废弃混凝土再生微粉制备盾构注浆料及性能演变规律

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (12): 4491-4500.

废弃混凝土再生微粉制备盾构注浆料及性能演变规律

郑圣飚¹, 储玉婷¹, 高鹏^1,2,3,4, 詹炳根^1,2,3,4, 王国陶⁵, 张青峰⁶, 卢炳斗⁶

1.合肥工业大学土木与水利工程学院, 合肥 230009;
2.水泥基材料低碳技术与装备教育部工程研究中心, 合肥 230009;
3.安徽省水泥基材料低碳技术工程研究中心, 合肥 230009;
4.土木工程结构与材料安徽省重点实验室, 合肥 230009;
5.海南恒宝混凝土工程有限公司, 海口 430048;
6.合肥工业大学设计院(集团)有限公司, 合肥 230009

收稿日期:2024-05-31 修订日期:2024-08-25 出版日期:2024-12-15 发布日期:2024-12-19
通信作者: 高鹏,博士,研究员。E-mail:gaop@hfut.edu.cn
作者简介:郑圣飚(1997—),男,硕士研究生。主要从事绿色盾构注浆料方面的研究。E-mail:315182429@qq.com
基金资助:
国家“十三·五”重点研发计划(2020YFC1909902);合肥工业大学设计院(集团)有限公司企业委托(W2023JSKF0404);中央高校基本科研业务费专项资金资助(JZ2023HGTB0256,PA2023GDSK0069)

Preparation of Shield Grouting Material with Recycled Fine Powder from Waste Concrete and Its Performance Evolution

ZHENG Shengbiao¹, CHU Yuting¹, GAO Peng^1,2,3,4, ZHAN Binggen^1,2,3,4, WANG Guotao⁵, ZHANG Qingfeng⁶, LU Bingdou⁶

1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China;
2. Engineering Research Center of Low-Carbon Technology and Equipment for Cement-Based Materials, Ministry of Education, Hefei 230009, China;
3. Anhui Engineering Research Center for Low-Carbon Technology of Cementitious Materials, Hefei 230009, China;
4. Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei 230009, China;
5. Hainan Hengbao Concrete Engineering Co.,Ltd., Haikou 430048, China;
6. Hefei University of Technology Design Institute (Group) Co., Hefei 230009, China

Received:2024-05-31 Revised:2024-08-25 Published:2024-12-15 Online:2024-12-19

摘要/Abstract

摘要： 废弃混凝土解体产生的再生微粉(RFP)产量高,具有一定活性,有望部分替代水泥、粉煤灰和膨润土制备RFP盾构注浆料,然而RFP对盾构注浆料性能的影响规律尚不明确,难以实际应用。本文对RFP盾构注浆料的初始流动度、凝结时间、抗压强度和干燥收缩进行试验测定。结果表明:RFP替代水泥易造成浆体流变性能下降,当RFP替代水泥12.5%(质量分数,下同)时,盾构注浆料流动度为17.6 cm,不满足规范要求(21±3) cm;RFP替代膨润土易导致浆体工作性能降低,当RFP替代膨润土30%时,浆体泌水率为5.2%,且出现分层现象;RFP替代粉煤灰有利于提高浆体流动性能,当RFP替代粉煤灰30%时,浆体流动度增加16.5%,泌水率低,无分层现象。RFP“微集料”效应构筑刚性支撑骨架,能够降低浆体孔隙率,有效抑制干燥收缩。综合各方面性能,优选注浆料配比:水胶比0.31、胶砂比0.66、水泥27%、膨润土44.5%、粉煤灰9.4%、RFP 19.1%、减水剂0.3%。

关键词: 再生微粉, 废弃混凝土, 盾构注浆料, 膨润土, 干燥收缩

Abstract: Recycled fine powder (RFP) produced by the disintegration of waste concrete has high yield and certain activity, which is expected to partially replace cement, fly ash and bentonite to prepare RFP shield grouting material. However, RFP influence on the performance of shield grouting material is not clear, which is difficult to guide engineering application. In this paper, the initial fluidity, setting time, compressive strength and drying shrinkage of RFP shield grouting material were tested. The results show that the RFP replacement of cement is easy to decrease the rheological properties of shield grouting material. When RFP replaces 12.5% (mass fraction, same below) cement, the fluidity of shield grouting material is 17.6 cm, which does not meet the specification requirements (21±3) cm. The replacement of bentonite by RFP results in the deterioration of slurry mance. When RFP replaces 30% bentonite, the shield grouting material bleeding rate is 5.2%, and the stratification phenomenon occurs. The replacement of fly ash by RFP is beneficial to improve the fluidity. When RFP replaces 30% fly ash, the fluidity of shield grouting material increases by 16.5%, the bleeding rate is low, and there is no stratification. The RFP ‘micro-aggregate’ effect builds a rigid support skeleton, which can reduce the porosity of shield grouting material and effectively inhibit drying shrinkage. Based on the performance of all aspects, the optimum slurry ratio is: water-binder ratio 0.31, cement-sand ratio 0.66, cement 27%, bentonite 44.5%, fly ash 9.4%, RFP 19.1%, water reducer 0.3%.

