不同类型减水剂对渣土基高流态回填材料性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (9): 3227-3233.

不同类型减水剂对渣土基高流态回填材料性能的影响

谭正日, 谭洪波, 吕周岭, 孔祥辉, 蹇守卫, 马保国

武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2022-05-25 修回日期:2022-06-22 出版日期:2022-09-15 发布日期:2022-09-27
通讯作者: 谭洪波,博士,教授。E-mail:thbwhut@whut.edu.cn
作者简介:谭正日(1998—),男,硕士研究生。主要从事硅酸盐材料的研究。E-mail:3230392440@qq.com
基金资助:
“十三五”国家重点研发计划子课题(2019YFC1907103-02);湖北省技术创新重大专项(2020BCA077)

Effect of Plasticizer Type on Properties of Construction Spoil Based High-Fluid Backfill Materials

TAN Zhengri, TAN Hongbo, LYU Zhouling, KONG Xianghui, JIAN Shouwei, MA Baoguo

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2022-05-25 Revised:2022-06-22 Online:2022-09-15 Published:2022-09-27

摘要/Abstract

摘要： 相比传统回填材料,渣土基高流态回填材料具有高流态、自流平、自密实等优点,能够有效避免因压实不充分导致的工程问题。然而,渣土基高流态回填材料在使用中存在易沉陷、易泌水等问题,限制了其工程化应用空间。在本文中,选择了聚羧酸减水剂(PCE)、脂肪族减水剂(SAF)、萘系减水剂(FDN)、三聚氰胺减水剂(PMS)四种减水剂来调节渣土基高流态回填材料的用水量和流动度,同时比较了四种减水剂对渣土基高流态回填材料性能的影响。结果表明:在保持相同流动度下,四种减水剂的减水效果从高到低依次为PCE＞SAF＞PMS＞FDN;在经时流动度方面,FDN体系较其他减水剂体系在1 h内具有更好的流动性,四种减水剂体系的流动度保持性从优到劣依次为FDN＞PCE＞PMS＞SAF;四种减水剂均能降低渣土基高流态回填材料的泌水率,缩短渣土基高流态回填材料的凝结时间。

关键词: 建筑渣土, 回填材料, 减水剂, 泌水率, 流动性, 凝结时间, 抗压强度

Abstract: Construction spoil based high-fluid backfill material has the advantages of high fluidity, self-leveling, self-compaction and so on. Compared with the traditional backfill materials, it can effectively avoid the engineering problems caused by insufficient compaction. However, construction spoil based high-fluid backfill material is easy to settle and bleeding, which limits its engineering application. In this paper, polycarboxylate superplasticizer (PCE), sulfonated acetone formaldehyde (SAF), naphthalene superplasticizer (FDN) and melamine superplasticizer (PMS) were used to reduce water consumption and optimize fluidity. Meanwhile, the effects of four plasticizers on the properties of construction spoil based high-fluid backfill materials were compared. The results indicate that under the same fluidity, the water reducing effect of four plasticizers decreases in order: PCE>SAF>PMS>FDN. In terms of temporal fluidity, FDN system has better fluidity within 1 h than other plasticizer systems. The fluidity retention of four plasticizers systems decreases in order: FDN>PCE>PMS>SAF. Four plasticizers significantly reduce the bleeding rate of construction spoil based high-fluid backfill materials and shorten the setting time.

Key words: construction spoil, backfill material, plasticizer, bleeding rate, fluidity, setting time, compressive strength

中图分类号:

U414

谭正日, 谭洪波, 吕周岭, 孔祥辉, 蹇守卫, 马保国. 不同类型减水剂对渣土基高流态回填材料性能的影响[J]. 硅酸盐通报, 2022, 41(9): 3227-3233.

TAN Zhengri, TAN Hongbo, LYU Zhouling, KONG Xianghui, JIAN Shouwei, MA Baoguo. Effect of Plasticizer Type on Properties of Construction Spoil Based High-Fluid Backfill Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(9): 3227-3233.

