复合激发剂对碱矿渣胶结材水化进程及早期性能的影响

doi:10.11896/cldb.18110009

材料导报

2019, Vol. 33

Issue (14): 2326-2330 https://doi.org/10.11896/cldb.18110009

无机非金属及其复合材料

复合激发剂对碱矿渣胶结材水化进程及早期性能的影响

杨凯¹, 张之璐¹, 杨永¹, 韩昊², 黄文聪¹, 朱效宏¹, 唐德莎¹, 李爽¹, 杨长辉¹

1 重庆大学材料科学与工程学院,重庆 400045;
2 中交二航局第二工程有限公司,重庆 401121

Impact of Activator Mix Proportions on Hydration Process and Early-age Properties of Alkali-Activated Slag Binder

YANG Kai¹, ZHANG Zhilu¹, YANG Yong¹, HAN Hao², HUANG Wencong¹, ZHU Xiaohong¹, TANG Desha¹, LI Shuang¹, YANG Changhui¹

1 College of Materials Science and Engineering, Chongqing University, Chongqing 400045;
2 China Communications 2nd Navigational Bureau 2nd Engineering Co., Ltd., Chongqing 401121

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摘要通过混料设计研究了水玻璃、碳酸钠、氢氧化钠和氢氧化钙四种激发剂在复合条件下对矿渣的激发作用及对碱矿渣胶结材(AAS)早期性能的影响。使用水化微量热仪、X射线衍射仪、综合热分析仪分析了AAS的水化过程。结果显示:在碱当量和水胶比一定的条件下,复合激发剂仅能在100~130 mm范围内调节AAS砂浆的初始流动度,但对AAS砂浆抗压强度的影响显著。氢氧化钠的激发作用在3 d以内最显著,水玻璃对强度的贡献主要体现在3 d后;各激发剂间的交互作用主要体现在3 d以内的抗压强度上。与水玻璃激发AAS相比,在激发剂中加入1.5%碳酸钠会减缓AAS各龄期水化进程;加入3%氢氧化钙、1.5%和3%氢氧化钠能分别加快AAS 1 d和3 d内的水化进程,但均会降低28 d的水化进程。此外,根据ANOVA方差分析得到的回归方程,提出了利用激发剂种类和比例来调节及控制AAS水化进程的技术途径。

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	杨凯
	张之璐
	杨永
	韩昊
	黄文聪
	朱效宏
	唐德莎
	李爽
	杨长辉

关键词: 碱矿渣胶结材复合激发剂抗压强度水化进程

Abstract: The effect of four different activators (water glass, sodium carbonate, sodium hydroxide, calcium hydroxide) on slag and early-age perfor-mance of alkali-activated slag binder were studied by mixture design. The hydration process of AAS was analysed by isothermal carlorimetry, X-ray diffraction and Thermogravimetry. The obtained results indicated that when alkali concentration and water to binder ratio kept constant, the initial fluidity of AAS mortar could be regulated only in the range of 100—130 mm by activator mix proportions, while the compressive strength development of AAS mortar was strongly affected. The effect of sodium hydroxide on slag was significant before 3 d, while water glass governed compressive strength development after 3 d. The interactions between different activators were found mainly significant at early stage (before 3 d). Compared with sample activated by water glass, when 1.5% sodium carbonate was used to replace the same Na₂O concentration of water glass, the hydration process was delayed. The addition of 3% calcium hydroxide, 1.5% sodium hydroxide and 3% sodium hydroxide could accelerate the hydration process of AAS at 1 d and 3 d respectively, but both reduced the hydration process at 28 d. Furthermore, equations derived from ANOVA regression analysis offered approaches to optimize the AAS hydration process through varying activator types and their proportions.

Key words: alkali-activated slag binder activator mix proportions compressive strength hydration process

发布日期: 2019-06-19

ZTFLH:

TU528.01

基金资助: 十三五国家重点研发计划(2017YFB0309905);国家自然科学基金(51778089;51708060)

通讯作者: ychh@cqu.edu.cn

作者简介: 杨凯,重庆大学副研究员。2012 年12 月毕业于英国贝尔法斯特女王大学,获得工学博士学位。主要从事碱性胶凝材料、混凝土渗透性等方面的研究。杨长辉,重庆大学教授。1998 年1 月毕业于重庆建筑大学,获工程博士学位。主要从事碱性胶凝材料及其混凝土、固体废渣处置和利用及建筑节能等方面的研究。

引用本文:

杨凯, 张之璐, 杨永, 韩昊, 黄文聪, 朱效宏, 唐德莎, 李爽, 杨长辉. 复合激发剂对碱矿渣胶结材水化进程及早期性能的影响[J]. 材料导报, 2019, 33(14): 2326-2330.
YANG Kai, ZHANG Zhilu, YANG Yong, HAN Hao, HUANG Wencong, ZHU Xiaohong, TANG Desha, LI Shuang, YANG Changhui. Impact of Activator Mix Proportions on Hydration Process and Early-age Properties of Alkali-Activated Slag Binder. Materials Reports, 2019, 33(14): 2326-2330.

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http://www.mater-rep.com/CN/10.11896/cldb.18110009 或 http://www.mater-rep.com/CN/Y2019/V33/I14/2326

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