Key words: recycled fine powder, waste concrete, shield grouting material, bentonite, drying shrinkage

中图分类号:

TQ172.7

郑圣飚, 储玉婷, 高鹏, 詹炳根, 王国陶, 张青峰, 卢炳斗. 废弃混凝土再生微粉制备盾构注浆料及性能演变规律[J]. 硅酸盐通报, 2024, 43(12): 4491-4500.

ZHENG Shengbiao, CHU Yuting, GAO Peng, ZHAN Binggen, WANG Guotao, ZHANG Qingfeng, LU Bingdou. Preparation of Shield Grouting Material with Recycled Fine Powder from Waste Concrete and Its Performance Evolution[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(12): 4491-4500.

参考文献

[1] 刘垚, 张文新, 李志, 等. 海域环境下泥水盾构同步盾构注浆料性能试验研究[J]. 国防交通工程与技术, 2023, 21(2): 73-76+72.
LIU Y, ZHANG X W, LI Z, et al. Experimental study on the performance of synchronized shield grouting material for mud-water shield in marine environment[J]. Defense Transportation Engineering and Technology, 2023, 21(2): 73-76+72 (in Chinese).
[2] 周济民. 水下盾构法隧道双层衬砌结构力学特性[D]. 成都: 西南交通大学, 2012.
ZHOU J M. Research on mechanical behavior of double-layer lining structure for underwater shield tunnel[D]. Chengdu: Southwest Jiaotong University, 2012 (in Chinese).
[3] 徐建平, 林文书, 许可, 等. 盾构隧道快硬高性能同步注浆材料研究[J]. 隧道建设, 2014, 34(2): 95-100.
XU J P, LIN W S, XU K, et al. Study on rapid-hardening high-performance simultaneous grouting material for shield-bored tunnels[J]. Tunnel Construction, 2014, 34(2): 95-100 (in Chinese).
[4] 李书进, 刘源涛, 厉见芬, 等. 盾构废弃泥沙再生制备高性能注浆材料的试验研究[J]. 材料导报, 2021, 35(增刊2): 275-278.
LI S J, LIU Y T, LI J F, et al. Experimental study on the preparation of high-performance grouting materials by regenerating waste sediment of shield structure[J]. Materials Herald, 2021, 35(supplement 2): 275-278 (in Chinese).
[5] 宋维龙. 碱激发工业废渣基盾构隧道壁后注浆浆液特性与扩散机理研究[D]. 南京: 东南大学, 2021.
SONG W L. Study on characteristics and diffusion mechanism of grouting slurry behind the wall of alkali-activated industrial waste residue-based shield tunnel[D]. Nanjing: Southeast University, 2021 (in Chinese).
[6] 张益杰. 盾构渣土基轻质同步注浆材料及其扩散机理研究[D]. 济南: 山东大学, 2022.
ZHANG Y J. Study on lightweight synchronous grouting material for shield muck foundation and its diffusion mechanism[D]. Jinan: Shandong University, 2022 (in Chinese).
[7] REN P F, LI B, YU J G, et al. Utilization of recycled concrete fines and powders to produce alkali-activated slag concrete blocks[J]. Journal of Cleaner Production, 2020, 267: 122115.
[8] 马郁. 掺建筑垃圾再生微粉混凝土性能试验研究[J]. 混凝土与水泥制品, 2016(10): 88-90.
MA Y. Experimental study on properties of recycled micro-powder concrete mixed with construction waste[J]. China Concrete and Cement Products, 2016(10): 88-90 (in Chinese).
[9] 李飞, 李威翰, 卢亚, 等. 再生微粉对碱激发胶凝材料性能的影响[J]. 材料科学与工程学报, 2023, 41(4): 583-588+596.
LI F, LI W H, LU Y, et al. Effect of recycled micro powder on properties of alkali-activated cementitious materials[J]. Journal of Materials Science and Engineering, 2023, 41(4): 583-588+596 (in Chinese).
[10] 崔宁, 栾仲豪. 砖混类再生微粉泡沫胶凝材料力学性能研究[J]. 硅酸盐通报, 2022, 41(7): 2421-2429.
CUI N, LUAN Z H. Mechanical properties of recycled fine powder foamed cementitious materials for brick and concrete[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(7): 2421-2429 (in Chinese).
[11] MAO X Q, QU W J, ZHU P, et al. Influence of recycled powder on chloride penetration resistance of green reactive powder concrete[J]. Construction and Building Materials, 2020, 251: 119049.
[12] 高鹏, 陈阳, 黄浩良, 等. 干燥环境下混凝土内部损伤的量化[J]. 硅酸盐学报, 2021, 49(2): 312-322.
