自由水对铝酸钙水泥水化产物之间转化的影响

doi:10.3969/j.issn.1001-1935.2021.05.013

耐火材料 ›› 2021, Vol. 55 ›› Issue (5): 435-438.DOI: 10.3969/j.issn.1001-1935.2021.05.013

自由水对铝酸钙水泥水化产物之间转化的影响

张阳¹⁾(), 李东红¹⁾(), 王毅¹, 张岩岩¹, 叶国田²⁾, 陈留刚²⁾, 田学坤²⁾

1) 中铝郑州有色金属研究院有限公司河南郑州 450041
2) 郑州大学材料科学与工程学院河南省高温功能材料重点实验室河南郑州 450052

收稿日期:2021-06-15 出版日期:2021-10-15 发布日期:2021-10-25
通讯作者: 李东红,女,1969年生,硕士,教授级高级工程师。E-mail: zyy_ldh@rilm.com.cn
作者简介:张阳:男,1987年生,工程师。E-mail: zyy_zhangyang@rilm.com.cn

Effect of free water on transformation of hydrates of calcium aluminate cement

Zhang Yang¹⁾(), Li Donghong¹⁾(), Wang Yi¹, Zhang Yanyan¹, Ye Guotian²⁾, Chen Liugang²⁾, Tian Xuekun²⁾

1) Zhengzhou Nonferrous Metals Research Institute Co.,Ltd.of CHINALCO,Zhengzhou 450041,Henan,China

Received:2021-06-15 Online:2021-10-15 Published:2021-10-25
Contact: Li Donghong

摘要/Abstract

摘要：

为确定CAH₁₀向C₃AH₆和AH₃的转化机制是固态脱水分解还是溶解-沉淀,将铝酸钙水泥浆体在10 ℃分别养护1和3 d生成CAH₁₀,再分别于60 ℃有水和无水条件下养护3 d,然后通过真空冷冻干燥法终止浆体水化,最后采用XRD和SEM研究水化产物的物相组成和显微形貌。结果发现:CAH₁₀在60 ℃养护过程中,有水存在时转化成C₃AH₆和AH₃,无水存在时则未转化成C₃AH₆和AH₃。这表明,CAH₁₀向C₃AH₆和AH₃的转化属于溶解-沉淀机制。

关键词: 铝酸钙水泥, 水化, 水化产物, 转化, 溶解-沉淀机制

Abstract:

To determine the transformation mechanism of CAH₁₀ to C₃AH₆ and AH₃ solid-state dehydration decomposition or dissolution-precipitation,the calcium aluminate slurry was cured at 10 ℃ for 1 and 3 d to form CAH₁₀,and then the slurry was cured at 60 ℃ in water and anhydrous conditions for 3 d,respectively,then the slurry hydration was terminated by vacuum freeze drying,and finally the phase composition and microstructure of the hydration products were studied by XRD and SEM.The results show that,with water,CAH₁₀ converts to C₃AH₆ and AH₃,without water,CAH₁₀ does not convert to C₃AH₆ and AH₃.This suggests that the transformation of CAH₁₀ to C₃AH₆ and AH₃ belongs to a dissolution-precipitation mechanism.

Key words: calcium aluminate cement, hydration, hydrates, transformation, dissolution-precipitation mechanism

中图分类号:

TQ175

张阳, 李东红, 王毅, 张岩岩, 叶国田, 陈留刚, 田学坤. 自由水对铝酸钙水泥水化产物之间转化的影响[J]. 耐火材料, 2021, 55(5): 435-438.

Zhang Yang, Li Donghong, Wang Yi, Zhang Yanyan, Ye Guotian, Chen Liugang, Tian Xuekun. Effect of free water on transformation of hydrates of calcium aluminate cement[J]. Refractories, 2021, 55(5): 435-438.

图/表 5

表1 试样的养护条件

Tab.1 Curing conditions of specimens

试样编号	养护条件
S10	原始浆料在10 ℃养护1 d
S10-3	原始浆料在10 ℃养护3 d
S60ws	S10继续在60 ℃无水条件下养护3 d
S60-3ws	S10-3继续在60 ℃无水条件下养护3 d
S60ys	S10继续在60 ℃有水条件下养护3 d
S60-3ys	S10-3继续在60 ℃有水条件下养护3 d

图1 10 ℃养护1d后以及继续在不同条件下养护后试样的XRD图谱

Fig.1 XRD patterns of specimens cured at 10 ℃ for 1 day and further cured under different conditions

图2 10 ℃养护1 d后以及继续在不同条件下养护后试样的SEM照片

Fig.2 SEM micrographs of specimens cured at 10 ℃ for 1 day and further cured under different conditions

图3 10 ℃养护3 d后以及继续在不同条件下养护后试样的XRD图谱

Fig.3 XRD patterns of specimens cured at 10 ℃ for 3 days and further cured under different conditions

图4 10 ℃养护3 d以及继续在不同条件下养护后试样的SEM照片

Fig.4 SEM micrographs of specimens cured at 10 ℃ for 3 days and further cured under different conditions

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自由水对铝酸钙水泥水化产物之间转化的影响

Effect of free water on transformation of hydrates of calcium aluminate cement

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