超细水泥-硅灰二元低pH注浆材料特性研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (4): 1156-1165.

所属专题：水泥混凝土

超细水泥-硅灰二元低pH注浆材料特性研究

赵卫全¹, 任增增¹, 张金接¹, 李勇辉¹, 张翔宇²

1.中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京 100038;
2.中国矿业大学深部岩土力学与地下工程国家重点实验室,徐州 221116

收稿日期:2022-12-20 修订日期:2023-02-07 出版日期:2023-04-15 发布日期:2023-04-25
通信作者: 任增增,博士研究生。E-mail:zskrzziwhr@163.com
作者简介:赵卫全(1978—),男,博士,正高级工程师。主要从事注浆材料研究及应用方面的工作。E-mail:zhaowq@iwhr.com
基金资助:
核设施退役治理专项资助科研项目(科工二司[2020]194号);中国水利水电科学研究院重点专项(EM0145B022021)

Characteristics of Binary Low-pH Grouting Material Containing Superfine Cement and Silica Fume

ZHAO Weiquan¹, REN Zengzeng¹, ZHANG Jinjie¹, LI Yonghui¹, ZHANG Xiangyu²

1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
2. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China

Received:2022-12-20 Revised:2023-02-07 Online:2023-04-15 Published:2023-04-25

摘要/Abstract

摘要： 采用简化磨碎溶出法测试了硅灰(SF)掺量为30%~50%(质量分数,下同)、水胶比为1.4的超细水泥(SC)注浆材料结石体在不同龄期的pH值,探讨SF掺量、SiO₂含量和C-S-H凝胶理论钙硅摩尔比对注浆材料pH值的影响,并测试了60%SC+40%SF低pH注浆材料的流变性能和力学性能,同时利用SEM、XRD、TG表征手段分析了结石体的水化产物和微观结构。结果表明,当SF掺量大于40%、SiO₂含量大于50%、C-S-H凝胶钙硅摩尔比小于0.8时,结石体pH值小于11.00。萘系减水剂(SP)能显著降低浆液的马氏漏斗黏度,SP适宜掺量为1.6%。宾汉姆模型能够很好地描述浆液流变性能。水胶比的提高对结石体抗压强度有不利影响,因此水胶比不宜超过1.6。由于SF具有火山灰效应和稀释效应,养护180 d后结石体内不存在Ca(OH)₂,其主要水化产物为低钙硅比的C-S-H凝胶和钙矾石。

关键词: 低pH注浆材料, 超细水泥, 硅灰, 钙硅摩尔比, 孔溶液, 结石体

Abstract: The pH value of superfine cement (SC) grouting material stone body with silica fume (SF) content of 30%~50% (mass fraction, the same below) and water-binder ratio of 1.4 at different ages was measured by simplified ex-situ leaching method. Meanwhile, the effects of SF content, SiO₂ content and theoretical Ca/Si molar ratio of C-S-H gel on grouting material pH value were investigated. The rheological properties and mechanical properties of 60%SC+40%SF low-pH grouting material were examined. In addition, SEM, XRD and TG were used to examine the hydration products and microstructure of stone body. The results show that when SF content is more than 40%, SiO₂ content is more than 50% and Ca/Si molar ratio of C-S-H gel is less than 0.8, the pH value of stone body is less than 11.00. The naphthalene superplasticizer (SP) greatly reduces the marsh funnel viscosity of slurry, and the appropriate content of SP is 1.6%. The Bingham model provides a satisfactory description of the rheological properties of slurry. The increase of water-binder ratio has adverse effect on the compressive strength of stone body, so the water-binder ratio should not exceed 1.6. Due to the pozzolanic effect and dilution effect of SF, there is no Ca(OH)₂ in stone body after curing for 180 d, and its principal hydration products are C-S-H gel with a low Ca/Si molar ratio and ettringite.

Key words: low-pH grouting material, superfine cement, silica fume, Ca/Si molar ratio, pore solution, stone body

中图分类号:

TU172.1

赵卫全, 任增增, 张金接, 李勇辉, 张翔宇. 超细水泥-硅灰二元低pH注浆材料特性研究[J]. 硅酸盐通报, 2023, 42(4): 1156-1165.

ZHAO Weiquan, REN Zengzeng, ZHANG Jinjie, LI Yonghui, ZHANG Xiangyu. Characteristics of Binary Low-pH Grouting Material Containing Superfine Cement and Silica Fume[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(4): 1156-1165.

