CN110467364A - 一种早强抗海水侵蚀硫铝酸盐水泥 - Google Patents

一种早强抗海水侵蚀硫铝酸盐水泥 Download PDF

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Publication number
CN110467364A
CN110467364A CN201910835165.3A CN201910835165A CN110467364A CN 110467364 A CN110467364 A CN 110467364A CN 201910835165 A CN201910835165 A CN 201910835165A CN 110467364 A CN110467364 A CN 110467364A
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cement
sea water
sulphate aluminium
resistant
aluminium cement
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兰明章
杨远奇
陈智丰
王剑锋
崔素萍
王亚丽
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Beijing University of Technology
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Beijing University of Technology
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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
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements
    • C04B7/323—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • 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

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

Abstract

一种早强抗海水侵蚀硫铝酸盐水泥涉及建筑材料领域，提供具有早期强度高、抗海水侵蚀性能优异的硫铝酸盐水泥，满足海洋工程建设的需要。该水泥包括以下质量分数配制的原料：硫铝酸盐水泥熟料74％‑94％，硬石膏4.7％‑22.2％，氢氧化钙1.4％‑6.5％。本发明的水泥通过熟料、石膏、氢氧化钙的协同水化反应，形成大量的钙矾石和凝胶相并使得结构致密，从而水泥的早期及海水侵蚀环境下获得较高的强度。

Description

一种早强抗海水侵蚀硫铝酸盐水泥
技术领域
本发明涉及建筑材料领域，尤其是涉及一种早强抗海水侵蚀硫铝酸盐水泥。
背景技术
海水环境中具有高浓度的Mg2+、Cl-、SO4 2-等离子，海水中离子侵蚀下造成钢筋锈蚀、混凝土构筑物破坏及失效给社会带来了巨大的经济损失。目前我国在港口、码头、海洋工程上主要使用的是普通硅酸盐水泥和少量的抗硫酸盐水泥，这类水泥的抗渗性、耐磨性、致密性较差、早期强度低、海水侵蚀环境强度增长慢，其抗海水侵蚀、强度性能不能完全满足海洋工程的技术要求。
硫铝酸盐水泥比普通硅酸盐水泥具有较好的抗海水侵蚀性能，早期强度高，可以降低拆模时间加快工程进度，但在海水侵蚀环境中强度依旧增长缓慢。因此急需开发一种具有早期强度高、抗海水侵蚀性能优异的硫铝酸盐水泥，为市场提供质量优异的新型水泥，满足海洋工程建设的需要。
发明内容
本发明的目的在于提供一种早强抗海水侵蚀硫铝酸盐水泥，后期海水侵蚀环境下保持具有较高的强度增长，满足海洋工程建设的需要。
本发明的一种早强抗海水侵蚀硫铝酸盐水泥，其特征在于，包括以下质量分数配制的原料：硫铝酸盐水泥熟料74％-94％，硬石膏4.7％-22.2％，调控剂1.4％-6.5％。
优选地，所述水泥熟料为高贝利特硫铝酸盐水泥熟料，贝利特质量分数大于30％。
优选地，所述调控剂为氢氧化钙。
所述一种早强抗海水侵蚀硫铝酸盐水泥的制备方法，包括以下步骤：
步骤一、将水泥熟料粉磨至350-500㎡/kg，硬石膏、氢氧化钙粉磨至400-600㎡/kg。最后将各组分按照预定配比混合均匀。
步骤二、按照预定的配比称量各组分；
步骤三、将各组分按照预定配比混合均匀。
本发明的早强抗海水侵蚀硫铝酸盐水泥，由熟料、石膏、调控剂三种组分混合配置而成，配料简单且具有优异的性能。三种原材料相互协调促进水化形成致密的结构，因此具有较高的早期强度；未水化产物的继续水化保证了后期侵蚀环境下的强度增长。实施组与对照组相比早期及后期侵蚀下的强度均明显提高。
具体实施方式
下面结合具体实施例对本发明作进一步详细描述，但本发明的实施方式不限于此。
实施例中强度测定依照GB/T 17671-1999《水泥胶砂强度检验方法(ISO)》实施，按照预定配比将水泥、砂子和水搅拌均匀及成型试块。砂浆试块4小时至28天浸泡在清水中并测试每个龄期的强度，28天至60天浸泡在模拟海水或3％Na2SO4的溶液中并测试60天龄期的强度。
实施例
按质量百分比计，比表面积450㎡/kg的高贝利特硫铝酸盐水泥熟料74-94％，贝利特质量分数36％；比表面积550㎡/kg的硬石膏4.7-22.2％，氢氧化钙1.4-6.5％。
表1实施例早强抗海水侵蚀硫铝酸盐水泥质量百分比
早强抗海水侵蚀硫铝酸盐水泥的强度如表2所示。
表2水泥胶砂强度
4h清水 1d清水 3d清水 28d清水 60d硫酸钠 60d海水
对比组1 20.1 31.1 35.5 36.8 39.3 40.6
对比组2 20.9 24.2 29.7 42.4 37.4 38.2
对比组3 15.6 20.1 23.3 36.8 38.2 39.1
实施例1 24.2 37.4 42.8 45.3 52.3 52.9
实施例2 26.2 31.2 38.8 41.2 44.4 47.6
实施例3 31.9 39.9 49.0 54.2 57.3 57.6
实施例4 28.1 32.2 44.0 51.3 54.1 54.6
实施例5 30.8 48.0 53.7 55.3 59.8 62.7
实施例6 31.2 35.5 51.1 62.1 73.6 76.9
实施例7 30.2 35.8 39.9 40.6 49.9 50.6

Claims (3)

1.一种早强抗海水侵蚀硫铝酸盐水泥，其特征在于，包括以下质量分数配制的原料：硫铝酸盐水泥熟料74％-94％，硬石膏4.7％-22.2％，调控剂氢氧化钙1.4％-6.5％。
2.根据权利要求1所述的一种早强抗海水侵蚀硫铝酸盐水泥，其特征在于，所述硫铝酸盐水泥熟料为高贝利特硫铝酸盐水泥熟料，且贝利特质量分数大于30％。
3.制备如权利要求1所述的一种早强高强高贝利特硫铝酸盐水泥的方法，其特征在于，将硫铝酸盐水泥熟料粉磨至350-500㎡/kg，硬石膏、氢氧化钙粉磨至400-600㎡/kg，最后将各组分混合均匀。
CN201910835165.3A 2019-09-05 2019-09-05 一种早强抗海水侵蚀硫铝酸盐水泥 Pending CN110467364A (zh)

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Application publication date: 20191119