Effects of LDHs on Carbonation Resistance of Supersulfated Cement

doi:10.16552/j.cnki.issn1001-1625.2025.0187

Abstract

Abstract: To effectively enhance the carbonation resistance of supersulfated cement (SSC), 2% (mass fraction) of experimentally synthesized layered double hydroxides (LDHs) was added and compared with the same dosage of three admixtures: sodium aluminate (NaAlO₂), sodium hydroxide (NaOH), and sodium lactate (C₃H₅O₃Na). The effects of LDHs on the composition of hydration products, pore structure characteristics, and carbonation resistance of SSC concrete were investigated by means of mercury intrusion porosimetry (MIP), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric test (TG-DTG), and scanning electron microscopy (SEM). The results show that the 28 d compressive strength of SSC concrete with LDHs addition is the highest, reaching 40.6 MPa. The 28 d carbonation depth of SSC concrete is 22.7 mm, which is reduced to 14.6 mm with LDHs addition. The carbonation depths of SSC concrete with NaAlO₂, sodium lactate, and NaOH additions are 21.4, 17.2 and 24.5 mm, respectively. LDHs facilitate the formation of more hydration products in SSC concrete, reducing the total porosity of concrete by 6.28%. The addition of LDHs effectively improves the mechanical properties and carbonation resistance of SSC concrete. Sodium lactate and NaAlO₂ have a secondary effect compared to LDHs, while NaOH has no improvement effect. LDHs increase the degree of SSC concrete hydration and refine the pore structure. The dense concrete structure is conducive to the improvement of mechanical properties and carbonation resistance.

Key words: supersulfated cement, layered double hydroxide, carbonation depth, pore structure, mechanical property

CLC Number:

TU528

WANG Jiawei, LI Chuanhai, ZHANG Chong, ZHANG Xiuzhi. Effects of LDHs on Carbonation Resistance of Supersulfated Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(8): 2790-2800.