参考文献

[1] WANG J, CHEN L, SU R, et al. The Beishan underground research laboratory for geological disposal of high-level radioactive waste in China: planning, site selection, site characterization and in situ tests[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2018, 10(3): 411-435.
[2] VASCONCELOS R G W, WALKLEY B, DAY S, et al. 18-month hydration of a low-pH cement for geological disposal of radioactive waste: the Cebama reference cement[J]. Applied Geochemistry, 2020, 116: 104536.
[3] KRONLÖF A. Injection grout for deep repositories-low pH cementitious grout for larger fractures: testing technical performance of materials[R]. Finland: Posiva Working Report, 2005.
[4] NI C X, WU Q Y, YU Z Q, et al. Hydration of Portland cement paste mixed with densified silica fume: from the point of view of fineness[J]. Construction and Building Materials, 2021, 272: 121906.
[5] GARCÍA CALVO J L, HIDALGO A, ALONSO C, et al. Development of low-pH cementitious materials for HLRW repositories resistance against ground waters aggression[J]. Cement and Concrete Research, 2010, 40(8): 1290-1297.
[6] COUMES C, COURTOIS S, NECTOUX D, et al. Formulating a low-alkalinity, high-resistance and low-heat concrete for radioactive waste repositories[J]. Cement and Concrete Research, 2006, 36(12): 2152-2163.
[7] CODINA M, CAU-DIT-COUMES C, BESCOP P L, et al. Design and characterization of low-heat and low-alkalinity cements[J]. Cement and Concrete Research, 2008, 38(4): 437-448.
[8] BODEN A, SIEVAENEN U. Low-pH injection grout for deep repositories[R]. Stockholm: Swedish Nuclear Fuel and Waste Management Co., 2005.
[9] KIM J S, KWON S, CHOI J W, et al. Properties of low-pH cement grout as a sealing material for the geological disposal of radioactive waste[J]. Nuclear Engineering and Technology, 2011, 43(5): 459-468.
[10] LOTHENBACH B, RENTSCH D, WIELAND E. Hydration of a silica fume blended low-alkali shotcrete cement[J]. Physics and Chemistry of the Earth, Parts A/B/C, 2014, 70: 3-16.
[11] ORANTIE K, KUOSA H. Injection grout investigations[R]. Finland: Posiva, 2008.
[12] TAYLOR H F W. Cement chemistry[M]. 2nd ed. London: Thomas Telford, 1997.
[13] ALONSO M C, GARCIA C, WALKER C. Development of an accurate pH measurement methodology for the pore fluids of low pH cementitious materials[R]. Stockholm: Swedish Nuclear Fuel and Waste Management, 2012.
[14] REN Z Z, ZHAO W Q, CHEN L, et al. Investigation into the pH measurement methodology of low pH cementitious materials[J]. Water Resources and Hydropower Engineering, 2022, 53(12): 125-133.
[15] 李向南, 左晓宝, 崔冬, 等. 水泥净浆养护-溶蚀全过程数值模拟[J]. 建筑材料学报, 2020, 23(5): 1008-1015.
LI X N, ZUO X B, CUI D, et al. Numerical simulation on entire process of curing and leaching of cement paste[J]. Journal of Building Materials, 2020, 23(5): 1008-1015 (in Chinese).
[16] LOTHENBACH B, SCRIVENER K, HOOTON R D. Supplementary cementitious materials[J]. Cement and Concrete Research, 2011, 41(12): 1244-1256.
[17] ALONSO M C, GARCÍA CALVO J L, HIDALGO A, et al. Development and application of low-pH concretes for structural purposes in geological repository systems[M]//Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste. Amsterdam: Elsevier, 2010: 286-322.
[18] 李响. 复合水泥基材料水化性能与浆体微观结构稳定性[D]. 北京: 清华大学, 2010.
LI X. Hydration performance and microstructural stability of complex cementitious materials[D]. Beijing: Tsinghua University, 2010 (in Chinese).
[19] BACH T T H, COUMES C C D, POCHARD I, et al. Influence of temperature on the hydration products of low pH cements[J]. Cement and Concrete Research, 2012, 42(6): 805-817.
[20] LOTHENBACH B, NONAT A. Calcium silicate hydrates: solid and liquid phase composition[J]. Cement and Concrete Research, 2015, 78: 57-70.
[21] HONG S Y, GLASSER F P. Alkali sorption by C-S-H and C-A-S-H gels part II. role of alumina[J]. Cement and Concrete Research, 2002, 32(7): 1101-1111.
[22] 封孝信, 冯乃谦. 碱在C-S-H凝胶中的存在形式[J]. 建筑材料学报, 2004, 7(1): 1-7.
FENG X X, FENG N Q. Investigation of the binding forms of the alkalis in C-S-H[J]. Journal of Building Materials, 2004, 7(1): 1-7 (in Chinese).
[23] ATKINSON A, EVERITT N M, GUPPY R. Evolution of pH in a radwaste repository: experimental simulation of cement leaching[R]. London: Materials Development, 1987.
[24] STRONACH S A, GLASSER F P. Modelling the impact of abundant geochemical components on phase stability and solubility of the CaO-SiO₂-H₂O system at 25 ℃: Na⁺, K⁺, SO^2-₄, Cl^- and CO^2-₃[J]. Advances in Cement Research, 1997, 9(36): 167-181.
[25] CHEN J J, THOMAS J J, TAYLOR H F W, et al. Solubility and structure of calcium silicate hydrate[J]. Cement and Concrete Research, 2004, 34(9): 1499-1519.
[26] HARRIS A W, MANNING M C, TEARLE W M, et al. Testing of models of the dissolution of cements: leaching of synthetic CSH gels[J]. Cement and Concrete Research, 2002, 32(5): 731-746.
[27] LI S C, SHA F, LIU R T, et al. Investigation on fundamental properties of microfine cement and cement-slag grouts[J]. Construction and Building Materials, 2017, 153: 965-974.
[28] YE Q, ZHANG Z N, KONG D Y, et al. Influence of nano-SiO₂ addition on properties of hardened cement paste as compared with silica fume[J]. Construction and Building Materials, 2007, 21(3): 539-545.
[29] SCRIVENER K, SNELLINGS R, LOTHENBACH B. A practical guide to microstructural analysis of cementitious materials[M]. USA: Boca Raton, FL, Crc Press, 2016.
[30] YAN Y R, YANG S Y, MIRON G D, et al. Effect of alkali hydroxide on calcium silicate hydrate (C-S-H)[J]. Cement and Concrete Research, 2022, 151: 106636.
[31] MOSTAFA N Y, MOHSEN Q, EL-HEMALY S A S, et al. High replacements of reactive pozzolan in blended cements: microstructure and mechanical properties[J]. Cement and Concrete Composites, 2010, 32(5): 386-391.

超细水泥-硅灰二元低pH注浆材料特性研究

Characteristics of Binary Low-pH Grouting Material Containing Superfine Cement and Silica Fume

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