GAO P, CHEN Y, HUANG H L, et al. Quantification of damage in concrete under drying condition[J]. Journal of the Chinese Ceramic Society, 2021, 49(2): 312-322 (in Chinese).
[13] 虞晓婧, 王建刚, 王海波, 等. 建筑垃圾再生微粉对C30～C40再生混凝土性能的影响[J]. 混凝土, 2024(4): 147-151+156.
YU X J, WANG J G, WANG H B, et al. Effect of recycled micro powder on the performance of C30~C40 recycled concrete[J]. Concrete, 2024(4): 147-151+156 (in Chinese).
[14] 樊耀虎, 李滢, 康晓明. 再生微粉和粉煤灰对胶砂力学性能及微观结构影响研究[J]. 硅酸盐通报, 2019, 38(2): 537-542.
FAN Y H, LI Y, KANG X M. Effect of regenerated powder and fly ash on mechanical properties and microstructure of mortar[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(2): 537-542 (in Chinese).
[15] 梁小英. 富水地层盾构施工同步注浆材料性能及配合比设计研究[D]. 西安: 长安大学, 2009.
LIANG X Y. Study on properties and mix design of synchronous grouting materials for shield construction in water-rich strata[D]. Xi’an: Changan University, 2009 (in Chinese).
[16] 刘力, 刘小艳, 李田雨, 等. 再生微粉对水泥浆早期性能和流变性能的影响[J]. 混凝土, 2021(7): 114-117.
LIU L, LIU X Y, LI T Y, et al. Effect of recycled fine powder on early-age properties and rheological properties of cement paste[J]. Concrete, 2021(7): 114-117 (in Chinese).
[17] SUN D S, HUANG N N, LIU K W, et al. Effect of recycled fine powder on autoclaved aerated concrete: gas-foaming, physic-mechanical property and hydration products[J]. Journal of Building Engineering, 2023, 67: 106013.
[18] 耿健, 孙家瑛, 莫立伟, 等. 再生细骨料及其混凝土的微观结构特征[J]. 土木建筑与环境工程, 2013, 35(2): 135-140.
GENG J, SUN J Y, MO L W, et al. Micro-structure characteristics of recycled fine aggregate and its concrete[J]. Journal of Civil, Architectural & Environmental Engineering, 2013, 35(2): 135-140 (in Chinese).
[19] WU H X, LIANG C F, XIAO J Z, et al. Early-age behavior and mechanical properties of cement-based materials with various types and fineness of recycled powder[J]. Structural Concrete, 2022, 23(2): 1253-1272.
[20] LUCKHAM P F, ROSSI S. The colloidal and rheological properties of bentonite suspensions[J]. Advances in Colloid and Interface Science, 1999, 82(1/2/3): 43-92.
[21] LI S J, GAO J M, LI Q Y, et al. Investigation of using recycled powder from the preparation of recycled aggregate as a supplementary cementitious material[J]. Construction and Building Materials, 2021, 267: 120976.
[22] 周长顺, 吉红波, 赵丽颖. 再生微粉在水泥基材料中的应用与研究进展[J]. 硅酸盐通报, 2019, 38(8): 2456-2463.
ZHOU C S, JI H B, ZHAO L Y, et al. Application and research progress of recycled micro-powders in cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(8): 2456-2463 (in Chinese).
[23] ROBAYO-SALAZAR R, VARGAS A, MARTÍNEZ F, et al. Utilization of powders and fine aggregates from the recycling of construction and demolition waste in the 3D printing of Portland-based cementitious materials[J]. Cleaner Materials, 2024, 11: 100234.
[24] 刘聪. 碱激发再生微粉胶凝材料制备及其应用研究[D]. 扬州: 扬州大学, 2021.
LIU C. Research on preparation and application of alkali activated recycled concrete powder cementitious material[D]. Yangzhou: Yangzhou University, 2021 (in Chinese).
[25] 杨宏天, 李北星, 易浩, 等. 再生微粉代粉煤灰对再生混凝土性能的影响[J]. 水利水电技术(中英文), 2023, 54(8): 197-207.
YANG H T, LI B X, YI H, et al. Effect of replacement of fly ash with recycled powder on properties of recycled concrete[J]. Water Resources and Hydropower Engineering, 2023, 54(8): 197-207 (in Chinese).