Microstructure Characteristics of Alkali Activated Slag‑Limestone Powder Paste in Marine Environment

被引：0

作者：

Wang C. ^{[1
,2
]}

Jin Z. ^{[1
,2
]}

Pang B. ^{[1
,2
]}

Lin X. ^{[1
,2
]}

Ji X. ^{[1
,2
]}

机构：

[1] School of Civil Engineering, Qingdao University of Technology, Qingdao

[2] Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, Qingdao University of Technology, Qingdao

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2024年 / 27卷 / 03期

关键词：

alkali‑activated slag; limestone powder; marine environment; microstructure;

D O I：

10.3969/j.issn.1007-9629.2024.03.004

中图分类号：

学科分类号：

摘要：

Based on the alkali activated slag‑limestone powder（AAS‑LS）low carbon cementitious composite system with different limestone powder contents，X‑ray diffraction（XRD），Fourier transform infrared spectrometer（FTIR），thermogravimetric analysis（TG‑DTG）and scanning electron microscope（SEM）were used to study the phase，functional groups and microstructure of the hydration products in the atmospheric and underwater areas of marine environment. The results show that during the natural carbonization of AAS‑LS pastes in the atmospheric area of marine environment，the main new carbonization products are the metastable vaterite and aragonite，which are the polycrystalline phases of calcium carbonate. Mg（OH）2 and a trace amount of Ca（OH）2 are formed in the continuous seawater immersion environment，and the hydrotalcite‑like phase appears remarkably after 12 months immersion. Limestone powder have a potential chemical effect in alkali‑activated system. © 2024 Tongji University. All rights reserved.

引用

页码：215 / 222

页数：7

共 20 条

[1] SHI C J, PALOMO A., New cements for the 21st century：The pursuit of an alternative to Portland cement ［J］, Cement and Concrete Research, 41, 7, (2011)
[2] PROVIS J L., Recent progress in low‑carbon binders［J］, Cement and Concrete Research, 122, (2019)
[3] SCRIVENER K L，, NONAT A., Hydration of cementitious materials，present and future［J］, Cement and Concrete Research, 41, 7, (2011)
[4] THOMAS R J, Et al., Comparison of chloride permeability methods for alkali‑activated concrete［J］, Construction and Building Materials, 165, (2018)
[5] SHI Z G，, Et al., Compressive strength，pore structure and chloride transport properties of alkali‑activated slag/ fly ash mortars［J］, Cement and Concrete Composites, 104, (2019)
[6] ZHUANG Peizhen, MA Yuwei, LUO Tiantian, Et al., Mechanical proprties of alkali‑activated slag/fly ash paste/mortar ［J］, Bulletin of the Chinese Ceramic Society, 41, 10, (2022)
[7] BERNAL S A, PROVIS J L., Engineering and durability properties of concretes based on alkali‑activated granulated blast furnace slag/metakaolin blends ［J］, Construction and Building Materials, 33, (2012)
[8] PENG Hui, LI Yicong, LUO Dong, Et al., Anglysis of reaction level and factors of alkali activated metakaolin/GGBFS［J］, Journal of Buiding Materials, 23, 6, (2020)
[9] ESCALANTE-GARCIA J I., Limestone as aggregate and precursor in binders of waste glass activated by CaO and NaOH［J］, Construction and Building Materials, 262, (2020)
[10] CARON R, PATEL R A, DEHN F., Activation kinetic model and mechanisms for alkali‑activated slag cements［J］, Construction and Building Materials, 323, (2022)

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