granulada molida resistente a sulfatos, cemento resistente a sulfatos y proceso para su produccion.
CN105693121A (zh) * 2016-03-02 2016-06-22 广西鱼峰水泥股份有限公司 海工硅酸盐水泥
CN105948553A (zh) * 2016-05-17 2016-09-21 武汉理工大学 一种水泥基材料用抗硫酸盐防腐剂

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063668A (zh) * 1992-01-29 1992-08-19 中国建筑材料科学研究院 高强抗硫酸盐硅酸盐水泥
CN101037306A (zh) * 2003-09-19 2007-09-19 中国建筑材料科学研究院 新型高抗硫水泥
CN1792982A (zh) * 2005-11-25 2006-06-28 华南理工大学 一种抗氯盐侵蚀的硅酸盐水泥
MX2011002057A (es) * 2008-08-25 2011-04-05 Nippon Steel Corp Escoria de alto horno granulada molida resistente a sulfatos, cemento resistente a sulfatos y proceso para su produccion.
CN105693121A (zh) * 2016-03-02 2016-06-22 广西鱼峰水泥股份有限公司 海工硅酸盐水泥
CN105948553A (zh) * 2016-05-17 2016-09-21 武汉理工大学 一种水泥基材料用抗硫酸盐防腐剂

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
姚燕主编: "《水泥与混凝土研究进展 第14届国际水泥化学大会论文综述》", 31 October 2016 *
高礼雄: "钡盐对混凝土抗硫酸盐侵蚀的有效性研究", 《混凝土》 *

Similar Documents

Publication Publication Date Title
Aziz et al. Hydration and durability of sulphate-resisting and slag cement blends in Caron's Lake water
Junco et al. Durability of lightweight masonry mortars made with white recycled polyurethane foam
Rajamane et al. Sulphate resistance and eco-friendliness of geopolymer concretes
KR101366003B1 (ko) 무시멘트 결합재를 사용한 콘크리트 블록
Siad et al. Assessment of the long-term performance of SCC incorporating different mineral admixtures in a magnesium sulphate environment
CN102850081A (zh) 一种含有工业固体废弃物的发泡水泥保温板及其制备方法
JP2004051426A (ja) セメント混和材、セメント組成物及びそれを用いてなるモルタルまたはコンクリート
Eyo et al. Incorporation of a nanotechnology-based product in cementitious binders for sustainable mitigation of sulphate-induced heaving of stabilised soils
Chen et al. Properties of hardened mortars containing crushed waste oyster shells
Taku et al. Effect of acidic curing environment on the strength and durability of concrete
WO2017069807A1 (en) Non-calcium geopolymer stablizer
Islam et al. Strength behavior of concrete using slag with cement in sea water environment
Tsampali et al. The role of crystalline admixtures in the long-term healing process of fiber-reinforced cementitious composites (FRCC)
Kawamura et al. Correlation between pore solution composition and alkali silica expansion in mortars containing various fly ashes and blastfurnace slags
CN113200689A (zh) 一种提高硅酸盐水泥抗硫酸盐侵蚀、抗氯盐渗透性能的生产方法
JP5068906B2 (ja) セメント混和材、セメント組成物、及びそれを用いてなるセメントコンクリート
Lee Performance of mortars exposed to different sulfate concentrations
Chen et al. The mechanical properties of coastal soil treated with cement
Seo et al. Sporosarcina pasteurii-induced hydration and shrinkage properties of Portland cement
Wafa Accelerated sulfate attack on concrete in a hot climate
Kayyali et al. Chloride binding capacity in cement-fly-ash pastes
Ma et al. Effect of rice husk ash on the thaumasite form of sulfate attack of cement-based materials
Oyebisi et al. Strength Prediction of GPC using Alkali pH, Salinity, Temperature, and Conductivity as Continuous Predictors
Senhadji et al. Sulfate attack of Algerian cement-based material with crushed limestone filler cured at different temperatures
DAKSHINA et al. Studies on fly ash concrete under sulphate attack in ordinary, standard and higher grades at earlier ages

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
CB03 Change of inventor or designer information

Inventor after: Li Kun

Inventor after: Yue Weiliang

Inventor after: Chai Bin

Inventor after: Shao Chenggong

Inventor after: Sun Jiliang

Inventor before: Li Kun

Inventor before: Yue Weiliang

Inventor before: Shao Chenggong

Inventor before: Sun Jiliang

CB03 Change of inventor or designer information
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20210803

WW01 Invention patent application withdrawn after publication