References

[1] MASSOUMI NEJAD B, ENFERADI S, ANDREW R. A comprehensive analysis of process-related CO₂ emissions from Iran's cement industry[J]. Cleaner Environmental Systems, 2025, 16: 100251.
[2] WU Q Y, XUE Q Z, YU Z Q. Research status of super sulfate cement[J]. Journal of Cleaner Production, 2021, 294: 126228.
[3] KHATIB J M, MANGAT P S, WRIGHT L. Mechanical and physical properties of concrete containing FGD waste[J]. Magazine of Concrete Research, 2016, 68(11): 550-560.
[4] CHEN W T, LI Y C, ZHOU Y, et al. Impact of basic oxygen furnace slag on the hydration microstructure, mechanical properties, and carbon emissions of supersulfated cement[J]. Construction and Building Materials, 2024, 432: 136673.
[5] MA W B, FENG S L, DENG P, et al. Utilization of ultra-fine desulfurization ashes in supersulfated cementitious materials and its influence on the mechanical and durability performance[J]. Construction and Building Materials, 2025, 459: 139780.
[6] 姜骞, 刘加平, 杨斌, 等. 早强外加剂和养护温度对混凝土早期性能的影响[J]. 新型建筑材料, 2020, 47(2): 9-13.
JIANG Q, LIU J P, YANG B, et al. Influence of early strengthening agent and curing temperature on early age performance of concrete[J]. New Building Materials, 2020, 47(2): 9-13 (in Chinese).
[7] 刘飞鹏, 杨瑞美, 许婧, 等. 掺氢氧化钠激发剂粉煤灰-水泥强度性能试验研究[J]. 粉煤灰综合利用, 2019, 33(6): 3-6+50.
LIU F P, YANG R M, XU J, et al. The strength performance test research of mixing sodium hydroxide exciting agent with fly ash-cement[J]. Fly Ash Comprehensive Utilization, 2019, 33(6): 3-6+50 (in Chinese).
[8] 廖嘉欣, 王健, 孔祥明, 等. 硫酸铝和偏铝酸钠对水泥浆体强度发展的影响机理[J]. 建筑材料学报, 2024, 27(12): 1071-1080.
LIAO J X, WANG J, KONG X M, et al. Impact mechanism of aluminum sulfate and sodium aluminate on strength development of cement mortars[J]. Journal of Building Materials, 2024, 27(12): 1071-1080 (in Chinese).
[9] 武双磊, 季军荣, 周威杰, 等. 乳酸钠对超硫酸盐水泥强度的影响及作用机理[J]. 硅酸盐通报, 2022, 41(9): 3008-3015.
WU S L, JI J R, ZHOU W J, et al. Effect and mechanism of sodium lactate on strength of supersulfate cement[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(9): 3008-3015 (in Chinese).
[10] 袁慧慧, 秦兴, 孙钰璇, 等. EDTA改性CaAl-LDH对水泥基材料性能的影响[J]. 硅酸盐通报, 2023, 42(5): 1578-1588.
YUAN H H, QIN X, SUN Y X, et al. Effect of EDTA modified CaAl-LDH on properties of cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(5): 1578-1588 (in Chinese).
[11] 邹瑜. LDHs功能材料在建筑领域的应用研究进展[J]. 无机盐工业, 2022, 54(6): 13-22.
ZOU Y. Research progress on application of LDHs functional materials in field of construction[J]. Inorganic Chemicals Industry, 2022, 54(6): 13-22 (in Chinese).
[12] XU S L, CHEN Z R, ZHANG B W, et al. Facile preparation of pure CaAl-layered double hydroxides and their application as a hardening accelerator in concrete[J]. Chemical Engineering Journal, 2009, 155(3): 881-885.
[13] OKORONKWO M U, GLASSER F P. Compatibility of hydrogarnet, Ca₃Al₂(SiO₄)_x(OH)_4(3-x), with sulfate and carbonate-bearing cement phases: 5~85 ℃[J]. Cement and Concrete Research, 2016, 83: 86-96.
[14] MA J T, DUAN P, REN D M, et al. Effects of layered double hydroxides incorporation on carbonation resistance of cementitious materials[J]. Journal of Materials Research and Technology, 2019, 8(1): 292-298.
[15] SHUI Z H, YU R, CHEN Y X, et al. Improvement of concrete carbonation resistance based on a structure modified layered double hydroxides (LDHs): experiments and mechanism analysis[J]. Construction and Building Materials, 2018, 176: 228-240.
[16] CHEN M Z, YUAN H H, QIN X, et al. Improve corrosion resistance of steel bars in simulated concrete pore solution by the addition of EDTA intercalated CaAl-LDH[J]. Corrosion Science, 2024, 226: 111636.
[17] TABISH M, ZHAO J M, WANG J B, et al. Improving the corrosion protection ability of epoxy coating using CaAl LDH intercalated with 2-mercaptobenzothiazole as a pigment on steel substrate[J]. Progress in Organic Coatings, 2022, 165: 106765.
[18] MATSCHEI T, BELLMANN F, STARK J. Hydration behaviour of sulphate-activated slag cements[J]. Advances in Cement Research, 2005, 17(4): 167-178.
[19] LONG W J, XIE J, ZHANG X H, et al. Hydration and microstructure of calcined hydrotalcite activated high-volume fly ash cementitious composite[J]. Cement and Concrete Composites, 2021, 123: 104213.
[20] 李妤茜, 乔秀臣. 外部因素对钙矾石晶体结构及形貌的影响综述[J]. 硅酸盐通报, 2023, 42(1): 31-47.
LI Y X, QIAO X C. Review on influences of external factors on crystal structure and morphology of ettringite[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(1): 31-47 (in Chinese).
[21] SHI Z G, LOTHENBACH B, GEIKER M R, et al. Experimental studies and thermodynamic modeling of the carbonation of Portland cement, metakaolin and limestone mortars[J]. Cement and Concrete Research, 2016, 88: 60-72.
[22] DING C, SUN T, SHUI Z H, et al. Physical properties, strength, and impurities stability of phosphogypsum-based cold-bonded aggregates[J]. Construction and Building Materials, 2022, 331: 127307.
[23] MONDAL S K, OKORONKWO M U. Seeding effects of submicron CaAl-NO₃ LDH particles on the hydration and properties of Portland cement and sulfoaluminate cement pastes[J]. Construction and Building Materials, 2024, 423: 135870.
[24] GIJBELS K, PONTIKES Y, SAMYN P, et al. Effect of NaOH content on hydration, mineralogy, porosity and strength in alkali/sulfate-activated binders from ground granulated blast furnace slag and phosphogypsum[J]. Cement and Concrete Research, 2020, 132: 106054.
[25] CHEN Z X, CHU S H, LEE Y S, et al. Coupling effect of γ-dicalcium silicate and slag on carbonation resistance of low carbon materials[J]. Journal of Cleaner Production, 2020, 262: 121385. [26] ZHOU Y, HOU D S, JIANG J Y, et al. Chloride ions transport and adsorption in the nano-pores of silicate calcium hydrate: experimental and molecular dynamics studies[J]. Construction and Building Materials, 2016, 126: 991-1001.
[27] ZHANG Y, ÇOPUROĞLU O. The role of hydrotalcite-like phase and monosulfate in slag cement paste during atmospheric and accelerated carbonation[J]. Cement and Concrete Composites, 2022, 132: 104642.
[28] DUAN P, CHEN W, MA J T, et al. Influence of layered double hydroxides on microstructure and carbonation resistance of sulphoaluminate cement concrete[J]. Construction and Building Materials, 2013, 48: 601-609.
[29] CAO L, GUO J T, TIAN J H, et al. Preparation of Ca/Al-layered double hydroxide and the influence of their structure on early strength of cement[J]. Construction and Building Materials, 2018, 184: 203-214.
[30] 陆瑶, 李双喜, 田亚超, 等. 碱激发剂对超硫酸盐水泥及其混凝土性能的影响[J]. 粉煤灰综合利用, 2020, 34(6): 59-63+115.
LU Y, LI S X, TIAN Y C, et al. The effect of alkali activator on the properties of super sulfate cement and concrete[J]. Fly Ash Comprehensive Utilization, 2020, 34(6): 59-63+115 (in Chinese).
[31] DASH M K, PATRO S K, ACHARYA P K, et al. Impact of elevated temperature on strength and micro-structural properties of concrete containing water-cooled ferrochrome slag as fine aggregate[J]. Construction and Building Materials, 2022, 323: 126542.