参考文献

[1] 张凯东.流动化渣土回填基坑侧壁的应用研究[D].镇江:江苏科技大学,2021.
ZHANG K D. Study on application of fluidized waste soil backfilling foundation pit side wall[D]. Zhenjiang: Jiangsu University of Science and Technology, 2021 (in Chinese).
[2] MENG M F, WEN Z G, LUO W J, et al. Approaches and policies to promote zero-waste city construction: China's practices and lessons[J]. Sustainability, 2021, 13(24): 13537.
[3] 李思文,王毅,李师.国外余泥渣土的处置方法及其借鉴作用[J].中国土地,2020(12):44-46.
LI S W, WANG Y, LI S. Disposal of residual soil abroad and its reference[J]. China Land, 2020(12): 44-46 (in Chinese).
[4] LE D H, NGUYEN K H. An assessment of eco-friendly controlled low-strength material[J]. Procedia Engineering, 2016, 142: 260-267.
[5] NATARAJA M C, NALANDA Y. Performance of industrial by-products in controlled low-strength materials (CLSM)[J]. Waste Management, 2008, 28(7): 1168-1181.
[6] FINNEY A J, SHOREY E F, ANDERSON J. Use of native soil in place of aggregate in controlled low strength material (CLSM)[C]//International Pipelines Conference. 2008: 1-13.
[7] WU J Y. Soil-based flowable fill for pipeline construction[C]//Pipeline Division Specialty Conference. 2005: 925-938.
[8] DO T M, KIM Y S, RYU B C. Improvement of engineering properties of pond ash based CLSM with cementless binder and artificial aggregates made of bauxite residue[J]. International Journal of Geo-Engineering, 2015, 6: 8.
[9] LING T C, KALIYAVARADHAN S K, POON C S. Global perspective on application of controlled low-strength material (CLSM) for trench backfilling: an overview[J]. Construction and Building Materials, 2018, 158: 535-548.
[10] SHEEN Y N, ZHANG L H, LE D H. Engineering properties of soil-based controlled low-strength materials as slag partially substitutes to Portland cement[J]. Construction and Building Materials, 2013, 48: 822-829.
[11] WU J Y, TSAI M. Feasibility study of a soil-based rubberized CLSM[J]. Waste Management, 2009, 29(2): 636-642.
[12] JIAN S W, CHENG C, WANG J, et al. Effect of sulfonated acetone formaldehyde on the properties of high-fluid backfill materials[J]. Construction and Building Materials, 2022, 327: 126795.
[13] TAN H B, GU B Q, MA B G, et al. Mechanism of intercalation of polycarboxylate superplasticizer into montmorillonite[J]. Applied Clay Science, 2016, 129: 40-46.
[14] FERNANDES V A, PURNELL P, STILL G T, et al. The effect of clay content in sands used for cementitious materials in developing countries[J]. Cement and Concrete Research, 2007, 37(5): 751-758.
[15] BURGOS-MONTES O, PALACIOS M, RIVILLA P, et al. Compatibility between superplasticizer admixtures and cements with mineral additions[J]. Construction and Building Materials, 2012, 31: 300-309.
[16] 李苑.泥对聚羧酸减水剂分散性影响研究[D].重庆:重庆大学,2011.
LI Y. Effects of clay on the dispersibility of polycarboxylate superplasticizer[D]. Chongqing: Chongqing University, 2011 (in Chinese).
[17] TAN H B, GU B Q, GUO Y L, et al. Improvement in compatibility of polycarboxylate superplasticizer with poor-quality aggregate containing montmorillonite by incorporating polymeric ferric sulfate[J]. Construction and Building Materials, 2018, 162: 566-575.
[18] 马永贵,韩青峰.抗泥型聚羧酸系减水剂的合成及在PCCP混凝土中的应用[J].水利水电技术,2016,47(8):59-62.
MA Y G, HAN Q F. Synthesis of clay tolerance of polycarboxylate superplasticizer and its application in PCCP concrete[J]. Water Resources and Hydropower Engineering, 2016, 47(8): 59-62 (in Chinese).
[19] 代柱端.减水剂对不同胶凝材料的吸附及流变性调控机理[D].武汉:武汉理工大学,2014.
DAI Z D. Adsorption and rheology regulation mechanism of superplasticizers on different cementitious materials[D]. Wuhan: Wuhan University of Technology, 2014 (in Chinese).
[20] YAN D Y S, TANG I Y, LO I M C. Development of controlled low-strength material derived from beneficial reuse of bottom ash and sediment for green construction[J]. Construction and Building Materials, 2014, 64: 201-207.
[21] GHANAD D A, SOLIMAN A M. Bio-based alkali-activated controlled low strength material: engineering properties[J]. Construction and Building Materials, 2021, 279: 122445.
[22] 张宏,凌建明,钱劲松.可控性低强度材料(CLSM)研究进展[J].华东公路,2011(6):49-54.
ZHANG H, LING J M, QIAN J S. Research progress of controllable low strength materials (CLSM)[J]. East China Highway, 2011(6): 49-54 (in Chinese).